fakecloud_cloudformation/resource_provisioner/

mod.rs

use chrono::Utc;
use parking_lot::RwLock;
use std::collections::BTreeMap;
use std::sync::Arc;
use uuid::Uuid;

use crate::state::SharedCloudFormationState;
use fakecloud_acm::{
    CertificateOptions as AcmCertificateOptions, DomainValidation as AcmDomainValidation,
    RenewalSummary as AcmRenewalSummary, SharedAcmState, StoredCertificate as AcmStoredCertificate,
};
use fakecloud_apigateway::{
    make_id as apigw_make_id, ApiKey as ApiGwApiKey, Authorizer as ApiGwAuthorizer,
    Deployment as ApiGwDeployment, Integration as ApiGwIntegration, Method as ApiGwMethod,
    Model as ApiGwModel, Resource as ApiGwResource, RestApi as ApiGwRestApi, SharedApiGatewayState,
    Stage as ApiGwStage, UsagePlan as ApiGwUsagePlan,
};
use fakecloud_apigatewayv2::{
    Authorizer as ApiGwV2Authorizer, CorsConfiguration as ApiGwV2CorsConfiguration,
    Deployment as ApiGwV2Deployment, HttpApi as ApiGwV2HttpApi, Integration as ApiGwV2Integration,
    JwtConfiguration as ApiGwV2JwtConfiguration, Route as ApiGwV2Route, SharedApiGatewayV2State,
    Stage as ApiGwV2Stage,
};
use fakecloud_application_autoscaling::{
    ScalableTarget as AppasScalableTarget, ScalingPolicy as AppasScalingPolicy,
    SharedApplicationAutoScalingState as AppasState, SuspendedState as AppasSuspendedState,
};
use fakecloud_athena::{DataCatalog, NamedQuery, PreparedStatement, SharedAthenaState, WorkGroup};
use fakecloud_aws::arn::Arn;
use fakecloud_cloudfront::{
    functions::{
        CloudFrontOriginAccessIdentityConfig, FunctionConfig, KeyGroupConfig, KeyGroupItems,
        PublicKeyConfig, StoredFunction, StoredKeyGroup, StoredOriginAccessIdentity,
        StoredPublicKey,
    },
    model::{
        DefaultCacheBehavior, DistributionConfig, Origin, OriginItems, Origins, ViewerCertificate,
    },
    policies::{
        CachePolicyConfig, OriginAccessControlConfig, OriginRequestPolicyConfig,
        OriginRequestPolicyCookiesConfig, OriginRequestPolicyHeadersConfig,
        OriginRequestPolicyQueryStringsConfig, ResponseHeadersPolicyConfig, StoredCachePolicy,
        StoredOriginAccessControl, StoredOriginRequestPolicy, StoredResponseHeadersPolicy,
    },
    SharedCloudFrontState, StoredDistribution,
};
use fakecloud_cloudwatch::{AlarmState, Dashboard, MetricAlarm, SharedCloudWatchState};
use fakecloud_cognito::{
    default_schema_attributes, AccountRecoverySetting, AdminCreateUserConfig,
    CognitoIdentityProvider, CustomDomainConfig, EmailConfiguration, IdentityPool,
    IdentityPoolRoleAttachment, PasswordPolicy, PoolPolicies, RecoveryOption, SchemaAttribute,
    SharedCognitoState, SignInPolicy, SmsConfiguration, UserPool, UserPoolClient, UserPoolDomain,
};
use fakecloud_core::delivery::DeliveryBus;
use fakecloud_dynamodb::{
    AttributeDefinition, DynamoTable, KeySchemaElement, OnDemandThroughput, ProvisionedThroughput,
    SharedDynamoDbState,
};
use fakecloud_ecr::{Repository, SharedEcrState};
use fakecloud_ecs::{
    CapacityProvider as EcsCapacityProvider, Cluster as EcsCluster, Service as EcsService,
    SharedEcsState, TagEntry as EcsTagEntry, TaskDefinition as EcsTaskDefinition,
};
use fakecloud_elasticache::{
    CacheCluster as EcCacheCluster, CacheParameterGroup, CacheSecurityGroup, CacheSubnetGroup,
    ElastiCacheUser as EcUser, ElastiCacheUserGroup as EcUserGroup,
    ReplicationGroup as EcReplicationGroup, SharedElastiCacheState,
};
use fakecloud_elbv2::{
    Action as ElbAction, Listener, LoadBalancer, Rule as ElbRule, RuleCondition, SharedElbv2State,
    Tag as ElbTag, TargetGroup, TargetGroupTuple,
};
use fakecloud_eventbridge::{
    ApiDestination, Archive, Connection, Endpoint, EventBus, EventRule, SharedEventBridgeState,
};
use fakecloud_firehose::{DeliveryStream, S3Destination};
use fakecloud_iam::{
    IamAccessKey, IamGroup, IamInstanceProfile, IamPolicy, IamRole, IamUser, OidcProvider,
    PolicyVersion, SamlProvider, SharedIamState, Tag, VirtualMfaDevice,
};
use fakecloud_kinesis::{build_stream_shards, KinesisConsumer, KinesisStream, SharedKinesisState};
use fakecloud_kms::provisioner as kms_provisioner;
use fakecloud_kms::SharedKmsState;
use fakecloud_lambda::{
    AttachedLayer, EventSourceMapping, FunctionAlias, FunctionUrlConfig, Layer, LayerVersion,
    SharedLambdaState,
};
use fakecloud_logs::{
    Delivery, DeliveryDestination, DeliverySource, Destination, LogStream, MetricFilter,
    MetricTransformation, QueryDefinition, ResourcePolicy, SharedLogsState, SubscriptionFilter,
};
use fakecloud_organizations::{
    OrganizationState, OrganizationalUnit, Policy as OrgPolicy, SharedOrganizationsState,
    POLICY_TYPE_SCP,
};
use fakecloud_persistence::{BucketSubresource, S3Store};
use fakecloud_rds::{DbInstance, DbParameterGroup, DbSubnetGroup, RdsTag, SharedRdsState};
use fakecloud_route53::{
    model::{HealthCheckConfig, HostedZoneFeatures, ResourceRecordSet},
    SharedRoute53State, StoredHealthCheck, StoredHostedZone,
};
use fakecloud_s3::persistence::bucket_meta_snapshot;
use fakecloud_s3::{S3Bucket, SharedS3State};
use fakecloud_secretsmanager::{RotationRules, Secret, SecretVersion, SharedSecretsManagerState};
use fakecloud_ses::{
    ConfigurationSet as SesConfigurationSet, ContactList as SesContactList,
    DedicatedIpPool as SesDedicatedIpPool, EmailIdentity as SesEmailIdentity,
    EmailTemplate as SesEmailTemplate, EventDestination as SesEventDestination,
    IpFilter as SesIpFilter, ReceiptAction as SesReceiptAction, ReceiptFilter as SesReceiptFilter,
    ReceiptRule as SesReceiptRule, ReceiptRuleSet as SesReceiptRuleSet, SharedSesState,
};
use fakecloud_sns::{SharedSnsState, SnsSubscription, SnsTopic};
use fakecloud_sqs::{SharedSqsState, SqsQueue};
use fakecloud_ssm::{SharedSsmState, SsmParameter};
use fakecloud_stepfunctions::{
    Activity as SfnActivity, AliasRoute, SharedStepFunctionsState, StateMachine, StateMachineAlias,
    StateMachineStatus, StateMachineType, StateMachineVersion,
};
use fakecloud_wafv2::{IpSet, RegexPatternSet, RuleGroup, SharedWafv2State, WebAcl};

use crate::state::StackResource;
use crate::template::ResourceDefinition;

/// Convert a CFN `Tags` property (`[{Key, Value}, ...]`) into the IAM
/// crate's `Tag` Vec form. Silently skips malformed entries — the same
/// tolerant behaviour the existing IAM service uses for runtime input.
fn parse_iam_tags(value: Option<&serde_json::Value>) -> Vec<Tag> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .filter_map(|t| {
            let key = t.get("Key").and_then(|v| v.as_str())?.to_string();
            let value = t.get("Value").and_then(|v| v.as_str())?.to_string();
            Some(Tag { key, value })
        })
        .collect()
}

/// Mirror of `parse_iam_tags` but for the ELBv2 crate's separate `Tag`
/// type. Same `[{Key, Value}, ...]` JSON shape, ignored on malformed entries.
fn parse_elb_tags(value: Option<&serde_json::Value>) -> Vec<ElbTag> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .filter_map(|t| {
            let key = t.get("Key").and_then(|v| v.as_str())?.to_string();
            let value = t.get("Value").and_then(|v| v.as_str())?.to_string();
            Some(ElbTag { key, value })
        })
        .collect()
}

/// Translate CFN-shape Listener/ListenerRule actions into ELBv2 internal
/// `Action`s. Only the action-type knobs CFN exposes are wired; anything
/// not recognised becomes a bare action with no target.
fn parse_elb_actions(value: Option<&serde_json::Value>) -> Vec<ElbAction> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .map(|a| {
            let action_type = a
                .get("Type")
                .and_then(|v| v.as_str())
                .unwrap_or("forward")
                .to_string();
            let target_group_arn = a
                .get("TargetGroupArn")
                .and_then(|v| v.as_str())
                .map(|s| s.to_string());
            let order = a.get("Order").and_then(|v| v.as_i64()).map(|n| n as i32);
            let redirect = a
                .get("RedirectConfig")
                .map(|r| fakecloud_elbv2::RedirectConfig {
                    protocol: r
                        .get("Protocol")
                        .and_then(|v| v.as_str())
                        .map(|s| s.to_string()),
                    port: r
                        .get("Port")
                        .and_then(|v| v.as_str())
                        .map(|s| s.to_string()),
                    host: r
                        .get("Host")
                        .and_then(|v| v.as_str())
                        .map(|s| s.to_string()),
                    path: r
                        .get("Path")
                        .and_then(|v| v.as_str())
                        .map(|s| s.to_string()),
                    query: r
                        .get("Query")
                        .and_then(|v| v.as_str())
                        .map(|s| s.to_string()),
                    status_code: r
                        .get("StatusCode")
                        .and_then(|v| v.as_str())
                        .unwrap_or("HTTP_302")
                        .to_string(),
                });
            let fixed_response =
                a.get("FixedResponseConfig")
                    .map(|f| fakecloud_elbv2::FixedResponseConfig {
                        message_body: f
                            .get("MessageBody")
                            .and_then(|v| v.as_str())
                            .map(|s| s.to_string()),
                        status_code: f
                            .get("StatusCode")
                            .and_then(|v| v.as_str())
                            .unwrap_or("200")
                            .to_string(),
                        content_type: f
                            .get("ContentType")
                            .and_then(|v| v.as_str())
                            .map(|s| s.to_string()),
                    });
            let forward = a.get("ForwardConfig").map(|f| {
                let target_groups: Vec<TargetGroupTuple> = f
                    .get("TargetGroups")
                    .and_then(|v| v.as_array())
                    .map(|arr| {
                        arr.iter()
                            .filter_map(|t| {
                                let target_group_arn = t
                                    .get("TargetGroupArn")
                                    .and_then(|v| v.as_str())?
                                    .to_string();
                                let weight =
                                    t.get("Weight").and_then(|v| v.as_i64()).map(|n| n as i32);
                                Some(TargetGroupTuple {
                                    target_group_arn,
                                    weight,
                                })
                            })
                            .collect()
                    })
                    .unwrap_or_default();
                fakecloud_elbv2::ForwardConfig {
                    target_groups,
                    stickiness: None,
                }
            });
            ElbAction {
                action_type,
                target_group_arn,
                order,
                redirect,
                fixed_response,
                forward,
                authenticate_cognito: None,
                authenticate_oidc: None,
            }
        })
        .collect()
}

fn parse_elb_rule_conditions(value: Option<&serde_json::Value>) -> Vec<RuleCondition> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .map(|c| {
            let field = c
                .get("Field")
                .and_then(|v| v.as_str())
                .unwrap_or("")
                .to_string();
            let values: Vec<String> = c
                .get("Values")
                .and_then(|v| v.as_array())
                .map(|arr| {
                    arr.iter()
                        .filter_map(|s| s.as_str().map(|s| s.to_string()))
                        .collect()
                })
                .unwrap_or_default();
            let host_header_values: Vec<String> = c
                .get("HostHeaderConfig")
                .and_then(|v| v.get("Values"))
                .and_then(|v| v.as_array())
                .map(|arr| {
                    arr.iter()
                        .filter_map(|s| s.as_str().map(|s| s.to_string()))
                        .collect()
                })
                .unwrap_or_default();
            RuleCondition {
                field,
                values,
                host_header_values,
                path_pattern_values: Vec::new(),
                http_header_name: None,
                http_header_values: Vec::new(),
                query_string_values: Vec::new(),
                http_request_method_values: Vec::new(),
                source_ip_values: Vec::new(),
            }
        })
        .collect()
}

/// Parse the `KeyPolicy` field of an `AWS::KMS::Key` /
/// `AWS::KMS::ReplicaKey` resource. CFN allows either a JSON string or
/// an inline JSON object; we serialize the object form back to a string
/// to match the [`KmsKey.policy`](fakecloud_kms::KmsKey) shape.
fn parse_key_policy(props: &serde_json::Value) -> Option<String> {
    match props.get("KeyPolicy") {
        Some(v) if v.is_string() => Some(v.as_str().unwrap_or("").to_string()),
        Some(v) => Some(serde_json::to_string(v).unwrap_or_default()),
        None => None,
    }
}

/// Parse the `Tags` field common to KMS CFN resources: an array of
/// `{Key, Value}` pairs into a sorted map.
fn parse_tag_list(props: &serde_json::Value) -> BTreeMap<String, String> {
    let mut tags: BTreeMap<String, String> = BTreeMap::new();
    if let Some(arr) = props.get("Tags").and_then(|v| v.as_array()) {
        for t in arr {
            if let (Some(k), Some(v)) = (
                t.get("Key").and_then(|x| x.as_str()),
                t.get("Value").and_then(|x| x.as_str()),
            ) {
                tags.insert(k.to_string(), v.to_string());
            }
        }
    }
    tags
}

/// Parse the `Properties` of an `AWS::KMS::Key` resource into the
/// shared [`fakecloud_kms::provisioner::KeyCreationInput`]. Defaults
/// match AWS: `ENCRYPT_DECRYPT` / `SYMMETRIC_DEFAULT` / `AWS_KMS` /
/// `Enabled=true`. `RotationPeriodInDays`, `PendingWindowInDays`, and
/// `BypassPolicyLockoutSafetyCheck` are accepted by the parser for
/// CFN compatibility but not persisted on the key — the underlying
/// KMS state doesn't model per-key rotation periods, and the deletion
/// window only matters at scheduled-deletion time which CFN delete
/// short-circuits.
fn parse_kms_key_input(props: &serde_json::Value) -> kms_provisioner::KeyCreationInput {
    kms_provisioner::KeyCreationInput {
        description: props
            .get("Description")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string(),
        key_usage: props
            .get("KeyUsage")
            .and_then(|v| v.as_str())
            .unwrap_or("ENCRYPT_DECRYPT")
            .to_string(),
        key_spec: props
            .get("KeySpec")
            .and_then(|v| v.as_str())
            .unwrap_or("SYMMETRIC_DEFAULT")
            .to_string(),
        origin: props
            .get("Origin")
            .and_then(|v| v.as_str())
            .unwrap_or("AWS_KMS")
            .to_string(),
        enabled: props
            .get("Enabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(true),
        multi_region: props
            .get("MultiRegion")
            .and_then(|v| v.as_bool())
            .unwrap_or(false),
        key_rotation_enabled: props
            .get("EnableKeyRotation")
            .and_then(|v| v.as_bool())
            .unwrap_or(false),
        policy: parse_key_policy(props),
        tags: parse_tag_list(props),
    }
}

/// `LogGroupName` properties on Logs CFN resources may carry either a
/// log-group ARN (when they come from `{Ref: SomeLogGroup}` in the same
/// template) or a plain name. Extract the name in either case.
fn parse_log_group_name(input: &str) -> String {
    if let Some(rest) = input.strip_prefix("arn:aws:logs:") {
        if let Some(after) = rest.split(":log-group:").nth(1) {
            // ARN ends with `:*`; trim it if present.
            return after.trim_end_matches(":*").to_string();
        }
    }
    input.to_string()
}

/// Pull the bare function name out of any shape AWS accepts for a Lambda
/// `FunctionName`: a name, a partial ARN, or a full ARN — each optionally
/// `:qualified` with an alias or version. CFN feeds this `{Ref: SomeFunction}`
/// (resolves to a name, or — for an alias — the alias ARN), `{Fn::GetAtt:
/// [F, Arn]}` (full ARN), or a literal; all shapes must land at the same map
/// key. Function names cannot contain `:`, so any trailing `:segment` on a
/// non-ARN input is always a qualifier.
fn parse_lambda_function_name(input: &str) -> String {
    // Full ARN: arn:aws:lambda:region:account:function:name[:qualifier]
    if let Some(rest) = input.strip_prefix("arn:aws:lambda:") {
        if let Some(after) = rest.split(":function:").nth(1) {
            return after.split(':').next().unwrap_or(after).to_string();
        }
    }
    // Partial ARN: account:function:name[:qualifier]
    if let Some(after) = input.split(":function:").nth(1) {
        return after.split(':').next().unwrap_or(after).to_string();
    }
    // Bare name, optionally qualified: name[:qualifier]
    input.split(':').next().unwrap_or(input).to_string()
}

/// Recover the internal `{function}:{alias}` key used by the lambda
/// state's `aliases` / `provisioned_concurrency` maps from an alias
/// resource's physical id. The physical id is the alias ARN
/// (`arn:aws:lambda:region:account:function:name:alias`); a legacy bare
/// `name:alias` value is returned unchanged.
fn alias_state_key(physical_id: &str) -> String {
    if let Some(rest) = physical_id.strip_prefix("arn:aws:lambda:") {
        if let Some(after) = rest.split(":function:").nth(1) {
            return after.to_string();
        }
    }
    physical_id.to_string()
}

/// All AWS::Lambda::Function CFN properties parsed and pre-defaulted into
/// their lambda-state shapes. Mirrors the lambda service's
/// `CreateFunctionInput` so create + update share one parse path.
struct LambdaFunctionProps {
    runtime: String,
    role: String,
    handler: String,
    description: String,
    timeout: i64,
    memory_size: i64,
    package_type: String,
    tags: BTreeMap<String, String>,
    environment: BTreeMap<String, String>,
    architectures: Vec<String>,
    /// Decoded `Code.ZipFile` bytes (base64 → raw). `None` when the
    /// caller specified `Code.S3Bucket`/`Code.S3Key` or `Code.ImageUri`
    /// instead — the create/update path resolves S3 separately.
    code_zip: Option<Vec<u8>>,
    s3_bucket: Option<String>,
    s3_key: Option<String>,
    image_uri: Option<String>,
    layers: Vec<String>,
    tracing_mode: Option<String>,
    kms_key_arn: Option<String>,
    ephemeral_storage_size: Option<i64>,
    vpc_config: Option<serde_json::Value>,
    snap_start: Option<serde_json::Value>,
    dead_letter_config_arn: Option<String>,
    file_system_configs: Vec<serde_json::Value>,
    logging_config: Option<serde_json::Value>,
}

/// Parse the `Properties` value of an `AWS::Lambda::Function` resource
/// into a `LambdaFunctionProps`. Defaults match the AWS Lambda
/// CreateFunction API: `python3.12` runtime, `index.handler` handler,
/// `Zip` package type, `x86_64` architecture, 3s timeout, 128MB memory.
fn parse_lambda_function_props(props: &serde_json::Value) -> Result<LambdaFunctionProps, String> {
    let runtime = props
        .get("Runtime")
        .and_then(|v| v.as_str())
        .unwrap_or("python3.12")
        .to_string();
    let role = props
        .get("Role")
        .and_then(|v| v.as_str())
        .unwrap_or_default()
        .to_string();
    let handler = props
        .get("Handler")
        .and_then(|v| v.as_str())
        .unwrap_or("index.handler")
        .to_string();
    let description = props
        .get("Description")
        .and_then(|v| v.as_str())
        .unwrap_or_default()
        .to_string();
    let timeout = props.get("Timeout").and_then(|v| v.as_i64()).unwrap_or(3);
    let memory_size = props
        .get("MemorySize")
        .and_then(|v| v.as_i64())
        .unwrap_or(128);
    let architectures = props
        .get("Architectures")
        .and_then(|v| v.as_array())
        .map(|a| {
            a.iter()
                .filter_map(|v| v.as_str().map(|s| s.to_string()))
                .collect::<Vec<_>>()
        })
        .unwrap_or_else(|| vec!["x86_64".to_string()]);
    let package_type = props
        .get("PackageType")
        .and_then(|v| v.as_str())
        .unwrap_or("Zip")
        .to_string();
    let environment = props
        .get("Environment")
        .and_then(|v| v.get("Variables"))
        .and_then(|v| v.as_object())
        .map(|o| {
            o.iter()
                .filter_map(|(k, v)| v.as_str().map(|s| (k.clone(), s.to_string())))
                .collect::<BTreeMap<String, String>>()
        })
        .unwrap_or_default();

    // CFN tags ride as `[{Key, Value}, ...]`; flatten to the map shape
    // the lambda crate stores tags in.
    let tags: BTreeMap<String, String> = props
        .get("Tags")
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|t| {
                    let k = t.get("Key").and_then(|v| v.as_str())?.to_string();
                    let v = t.get("Value").and_then(|v| v.as_str())?.to_string();
                    Some((k, v))
                })
                .collect()
        })
        .unwrap_or_default();

    let code = props.get("Code");
    // CFN's `Code.ZipFile` is the raw source code inline (per the
    // CloudFormation user guide), not base64 like the Lambda
    // CreateFunction API. We store it as the raw bytes — fakecloud's
    // Lambda runtime is content-agnostic and just needs *some* deployable
    // payload to execute.
    let code_zip = code
        .and_then(|c| c.get("ZipFile"))
        .and_then(|v| v.as_str())
        .map(|s| s.as_bytes().to_vec());
    let s3_bucket = code
        .and_then(|c| c.get("S3Bucket"))
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    let s3_key = code
        .and_then(|c| c.get("S3Key"))
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    // ImageUri is only meaningful for `PackageType=Image`. Mirroring the
    // lambda service path, drop it on Zip functions so GetFunction
    // doesn't return ECR metadata for a ZIP-based function.
    let image_uri = if package_type == "Image" {
        code.and_then(|c| c.get("ImageUri"))
            .and_then(|v| v.as_str())
            .map(|s| s.to_string())
    } else {
        None
    };
    if package_type == "Image" && image_uri.is_none() {
        return Err("Code.ImageUri is required when PackageType is Image".to_string());
    }

    let layers: Vec<String> = props
        .get("Layers")
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|v| v.as_str().map(String::from))
                .collect()
        })
        .unwrap_or_default();

    let tracing_mode = props
        .get("TracingConfig")
        .and_then(|v| v.get("Mode"))
        .and_then(|v| v.as_str())
        .map(String::from);
    let kms_key_arn = props
        .get("KmsKeyArn")
        .and_then(|v| v.as_str())
        .map(String::from);
    let ephemeral_storage_size = props
        .get("EphemeralStorage")
        .and_then(|v| v.get("Size"))
        .and_then(|v| v.as_i64());
    let vpc_config = props.get("VpcConfig").filter(|v| v.is_object()).cloned();
    let snap_start = props.get("SnapStart").filter(|v| v.is_object()).cloned();
    let dead_letter_config_arn = props
        .get("DeadLetterConfig")
        .and_then(|v| v.get("TargetArn"))
        .and_then(|v| v.as_str())
        .map(String::from);
    let file_system_configs = props
        .get("FileSystemConfigs")
        .and_then(|v| v.as_array())
        .cloned()
        .unwrap_or_default();
    let logging_config = props
        .get("LoggingConfig")
        .filter(|v| v.is_object())
        .cloned();

    Ok(LambdaFunctionProps {
        runtime,
        role,
        handler,
        description,
        timeout,
        memory_size,
        package_type,
        tags,
        environment,
        architectures,
        code_zip,
        s3_bucket,
        s3_key,
        image_uri,
        layers,
        tracing_mode,
        kms_key_arn,
        ephemeral_storage_size,
        vpc_config,
        snap_start,
        dead_letter_config_arn,
        file_system_configs,
        logging_config,
    })
}

/// Properties for `AWS::Lambda::EventSourceMapping` shared between the
/// create and update provisioners. Mirrors the lambda crate
/// `EventSourceMapping` shape one-for-one — every CFN-mutable field
/// lands here so update can rewrite without re-parsing.
struct LambdaEventSourceMappingProps {
    event_source_arn: String,
    batch_size: i64,
    enabled: bool,
    starting_position: Option<String>,
    starting_position_timestamp: Option<f64>,
    parallelization_factor: Option<i64>,
    maximum_batching_window_in_seconds: Option<i64>,
    function_response_types: Vec<String>,
    filter_patterns: Vec<String>,
    kms_key_arn: Option<String>,
    metrics_config: Option<serde_json::Value>,
    destination_config: Option<serde_json::Value>,
    maximum_retry_attempts: Option<i64>,
    maximum_record_age_in_seconds: Option<i64>,
    bisect_batch_on_function_error: Option<bool>,
    tumbling_window_in_seconds: Option<i64>,
    topics: Vec<String>,
    queues: Vec<String>,
}

/// Parse the `Properties` value of an `AWS::Lambda::EventSourceMapping`
/// resource. `EventSourceArn` is required on create; updates re-parse but
/// the value is ignored since the field is immutable.
fn parse_lambda_event_source_mapping_props(
    props: &serde_json::Value,
) -> Result<LambdaEventSourceMappingProps, String> {
    let event_source_arn = props
        .get("EventSourceArn")
        .and_then(|v| v.as_str())
        .unwrap_or_default()
        .to_string();
    let batch_size = props
        .get("BatchSize")
        .and_then(|v| v.as_i64())
        .unwrap_or(10);
    let enabled = props
        .get("Enabled")
        .and_then(|v| v.as_bool())
        .unwrap_or(true);
    let starting_position = props
        .get("StartingPosition")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    let starting_position_timestamp = props
        .get("StartingPositionTimestamp")
        .and_then(|v| v.as_f64());
    let parallelization_factor = props.get("ParallelizationFactor").and_then(|v| v.as_i64());
    let maximum_batching_window_in_seconds = props
        .get("MaximumBatchingWindowInSeconds")
        .and_then(|v| v.as_i64());
    let function_response_types: Vec<String> = props
        .get("FunctionResponseTypes")
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|v| v.as_str().map(|s| s.to_string()))
                .collect()
        })
        .unwrap_or_default();
    let filter_patterns: Vec<String> = props
        .get("FilterCriteria")
        .and_then(|v| v.get("Filters"))
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|f| {
                    f.get("Pattern")
                        .and_then(|p| p.as_str())
                        .map(|s| s.to_string())
                })
                .collect()
        })
        .unwrap_or_default();
    let kms_key_arn = props
        .get("KmsKeyArn")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    let metrics_config = props
        .get("MetricsConfig")
        .filter(|v| v.is_object())
        .cloned();
    let destination_config = props
        .get("DestinationConfig")
        .filter(|v| v.is_object())
        .cloned();
    let maximum_retry_attempts = props.get("MaximumRetryAttempts").and_then(|v| v.as_i64());
    let maximum_record_age_in_seconds = props
        .get("MaximumRecordAgeInSeconds")
        .and_then(|v| v.as_i64());
    let bisect_batch_on_function_error = props
        .get("BisectBatchOnFunctionError")
        .and_then(|v| v.as_bool());
    let tumbling_window_in_seconds = props
        .get("TumblingWindowInSeconds")
        .and_then(|v| v.as_i64());
    let topics: Vec<String> = props
        .get("Topics")
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|v| v.as_str().map(|s| s.to_string()))
                .collect()
        })
        .unwrap_or_default();
    let queues: Vec<String> = props
        .get("Queues")
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|v| v.as_str().map(|s| s.to_string()))
                .collect()
        })
        .unwrap_or_default();

    Ok(LambdaEventSourceMappingProps {
        event_source_arn,
        batch_size,
        enabled,
        starting_position,
        starting_position_timestamp,
        parallelization_factor,
        maximum_batching_window_in_seconds,
        function_response_types,
        filter_patterns,
        kms_key_arn,
        metrics_config,
        destination_config,
        maximum_retry_attempts,
        maximum_record_age_in_seconds,
        bisect_batch_on_function_error,
        tumbling_window_in_seconds,
        topics,
        queues,
    })
}

/// Compute base64-encoded SHA-256 of code bytes — matches what the
/// lambda service stores in `LambdaFunction.code_sha256`.
fn sha256_b64(bytes: &[u8]) -> String {
    use sha2::Digest;
    let hash = sha2::Sha256::digest(bytes);
    base64::Engine::encode(&base64::engine::general_purpose::STANDARD, hash)
}

/// Look up the `code_size` for an attached layer-version ARN by walking
/// the in-process lambda state. Falls back to 0 when the ARN is
/// unparseable or the layer/version is unknown — same fallback as the
/// lambda service helper.
fn layer_code_size(
    accounts: &fakecloud_core::multi_account::MultiAccountState<fakecloud_lambda::LambdaState>,
    arn: &str,
) -> i64 {
    // arn:aws:lambda:<region>:<account>:layer:<name>:<version>
    let Some(rest) = arn.strip_prefix("arn:aws:lambda:") else {
        return 0;
    };
    let mut parts = rest.split(':');
    let _region = parts.next();
    let Some(account) = parts.next() else {
        return 0;
    };
    if parts.next() != Some("layer") {
        return 0;
    }
    let Some(name) = parts.next() else {
        return 0;
    };
    let Some(ver_str) = parts.next() else {
        return 0;
    };
    let Ok(ver) = ver_str.parse::<i64>() else {
        return 0;
    };
    accounts
        .get(account)
        .and_then(|s| s.layers.get(name))
        .and_then(|l| l.versions.iter().find(|v| v.version == ver))
        .map(|v| v.code_size)
        .unwrap_or(0)
}

/// What a resource provisioner returns. The physical id is what `Ref` resolves
/// to; `attributes` is what `Fn::GetAtt` resolves to (per-resource-type).
pub struct ProvisionResult {
    pub physical_id: String,
    pub attributes: BTreeMap<String, String>,
}

impl ProvisionResult {
    pub fn new(physical_id: impl Into<String>) -> Self {
        Self {
            physical_id: physical_id.into(),
            attributes: BTreeMap::new(),
        }
    }

    pub fn with(mut self, key: &str, value: impl Into<String>) -> Self {
        self.attributes.insert(key.to_string(), value.into());
        self
    }

    /// Merge another attribute map into this result. Used by update
    /// handlers that delegate to a create handler but need to keep the
    /// existing physical id while inheriting the freshly computed
    /// attributes.
    pub fn merge_attributes(mut self, other: BTreeMap<String, String>) -> Self {
        for (k, v) in other {
            self.attributes.insert(k, v);
        }
        self
    }
}

/// Extract a resource policy's `PolicyDocument` property as a JSON string,
/// accepting either an inline object or an already-serialized string. Shared by
/// the SQS/SNS/S3 resource-policy provisioners.
fn policy_document_string(props: &serde_json::Value) -> Result<String, String> {
    match props.get("PolicyDocument") {
        Some(serde_json::Value::String(s)) => Ok(s.clone()),
        Some(other) => Ok(other.to_string()),
        None => Err("PolicyDocument is required".to_string()),
    }
}

/// Holds references to all service states so CloudFormation can provision resources.
pub struct ResourceProvisioner {
    pub sqs_state: SharedSqsState,
    pub sns_state: SharedSnsState,
    pub ssm_state: SharedSsmState,
    pub iam_state: SharedIamState,
    pub s3_state: SharedS3State,
    pub eventbridge_state: SharedEventBridgeState,
    pub dynamodb_state: SharedDynamoDbState,
    pub logs_state: SharedLogsState,
    pub lambda_state: SharedLambdaState,
    pub secretsmanager_state: SharedSecretsManagerState,
    pub kinesis_state: SharedKinesisState,
    pub kms_state: SharedKmsState,
    pub ecr_state: SharedEcrState,
    pub cloudwatch_state: SharedCloudWatchState,
    pub elbv2_state: SharedElbv2State,
    pub organizations_state: SharedOrganizationsState,
    pub cognito_state: SharedCognitoState,
    pub rds_state: SharedRdsState,
    pub ec2_state: fakecloud_ec2::SharedEc2State,
    pub autoscaling_state: fakecloud_autoscaling::SharedAutoScalingState,
    pub batch_state: fakecloud_batch::SharedBatchState,
    pub ecs_state: SharedEcsState,
    pub acm_state: SharedAcmState,
    pub elasticache_state: SharedElastiCacheState,
    pub route53_state: SharedRoute53State,
    pub cloudfront_state: SharedCloudFrontState,
    pub stepfunctions_state: SharedStepFunctionsState,
    pub wafv2_state: SharedWafv2State,
    pub apigateway_state: SharedApiGatewayState,
    pub apigatewayv2_state: SharedApiGatewayV2State,
    pub ses_state: SharedSesState,
    pub app_autoscaling_state: AppasState,
    pub athena_state: SharedAthenaState,
    pub firehose_state: fakecloud_firehose::SharedFirehoseState,
    pub glue_state: fakecloud_glue::SharedGlueState,
    pub cloudformation_state: SharedCloudFormationState,
    pub delivery: Arc<DeliveryBus>,
    /// Lambda container runtime for pre-pulling CFN-provisioned function
    /// images (see `CloudFormationDeps::lambda_runtime`). `None` outside a
    /// configured runtime (e.g. unit tests).
    pub lambda_runtime: Option<Arc<fakecloud_lambda::runtime::ContainerRuntime>>,
    /// Fine-grained S3 disk store. Bucket create/delete (and bucket-policy
    /// updates) write through this so a CFN-provisioned bucket lands on disk,
    /// matching the real `CreateBucket`/`DeleteBucket` handlers. A
    /// `MemoryS3Store` (memory mode) makes the writes no-ops.
    pub s3_store: Arc<dyn S3Store>,
    pub account_id: String,
    pub region: String,
    pub stack_id: String,
}

mod acm;
mod apigw;
mod apigwv2;
mod athena;
mod autoscaling;
mod batch;
mod cloudformation;
mod cloudwatch;
mod cognito;
mod dynamodb;
mod ec2;
mod ecr;
mod ecs;
mod eventbridge;
mod firehose;
mod glue;
mod iam;
mod kinesis;
mod kms;
mod lambda;
mod logs;
mod rds;
mod route;
mod s3;
mod secrets;
mod ses;
mod sns;
mod sqs;
mod ssm;
mod stepfunctions;
mod wafv2;

impl ResourceProvisioner {
    /// Create a resource and return the StackResource with physical ID.
    pub fn create_resource(&self, resource: &ResourceDefinition) -> Result<StackResource, String> {
        let result = match resource.resource_type.as_str() {
            "AWS::SQS::Queue" => self.create_sqs_queue(resource),
            "AWS::SQS::QueuePolicy" => self.create_sqs_queue_policy(resource),
            "AWS::SNS::Topic" => self.create_sns_topic(resource),
            "AWS::SNS::TopicPolicy" => self.create_sns_topic_policy(resource),
            "AWS::SNS::Subscription" => self.create_sns_subscription(resource),
            "AWS::SSM::Parameter" => self.create_ssm_parameter(resource),
            "AWS::IAM::Role" => self.create_iam_role(resource),
            "AWS::IAM::Policy" => self.create_iam_policy(resource),
            "AWS::IAM::User" => self.create_iam_user(resource),
            "AWS::IAM::Group" => self.create_iam_group(resource),
            "AWS::IAM::ManagedPolicy" => self.create_iam_managed_policy(resource),
            "AWS::IAM::UserToGroupAddition" => self.create_iam_user_to_group_addition(resource),
            "AWS::IAM::AccessKey" => self.create_iam_access_key(resource),
            "AWS::IAM::InstanceProfile" => self.create_iam_instance_profile(resource),
            "AWS::IAM::OIDCProvider" => self.create_iam_oidc_provider(resource),
            "AWS::IAM::SAMLProvider" => self.create_iam_saml_provider(resource),
            "AWS::IAM::ServiceLinkedRole" => self.create_iam_service_linked_role(resource),
            "AWS::IAM::VirtualMFADevice" => self.create_iam_virtual_mfa_device(resource),
            "AWS::S3::Bucket" => self.create_s3_bucket(resource),
            "AWS::S3::BucketPolicy" => self.create_s3_bucket_policy(resource),
            "AWS::Events::Rule" => self.create_eventbridge_rule(resource),
            "AWS::Events::Connection" => self.create_eventbridge_connection(resource),
            "AWS::Events::ApiDestination" => self.create_eventbridge_api_destination(resource),
            "AWS::Events::Archive" => self.create_eventbridge_archive(resource),
            "AWS::Events::EventBus" => self.create_eventbridge_event_bus(resource),
            "AWS::Events::EventBusPolicy" => self.create_eventbridge_event_bus_policy(resource),
            "AWS::Events::Endpoint" => self.create_eventbridge_endpoint(resource),
            "AWS::DynamoDB::Table" => self.create_dynamodb_table(resource),
            "AWS::Logs::LogGroup" => self.create_log_group(resource),
            "AWS::Logs::LogStream" => self.create_log_stream(resource),
            "AWS::Logs::MetricFilter" => self.create_metric_filter(resource),
            "AWS::Logs::SubscriptionFilter" => self.create_subscription_filter(resource),
            "AWS::Logs::Destination" => self.create_logs_destination(resource),
            "AWS::Logs::ResourcePolicy" => self.create_logs_resource_policy(resource),
            "AWS::Logs::QueryDefinition" => self.create_logs_query_definition(resource),
            "AWS::Logs::Delivery" => self.create_logs_delivery(resource),
            "AWS::Logs::DeliveryDestination" => self.create_logs_delivery_destination(resource),
            "AWS::Logs::DeliverySource" => self.create_logs_delivery_source(resource),
            "AWS::Lambda::Function" => self.create_lambda_function(resource),
            "AWS::Lambda::Permission" => self.create_lambda_permission(resource),
            "AWS::Lambda::EventSourceMapping" => self.create_lambda_event_source_mapping(resource),
            "AWS::Lambda::LayerVersion" => self.create_lambda_layer_version(resource),
            "AWS::Lambda::Url" => self.create_lambda_url(resource),
            "AWS::Lambda::Alias" => self.create_lambda_alias(resource),
            "AWS::Lambda::Version" => self.create_lambda_version(resource),
            "AWS::SecretsManager::Secret" => self.create_secrets_manager_secret(resource),
            "AWS::Kinesis::Stream" => self.create_kinesis_stream(resource),
            "AWS::Kinesis::StreamConsumer" => self.create_kinesis_stream_consumer(resource),
            "AWS::KMS::Key" => self.create_kms_key(resource),
            "AWS::KMS::Alias" => self.create_kms_alias(resource),
            "AWS::KMS::ReplicaKey" => self.create_kms_replica_key(resource),
            "AWS::ECR::Repository" => self.create_ecr_repository(resource),
            "AWS::ECR::RepositoryPolicy" => self.create_ecr_repository_policy(resource),
            "AWS::ECR::LifecyclePolicy" => self.create_ecr_lifecycle_policy(resource),
            "AWS::ECR::RegistryPolicy" => self.create_ecr_registry_policy(resource),
            "AWS::ECR::ReplicationConfiguration" => {
                self.create_ecr_replication_configuration(resource)
            }
            "AWS::ECR::RegistryScanningConfiguration" => {
                self.create_ecr_registry_scanning_configuration(resource)
            }
            "AWS::ECR::PullThroughCacheRule" => self.create_ecr_pull_through_cache_rule(resource),
            "AWS::CloudWatch::Alarm" => self.create_cloudwatch_alarm(resource),
            "AWS::CloudWatch::Dashboard" => self.create_cloudwatch_dashboard(resource),
            "AWS::ElasticLoadBalancingV2::LoadBalancer" => {
                self.create_elbv2_load_balancer(resource)
            }
            "AWS::ElasticLoadBalancingV2::TargetGroup" => self.create_elbv2_target_group(resource),
            "AWS::ElasticLoadBalancingV2::Listener" => self.create_elbv2_listener(resource),
            "AWS::ElasticLoadBalancingV2::ListenerRule" => {
                self.create_elbv2_listener_rule(resource)
            }
            "AWS::ElasticLoadBalancingV2::ListenerCertificate" => {
                self.create_elbv2_listener_certificate(resource)
            }
            "AWS::ElasticLoadBalancingV2::TrustStore" => self.create_elbv2_trust_store(resource),
            "AWS::Organizations::Organization" => self.create_organization(resource),
            "AWS::Organizations::OrganizationalUnit" => self.create_organization_unit(resource),
            "AWS::Organizations::Account" => self.create_organization_account(resource),
            "AWS::Organizations::Policy" => self.create_organization_policy(resource),
            "AWS::Organizations::ResourcePolicy" => {
                self.create_organization_resource_policy(resource)
            }
            "AWS::Cognito::UserPool" => self.create_cognito_user_pool(resource),
            "AWS::Cognito::UserPoolClient" => self.create_cognito_user_pool_client(resource),
            "AWS::Cognito::UserPoolDomain" => self.create_cognito_user_pool_domain(resource),
            "AWS::Cognito::IdentityPool" => self.create_cognito_identity_pool(resource),
            "AWS::Cognito::IdentityPoolRoleAttachment" => {
                self.create_cognito_identity_pool_role_attachment(resource)
            }
            "AWS::RDS::DBSubnetGroup" => self.create_rds_subnet_group(resource),
            "AWS::RDS::DBParameterGroup" => self.create_rds_parameter_group(resource),
            "AWS::RDS::DBClusterParameterGroup" => {
                self.create_rds_cluster_parameter_group(resource)
            }
            "AWS::RDS::OptionGroup" => self.create_rds_option_group(resource),
            "AWS::RDS::EventSubscription" => self.create_rds_event_subscription(resource),
            "AWS::RDS::DBSecurityGroup" => self.create_rds_security_group(resource),
            "AWS::RDS::DBProxy" => self.create_rds_db_proxy(resource),
            "AWS::RDS::DBInstance" => self.create_rds_db_instance(resource),
            "AWS::RDS::DBCluster" => self.create_rds_db_cluster(resource),
            "AWS::AutoScaling::LaunchConfiguration" => {
                self.create_autoscaling_launch_configuration(resource)
            }
            "AWS::AutoScaling::AutoScalingGroup" => self.create_autoscaling_group(resource),
            "AWS::Batch::ComputeEnvironment" => self.create_batch_compute_environment(resource),
            "AWS::Batch::JobQueue" => self.create_batch_job_queue(resource),
            "AWS::Batch::JobDefinition" => self.create_batch_job_definition(resource),
            "AWS::Batch::SchedulingPolicy" => self.create_batch_scheduling_policy(resource),
            "AWS::EC2::VPC" => self.create_ec2_vpc(resource),
            "AWS::EC2::Subnet" => self.create_ec2_subnet(resource),
            "AWS::EC2::SecurityGroup" => self.create_ec2_security_group(resource),
            "AWS::EC2::InternetGateway" => self.create_ec2_internet_gateway(resource),
            "AWS::EC2::RouteTable" => self.create_ec2_route_table(resource),
            "AWS::ECS::Cluster" => self.create_ecs_cluster(resource),
            "AWS::ECS::TaskDefinition" => self.create_ecs_task_definition(resource),
            "AWS::ECS::Service" => self.create_ecs_service(resource),
            "AWS::ECS::CapacityProvider" => self.create_ecs_capacity_provider(resource),
            "AWS::CertificateManager::Certificate" => self.create_acm_certificate(resource),
            "AWS::CertificateManager::Account" => self.create_acm_account(resource),
            "AWS::ElastiCache::ParameterGroup" => self.create_ec_parameter_group(resource),
            "AWS::ElastiCache::SubnetGroup" => self.create_ec_subnet_group(resource),
            "AWS::ElastiCache::SecurityGroup" => self.create_ec_security_group(resource),
            "AWS::ElastiCache::User" => self.create_ec_user(resource),
            "AWS::ElastiCache::UserGroup" => self.create_ec_user_group(resource),
            "AWS::ElastiCache::CacheCluster" => self.create_ec_cache_cluster(resource),
            "AWS::ElastiCache::ReplicationGroup" => self.create_ec_replication_group(resource),
            "AWS::Route53::HostedZone" => self.create_route53_hosted_zone(resource),
            "AWS::Route53::RecordSet" => self.create_route53_record_set(resource),
            "AWS::Route53::HealthCheck" => self.create_route53_health_check(resource),
            "AWS::Route53::DNSSEC" => self.create_route53_dnssec(resource),
            "AWS::Route53::KeySigningKey" => self.create_route53_key_signing_key(resource),
            "AWS::CloudFront::CloudFrontOriginAccessIdentity" => {
                self.create_cf_origin_access_identity(resource)
            }
            "AWS::CloudFront::Distribution" => self.create_cf_distribution(resource),
            "AWS::CloudFront::OriginAccessControl" => {
                self.create_cf_origin_access_control(resource)
            }
            "AWS::CloudFront::PublicKey" => self.create_cf_public_key(resource),
            "AWS::CloudFront::KeyGroup" => self.create_cf_key_group(resource),
            "AWS::CloudFront::Function" => self.create_cf_function(resource),
            "AWS::CloudFront::CachePolicy" => self.create_cf_cache_policy(resource),
            "AWS::CloudFront::OriginRequestPolicy" => {
                self.create_cf_origin_request_policy(resource)
            }
            "AWS::CloudFront::ResponseHeadersPolicy" => {
                self.create_cf_response_headers_policy(resource)
            }
            "AWS::StepFunctions::StateMachine" => self.create_sfn_state_machine(resource),
            "AWS::StepFunctions::Activity" => self.create_sfn_activity(resource),
            "AWS::StepFunctions::StateMachineVersion" => self.create_sfn_version(resource),
            "AWS::StepFunctions::StateMachineAlias" => self.create_sfn_alias(resource),
            "AWS::WAFv2::WebACL" => self.create_wafv2_web_acl(resource),
            "AWS::WAFv2::IPSet" => self.create_wafv2_ip_set(resource),
            "AWS::WAFv2::RegexPatternSet" => self.create_wafv2_regex_pattern_set(resource),
            "AWS::WAFv2::RuleGroup" => self.create_wafv2_rule_group(resource),
            "AWS::WAFv2::LoggingConfiguration" => self.create_wafv2_logging_configuration(resource),
            "AWS::WAFv2::WebACLAssociation" => self.create_wafv2_web_acl_association(resource),
            "AWS::ApiGateway::RestApi" => self.create_apigw_rest_api(resource),
            "AWS::ApiGateway::Resource" => self.create_apigw_resource(resource),
            "AWS::ApiGateway::Method" => self.create_apigw_method(resource),
            "AWS::ApiGateway::Deployment" => self.create_apigw_deployment(resource),
            "AWS::ApiGateway::Stage" => self.create_apigw_stage(resource),
            "AWS::ApiGateway::Authorizer" => self.create_apigw_authorizer(resource),
            "AWS::ApiGateway::RequestValidator" => self.create_apigw_request_validator(resource),
            "AWS::ApiGateway::Model" => self.create_apigw_model(resource),
            "AWS::ApiGateway::GatewayResponse" => self.create_apigw_gateway_response(resource),
            "AWS::ApiGateway::UsagePlan" => self.create_apigw_usage_plan(resource),
            "AWS::ApiGateway::ApiKey" => self.create_apigw_api_key(resource),
            "AWS::ApiGateway::UsagePlanKey" => self.create_apigw_usage_plan_key(resource),
            "AWS::ApiGateway::DomainName" => self.create_apigw_domain_name(resource),
            "AWS::ApiGateway::BasePathMapping" => self.create_apigw_base_path_mapping(resource),
            "AWS::ApiGatewayV2::Api" => self.create_apigwv2_api(resource),
            "AWS::ApiGatewayV2::Route" => self.create_apigwv2_route(resource),
            "AWS::ApiGatewayV2::Integration" => self.create_apigwv2_integration(resource),
            "AWS::ApiGatewayV2::IntegrationResponse" => {
                self.create_apigwv2_integration_response(resource)
            }
            "AWS::ApiGatewayV2::RouteResponse" => self.create_apigwv2_route_response(resource),
            "AWS::ApiGatewayV2::Stage" => self.create_apigwv2_stage(resource),
            "AWS::ApiGatewayV2::Deployment" => self.create_apigwv2_deployment(resource),
            "AWS::ApiGatewayV2::Authorizer" => self.create_apigwv2_authorizer(resource),
            "AWS::ApiGatewayV2::DomainName" => self.create_apigwv2_domain_name(resource),
            "AWS::ApiGatewayV2::ApiMapping" => self.create_apigwv2_api_mapping(resource),
            "AWS::ApiGatewayV2::VpcLink" => self.create_apigwv2_vpc_link(resource),
            "AWS::ApiGatewayV2::Model" => self.create_apigwv2_model(resource),
            "AWS::SES::ConfigurationSet" => self.create_ses_configuration_set(resource),
            "AWS::SES::ConfigurationSetEventDestination" => {
                self.create_ses_event_destination(resource)
            }
            "AWS::SES::EmailIdentity" => self.create_ses_email_identity(resource),
            "AWS::SES::Template" => self.create_ses_template(resource),
            "AWS::SES::ContactList" => self.create_ses_contact_list(resource),
            "AWS::SES::DedicatedIpPool" => self.create_ses_dedicated_ip_pool(resource),
            "AWS::SES::ReceiptRule" => self.create_ses_receipt_rule(resource),
            "AWS::SES::ReceiptRuleSet" => self.create_ses_receipt_rule_set(resource),
            "AWS::SES::ReceiptFilter" => self.create_ses_receipt_filter(resource),
            "AWS::SES::VdmAttributes" => self.create_ses_vdm_attributes(resource),
            "AWS::SecretsManager::RotationSchedule" => {
                self.create_secrets_manager_rotation_schedule(resource)
            }
            "AWS::SecretsManager::ResourcePolicy" => {
                self.create_secrets_manager_resource_policy(resource)
            }
            "AWS::SecretsManager::SecretTargetAttachment" => {
                self.create_secrets_manager_target_attachment(resource)
            }
            "AWS::ApplicationAutoScaling::ScalableTarget" => {
                self.create_application_autoscaling_scalable_target(resource)
            }
            "AWS::ApplicationAutoScaling::ScalingPolicy" => {
                self.create_application_autoscaling_scaling_policy(resource)
            }
            "AWS::Athena::DataCatalog" => self.create_athena_data_catalog(resource),
            "AWS::Athena::NamedQuery" => self.create_athena_named_query(resource),
            "AWS::Athena::WorkGroup" => self.create_athena_work_group(resource),
            "AWS::Athena::PreparedStatement" => self.create_athena_prepared_statement(resource),
            "AWS::KinesisFirehose::DeliveryStream" => {
                self.create_firehose_delivery_stream(resource)
            }
            "AWS::Glue::Database" => self.create_glue_database(resource),
            "AWS::CloudFormation::Stack" => self.create_cloudformation_stack(resource),
            "AWS::Glue::Table" => self.create_glue_table(resource),
            "AWS::Glue::Partition" => self.create_glue_partition(resource),
            t if t.starts_with("Custom::") || t == "AWS::CloudFormation::CustomResource" => self
                .create_custom_resource(resource)
                .map(ProvisionResult::new),
            other => {
                // No provisioner for this type. Real CloudFormation provisions
                // many resource types fakecloud doesn't model, and SAM/CDK
                // output routinely includes ones like
                // `AWS::CloudFormation::WaitConditionHandle`; failing the whole
                // stack on each would block otherwise-valid templates. Match the
                // documented contract (docs/services/cloudformation.md): accept
                // and record the resource as provisioned with no backing state.
                // Dependent operations that need real state may still fail —
                // that is the honest outcome. The physical id is the logical id
                // so `Ref` on the resource resolves to a stable value.
                tracing::warn!(
                    resource_type = %other,
                    logical_id = %resource.logical_id,
                    "CloudFormation: no provisioner for resource type; recording it as provisioned with no backing state"
                );
                Ok(ProvisionResult::new(resource.logical_id.clone()))
            }
        };

        let is_custom = resource.resource_type.starts_with("Custom::")
            || resource.resource_type == "AWS::CloudFormation::CustomResource";
        let service_token = if is_custom {
            resource
                .properties
                .get("ServiceToken")
                .and_then(|v| v.as_str())
                .map(|s| s.to_string())
        } else {
            None
        };

        result.map(|res| StackResource {
            logical_id: resource.logical_id.clone(),
            physical_id: res.physical_id,
            resource_type: resource.resource_type.clone(),
            status: "CREATE_COMPLETE".to_string(),
            service_token,
            attributes: res.attributes,
        })
    }

    /// Apply a property update to an existing stack resource. Returns
    /// `Ok(Some(updated))` when the resource type supports in-place updates
    /// (the caller swaps the resulting `StackResource` for the old one) or
    /// `Ok(None)` when the type has no update path defined (the caller
    /// leaves the existing resource alone). `Err` propagates a
    /// resource-level failure up to the stack-level UPDATE_FAILED status.
    pub fn update_resource(
        &self,
        existing: &StackResource,
        new_def: &ResourceDefinition,
    ) -> Result<Option<StackResource>, String> {
        let result = match new_def.resource_type.as_str() {
            "AWS::Lambda::Function" => Some(self.update_lambda_function(existing, new_def)?),
            "AWS::Lambda::Permission" => Some(self.update_lambda_permission(existing, new_def)?),
            "AWS::Lambda::EventSourceMapping" => {
                Some(self.update_lambda_event_source_mapping(existing, new_def)?)
            }
            "AWS::Lambda::LayerVersion" => {
                Some(self.update_lambda_layer_version(existing, new_def)?)
            }
            "AWS::Lambda::Url" => Some(self.update_lambda_url(existing, new_def)?),
            "AWS::Lambda::Alias" => Some(self.update_lambda_alias(existing, new_def)?),
            "AWS::Lambda::Version" => Some(self.update_lambda_version(existing, new_def)?),
            "AWS::IAM::Role" => Some(self.update_iam_role(existing, new_def)?),
            "AWS::IAM::Policy" => Some(self.update_iam_policy(existing, new_def)?),
            "AWS::IAM::ManagedPolicy" => Some(self.update_iam_policy(existing, new_def)?),
            "AWS::ApiGateway::RestApi" => Some(self.update_apigw_rest_api(existing, new_def)?),
            "AWS::ApiGateway::Resource" => Some(self.update_apigw_resource(existing, new_def)?),
            "AWS::ApiGateway::Method" => Some(self.update_apigw_method(existing, new_def)?),
            "AWS::ApiGateway::Deployment" => Some(self.update_apigw_deployment(existing, new_def)?),
            "AWS::ApiGateway::Stage" => Some(self.update_apigw_stage(existing, new_def)?),
            "AWS::ApiGateway::Authorizer" => Some(self.update_apigw_authorizer(existing, new_def)?),
            "AWS::ApiGateway::RequestValidator" => {
                Some(self.update_apigw_request_validator(existing, new_def)?)
            }
            "AWS::ApiGateway::Model" => Some(self.update_apigw_model(existing, new_def)?),
            "AWS::ApiGateway::GatewayResponse" => {
                Some(self.update_apigw_gateway_response(existing, new_def)?)
            }
            "AWS::ApiGateway::UsagePlan" => Some(self.update_apigw_usage_plan(existing, new_def)?),
            "AWS::ApiGateway::ApiKey" => Some(self.update_apigw_api_key(existing, new_def)?),
            "AWS::ApiGateway::UsagePlanKey" => {
                Some(self.update_apigw_usage_plan_key(existing, new_def)?)
            }
            "AWS::ApiGateway::DomainName" => {
                Some(self.update_apigw_domain_name(existing, new_def)?)
            }
            "AWS::ApiGateway::BasePathMapping" => {
                Some(self.update_apigw_base_path_mapping(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::Api" => Some(self.update_apigwv2_api(existing, new_def)?),
            "AWS::ApiGatewayV2::Route" => Some(self.update_apigwv2_route(existing, new_def)?),
            "AWS::ApiGatewayV2::Integration" => {
                Some(self.update_apigwv2_integration(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::IntegrationResponse" => {
                Some(self.update_apigwv2_integration_response(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::RouteResponse" => {
                Some(self.update_apigwv2_route_response(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::Stage" => Some(self.update_apigwv2_stage(existing, new_def)?),
            "AWS::ApiGatewayV2::Deployment" => {
                Some(self.update_apigwv2_deployment(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::Authorizer" => {
                Some(self.update_apigwv2_authorizer(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::DomainName" => {
                Some(self.update_apigwv2_domain_name(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::ApiMapping" => {
                Some(self.update_apigwv2_api_mapping(existing, new_def)?)
            }
            "AWS::ApiGatewayV2::VpcLink" => Some(self.update_apigwv2_vpc_link(existing, new_def)?),
            "AWS::ApiGatewayV2::Model" => Some(self.update_apigwv2_model(existing, new_def)?),
            "AWS::ECS::Cluster" => Some(self.update_ecs_cluster(existing, new_def)?),
            "AWS::ECS::Service" => Some(self.update_ecs_service(existing, new_def)?),
            "AWS::ECS::TaskDefinition" => Some(self.update_ecs_task_definition(existing, new_def)?),
            "AWS::ECS::CapacityProvider" => {
                Some(self.update_ecs_capacity_provider(existing, new_def)?)
            }
            "AWS::ECR::Repository" => Some(self.update_ecr_repository(existing, new_def)?),
            "AWS::ECR::RepositoryPolicy" => {
                Some(self.update_ecr_repository_policy(existing, new_def)?)
            }
            "AWS::ECR::LifecyclePolicy" => {
                Some(self.update_ecr_lifecycle_policy(existing, new_def)?)
            }
            "AWS::ECR::RegistryPolicy" => Some(self.update_ecr_registry_policy(existing, new_def)?),
            "AWS::ECR::ReplicationConfiguration" => {
                Some(self.update_ecr_replication_configuration(existing, new_def)?)
            }
            "AWS::ECR::RegistryScanningConfiguration" => {
                Some(self.update_ecr_registry_scanning_configuration(existing, new_def)?)
            }
            "AWS::ECR::PullThroughCacheRule" => {
                Some(self.update_ecr_pull_through_cache_rule(existing, new_def)?)
            }
            "AWS::KMS::Key" => Some(self.update_kms_key(existing, new_def)?),
            "AWS::KMS::ReplicaKey" => Some(self.update_kms_replica_key(existing, new_def)?),
            "AWS::KMS::Alias" => Some(self.update_kms_alias(existing, new_def)?),
            "AWS::ElasticLoadBalancingV2::LoadBalancer" => {
                Some(self.update_elbv2_load_balancer(existing, new_def)?)
            }
            "AWS::ElasticLoadBalancingV2::TargetGroup" => {
                Some(self.update_elbv2_target_group(existing, new_def)?)
            }
            "AWS::ElasticLoadBalancingV2::Listener" => {
                Some(self.update_elbv2_listener(existing, new_def)?)
            }
            "AWS::ElasticLoadBalancingV2::ListenerRule" => {
                Some(self.update_elbv2_listener_rule(existing, new_def)?)
            }
            "AWS::ElasticLoadBalancingV2::ListenerCertificate" => {
                Some(self.update_elbv2_listener_certificate(existing, new_def)?)
            }
            "AWS::ElasticLoadBalancingV2::TrustStore" => {
                Some(self.update_elbv2_trust_store(existing, new_def)?)
            }
            "AWS::CloudWatch::Alarm" => Some(self.update_cloudwatch_alarm(existing, new_def)?),
            "AWS::CloudWatch::Dashboard" => {
                Some(self.update_cloudwatch_dashboard(existing, new_def)?)
            }
            "AWS::StepFunctions::StateMachine" => {
                Some(self.update_sfn_state_machine(existing, new_def)?)
            }
            "AWS::SQS::Queue" => Some(self.update_sqs_queue(existing, new_def)?),
            "AWS::SQS::QueuePolicy" => Some(self.update_sqs_queue_policy(existing, new_def)?),
            "AWS::SNS::Topic" => Some(self.update_sns_topic(existing, new_def)?),
            "AWS::SNS::TopicPolicy" => Some(self.update_sns_topic_policy(existing, new_def)?),
            "AWS::S3::BucketPolicy" => Some(self.update_s3_bucket_policy(existing, new_def)?),
            _ => None,
        };

        Ok(result.map(|res| StackResource {
            logical_id: existing.logical_id.clone(),
            physical_id: res.physical_id,
            resource_type: existing.resource_type.clone(),
            status: "UPDATE_COMPLETE".to_string(),
            service_token: existing.service_token.clone(),
            attributes: res.attributes,
        }))
    }

    /// Resolve a `Fn::GetAtt` against a previously provisioned resource.
    /// Returns the attribute value as a string, or `None` if the resource
    /// type doesn't expose that attribute (caller falls back to a placeholder
    /// so multi-pass provisioning can retry).
    ///
    /// The lookup first checks attributes captured at create time on the
    /// `StackResource`, then falls back to live service-state queries for
    /// the well-known attribute names of each resource type. This means
    /// attributes that change after creation (e.g. Lambda `FunctionUrl`)
    /// resolve correctly even when the URL was added in a separate pass.
    pub fn get_att(&self, resource: &StackResource, attribute: &str) -> Option<String> {
        // Captured attributes are the source of truth — they were computed
        // at create time and never go stale for the resources we ship today.
        if let Some(v) = resource.attributes.get(attribute) {
            return Some(v.clone());
        }
        // Live-state fallback for attributes that aren't pre-captured. This
        // is the extension point for future provisioners.
        match resource.resource_type.as_str() {
            "AWS::S3::Bucket" => self.get_att_s3_bucket(&resource.physical_id, attribute),
            "AWS::Lambda::Function" => {
                self.get_att_lambda_function(&resource.physical_id, attribute)
            }
            "AWS::IAM::Role" => self.get_att_iam_role(&resource.physical_id, attribute),
            "AWS::SQS::Queue" => self.get_att_sqs_queue(&resource.physical_id, attribute),
            "AWS::SNS::Topic" => self.get_att_sns_topic(&resource.physical_id, attribute),
            "AWS::DynamoDB::Table" => self.get_att_dynamodb_table(&resource.physical_id, attribute),
            "AWS::KMS::Key" => self.get_att_kms_key(&resource.physical_id, attribute),
            "AWS::SecretsManager::Secret" => {
                self.get_att_secrets_manager_secret(&resource.physical_id, attribute)
            }
            "AWS::CloudFront::Distribution" => {
                self.get_att_cf_distribution(&resource.physical_id, attribute)
            }
            "AWS::ECS::Cluster" => self.get_att_ecs_cluster(&resource.physical_id, attribute),
            "AWS::ECS::Service" => self.get_att_ecs_service(&resource.physical_id, attribute),
            "AWS::EC2::VPC"
            | "AWS::EC2::Subnet"
            | "AWS::EC2::SecurityGroup"
            | "AWS::EC2::InternetGateway"
            | "AWS::EC2::RouteTable" => self.get_att_ec2(resource, attribute),
            "AWS::ECS::CapacityProvider" => {
                self.get_att_ecs_capacity_provider(&resource.physical_id, attribute)
            }
            "AWS::ECR::Repository" => self.get_att_ecr_repository(&resource.physical_id, attribute),
            "AWS::ElasticLoadBalancingV2::LoadBalancer" => {
                self.get_att_elbv2_load_balancer(&resource.physical_id, attribute)
            }
            "AWS::ElasticLoadBalancingV2::TargetGroup" => {
                self.get_att_elbv2_target_group(&resource.physical_id, attribute)
            }
            "AWS::ElasticLoadBalancingV2::Listener" => {
                self.get_att_elbv2_listener(&resource.physical_id, attribute)
            }
            "AWS::ElasticLoadBalancingV2::ListenerRule" => {
                self.get_att_elbv2_listener_rule(&resource.physical_id, attribute)
            }
            "AWS::ElasticLoadBalancingV2::TrustStore" => {
                self.get_att_elbv2_trust_store(&resource.physical_id, attribute)
            }
            "AWS::WAFv2::WebACL" => self.get_att_wafv2_web_acl(&resource.physical_id, attribute),
            "AWS::WAFv2::IPSet" => self.get_att_wafv2_ip_set(&resource.physical_id, attribute),
            "AWS::WAFv2::RegexPatternSet" => {
                self.get_att_wafv2_regex_pattern_set(&resource.physical_id, attribute)
            }
            "AWS::WAFv2::RuleGroup" => {
                self.get_att_wafv2_rule_group(&resource.physical_id, attribute)
            }
            "AWS::SES::ConfigurationSet" => {
                self.get_att_ses_configuration_set(&resource.physical_id, attribute)
            }
            "AWS::SES::EmailIdentity" => {
                self.get_att_ses_email_identity(&resource.physical_id, attribute)
            }
            "AWS::SES::Template" => self.get_att_ses_template(&resource.physical_id, attribute),
            "AWS::SES::ContactList" => {
                self.get_att_ses_contact_list(&resource.physical_id, attribute)
            }
            "AWS::SES::DedicatedIpPool" => {
                self.get_att_ses_dedicated_ip_pool(&resource.physical_id, attribute)
            }
            "AWS::SES::ReceiptRuleSet" => {
                self.get_att_ses_receipt_rule_set(&resource.physical_id, attribute)
            }
            "AWS::Athena::DataCatalog" => {
                self.get_att_athena_data_catalog(&resource.physical_id, attribute)
            }
            "AWS::Athena::NamedQuery" => {
                self.get_att_athena_named_query(&resource.physical_id, attribute)
            }
            "AWS::Athena::WorkGroup" => {
                self.get_att_athena_work_group(&resource.physical_id, attribute)
            }
            "AWS::Athena::PreparedStatement" => {
                self.get_att_athena_prepared_statement(&resource.physical_id, attribute)
            }
            "AWS::CloudFormation::Stack" => {
                self.get_att_cloudformation_stack(&resource.physical_id, attribute)
            }
            _ => None,
        }
    }

    fn get_att_cf_distribution(&self, physical_id: &str, attribute: &str) -> Option<String> {
        // CloudFront state is keyed under a fixed "000000000000" account in the
        // fakecloud_cloudfront crate; matching create_cf_distribution above.
        let accounts = self.cloudfront_state.read();
        let state = accounts.get("000000000000")?;
        let dist = state.distributions.get(physical_id)?;
        match attribute {
            "DomainName" => Some(dist.domain_name.clone()),
            "Id" => Some(dist.id.clone()),
            _ => None,
        }
    }

    /// Delete a previously created resource.
    pub fn delete_resource(&self, resource: &StackResource) -> Result<(), String> {
        match resource.resource_type.as_str() {
            "AWS::SQS::Queue" => self.delete_sqs_queue(&resource.physical_id),
            "AWS::SQS::QueuePolicy" => self.delete_sqs_queue_policy(&resource.physical_id),
            "AWS::SNS::Topic" => self.delete_sns_topic(&resource.physical_id),
            "AWS::SNS::TopicPolicy" => self.delete_sns_topic_policy(&resource.physical_id),
            "AWS::SNS::Subscription" => self.delete_sns_subscription(&resource.physical_id),
            "AWS::SSM::Parameter" => self.delete_ssm_parameter(&resource.physical_id),
            "AWS::IAM::Role" => self.delete_iam_role(&resource.physical_id),
            "AWS::IAM::Policy" => self.delete_iam_policy(&resource.physical_id),
            "AWS::IAM::User" => self.delete_iam_user(&resource.physical_id),
            "AWS::IAM::Group" => self.delete_iam_group(&resource.physical_id),
            "AWS::IAM::ManagedPolicy" => self.delete_iam_managed_policy(&resource.physical_id),
            "AWS::IAM::UserToGroupAddition" => {
                self.delete_iam_user_to_group_addition(&resource.physical_id)
            }
            "AWS::IAM::AccessKey" => self.delete_iam_access_key(&resource.physical_id),
            "AWS::IAM::InstanceProfile" => self.delete_iam_instance_profile(&resource.physical_id),
            "AWS::IAM::OIDCProvider" => self.delete_iam_oidc_provider(&resource.physical_id),
            "AWS::IAM::SAMLProvider" => self.delete_iam_saml_provider(&resource.physical_id),
            "AWS::IAM::ServiceLinkedRole" => {
                self.delete_iam_service_linked_role(&resource.physical_id)
            }
            "AWS::IAM::VirtualMFADevice" => {
                self.delete_iam_virtual_mfa_device(&resource.physical_id)
            }
            "AWS::S3::Bucket" => self.delete_s3_bucket(&resource.physical_id),
            "AWS::S3::BucketPolicy" => self.delete_s3_bucket_policy(&resource.physical_id),
            "AWS::Events::Rule" => self.delete_eventbridge_rule(&resource.physical_id),
            "AWS::Events::Connection" => self.delete_eventbridge_connection(&resource.physical_id),
            "AWS::Events::EventBus" => self.delete_eventbridge_event_bus(&resource.physical_id),
            "AWS::Events::EventBusPolicy" => {
                self.delete_eventbridge_event_bus_policy(&resource.physical_id)
            }
            "AWS::Events::Endpoint" => self.delete_eventbridge_endpoint(&resource.physical_id),
            "AWS::Events::ApiDestination" => {
                self.delete_eventbridge_api_destination(&resource.physical_id)
            }
            "AWS::Events::Archive" => self.delete_eventbridge_archive(&resource.physical_id),
            "AWS::DynamoDB::Table" => self.delete_dynamodb_table(&resource.physical_id),
            "AWS::Logs::LogGroup" => self.delete_log_group(&resource.physical_id),
            "AWS::Logs::LogStream" => self.delete_log_stream(&resource.physical_id),
            "AWS::Logs::MetricFilter" => self.delete_metric_filter(&resource.physical_id),
            "AWS::Logs::SubscriptionFilter" => {
                self.delete_subscription_filter(&resource.physical_id)
            }
            "AWS::Logs::Destination" => self.delete_logs_destination(&resource.physical_id),
            "AWS::Logs::ResourcePolicy" => self.delete_logs_resource_policy(&resource.physical_id),
            "AWS::Logs::QueryDefinition" => {
                self.delete_logs_query_definition(&resource.physical_id)
            }
            "AWS::Logs::Delivery" => self.delete_logs_delivery(&resource.physical_id),
            "AWS::Logs::DeliveryDestination" => {
                self.delete_logs_delivery_destination(&resource.physical_id)
            }
            "AWS::Logs::DeliverySource" => self.delete_logs_delivery_source(&resource.physical_id),
            "AWS::Lambda::Function" => self.delete_lambda_function(&resource.physical_id),
            "AWS::Lambda::Permission" => self.delete_lambda_permission(&resource.physical_id),
            "AWS::Lambda::EventSourceMapping" => {
                self.delete_lambda_event_source_mapping(&resource.physical_id)
            }
            "AWS::Lambda::LayerVersion" => self.delete_lambda_layer_version(&resource.physical_id),
            "AWS::Lambda::Url" => self.delete_lambda_url(&resource.physical_id),
            "AWS::Lambda::Alias" => self.delete_lambda_alias(&resource.physical_id),
            "AWS::Lambda::Version" => self.delete_lambda_version(&resource.physical_id),
            "AWS::SecretsManager::Secret" => {
                self.delete_secrets_manager_secret(&resource.physical_id)
            }
            "AWS::Kinesis::Stream" => self.delete_kinesis_stream(&resource.physical_id),
            "AWS::Kinesis::StreamConsumer" => {
                self.delete_kinesis_stream_consumer(&resource.physical_id)
            }
            "AWS::KMS::Key" => self.delete_kms_key(&resource.physical_id),
            "AWS::KMS::ReplicaKey" => self.delete_kms_replica_key(&resource.physical_id),
            "AWS::KMS::Alias" => self.delete_kms_alias(&resource.physical_id),
            "AWS::ECR::Repository" => self.delete_ecr_repository(&resource.physical_id),
            "AWS::ECR::RepositoryPolicy" => {
                self.delete_ecr_repository_policy(&resource.physical_id)
            }
            "AWS::ECR::LifecyclePolicy" => self.delete_ecr_lifecycle_policy(&resource.physical_id),
            "AWS::ECR::RegistryPolicy" => self.delete_ecr_registry_policy(),
            "AWS::ECR::ReplicationConfiguration" => self.delete_ecr_replication_configuration(),
            "AWS::ECR::RegistryScanningConfiguration" => {
                self.delete_ecr_registry_scanning_configuration()
            }
            "AWS::ECR::PullThroughCacheRule" => {
                self.delete_ecr_pull_through_cache_rule(&resource.physical_id)
            }
            "AWS::CloudWatch::Alarm" => self.delete_cloudwatch_alarm(&resource.physical_id),
            "AWS::CloudWatch::Dashboard" => self.delete_cloudwatch_dashboard(&resource.physical_id),
            "AWS::ElasticLoadBalancingV2::LoadBalancer" => {
                self.delete_elbv2_load_balancer(&resource.physical_id)
            }
            "AWS::ElasticLoadBalancingV2::TargetGroup" => {
                self.delete_elbv2_target_group(&resource.physical_id)
            }
            "AWS::ElasticLoadBalancingV2::Listener" => {
                self.delete_elbv2_listener(&resource.physical_id)
            }
            "AWS::ElasticLoadBalancingV2::ListenerRule" => {
                self.delete_elbv2_listener_rule(&resource.physical_id)
            }
            "AWS::ElasticLoadBalancingV2::ListenerCertificate" => {
                self.delete_elbv2_listener_certificate(&resource.physical_id)
            }
            "AWS::ElasticLoadBalancingV2::TrustStore" => {
                self.delete_elbv2_trust_store(&resource.physical_id)
            }
            "AWS::Organizations::Organization" => self.delete_organization(&resource.physical_id),
            "AWS::Organizations::OrganizationalUnit" => {
                self.delete_organization_unit(&resource.physical_id)
            }
            "AWS::Organizations::Account" => {
                self.delete_organization_account(&resource.physical_id)
            }
            "AWS::Organizations::Policy" => self.delete_organization_policy(&resource.physical_id),
            "AWS::Organizations::ResourcePolicy" => {
                self.delete_organization_resource_policy(&resource.physical_id)
            }
            "AWS::Cognito::UserPool" => self.delete_cognito_user_pool(&resource.physical_id),
            "AWS::Cognito::UserPoolClient" => {
                self.delete_cognito_user_pool_client(&resource.physical_id)
            }
            "AWS::Cognito::UserPoolDomain" => {
                self.delete_cognito_user_pool_domain(&resource.physical_id)
            }
            "AWS::Cognito::IdentityPool" => {
                self.delete_cognito_identity_pool(&resource.physical_id)
            }
            "AWS::Cognito::IdentityPoolRoleAttachment" => {
                self.delete_cognito_identity_pool_role_attachment(&resource.physical_id)
            }
            "AWS::RDS::DBSubnetGroup" => self.delete_rds_subnet_group(&resource.physical_id),
            "AWS::RDS::DBParameterGroup" => self.delete_rds_parameter_group(&resource.physical_id),
            "AWS::RDS::DBClusterParameterGroup" => {
                self.delete_rds_cluster_parameter_group(&resource.physical_id)
            }
            "AWS::RDS::OptionGroup" => self.delete_rds_option_group(&resource.physical_id),
            "AWS::RDS::EventSubscription" => {
                self.delete_rds_event_subscription(&resource.physical_id)
            }
            "AWS::RDS::DBSecurityGroup" => self.delete_rds_security_group(&resource.physical_id),
            "AWS::RDS::DBProxy" => self.delete_rds_db_proxy(&resource.physical_id),
            "AWS::RDS::DBInstance" => self.delete_rds_db_instance(&resource.physical_id),
            "AWS::RDS::DBCluster" => self.delete_rds_db_cluster(&resource.physical_id),
            "AWS::EC2::VPC"
            | "AWS::EC2::Subnet"
            | "AWS::EC2::SecurityGroup"
            | "AWS::EC2::InternetGateway"
            | "AWS::EC2::RouteTable" => {
                self.delete_ec2_resource(&resource.resource_type, &resource.physical_id)
            }
            "AWS::AutoScaling::LaunchConfiguration" | "AWS::AutoScaling::AutoScalingGroup" => {
                self.delete_autoscaling(&resource.resource_type, &resource.physical_id);
                Ok(())
            }
            "AWS::Batch::ComputeEnvironment"
            | "AWS::Batch::JobQueue"
            | "AWS::Batch::JobDefinition"
            | "AWS::Batch::SchedulingPolicy" => {
                self.delete_batch(&resource.resource_type, &resource.physical_id);
                Ok(())
            }
            "AWS::ECS::Cluster" => self.delete_ecs_cluster(&resource.physical_id),
            "AWS::ECS::TaskDefinition" => self.delete_ecs_task_definition(&resource.physical_id),
            "AWS::ECS::Service" => self.delete_ecs_service(&resource.physical_id),
            "AWS::ECS::CapacityProvider" => {
                self.delete_ecs_capacity_provider(&resource.physical_id)
            }
            "AWS::CertificateManager::Certificate" => {
                self.delete_acm_certificate(&resource.physical_id)
            }
            "AWS::CertificateManager::Account" => self.delete_acm_account(),
            "AWS::ElastiCache::ParameterGroup" => {
                self.delete_ec_parameter_group(&resource.physical_id)
            }
            "AWS::ElastiCache::SubnetGroup" => self.delete_ec_subnet_group(&resource.physical_id),
            "AWS::ElastiCache::SecurityGroup" => {
                self.delete_ec_security_group(&resource.physical_id)
            }
            "AWS::ElastiCache::User" => self.delete_ec_user(&resource.physical_id),
            "AWS::ElastiCache::UserGroup" => self.delete_ec_user_group(&resource.physical_id),
            "AWS::ElastiCache::CacheCluster" => self.delete_ec_cache_cluster(&resource.physical_id),
            "AWS::ElastiCache::ReplicationGroup" => {
                self.delete_ec_replication_group(&resource.physical_id)
            }
            "AWS::Route53::HostedZone" => self.delete_route53_hosted_zone(&resource.physical_id),
            "AWS::Route53::RecordSet" => {
                self.delete_route53_record_set(&resource.physical_id, &resource.attributes)
            }
            "AWS::Route53::HealthCheck" => self.delete_route53_health_check(&resource.physical_id),
            "AWS::Route53::DNSSEC" => self.delete_route53_dnssec(&resource.physical_id),
            "AWS::Route53::KeySigningKey" => {
                self.delete_route53_key_signing_key(&resource.physical_id)
            }
            "AWS::CloudFront::CloudFrontOriginAccessIdentity" => {
                self.delete_cf_origin_access_identity(&resource.physical_id)
            }
            "AWS::CloudFront::Distribution" => self.delete_cf_distribution(&resource.physical_id),
            "AWS::CloudFront::OriginAccessControl" => {
                self.delete_cf_origin_access_control(&resource.physical_id)
            }
            "AWS::CloudFront::PublicKey" => self.delete_cf_public_key(&resource.physical_id),
            "AWS::CloudFront::KeyGroup" => self.delete_cf_key_group(&resource.physical_id),
            "AWS::CloudFront::Function" => self.delete_cf_function(&resource.physical_id),
            "AWS::CloudFront::CachePolicy" => self.delete_cf_cache_policy(&resource.physical_id),
            "AWS::CloudFront::OriginRequestPolicy" => {
                self.delete_cf_origin_request_policy(&resource.physical_id)
            }
            "AWS::CloudFront::ResponseHeadersPolicy" => {
                self.delete_cf_response_headers_policy(&resource.physical_id)
            }
            "AWS::StepFunctions::StateMachine" => {
                self.delete_sfn_state_machine(&resource.physical_id)
            }
            "AWS::StepFunctions::Activity" => self.delete_sfn_activity(&resource.physical_id),
            "AWS::StepFunctions::StateMachineVersion" => {
                self.delete_sfn_version(&resource.physical_id)
            }
            "AWS::StepFunctions::StateMachineAlias" => self.delete_sfn_alias(&resource.physical_id),
            "AWS::WAFv2::WebACL" => self.delete_wafv2_web_acl(&resource.physical_id),
            "AWS::WAFv2::IPSet" => self.delete_wafv2_ip_set(&resource.physical_id),
            "AWS::WAFv2::RegexPatternSet" => {
                self.delete_wafv2_regex_pattern_set(&resource.physical_id)
            }
            "AWS::WAFv2::RuleGroup" => self.delete_wafv2_rule_group(&resource.physical_id),
            "AWS::WAFv2::LoggingConfiguration" => {
                self.delete_wafv2_logging_configuration(&resource.physical_id)
            }
            "AWS::WAFv2::WebACLAssociation" => {
                self.delete_wafv2_web_acl_association(&resource.physical_id)
            }
            "AWS::ApiGateway::RestApi" => self.delete_apigw_rest_api(&resource.physical_id),
            "AWS::ApiGateway::Resource" => {
                self.delete_apigw_resource(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::Method" => self.delete_apigw_method(&resource.physical_id),
            "AWS::ApiGateway::Deployment" => {
                self.delete_apigw_deployment(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::Stage" => {
                self.delete_apigw_stage(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::Authorizer" => {
                self.delete_apigw_authorizer(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::RequestValidator" => {
                self.delete_apigw_request_validator(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::Model" => {
                self.delete_apigw_model(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::GatewayResponse" => {
                self.delete_apigw_gateway_response(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::UsagePlan" => self.delete_apigw_usage_plan(&resource.physical_id),
            "AWS::ApiGateway::ApiKey" => self.delete_apigw_api_key(&resource.physical_id),
            "AWS::ApiGateway::UsagePlanKey" => {
                self.delete_apigw_usage_plan_key(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGateway::DomainName" => self.delete_apigw_domain_name(&resource.physical_id),
            "AWS::ApiGateway::BasePathMapping" => {
                self.delete_apigw_base_path_mapping(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::Api" => self.delete_apigwv2_api(&resource.physical_id),
            "AWS::ApiGatewayV2::Route" => {
                self.delete_apigwv2_route(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::Integration" => {
                self.delete_apigwv2_integration(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::IntegrationResponse" => self
                .delete_apigwv2_integration_response(&resource.physical_id, &resource.attributes),
            "AWS::ApiGatewayV2::RouteResponse" => {
                self.delete_apigwv2_route_response(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::Stage" => {
                self.delete_apigwv2_stage(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::Deployment" => {
                self.delete_apigwv2_deployment(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::Authorizer" => {
                self.delete_apigwv2_authorizer(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::DomainName" => {
                self.delete_apigwv2_domain_name(&resource.physical_id)
            }
            "AWS::ApiGatewayV2::ApiMapping" => {
                self.delete_apigwv2_api_mapping(&resource.physical_id, &resource.attributes)
            }
            "AWS::ApiGatewayV2::VpcLink" => self.delete_apigwv2_vpc_link(&resource.physical_id),
            "AWS::ApiGatewayV2::Model" => {
                self.delete_apigwv2_model(&resource.physical_id, &resource.attributes)
            }
            "AWS::SES::ConfigurationSet" => {
                self.delete_ses_configuration_set(&resource.physical_id)
            }
            "AWS::SES::ConfigurationSetEventDestination" => {
                self.delete_ses_event_destination(&resource.physical_id, &resource.attributes)
            }
            "AWS::SES::EmailIdentity" => self.delete_ses_email_identity(&resource.physical_id),
            "AWS::SES::Template" => self.delete_ses_template(&resource.physical_id),
            "AWS::SES::ContactList" => self.delete_ses_contact_list(&resource.physical_id),
            "AWS::SES::DedicatedIpPool" => self.delete_ses_dedicated_ip_pool(&resource.physical_id),
            "AWS::SES::ReceiptRule" => {
                self.delete_ses_receipt_rule(&resource.physical_id, &resource.attributes)
            }
            "AWS::SES::ReceiptRuleSet" => self.delete_ses_receipt_rule_set(&resource.physical_id),
            "AWS::SES::ReceiptFilter" => self.delete_ses_receipt_filter(&resource.physical_id),
            "AWS::SES::VdmAttributes" => Ok(()),
            "AWS::SecretsManager::RotationSchedule" => {
                self.delete_secrets_manager_rotation_schedule(&resource.physical_id)
            }
            "AWS::SecretsManager::ResourcePolicy" => {
                self.delete_secrets_manager_resource_policy(&resource.physical_id)
            }
            "AWS::SecretsManager::SecretTargetAttachment" => Ok(()),
            "AWS::ApplicationAutoScaling::ScalableTarget" => self
                .delete_application_autoscaling_scalable_target(
                    &resource.physical_id,
                    &resource.attributes,
                ),
            "AWS::ApplicationAutoScaling::ScalingPolicy" => self
                .delete_application_autoscaling_scaling_policy(
                    &resource.physical_id,
                    &resource.attributes,
                ),
            "AWS::Athena::DataCatalog" => self.delete_athena_data_catalog(&resource.physical_id),
            "AWS::Athena::NamedQuery" => self.delete_athena_named_query(&resource.physical_id),
            "AWS::Athena::WorkGroup" => self.delete_athena_work_group(&resource.physical_id),
            "AWS::Athena::PreparedStatement" => {
                self.delete_athena_prepared_statement(&resource.physical_id, &resource.attributes)
            }
            "AWS::KinesisFirehose::DeliveryStream" => {
                self.delete_firehose_delivery_stream(&resource.physical_id)
            }
            "AWS::Glue::Database" => self.delete_glue_database(&resource.physical_id),
            "AWS::CloudFormation::Stack" => self.delete_cloudformation_stack(&resource.physical_id),
            "AWS::Glue::Table" => self.delete_glue_table(&resource.physical_id),
            "AWS::Glue::Partition" => {
                self.delete_glue_partition(&resource.physical_id, &resource.attributes)
            }
            t if t.starts_with("Custom::") || t == "AWS::CloudFormation::CustomResource" => {
                self.delete_custom_resource(resource)
            }
            // No provisioner for this type — it was recorded with no backing
            // state at create time (see `create_resource`), so there is nothing
            // to delete. Succeed so stack teardown isn't blocked.
            _ => Ok(()),
        }
    }

    // --- CloudWatch Logs ---

    fn create_log_group(&self, resource: &ResourceDefinition) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let log_group_name = props
            .get("LogGroupName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id);

        let retention_in_days = props
            .get("RetentionInDays")
            .and_then(|v| v.as_i64())
            .map(|v| v as i32);

        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        let arn = format!(
            "arn:aws:logs:{}:{}:log-group:{}:*",
            state.region, state.account_id, log_group_name
        );

        let log_group = fakecloud_logs::LogGroup {
            name: log_group_name.to_string(),
            arn: arn.clone(),
            creation_time: Utc::now().timestamp_millis(),
            retention_in_days,
            kms_key_id: None,
            stored_bytes: 0,
            log_streams: std::collections::BTreeMap::new(),
            tags: std::collections::BTreeMap::new(),
            subscription_filters: Vec::new(),
            data_protection_policy: None,
            index_policies: Vec::new(),
            transformer: None,
            deletion_protection: false,
            log_group_class: Some("STANDARD".to_string()),
        };

        state
            .log_groups
            .insert(log_group_name.to_string(), log_group);
        Ok(ProvisionResult::new(arn.clone()).with("Arn", arn))
    }

    /// Look up an S3 object's bytes from the in-process S3 state. Used by
    /// the Lambda function provisioner to hydrate `Code.S3Bucket` /
    /// `Code.S3Key` references into real ZIP content. Returns an error
    /// string when the bucket or key is missing so the CFN error
    /// surfaces back to the caller.
    fn read_s3_object_bytes(&self, bucket: &str, key: &str) -> Result<Vec<u8>, String> {
        let mut accounts = self.s3_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let body_ref = {
            let b = state
                .buckets
                .get(bucket)
                .ok_or_else(|| format!("S3 bucket {bucket} does not exist"))?;
            let object = b
                .objects
                .get(key)
                .ok_or_else(|| format!("S3 object s3://{bucket}/{key} does not exist"))?;
            object.body.clone()
        };
        // `read_body` consults the body cache (which is owned by the state),
        // so re-borrow `state` after dropping the bucket borrow above.
        state
            .read_body(&body_ref)
            .map(|b| b.to_vec())
            .map_err(|e| format!("S3 read failed: {e}"))
    }

    /// Read a specific object version's bytes. Used when a CFN property
    /// pins an S3 object `Version` (e.g.
    /// `DefinitionS3Location.Version`), so the exact referenced body is
    /// loaded rather than whatever is current. Falls through the current
    /// object and the version history.
    fn read_s3_object_version_bytes(
        &self,
        bucket: &str,
        key: &str,
        version_id: &str,
    ) -> Result<Vec<u8>, String> {
        let mut accounts = self.s3_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let body_ref = {
            let b = state
                .buckets
                .get(bucket)
                .ok_or_else(|| format!("S3 bucket {bucket} does not exist"))?;
            let from_current = b
                .objects
                .get(key)
                .filter(|o| o.version_id.as_deref() == Some(version_id))
                .map(|o| o.body.clone());
            from_current
                .or_else(|| {
                    b.object_versions.get(key).and_then(|versions| {
                        versions
                            .iter()
                            .find(|o| o.version_id.as_deref() == Some(version_id))
                            .map(|o| o.body.clone())
                    })
                })
                .ok_or_else(|| {
                    format!("S3 object s3://{bucket}/{key} version {version_id} does not exist")
                })?
        };
        state
            .read_body(&body_ref)
            .map(|b| b.to_vec())
            .map_err(|e| format!("S3 read failed: {e}"))
    }

    /// Build a canonical Lambda resource-policy statement from a CFN
    /// `AWS::Lambda::Permission` `Properties` map and append it to the
    /// function's stored policy. Shared by create + update so the same
    /// property→condition mapping applies on both paths. Returns the
    /// function ARN of the target so callers can echo it back if needed.
    fn append_lambda_permission_statement(
        &self,
        function_name: &str,
        statement_id: &str,
        props: &serde_json::Value,
    ) -> Result<String, String> {
        let action = props
            .get("Action")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "Action is required".to_string())?
            .to_string();
        let principal = props
            .get("Principal")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "Principal is required".to_string())?
            .to_string();
        let source_arn = props
            .get("SourceArn")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let source_account = props
            .get("SourceAccount")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let event_source_token = props
            .get("EventSourceToken")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let function_url_auth_type = props
            .get("FunctionUrlAuthType")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let principal_org_id = props
            .get("PrincipalOrgID")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());

        let mut accounts = self.lambda_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let func = state.functions.get_mut(function_name).ok_or_else(|| {
            format!(
                "Function {function_name} does not exist yet — retry once it has been provisioned"
            )
        })?;

        let mut doc: serde_json::Value = func
            .policy
            .as_deref()
            .and_then(|s| serde_json::from_str::<serde_json::Value>(s).ok())
            .filter(|v| v.is_object())
            .unwrap_or_else(|| serde_json::json!({"Version": "2012-10-17", "Statement": []}));
        if !doc.get("Statement").map(|s| s.is_array()).unwrap_or(false) {
            doc["Statement"] = serde_json::json!([]);
        }
        let principal_value =
            if principal.ends_with(".amazonaws.com") || principal.contains(".amazon") {
                serde_json::json!({ "Service": principal })
            } else {
                serde_json::json!({ "AWS": principal })
            };
        let mut arn_like = serde_json::Map::new();
        let mut string_equals = serde_json::Map::new();
        if let Some(src) = source_arn {
            arn_like.insert("AWS:SourceArn".to_string(), serde_json::Value::String(src));
        }
        if let Some(acct) = source_account {
            string_equals.insert(
                "AWS:SourceAccount".to_string(),
                serde_json::Value::String(acct),
            );
        }
        if let Some(token) = event_source_token {
            string_equals.insert(
                "lambda:EventSourceToken".to_string(),
                serde_json::Value::String(token),
            );
        }
        if let Some(auth) = function_url_auth_type {
            string_equals.insert(
                "lambda:FunctionUrlAuthType".to_string(),
                serde_json::Value::String(auth),
            );
        }
        if let Some(org) = principal_org_id {
            string_equals.insert(
                "aws:PrincipalOrgID".to_string(),
                serde_json::Value::String(org),
            );
        }
        let mut conditions = serde_json::Map::new();
        if !arn_like.is_empty() {
            conditions.insert("ArnLike".to_string(), serde_json::Value::Object(arn_like));
        }
        if !string_equals.is_empty() {
            conditions.insert(
                "StringEquals".to_string(),
                serde_json::Value::Object(string_equals),
            );
        }

        let mut statement = serde_json::Map::new();
        statement.insert(
            "Sid".to_string(),
            serde_json::Value::String(statement_id.to_string()),
        );
        statement.insert(
            "Effect".to_string(),
            serde_json::Value::String("Allow".to_string()),
        );
        statement.insert("Principal".to_string(), principal_value);
        statement.insert("Action".to_string(), serde_json::Value::String(action));
        statement.insert(
            "Resource".to_string(),
            serde_json::Value::String(func.function_arn.clone()),
        );
        if !conditions.is_empty() {
            statement.insert(
                "Condition".to_string(),
                serde_json::Value::Object(conditions),
            );
        }
        doc["Statement"]
            .as_array_mut()
            .unwrap()
            .push(serde_json::Value::Object(statement));
        func.policy = Some(doc.to_string());
        Ok(func.function_arn.clone())
    }

    // --- ELBv2 ---

    fn create_elbv2_load_balancer(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let scheme = props
            .get("Scheme")
            .and_then(|v| v.as_str())
            .unwrap_or("internet-facing")
            .to_string();
        let lb_type = props
            .get("Type")
            .and_then(|v| v.as_str())
            .unwrap_or("application")
            .to_string();
        let ip_address_type = props
            .get("IpAddressType")
            .and_then(|v| v.as_str())
            .unwrap_or("ipv4")
            .to_string();
        let security_groups: Vec<String> = props
            .get("SecurityGroups")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|s| s.as_str().map(|s| s.to_string()))
                    .collect()
            })
            .unwrap_or_default();
        let tags = parse_elb_tags(props.get("Tags"));

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let lb_id = Uuid::new_v4().simple().to_string();
        let arn = format!(
            "arn:aws:elasticloadbalancing:{}:{}:loadbalancer/{}/{}/{}",
            self.region,
            self.account_id,
            if lb_type == "network" { "net" } else { "app" },
            name,
            &lb_id[..16]
        );
        let dns_name = format!(
            "{}-{}.{}.elb.{}.amazonaws.com",
            name,
            &lb_id[..16],
            self.region,
            self.region
        );

        let mut availability_zones: Vec<fakecloud_elbv2::AvailabilityZone> = Vec::new();
        if let Some(arr) = props.get("Subnets").and_then(|v| v.as_array()) {
            for s in arr {
                if let Some(subnet_id) = s.as_str() {
                    availability_zones.push(fakecloud_elbv2::AvailabilityZone {
                        zone_name: format!("{}a", self.region),
                        subnet_id: subnet_id.to_string(),
                        outpost_id: None,
                        load_balancer_addresses: Vec::new(),
                        source_nat_ipv6_prefixes: Vec::new(),
                    });
                }
            }
        }

        state.load_balancers.insert(
            arn.clone(),
            LoadBalancer {
                arn: arn.clone(),
                name: name.clone(),
                dns_name: dns_name.clone(),
                canonical_hosted_zone_id: "Z2P70J7EXAMPLE".to_string(),
                created_time: Utc::now(),
                scheme,
                vpc_id: String::new(),
                state_code: "active".to_string(),
                state_reason: None,
                lb_type,
                availability_zones,
                security_groups,
                ip_address_type,
                customer_owned_ipv4_pool: None,
                enforce_security_group_inbound_rules_on_private_link_traffic: None,
                enable_prefix_for_ipv6_source_nat: None,
                ipv4_ipam_pool_id: None,
                tags,
                attributes: BTreeMap::new(),
                minimum_capacity_units: None,
                bound_port: None,
            },
        );

        Ok(ProvisionResult::new(arn.clone())
            .with("LoadBalancerArn", arn)
            .with(
                "LoadBalancerFullName",
                format!("app/{name}/{}", &lb_id[..16]),
            )
            .with("LoadBalancerName", name)
            .with("DNSName", dns_name)
            .with("CanonicalHostedZoneID", "Z2P70J7EXAMPLE"))
    }

    fn delete_elbv2_load_balancer(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.load_balancers.remove(physical_id);
        // Cascade-delete listeners and rules attached to this LB.
        let listeners: Vec<String> = state
            .listeners
            .iter()
            .filter(|(_, l)| l.load_balancer_arn == physical_id)
            .map(|(arn, _)| arn.clone())
            .collect();
        for arn in &listeners {
            state.listeners.remove(arn);
            let rules: Vec<String> = state
                .rules
                .iter()
                .filter(|(_, r)| r.listener_arn == *arn)
                .map(|(a, _)| a.clone())
                .collect();
            for r in rules {
                state.rules.remove(&r);
            }
        }
        for tg in state.target_groups.values_mut() {
            tg.load_balancer_arns.retain(|a| a != physical_id);
        }
        Ok(())
    }

    fn create_elbv2_target_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let protocol = props
            .get("Protocol")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let port = props.get("Port").and_then(|v| v.as_i64()).map(|n| n as i32);
        let vpc_id = props
            .get("VpcId")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let target_type = props
            .get("TargetType")
            .and_then(|v| v.as_str())
            .unwrap_or("instance")
            .to_string();
        let ip_address_type = props
            .get("IpAddressType")
            .and_then(|v| v.as_str())
            .unwrap_or("ipv4")
            .to_string();
        let protocol_version = props
            .get("ProtocolVersion")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let tags = parse_elb_tags(props.get("Tags"));

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let id = Uuid::new_v4().simple().to_string();
        let arn = format!(
            "arn:aws:elasticloadbalancing:{}:{}:targetgroup/{}/{}",
            self.region,
            self.account_id,
            name,
            &id[..16]
        );

        state.target_groups.insert(
            arn.clone(),
            TargetGroup {
                arn: arn.clone(),
                name: name.clone(),
                protocol,
                port,
                vpc_id,
                target_type,
                ip_address_type,
                protocol_version,
                health_check_protocol: props
                    .get("HealthCheckProtocol")
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                health_check_port: props
                    .get("HealthCheckPort")
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                health_check_enabled: props
                    .get("HealthCheckEnabled")
                    .and_then(|v| v.as_bool())
                    .unwrap_or(true),
                health_check_path: props
                    .get("HealthCheckPath")
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                health_check_interval_seconds: props
                    .get("HealthCheckIntervalSeconds")
                    .and_then(|v| v.as_i64())
                    .unwrap_or(30) as i32,
                health_check_timeout_seconds: props
                    .get("HealthCheckTimeoutSeconds")
                    .and_then(|v| v.as_i64())
                    .unwrap_or(5) as i32,
                healthy_threshold_count: props
                    .get("HealthyThresholdCount")
                    .and_then(|v| v.as_i64())
                    .unwrap_or(5) as i32,
                unhealthy_threshold_count: props
                    .get("UnhealthyThresholdCount")
                    .and_then(|v| v.as_i64())
                    .unwrap_or(2) as i32,
                matcher_http_code: props
                    .get("Matcher")
                    .and_then(|v| v.get("HttpCode"))
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                matcher_grpc_code: props
                    .get("Matcher")
                    .and_then(|v| v.get("GrpcCode"))
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                load_balancer_arns: Vec::new(),
                targets: Vec::new(),
                tags,
                attributes: BTreeMap::new(),
                created_time: Utc::now(),
            },
        );

        Ok(ProvisionResult::new(arn.clone())
            .with("TargetGroupArn", arn)
            .with("TargetGroupName", name)
            .with("TargetGroupFullName", format!("targetgroup/{}", &id[..16])))
    }

    fn delete_elbv2_target_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.target_groups.remove(physical_id);
        Ok(())
    }

    fn create_elbv2_listener(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let load_balancer_arn = props
            .get("LoadBalancerArn")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "LoadBalancerArn is required".to_string())?
            .to_string();
        let port = props.get("Port").and_then(|v| v.as_i64()).map(|n| n as i32);
        let protocol = props
            .get("Protocol")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let default_actions = parse_elb_actions(props.get("DefaultActions"));

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        if !state.load_balancers.contains_key(&load_balancer_arn) {
            return Err(format!(
                "LoadBalancer {load_balancer_arn} not yet provisioned"
            ));
        }

        let lb_full = load_balancer_arn
            .rsplit("loadbalancer/")
            .next()
            .unwrap_or("")
            .to_string();
        let listener_id = Uuid::new_v4().simple().to_string();
        let arn = format!(
            "arn:aws:elasticloadbalancing:{}:{}:listener/{}/{}",
            self.region,
            self.account_id,
            lb_full,
            &listener_id[..16]
        );

        // Wire forward target groups -> LB association so dataplane probing
        // and DescribeTargetGroups round-trip the relationship.
        for action in &default_actions {
            if let Some(tg_arn) = &action.target_group_arn {
                if let Some(tg) = state.target_groups.get_mut(tg_arn) {
                    if !tg.load_balancer_arns.contains(&load_balancer_arn) {
                        tg.load_balancer_arns.push(load_balancer_arn.clone());
                    }
                }
            }
            if let Some(forward) = &action.forward {
                for tgt in &forward.target_groups {
                    if let Some(tg) = state.target_groups.get_mut(&tgt.target_group_arn) {
                        if !tg.load_balancer_arns.contains(&load_balancer_arn) {
                            tg.load_balancer_arns.push(load_balancer_arn.clone());
                        }
                    }
                }
            }
        }

        state.listeners.insert(
            arn.clone(),
            Listener {
                arn: arn.clone(),
                load_balancer_arn,
                port,
                protocol,
                certificates: Vec::new(),
                ssl_policy: props
                    .get("SslPolicy")
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string()),
                default_actions,
                alpn_policy: Vec::new(),
                mutual_authentication: None,
                tags: parse_elb_tags(props.get("Tags")),
                attributes: BTreeMap::new(),
            },
        );

        Ok(ProvisionResult::new(arn.clone()).with("ListenerArn", arn))
    }

    fn delete_elbv2_listener(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.listeners.remove(physical_id);
        let rules: Vec<String> = state
            .rules
            .iter()
            .filter(|(_, r)| r.listener_arn == physical_id)
            .map(|(arn, _)| arn.clone())
            .collect();
        for r in rules {
            state.rules.remove(&r);
        }
        Ok(())
    }

    fn create_elbv2_listener_rule(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let listener_arn = props
            .get("ListenerArn")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ListenerArn is required".to_string())?
            .to_string();
        let priority = props
            .get("Priority")
            .map(|v| {
                if let Some(s) = v.as_str() {
                    s.to_string()
                } else if let Some(n) = v.as_i64() {
                    n.to_string()
                } else {
                    "1".to_string()
                }
            })
            .unwrap_or_else(|| "1".to_string());
        let actions = parse_elb_actions(props.get("Actions"));
        let conditions = parse_elb_rule_conditions(props.get("Conditions"));

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        if !state.listeners.contains_key(&listener_arn) {
            return Err(format!("Listener {listener_arn} not yet provisioned"));
        }
        let listener_full = listener_arn
            .rsplit("listener/")
            .next()
            .unwrap_or("")
            .to_string();
        let rule_id = Uuid::new_v4().simple().to_string();
        let arn = format!(
            "arn:aws:elasticloadbalancing:{}:{}:listener-rule/{}/{}",
            self.region,
            self.account_id,
            listener_full,
            &rule_id[..16]
        );

        state.rules.insert(
            arn.clone(),
            ElbRule {
                arn: arn.clone(),
                listener_arn,
                priority,
                conditions,
                actions,
                is_default: false,
                tags: parse_elb_tags(props.get("Tags")),
            },
        );

        Ok(ProvisionResult::new(arn.clone()).with("RuleArn", arn))
    }

    fn delete_elbv2_listener_rule(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.rules.remove(physical_id);
        Ok(())
    }

    /// Provision an `AWS::ElasticLoadBalancingV2::ListenerCertificate`.
    /// Appends each non-default certificate from `Certificates` to the
    /// target listener (the default listener cert is set on Listener
    /// creation, so this resource only manages SNI extras).
    fn create_elbv2_listener_certificate(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let listener_arn = props
            .get("ListenerArn")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ListenerArn is required".to_string())?
            .to_string();
        let certs: Vec<String> = props
            .get("Certificates")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|c| c.get("CertificateArn").and_then(|v| v.as_str()))
                    .map(|s| s.to_string())
                    .collect()
            })
            .unwrap_or_default();
        if certs.is_empty() {
            return Err("Certificates must contain at least one CertificateArn".to_string());
        }
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let listener = state
            .listeners
            .get_mut(&listener_arn)
            .ok_or_else(|| format!("Listener {listener_arn} does not exist"))?;
        for arn in &certs {
            listener.certificates.retain(|c| &c.certificate_arn != arn);
            listener.certificates.push(fakecloud_elbv2::Certificate {
                certificate_arn: arn.clone(),
                is_default: false,
            });
        }
        Ok(ProvisionResult::new(format!(
            "{}#{}",
            listener_arn,
            certs.join(",")
        )))
    }

    fn delete_elbv2_listener_certificate(&self, physical_id: &str) -> Result<(), String> {
        let (listener_arn, cert_list) = match physical_id.split_once('#') {
            Some(parts) => parts,
            None => return Ok(()),
        };
        let cert_arns: Vec<&str> = cert_list.split(',').collect();
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        if let Some(listener) = state.listeners.get_mut(listener_arn) {
            listener
                .certificates
                .retain(|c| !cert_arns.iter().any(|a| *a == c.certificate_arn));
        }
        Ok(())
    }

    /// Provision an `AWS::ElasticLoadBalancingV2::TrustStore`.
    fn create_elbv2_trust_store(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let bucket = props
            .get("CaCertificatesBundleS3Bucket")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "CaCertificatesBundleS3Bucket is required".to_string())?;
        let key = props
            .get("CaCertificatesBundleS3Key")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "CaCertificatesBundleS3Key is required".to_string())?;
        let tags: Vec<fakecloud_elbv2::Tag> = props
            .get("Tags")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|t| {
                        let k = t.get("Key").and_then(|v| v.as_str())?;
                        let val = t.get("Value").and_then(|v| v.as_str()).unwrap_or("");
                        Some(fakecloud_elbv2::Tag {
                            key: k.to_string(),
                            value: val.to_string(),
                        })
                    })
                    .collect()
            })
            .unwrap_or_default();

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        if state.trust_stores.values().any(|t| t.name == name) {
            return Err(format!("Trust store {name} already exists"));
        }
        let suffix: String = Uuid::new_v4()
            .simple()
            .to_string()
            .chars()
            .take(16)
            .collect();
        let arn = format!(
            "arn:aws:elasticloadbalancing:{}:{}:truststore/{}/{}",
            self.region, self.account_id, name, suffix
        );
        let ts = fakecloud_elbv2::TrustStore {
            arn: arn.clone(),
            name: name.clone(),
            status: "ACTIVE".to_string(),
            number_of_ca_certificates: 1,
            total_revoked_entries: 0,
            created_time: Utc::now(),
            ca_certificates_bundle: Some(format!("s3://{bucket}/{key}").into_bytes()),
            revocations: BTreeMap::new(),
            next_revocation_id: 1,
            tags,
        };
        state.trust_stores.insert(arn.clone(), ts);
        Ok(ProvisionResult::new(arn.clone())
            .with("TrustStoreArn", arn)
            .with("Name", name)
            .with("Status", "ACTIVE".to_string()))
    }

    fn delete_elbv2_trust_store(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.trust_stores.remove(physical_id);
        Ok(())
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::LoadBalancer. Name,
    /// scheme, type and subnet topology are immutable in real AWS — CFN
    /// would replace the resource. We only mutate fields the SetSubnets /
    /// SetSecurityGroups / SetIpAddressType APIs would touch.
    fn update_elbv2_load_balancer(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let arn = existing.physical_id.clone();
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let lb = state
            .load_balancers
            .get_mut(&arn)
            .ok_or_else(|| format!("LoadBalancer {arn} no longer exists"))?;
        if let Some(arr) = props.get("SecurityGroups").and_then(|v| v.as_array()) {
            lb.security_groups = arr
                .iter()
                .filter_map(|s| s.as_str().map(|s| s.to_string()))
                .collect();
        }
        if let Some(s) = props.get("IpAddressType").and_then(|v| v.as_str()) {
            lb.ip_address_type = s.to_string();
        }
        if let Some(arr) = props.get("Subnets").and_then(|v| v.as_array()) {
            let mut zones: Vec<fakecloud_elbv2::AvailabilityZone> = Vec::new();
            for s in arr {
                if let Some(subnet_id) = s.as_str() {
                    zones.push(fakecloud_elbv2::AvailabilityZone {
                        zone_name: format!("{}a", self.region),
                        subnet_id: subnet_id.to_string(),
                        outpost_id: None,
                        load_balancer_addresses: Vec::new(),
                        source_nat_ipv6_prefixes: Vec::new(),
                    });
                }
            }
            lb.availability_zones = zones;
        }
        if props.get("Tags").is_some() {
            lb.tags = parse_elb_tags(props.get("Tags"));
        }
        let name = lb.name.clone();
        let dns_name = lb.dns_name.clone();
        let canonical = lb.canonical_hosted_zone_id.clone();
        let lb_full = arn.rsplit("loadbalancer/").next().unwrap_or("").to_string();
        Ok(ProvisionResult::new(arn.clone())
            .with("LoadBalancerArn", arn)
            .with("LoadBalancerFullName", lb_full)
            .with("LoadBalancerName", name)
            .with("DNSName", dns_name)
            .with("CanonicalHostedZoneID", canonical))
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::TargetGroup. Mirrors
    /// ModifyTargetGroup: only health-check fields and matcher are mutable.
    fn update_elbv2_target_group(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let arn = existing.physical_id.clone();
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let tg = state
            .target_groups
            .get_mut(&arn)
            .ok_or_else(|| format!("TargetGroup {arn} no longer exists"))?;
        if let Some(s) = props.get("HealthCheckProtocol").and_then(|v| v.as_str()) {
            tg.health_check_protocol = Some(s.to_string());
        }
        if let Some(s) = props.get("HealthCheckPort").and_then(|v| v.as_str()) {
            tg.health_check_port = Some(s.to_string());
        }
        if let Some(b) = props.get("HealthCheckEnabled").and_then(|v| v.as_bool()) {
            tg.health_check_enabled = b;
        }
        if let Some(s) = props.get("HealthCheckPath").and_then(|v| v.as_str()) {
            tg.health_check_path = Some(s.to_string());
        }
        if let Some(n) = props.get("HealthCheckIntervalSeconds").and_then(cfn_as_i64) {
            tg.health_check_interval_seconds = n as i32;
        }
        if let Some(n) = props.get("HealthCheckTimeoutSeconds").and_then(cfn_as_i64) {
            tg.health_check_timeout_seconds = n as i32;
        }
        if let Some(n) = props.get("HealthyThresholdCount").and_then(cfn_as_i64) {
            tg.healthy_threshold_count = n as i32;
        }
        if let Some(n) = props.get("UnhealthyThresholdCount").and_then(cfn_as_i64) {
            tg.unhealthy_threshold_count = n as i32;
        }
        if let Some(matcher) = props.get("Matcher") {
            tg.matcher_http_code = matcher
                .get("HttpCode")
                .and_then(|v| v.as_str())
                .map(|s| s.to_string());
            tg.matcher_grpc_code = matcher
                .get("GrpcCode")
                .and_then(|v| v.as_str())
                .map(|s| s.to_string());
        }
        if props.get("Tags").is_some() {
            tg.tags = parse_elb_tags(props.get("Tags"));
        }
        let name = tg.name.clone();
        let tg_full = arn
            .rsplit("targetgroup/")
            .next()
            .map(|s| format!("targetgroup/{s}"))
            .unwrap_or_default();
        Ok(ProvisionResult::new(arn.clone())
            .with("TargetGroupArn", arn)
            .with("TargetGroupName", name)
            .with("TargetGroupFullName", tg_full))
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::Listener. Mirrors
    /// ModifyListener: port, protocol, default actions, certs, ssl policy.
    fn update_elbv2_listener(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let arn = existing.physical_id.clone();
        let new_default_actions = props
            .get("DefaultActions")
            .map(|v| parse_elb_actions(Some(v)));
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let listener = state
            .listeners
            .get_mut(&arn)
            .ok_or_else(|| format!("Listener {arn} no longer exists"))?;
        if let Some(n) = props.get("Port").and_then(cfn_as_i64) {
            listener.port = Some(n as i32);
        }
        if let Some(s) = props.get("Protocol").and_then(|v| v.as_str()) {
            listener.protocol = Some(s.to_string());
        }
        if let Some(s) = props.get("SslPolicy").and_then(|v| v.as_str()) {
            listener.ssl_policy = Some(s.to_string());
        }
        if let Some(actions) = new_default_actions {
            listener.default_actions = actions;
        }
        if props.get("Tags").is_some() {
            listener.tags = parse_elb_tags(props.get("Tags"));
        }
        Ok(ProvisionResult::new(arn.clone()).with("ListenerArn", arn))
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::ListenerRule. Mirrors
    /// ModifyRule + SetRulePriorities.
    fn update_elbv2_listener_rule(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let arn = existing.physical_id.clone();
        let new_actions = props.get("Actions").map(|v| parse_elb_actions(Some(v)));
        let new_conditions = props
            .get("Conditions")
            .map(|v| parse_elb_rule_conditions(Some(v)));
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let rule = state
            .rules
            .get_mut(&arn)
            .ok_or_else(|| format!("ListenerRule {arn} no longer exists"))?;
        if let Some(v) = props.get("Priority") {
            rule.priority = if let Some(s) = v.as_str() {
                s.to_string()
            } else if let Some(n) = v.as_i64() {
                n.to_string()
            } else {
                rule.priority.clone()
            };
        }
        if let Some(actions) = new_actions {
            rule.actions = actions;
        }
        if let Some(conditions) = new_conditions {
            rule.conditions = conditions;
        }
        if props.get("Tags").is_some() {
            rule.tags = parse_elb_tags(props.get("Tags"));
        }
        Ok(ProvisionResult::new(arn.clone()).with("RuleArn", arn))
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::ListenerCertificate.
    /// CFN treats this as replace-on-cert-list-change in real AWS, but we
    /// can rebuild the SNI cert set against the same physical id without
    /// disrupting the listener.
    fn update_elbv2_listener_certificate(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let physical_id = existing.physical_id.clone();
        let listener_arn = props
            .get("ListenerArn")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string())
            .or_else(|| physical_id.split_once('#').map(|(l, _)| l.to_string()))
            .ok_or_else(|| "ListenerArn is required".to_string())?;
        let new_certs: Vec<String> = props
            .get("Certificates")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|c| c.get("CertificateArn").and_then(|v| v.as_str()))
                    .map(|s| s.to_string())
                    .collect()
            })
            .unwrap_or_default();
        if new_certs.is_empty() {
            return Err("Certificates must contain at least one CertificateArn".to_string());
        }

        // Strip the previously-managed certs, then attach the new set.
        let prev_certs: Vec<String> = physical_id
            .split_once('#')
            .map(|(_, list)| list.split(',').map(|s| s.to_string()).collect())
            .unwrap_or_default();

        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let listener = state
            .listeners
            .get_mut(&listener_arn)
            .ok_or_else(|| format!("Listener {listener_arn} does not exist"))?;
        listener
            .certificates
            .retain(|c| !prev_certs.iter().any(|p| p == &c.certificate_arn));
        for arn in &new_certs {
            listener.certificates.retain(|c| &c.certificate_arn != arn);
            listener.certificates.push(fakecloud_elbv2::Certificate {
                certificate_arn: arn.clone(),
                is_default: false,
            });
        }
        Ok(ProvisionResult::new(format!(
            "{}#{}",
            listener_arn,
            new_certs.join(",")
        )))
    }

    /// In-place update for AWS::ElasticLoadBalancingV2::TrustStore. Only the
    /// CA bundle and tags are mutable; name is immutable in real AWS.
    fn update_elbv2_trust_store(
        &self,
        existing: &StackResource,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let arn = existing.physical_id.clone();
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let ts = state
            .trust_stores
            .get_mut(&arn)
            .ok_or_else(|| format!("TrustStore {arn} no longer exists"))?;
        let new_bucket = props
            .get("CaCertificatesBundleS3Bucket")
            .and_then(|v| v.as_str());
        let new_key = props
            .get("CaCertificatesBundleS3Key")
            .and_then(|v| v.as_str());
        if let (Some(b), Some(k)) = (new_bucket, new_key) {
            ts.ca_certificates_bundle = Some(format!("s3://{b}/{k}").into_bytes());
        }
        if let Some(arr) = props.get("Tags").and_then(|v| v.as_array()) {
            ts.tags = arr
                .iter()
                .filter_map(|t| {
                    let k = t.get("Key").and_then(|v| v.as_str())?;
                    let v = t.get("Value").and_then(|v| v.as_str()).unwrap_or("");
                    Some(fakecloud_elbv2::Tag {
                        key: k.to_string(),
                        value: v.to_string(),
                    })
                })
                .collect();
        }
        let name = ts.name.clone();
        let status = ts.status.clone();
        Ok(ProvisionResult::new(arn.clone())
            .with("TrustStoreArn", arn)
            .with("Name", name)
            .with("Status", status))
    }

    /// Live-state GetAtt fallback for AWS::ElasticLoadBalancingV2::LoadBalancer.
    fn get_att_elbv2_load_balancer(&self, physical_id: &str, attribute: &str) -> Option<String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let lb = state.load_balancers.get(physical_id)?;
        let lb_full = lb
            .arn
            .rsplit("loadbalancer/")
            .next()
            .unwrap_or("")
            .to_string();
        match attribute {
            "Arn" | "LoadBalancerArn" => Some(lb.arn.clone()),
            "DNSName" => Some(lb.dns_name.clone()),
            "CanonicalHostedZoneID" => Some(lb.canonical_hosted_zone_id.clone()),
            "LoadBalancerFullName" => Some(lb_full),
            "LoadBalancerName" => Some(lb.name.clone()),
            "SecurityGroups" => Some(lb.security_groups.join(",")),
            _ => None,
        }
    }

    /// Live-state GetAtt fallback for AWS::ElasticLoadBalancingV2::TargetGroup.
    fn get_att_elbv2_target_group(&self, physical_id: &str, attribute: &str) -> Option<String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let tg = state.target_groups.get(physical_id)?;
        let tg_full = tg
            .arn
            .rsplit("targetgroup/")
            .next()
            .map(|s| format!("targetgroup/{s}"))
            .unwrap_or_default();
        match attribute {
            "TargetGroupArn" => Some(tg.arn.clone()),
            "TargetGroupName" => Some(tg.name.clone()),
            "TargetGroupFullName" => Some(tg_full),
            "LoadBalancerArns" => Some(tg.load_balancer_arns.join(",")),
            _ => None,
        }
    }

    /// Live-state GetAtt fallback for AWS::ElasticLoadBalancingV2::Listener.
    fn get_att_elbv2_listener(&self, physical_id: &str, attribute: &str) -> Option<String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let listener = state.listeners.get(physical_id)?;
        match attribute {
            "Arn" | "ListenerArn" => Some(listener.arn.clone()),
            _ => None,
        }
    }

    /// Live-state GetAtt fallback for AWS::ElasticLoadBalancingV2::ListenerRule.
    fn get_att_elbv2_listener_rule(&self, physical_id: &str, attribute: &str) -> Option<String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let rule = state.rules.get(physical_id)?;
        match attribute {
            "RuleArn" => Some(rule.arn.clone()),
            "IsDefault" => Some(rule.is_default.to_string()),
            _ => None,
        }
    }

    /// Live-state GetAtt fallback for AWS::ElasticLoadBalancingV2::TrustStore.
    fn get_att_elbv2_trust_store(&self, physical_id: &str, attribute: &str) -> Option<String> {
        let mut accounts = self.elbv2_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let ts = state.trust_stores.get(physical_id)?;
        match attribute {
            "TrustStoreArn" => Some(ts.arn.clone()),
            "Name" => Some(ts.name.clone()),
            "Status" => Some(ts.status.clone()),
            "NumberOfCaCertificates" => Some(ts.number_of_ca_certificates.to_string()),
            "TotalRevokedEntries" => Some(ts.total_revoked_entries.to_string()),
            _ => None,
        }
    }

    // --- Organizations ---

    fn create_organization(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let feature_set = props
            .get("FeatureSet")
            .and_then(|v| v.as_str())
            .unwrap_or("ALL")
            .to_string();

        let mut org = self.organizations_state.write();
        if org.is_some() {
            return Err("Organization already exists; only one per fakecloud process".to_string());
        }
        let mut state = OrganizationState::bootstrap(&self.account_id);
        state.feature_set = feature_set;
        let org_id = state.org_id.clone();
        let org_arn = state.org_arn.clone();
        let mgmt_arn = state.management_account_arn.clone();
        let root_id = state.root_id.clone();
        *org = Some(state);

        Ok(ProvisionResult::new(org_id.clone())
            .with("Id", org_id)
            .with("Arn", org_arn)
            .with("ManagementAccountArn", mgmt_arn)
            .with("RootId", root_id))
    }

    fn delete_organization(&self, _physical_id: &str) -> Result<(), String> {
        let mut org = self.organizations_state.write();
        *org = None;
        Ok(())
    }

    fn create_organization_unit(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let parent_id = props
            .get("ParentId")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ParentId is required".to_string())?
            .to_string();

        let mut org_lock = self.organizations_state.write();
        let org = org_lock
            .as_mut()
            .ok_or_else(|| "Organization not yet created".to_string())?;
        // Accept root id, OU id, or `Ref`-resolved logical id (we map to root).
        let resolved_parent_id = if parent_id == org.root_id || org.ous.contains_key(&parent_id) {
            parent_id
        } else {
            return Err(format!("Parent {parent_id} does not exist"));
        };
        let id_suffix: String = Uuid::new_v4()
            .simple()
            .to_string()
            .chars()
            .take(8)
            .collect();
        let id = format!("ou-{}-{}", &org.root_id[2..], id_suffix);
        let arn = format!(
            "arn:aws:organizations::{}:ou/{}/{}",
            org.management_account_id, org.org_id, id
        );
        org.ous.insert(
            id.clone(),
            OrganizationalUnit {
                id: id.clone(),
                arn: arn.clone(),
                name: name.clone(),
                parent_id: resolved_parent_id,
            },
        );
        Ok(ProvisionResult::new(id.clone())
            .with("Id", id)
            .with("Arn", arn)
            .with("Name", name))
    }

    fn delete_organization_unit(&self, physical_id: &str) -> Result<(), String> {
        let mut org_lock = self.organizations_state.write();
        if let Some(org) = org_lock.as_mut() {
            org.ous.remove(physical_id);
            org.attachments.remove(physical_id);
        }
        Ok(())
    }

    /// Provision an `AWS::Organizations::Account`. Mints a new member
    /// account synchronously (via Organizations state), optionally moves
    /// it under the first ParentId when supplied, and persists tags.
    fn create_organization_account(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let email = props
            .get("Email")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "Email is required".to_string())?
            .to_string();
        let name = props
            .get("AccountName")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "AccountName is required".to_string())?
            .to_string();
        let parent_ids: Vec<String> = props
            .get("ParentIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(|s| s.to_string()))
                    .collect()
            })
            .unwrap_or_default();
        let tags: Vec<(String, String)> = props
            .get("Tags")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|t| {
                        let k = t.get("Key").and_then(|v| v.as_str())?;
                        let val = t.get("Value").and_then(|v| v.as_str()).unwrap_or("");
                        Some((k.to_string(), val.to_string()))
                    })
                    .collect()
            })
            .unwrap_or_default();

        let mut org_lock = self.organizations_state.write();
        let org = org_lock
            .as_mut()
            .ok_or_else(|| "Organization not yet created".to_string())?;
        // CFN provisioning is its own asynchronous flow; we don't need
        // a second layer of poll-for-completion on top. Begin the
        // request and immediately drive it to SUCCEEDED so the rest of
        // this provisioner sees a fully enrolled account.
        let pending = org.begin_create_account(&email, &name, None);
        let status = org.complete_create_account(&pending.id).unwrap_or(pending);
        let account_id = status
            .account_id
            .clone()
            .ok_or_else(|| "create_account did not return an account id".to_string())?;
        let account_arn = org
            .accounts
            .get(&account_id)
            .map(|a| a.arn.clone())
            .unwrap_or_default();
        let joined_method = org
            .accounts
            .get(&account_id)
            .map(|a| a.joined_method.clone())
            .unwrap_or_else(|| "CREATED".to_string());
        let joined_timestamp = org
            .accounts
            .get(&account_id)
            .map(|a| a.joined_timestamp.to_rfc3339())
            .unwrap_or_default();
        let acct_status = org
            .accounts
            .get(&account_id)
            .map(|a| a.status.clone())
            .unwrap_or_else(|| "ACTIVE".to_string());

        if let Some(parent) = parent_ids.first() {
            let source = org
                .accounts
                .get(&account_id)
                .map(|a| a.parent_id.clone())
                .unwrap_or_else(|| org.root_id.clone());
            if parent != &source {
                org.move_account(&account_id, &source, parent)
                    .map_err(|e| format!("Failed to move account to parent {parent}: {e:?}"))?;
            }
        }

        if !tags.is_empty() {
            org.set_resource_tags(&account_id, &tags);
        }

        Ok(ProvisionResult::new(account_id.clone())
            .with("AccountId", account_id)
            .with("AccountName", name)
            .with("Email", email)
            .with("Arn", account_arn)
            .with("JoinedMethod", joined_method)
            .with("JoinedTimestamp", joined_timestamp)
            .with("Status", acct_status))
    }

    /// Close the member account on stack delete. Real AWS leaves the
    /// account in `SUSPENDED` for 90 days; we just flip it via
    /// `close_account` so subsequent reads see it as suspended.
    fn delete_organization_account(&self, physical_id: &str) -> Result<(), String> {
        let mut org_lock = self.organizations_state.write();
        if let Some(org) = org_lock.as_mut() {
            let _ = org.close_account(physical_id);
        }
        Ok(())
    }

    fn create_organization_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let description = props
            .get("Description")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let policy_type = props
            .get("Type")
            .and_then(|v| v.as_str())
            .unwrap_or(POLICY_TYPE_SCP)
            .to_string();
        let content = props
            .get("Content")
            .map(|v| {
                if v.is_string() {
                    v.as_str().unwrap_or("").to_string()
                } else {
                    serde_json::to_string(v).unwrap_or_default()
                }
            })
            .unwrap_or_default();
        let target_ids: Vec<String> = props
            .get("TargetIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|t| t.as_str().map(|s| s.to_string()))
                    .collect()
            })
            .unwrap_or_default();

        let mut org_lock = self.organizations_state.write();
        let org = org_lock
            .as_mut()
            .ok_or_else(|| "Organization not yet created".to_string())?;
        let id_suffix: String = Uuid::new_v4()
            .simple()
            .to_string()
            .chars()
            .take(8)
            .collect();
        let id = format!("p-{}", id_suffix);
        let arn = format!(
            "arn:aws:organizations::{}:policy/{}/{}/{}",
            org.management_account_id,
            org.org_id,
            policy_type.to_lowercase(),
            id
        );
        org.policies.insert(
            id.clone(),
            OrgPolicy {
                id: id.clone(),
                arn: arn.clone(),
                name: name.clone(),
                description,
                policy_type,
                aws_managed: false,
                content,
            },
        );
        for target in target_ids {
            org.attachments
                .entry(target)
                .or_default()
                .insert(id.clone());
        }
        Ok(ProvisionResult::new(id.clone())
            .with("Id", id)
            .with("Arn", arn)
            .with("Name", name))
    }

    fn delete_organization_policy(&self, physical_id: &str) -> Result<(), String> {
        let mut org_lock = self.organizations_state.write();
        if let Some(org) = org_lock.as_mut() {
            org.policies.remove(physical_id);
            for attachments in org.attachments.values_mut() {
                attachments.remove(physical_id);
            }
        }
        Ok(())
    }

    fn create_organization_resource_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let content = props
            .get("Content")
            .map(|v| {
                if v.is_string() {
                    v.as_str().unwrap_or("").to_string()
                } else {
                    serde_json::to_string(v).unwrap_or_default()
                }
            })
            .ok_or_else(|| "Content is required".to_string())?;

        let mut org_lock = self.organizations_state.write();
        let org = org_lock
            .as_mut()
            .ok_or_else(|| "Organization not yet created".to_string())?;
        org.resource_policy = Some(content);
        let arn = format!(
            "arn:aws:organizations::{}:resourcepolicy/{}/rp",
            org.management_account_id, org.org_id
        );
        Ok(ProvisionResult::new(arn.clone()).with("Arn", arn))
    }

    fn delete_organization_resource_policy(&self, _physical_id: &str) -> Result<(), String> {
        let mut org_lock = self.organizations_state.write();
        if let Some(org) = org_lock.as_mut() {
            org.resource_policy = None;
        }
        Ok(())
    }

    fn delete_log_group(&self, physical_id: &str) -> Result<(), String> {
        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.default_mut();
        // physical_id is the ARN; find the log group name
        let name = state
            .log_groups
            .iter()
            .find(|(_, g)| g.arn == physical_id)
            .map(|(name, _)| name.clone());
        if let Some(name) = name {
            state.log_groups.remove(&name);
        }
        Ok(())
    }

    fn create_log_stream(&self, resource: &ResourceDefinition) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let log_group_name = props
            .get("LogGroupName")
            .and_then(|v| v.as_str())
            .map(parse_log_group_name)
            .ok_or_else(|| "LogGroupName is required".to_string())?;
        let log_stream_name = props
            .get("LogStreamName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();

        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        let group = state
            .log_groups
            .get_mut(&log_group_name)
            .ok_or_else(|| format!("Log group {log_group_name} does not exist"))?;
        let arn = format!(
            "arn:aws:logs:{}:{}:log-group:{}:log-stream:{}",
            self.region, self.account_id, log_group_name, log_stream_name
        );
        if group.log_streams.contains_key(&log_stream_name) {
            return Err(format!(
                "Log stream {log_stream_name} already exists in {log_group_name}"
            ));
        }
        group.log_streams.insert(
            log_stream_name.clone(),
            LogStream {
                name: log_stream_name.clone(),
                arn,
                creation_time: Utc::now().timestamp_millis(),
                first_event_timestamp: None,
                last_event_timestamp: None,
                last_ingestion_time: None,
                upload_sequence_token: String::new(),
                events: Vec::new(),
            },
        );

        // Encode group + stream into the physical id so deletion can target both.
        let physical_id = format!("{log_group_name}|{log_stream_name}");
        Ok(ProvisionResult::new(physical_id))
    }

    fn delete_log_stream(&self, physical_id: &str) -> Result<(), String> {
        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        if let Some((group_name, stream_name)) = physical_id.split_once('|') {
            if let Some(group) = state.log_groups.get_mut(group_name) {
                group.log_streams.remove(stream_name);
            }
        }
        Ok(())
    }

    fn create_metric_filter(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let log_group_name = props
            .get("LogGroupName")
            .and_then(|v| v.as_str())
            .map(parse_log_group_name)
            .ok_or_else(|| "LogGroupName is required".to_string())?;
        let filter_name = props
            .get("FilterName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let filter_pattern = props
            .get("FilterPattern")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();

        let mut transformations: Vec<MetricTransformation> = Vec::new();
        if let Some(arr) = props
            .get("MetricTransformations")
            .and_then(|v| v.as_array())
        {
            for t in arr {
                let metric_name = t
                    .get("MetricName")
                    .and_then(|v| v.as_str())
                    .unwrap_or("")
                    .to_string();
                let metric_namespace = t
                    .get("MetricNamespace")
                    .and_then(|v| v.as_str())
                    .unwrap_or("")
                    .to_string();
                let metric_value = t
                    .get("MetricValue")
                    .and_then(|v| v.as_str())
                    .unwrap_or("1")
                    .to_string();
                let default_value = t.get("DefaultValue").and_then(|v| v.as_f64());
                let unit = t
                    .get("Unit")
                    .and_then(|v| v.as_str())
                    .map(|s| s.to_string());
                transformations.push(MetricTransformation {
                    metric_name,
                    metric_namespace,
                    metric_value,
                    default_value,
                    unit,
                });
            }
        }

        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        if !state.log_groups.contains_key(&log_group_name) {
            return Err(format!("Log group {log_group_name} does not exist"));
        }
        state
            .metric_filters
            .retain(|f| !(f.log_group_name == log_group_name && f.filter_name == filter_name));
        state.metric_filters.push(MetricFilter {
            filter_name: filter_name.clone(),
            filter_pattern,
            log_group_name: log_group_name.clone(),
            metric_transformations: transformations,
            creation_time: Utc::now().timestamp_millis(),
        });

        Ok(ProvisionResult::new(format!(
            "{log_group_name}|{filter_name}"
        )))
    }

    fn delete_metric_filter(&self, physical_id: &str) -> Result<(), String> {
        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        if let Some((group_name, filter_name)) = physical_id.split_once('|') {
            state
                .metric_filters
                .retain(|f| !(f.log_group_name == group_name && f.filter_name == filter_name));
        }
        Ok(())
    }

    fn create_subscription_filter(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let log_group_name = props
            .get("LogGroupName")
            .and_then(|v| v.as_str())
            .map(parse_log_group_name)
            .ok_or_else(|| "LogGroupName is required".to_string())?;
        let filter_name = props
            .get("FilterName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let filter_pattern = props
            .get("FilterPattern")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let destination_arn = props
            .get("DestinationArn")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "DestinationArn is required".to_string())?
            .to_string();
        let role_arn = props
            .get("RoleArn")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let distribution = props
            .get("Distribution")
            .and_then(|v| v.as_str())
            .unwrap_or("ByLogStream")
            .to_string();

        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        let group = state
            .log_groups
            .get_mut(&log_group_name)
            .ok_or_else(|| format!("Log group {log_group_name} does not exist"))?;
        group
            .subscription_filters
            .retain(|f| f.filter_name != filter_name);
        group.subscription_filters.push(SubscriptionFilter {
            filter_name: filter_name.clone(),
            log_group_name: log_group_name.clone(),
            filter_pattern,
            destination_arn,
            role_arn,
            distribution,
            creation_time: Utc::now().timestamp_millis(),
        });

        Ok(ProvisionResult::new(format!(
            "{log_group_name}|{filter_name}"
        )))
    }

    fn delete_subscription_filter(&self, physical_id: &str) -> Result<(), String> {
        let mut logs_accounts = self.logs_state.write();
        let state = logs_accounts.get_or_create(&self.account_id);
        if let Some((group_name, filter_name)) = physical_id.split_once('|') {
            if let Some(group) = state.log_groups.get_mut(group_name) {
                group
                    .subscription_filters
                    .retain(|f| f.filter_name != filter_name);
            }
        }
        Ok(())
    }

    // --- Custom Resources ---

    /// Invoke a Lambda function synchronously via the delivery bus.
    fn invoke_lambda_sync(&self, function_arn: &str, payload: &str) -> Result<(), String> {
        let delivery = self.delivery.clone();
        let function_arn = function_arn.to_string();
        let payload = payload.to_string();
        std::thread::scope(|s| {
            s.spawn(|| {
                let rt = tokio::runtime::Builder::new_current_thread()
                    .enable_all()
                    .build()
                    .map_err(|e| format!("Failed to create runtime: {e}"))?;
                rt.block_on(async {
                    match delivery.invoke_lambda(&function_arn, &payload).await {
                        Some(Ok(_)) => {
                            tracing::info!(
                                "Custom resource Lambda {} invoked successfully",
                                function_arn
                            );
                            Ok(())
                        }
                        Some(Err(e)) => {
                            tracing::warn!(
                                "Custom resource Lambda {} invocation failed: {e}",
                                function_arn
                            );
                            Err(format!("Lambda invocation failed: {e}"))
                        }
                        None => {
                            tracing::warn!(
                                "No Lambda delivery configured; skipping custom resource invocation for {}",
                                function_arn
                            );
                            Ok(())
                        }
                    }
                })
            })
            .join()
            .map_err(|_| "Lambda invocation thread panicked".to_string())?
        })
    }

    fn create_custom_resource(&self, resource: &ResourceDefinition) -> Result<String, String> {
        let props = &resource.properties;
        let service_token = props
            .get("ServiceToken")
            .and_then(|v| v.as_str())
            .ok_or("Custom resource requires ServiceToken property")?;

        let request_id = Uuid::new_v4().to_string();

        // Build the CloudFormation custom resource event
        let event = serde_json::json!({
            "RequestType": "Create",
            "ServiceToken": service_token,
            "StackId": self.stack_id,
            "RequestId": request_id,
            "ResourceType": resource.resource_type,
            "LogicalResourceId": resource.logical_id,
            "ResourceProperties": props,
        });

        let payload = serde_json::to_string(&event).map_err(|e| e.to_string())?;
        self.invoke_lambda_sync(service_token, &payload)?;

        // Physical resource ID: use a generated ID (the Lambda could return one,
        // but for simplicity we generate one here).
        let physical_id = format!("{}-{}", resource.logical_id, &request_id[..8]);
        Ok(physical_id)
    }

    fn delete_custom_resource(&self, resource: &StackResource) -> Result<(), String> {
        let service_token = match &resource.service_token {
            Some(token) => token.clone(),
            None => {
                // No ServiceToken stored — nothing to invoke
                return Ok(());
            }
        };

        let request_id = Uuid::new_v4().to_string();

        let event = serde_json::json!({
            "RequestType": "Delete",
            "ServiceToken": service_token,
            "StackId": self.stack_id,
            "RequestId": request_id,
            "ResourceType": resource.resource_type,
            "LogicalResourceId": resource.logical_id,
            "PhysicalResourceId": resource.physical_id,
        });

        let payload = serde_json::to_string(&event).map_err(|e| e.to_string())?;

        // Best-effort: don't fail stack deletion if Lambda invocation fails
        if let Err(e) = self.invoke_lambda_sync(&service_token, &payload) {
            tracing::warn!(
                "Custom resource delete Lambda invocation failed for {}: {e}",
                resource.logical_id
            );
        }
        Ok(())
    }

    // --- Application Auto Scaling ---

    fn create_application_autoscaling_scalable_target(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let service_namespace = props
            .get("ServiceNamespace")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ServiceNamespace is required".to_string())?
            .to_string();
        let resource_id = props
            .get("ResourceId")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ResourceId is required".to_string())?
            .to_string();
        let scalable_dimension = props
            .get("ScalableDimension")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ScalableDimension is required".to_string())?
            .to_string();
        let min_capacity = props
            .get("MinCapacity")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .ok_or_else(|| "MinCapacity is required".to_string())?;
        let max_capacity = props
            .get("MaxCapacity")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .ok_or_else(|| "MaxCapacity is required".to_string())?;
        if min_capacity > max_capacity {
            return Err("MinCapacity must be <= MaxCapacity".to_string());
        }
        let role_arn = props
            .get("RoleARN")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let suspended_state = props.get("SuspendedState").map(|v| AppasSuspendedState {
            dynamic_scaling_in_suspended: v
                .get("DynamicScalingInSuspended")
                .and_then(|x| x.as_bool()),
            dynamic_scaling_out_suspended: v
                .get("DynamicScalingOutSuspended")
                .and_then(|x| x.as_bool()),
            scheduled_scaling_suspended: v
                .get("ScheduledScalingSuspended")
                .and_then(|x| x.as_bool()),
        });

        let arn = format!(
            "arn:aws:application-autoscaling:{}:{}:scalable-target/{}",
            self.region,
            self.account_id,
            &Uuid::new_v4().simple().to_string()[..10]
        );
        let role = role_arn.unwrap_or_else(|| {
            let suffix = match service_namespace.as_str() {
                "ecs" => "ECSService",
                "elasticmapreduce" => "EMRContainerService",
                "ec2" => "EC2SpotFleetRequest",
                "appstream" => "ApplicationAutoScaling_AppStreamFleet",
                "dynamodb" => "DynamoDBTable",
                "rds" => "RDSCluster",
                "sagemaker" => "SageMakerEndpoint",
                "lambda" => "LambdaConcurrency",
                "elasticache" => "ElastiCacheRG",
                "cassandra" => "CassandraTable",
                "kafka" => "KafkaCluster",
                _ => "ApplicationAutoScaling_Default",
            };
            format!(
                "arn:aws:iam::{}:role/aws-service-role/applicationautoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_{}",
                self.account_id, suffix
            )
        });

        let mut state = self.app_autoscaling_state.write();
        let account = state.accounts.entry(self.account_id.clone()).or_default();
        let key = (
            service_namespace.clone(),
            resource_id.clone(),
            scalable_dimension.clone(),
        );
        let target = AppasScalableTarget {
            arn: arn.clone(),
            service_namespace: service_namespace.clone(),
            resource_id: resource_id.clone(),
            scalable_dimension: scalable_dimension.clone(),
            min_capacity,
            max_capacity,
            role_arn: role,
            creation_time: Utc::now(),
            suspended_state,
            predicted_capacity: None,
        };
        account.scalable_targets.insert(key, target);

        Ok(ProvisionResult::new(resource_id.clone())
            .with("ScalableTargetARN", arn)
            .with("ServiceNamespace", service_namespace)
            .with("ScalableDimension", scalable_dimension))
    }

    fn create_application_autoscaling_scaling_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let policy_name = props
            .get("PolicyName")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "PolicyName is required".to_string())?
            .to_string();
        let service_namespace = props
            .get("ServiceNamespace")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ServiceNamespace is required".to_string())?
            .to_string();
        let resource_id = props
            .get("ResourceId")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ResourceId is required".to_string())?
            .to_string();
        let scalable_dimension = props
            .get("ScalableDimension")
            .and_then(|v| v.as_str())
            .ok_or_else(|| "ScalableDimension is required".to_string())?
            .to_string();
        let policy_type = props
            .get("PolicyType")
            .and_then(|v| v.as_str())
            .unwrap_or("StepScaling")
            .to_string();
        let step_cfg = props.get("StepScalingPolicyConfiguration").cloned();
        let tt_cfg = props
            .get("TargetTrackingScalingPolicyConfiguration")
            .cloned();
        let pred_cfg = props.get("PredictiveScalingPolicyConfiguration").cloned();

        let target_key = (
            service_namespace.clone(),
            resource_id.clone(),
            scalable_dimension.clone(),
        );
        let policy_key = (
            service_namespace.clone(),
            resource_id.clone(),
            scalable_dimension.clone(),
            policy_name.clone(),
        );

        let mut state = self.app_autoscaling_state.write();
        let account = state.accounts.entry(self.account_id.clone()).or_default();
        if !account.scalable_targets.contains_key(&target_key) {
            return Err(format!(
                "No scalable target registered for ServiceNamespace={} ResourceId={} ScalableDimension={}",
                service_namespace, resource_id, scalable_dimension
            ));
        }
        let arn = format!(
            "arn:aws:autoscaling:{}:{}:scalingPolicy:{}:resource/{}/{}:policyName/{}",
            self.region,
            self.account_id,
            Uuid::new_v4(),
            service_namespace,
            resource_id,
            policy_name
        );
        let policy = AppasScalingPolicy {
            arn: arn.clone(),
            policy_name: policy_name.clone(),
            service_namespace: service_namespace.clone(),
            resource_id: resource_id.clone(),
            scalable_dimension: scalable_dimension.clone(),
            policy_type: policy_type.clone(),
            creation_time: Utc::now(),
            step_scaling_policy_configuration: step_cfg,
            target_tracking_scaling_policy_configuration: tt_cfg,
            predictive_scaling_policy_configuration: pred_cfg,
            alarms: Vec::new(),
            last_applied_at: None,
        };
        account.scaling_policies.insert(policy_key, policy);

        Ok(ProvisionResult::new(arn.clone())
            .with("PolicyName", policy_name)
            .with("ServiceNamespace", service_namespace)
            .with("ResourceId", resource_id)
            .with("ScalableDimension", scalable_dimension))
    }

    fn delete_application_autoscaling_scalable_target(
        &self,
        physical_id: &str,
        attributes: &BTreeMap<String, String>,
    ) -> Result<(), String> {
        let namespace = attributes
            .get("ServiceNamespace")
            .cloned()
            .ok_or_else(|| "ServiceNamespace missing in attributes".to_string())?;
        let resource_id = physical_id.to_string();
        let dimension = attributes
            .get("ScalableDimension")
            .cloned()
            .ok_or_else(|| "ScalableDimension missing in attributes".to_string())?;
        let key = (namespace, resource_id.clone(), dimension);

        let mut state = self.app_autoscaling_state.write();
        let account = state.accounts.entry(self.account_id.clone()).or_default();
        account.scalable_targets.remove(&key);
        account
            .scaling_policies
            .retain(|k, _| !(k.0 == key.0 && k.1 == key.1 && k.2 == key.2));
        account
            .scheduled_actions
            .retain(|k, _| !(k.0 == key.0 && k.1 == key.1 && k.2 == key.2));
        Ok(())
    }

    fn delete_application_autoscaling_scaling_policy(
        &self,
        _physical_id: &str,
        attributes: &BTreeMap<String, String>,
    ) -> Result<(), String> {
        let policy_name = attributes
            .get("PolicyName")
            .cloned()
            .ok_or_else(|| "PolicyName missing in attributes".to_string())?;
        let namespace = attributes
            .get("ServiceNamespace")
            .cloned()
            .ok_or_else(|| "ServiceNamespace missing in attributes".to_string())?;
        let resource_id = attributes
            .get("ResourceId")
            .cloned()
            .ok_or_else(|| "ResourceId missing in attributes".to_string())?;
        let dimension = attributes
            .get("ScalableDimension")
            .cloned()
            .ok_or_else(|| "ScalableDimension missing in attributes".to_string())?;
        let key = (namespace, resource_id, dimension, policy_name);

        let mut state = self.app_autoscaling_state.write();
        let account = state.accounts.entry(self.account_id.clone()).or_default();
        account.scaling_policies.remove(&key);
        Ok(())
    }

    // --- ElastiCache ---

    fn create_ec_parameter_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("CacheParameterGroupName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let family = props
            .get("CacheParameterGroupFamily")
            .and_then(|v| v.as_str())
            .unwrap_or("redis7")
            .to_string();
        let description = props
            .get("Description")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let arn = format!(
            "arn:aws:elasticache:{}:{}:parametergroup:{}",
            self.region, self.account_id, name
        );
        let group = CacheParameterGroup {
            cache_parameter_group_name: name.clone(),
            cache_parameter_group_family: family,
            description,
            is_global: false,
            arn: arn.clone(),
        };
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        // ParameterGroups stored as Vec — replace any existing entry.
        state
            .parameter_groups
            .retain(|p| p.cache_parameter_group_name != name);
        state.parameter_groups.push(group);
        Ok(ProvisionResult::new(name).with("Arn", arn))
    }

    fn delete_ec_parameter_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state
            .parameter_groups
            .retain(|p| p.cache_parameter_group_name != physical_id);
        Ok(())
    }

    fn create_ec_subnet_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("CacheSubnetGroupName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let description = props
            .get("Description")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let subnet_ids: Vec<String> = props
            .get("SubnetIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(|s| s.to_string()))
                    .collect()
            })
            .unwrap_or_default();
        let arn = format!(
            "arn:aws:elasticache:{}:{}:subnetgroup:{}",
            self.region, self.account_id, name
        );
        let group = CacheSubnetGroup {
            cache_subnet_group_name: name.clone(),
            cache_subnet_group_description: description,
            vpc_id: String::new(),
            subnet_ids,
            arn: arn.clone(),
        };
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.subnet_groups.insert(name.clone(), group);
        Ok(ProvisionResult::new(name).with("Arn", arn))
    }

    fn delete_ec_subnet_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.subnet_groups.remove(physical_id);
        Ok(())
    }

    fn create_ec_security_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("CacheSecurityGroupName")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let description = props
            .get("Description")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let arn = format!(
            "arn:aws:elasticache:{}:{}:securitygroup:{}",
            self.region, self.account_id, name
        );
        let group = CacheSecurityGroup {
            cache_security_group_name: name.clone(),
            description,
            owner_id: self.account_id.clone(),
            arn: arn.clone(),
            ec2_security_groups: Vec::new(),
        };
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.security_groups.insert(name.clone(), group);
        Ok(ProvisionResult::new(name).with("Arn", arn))
    }

    fn delete_ec_security_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.security_groups.remove(physical_id);
        Ok(())
    }

    fn create_ec_user(&self, resource: &ResourceDefinition) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let user_id = props
            .get("UserId")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let user_name = props
            .get("UserName")
            .and_then(|v| v.as_str())
            .unwrap_or(&user_id)
            .to_string();
        let engine = props
            .get("Engine")
            .and_then(|v| v.as_str())
            .unwrap_or("redis")
            .to_string();
        let access_string = props
            .get("AccessString")
            .and_then(|v| v.as_str())
            .unwrap_or("on ~* +@all")
            .to_string();
        let authentication_type = props
            .get("AuthenticationMode")
            .and_then(|v| v.get("Type"))
            .and_then(|v| v.as_str())
            .unwrap_or("no-password-required")
            .to_string();
        let arn = format!(
            "arn:aws:elasticache:{}:{}:user:{}",
            self.region, self.account_id, user_id
        );
        let user = EcUser {
            user_id: user_id.clone(),
            user_name,
            engine,
            access_string,
            status: "active".to_string(),
            authentication_type,
            password_count: 0,
            arn: arn.clone(),
            minimum_engine_version: "6.0".to_string(),
            user_group_ids: Vec::new(),
        };
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.users.insert(user_id.clone(), user);
        Ok(ProvisionResult::new(user_id).with("Arn", arn))
    }

    fn delete_ec_user(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.users.remove(physical_id);
        Ok(())
    }

    fn create_ec_user_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let user_group_id = props
            .get("UserGroupId")
            .and_then(|v| v.as_str())
            .unwrap_or(&resource.logical_id)
            .to_string();
        let engine = props
            .get("Engine")
            .and_then(|v| v.as_str())
            .unwrap_or("redis")
            .to_string();
        let user_ids: Vec<String> = props
            .get("UserIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(|s| s.to_string()))
                    .collect()
            })
            .unwrap_or_default();
        let arn = format!(
            "arn:aws:elasticache:{}:{}:usergroup:{}",
            self.region, self.account_id, user_group_id
        );
        let group = EcUserGroup {
            user_group_id: user_group_id.clone(),
            engine,
            status: "active".to_string(),
            user_ids,
            arn: arn.clone(),
            minimum_engine_version: "6.0".to_string(),
            pending_changes: None,
            replication_groups: Vec::new(),
        };
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.user_groups.insert(user_group_id.clone(), group);
        Ok(ProvisionResult::new(user_group_id).with("Arn", arn))
    }

    fn delete_ec_user_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.user_groups.remove(physical_id);
        Ok(())
    }

    fn create_ec_cache_cluster(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let id = props
            .get("ClusterName")
            .and_then(|v| v.as_str())
            .map(String::from)
            .unwrap_or_else(|| format!("cfn-cc-{}", resource.logical_id.to_lowercase()));
        let cache_node_type = props
            .get("CacheNodeType")
            .and_then(|v| v.as_str())
            .unwrap_or("cache.t4g.micro")
            .to_string();
        let engine = props
            .get("Engine")
            .and_then(|v| v.as_str())
            .unwrap_or("redis")
            .to_string();
        let engine_version = props
            .get("EngineVersion")
            .and_then(|v| v.as_str())
            .unwrap_or("7.1")
            .to_string();
        let num_cache_nodes = props
            .get("NumCacheNodes")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .unwrap_or(1);
        let preferred_az = props
            .get("PreferredAvailabilityZone")
            .and_then(|v| v.as_str())
            .unwrap_or("us-east-1a")
            .to_string();
        let cache_subnet_group_name = props
            .get("CacheSubnetGroupName")
            .and_then(|v| v.as_str())
            .map(String::from);
        let auto_minor_version_upgrade = props
            .get("AutoMinorVersionUpgrade")
            .and_then(|v| v.as_bool())
            .unwrap_or(true);
        let default_port = if engine == "memcached" { 11211 } else { 6379 };
        let port = props
            .get("Port")
            .and_then(|v| v.as_i64())
            .map(|n| n as u16)
            .unwrap_or(default_port);
        let cache_parameter_group_name = props
            .get("CacheParameterGroupName")
            .and_then(|v| v.as_str())
            .map(String::from);
        let security_group_ids: Vec<String> = props
            .get("VpcSecurityGroupIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let cache_security_group_names: Vec<String> = props
            .get("CacheSecurityGroupNames")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let preferred_availability_zones: Vec<String> = props
            .get("PreferredAvailabilityZones")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let snapshot_arns: Vec<String> = props
            .get("SnapshotArns")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let snapshot_name = props
            .get("SnapshotName")
            .and_then(|v| v.as_str())
            .map(String::from);
        let snapshot_retention_limit = props
            .get("SnapshotRetentionLimit")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .unwrap_or(0);
        let snapshot_window = props
            .get("SnapshotWindow")
            .and_then(|v| v.as_str())
            .map(String::from);
        let preferred_maintenance_window = props
            .get("PreferredMaintenanceWindow")
            .and_then(|v| v.as_str())
            .map(String::from);
        let notification_topic_arn = props
            .get("NotificationTopicArn")
            .and_then(|v| v.as_str())
            .map(String::from);
        let transit_encryption_enabled = props
            .get("TransitEncryptionEnabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(false);
        let auth_token = props
            .get("AuthToken")
            .and_then(|v| v.as_str())
            .filter(|s| !s.is_empty())
            .map(String::from);
        let auth_token_enabled = auth_token.is_some();
        let network_type = props
            .get("NetworkType")
            .and_then(|v| v.as_str())
            .map(String::from)
            .or_else(|| Some("ipv4".to_string()));
        let ip_discovery = props
            .get("IpDiscovery")
            .and_then(|v| v.as_str())
            .map(String::from)
            .or_else(|| Some("ipv4".to_string()));
        let az_mode = props
            .get("AZMode")
            .and_then(|v| v.as_str())
            .map(String::from)
            .or_else(|| Some("single-az".to_string()));
        let outpost_mode = props
            .get("OutpostMode")
            .and_then(|v| v.as_str())
            .map(String::from);
        let preferred_outpost_arn = props
            .get("PreferredOutpostArn")
            .and_then(|v| v.as_str())
            .map(String::from);

        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let arn = format!(
            "arn:aws:elasticache:{}:{}:cluster:{}",
            state.region, state.account_id, id
        );
        let endpoint_address = format!("{id}.fakecloud.{}.cache.amazonaws.com", state.region);
        let cluster = EcCacheCluster {
            cache_cluster_id: id.clone(),
            cache_node_type,
            engine,
            engine_version,
            cache_cluster_status: "available".to_string(),
            num_cache_nodes,
            preferred_availability_zone: preferred_az,
            cache_subnet_group_name,
            auto_minor_version_upgrade,
            arn: arn.clone(),
            created_at: Utc::now().to_rfc3339(),
            endpoint_address: endpoint_address.clone(),
            endpoint_port: port,
            container_id: String::new(),
            host_port: 0,
            replication_group_id: None,
            cache_parameter_group_name,
            security_group_ids,
            log_delivery_configurations: Vec::new(),
            transit_encryption_enabled,
            at_rest_encryption_enabled: false,
            auth_token_enabled,
            port,
            preferred_maintenance_window,
            preferred_availability_zones,
            notification_topic_arn,
            cache_security_group_names,
            snapshot_arns,
            snapshot_name,
            snapshot_retention_limit,
            snapshot_window,
            outpost_mode,
            preferred_outpost_arn,
            network_type,
            ip_discovery,
            az_mode,
            auth_token,
            kms_key_id: None,
            transit_encryption_mode: None,
            data_tiering_enabled: None,
            cluster_mode: None,
            preferred_outpost_arns: Vec::new(),
        };
        state.cache_clusters.insert(id.clone(), cluster);
        Ok(ProvisionResult::new(id.clone())
            .with("Arn", arn)
            .with("RedisEndpoint.Address", endpoint_address.clone())
            .with("RedisEndpoint.Port", port.to_string())
            .with("ConfigurationEndpoint.Address", endpoint_address)
            .with("ConfigurationEndpoint.Port", port.to_string()))
    }

    fn delete_ec_cache_cluster(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.cache_clusters.remove(physical_id);
        Ok(())
    }

    fn create_ec_replication_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let id = props
            .get("ReplicationGroupId")
            .and_then(|v| v.as_str())
            .map(String::from)
            .unwrap_or_else(|| format!("cfn-rg-{}", resource.logical_id.to_lowercase()));
        let description = props
            .get("ReplicationGroupDescription")
            .and_then(|v| v.as_str())
            .unwrap_or("CFN-provisioned replication group")
            .to_string();
        let cache_node_type = props
            .get("CacheNodeType")
            .and_then(|v| v.as_str())
            .unwrap_or("cache.t4g.micro")
            .to_string();
        let engine = props
            .get("Engine")
            .and_then(|v| v.as_str())
            .unwrap_or("redis")
            .to_string();
        let engine_version = props
            .get("EngineVersion")
            .and_then(|v| v.as_str())
            .unwrap_or("7.1")
            .to_string();
        let num_cache_clusters = props
            .get("NumCacheClusters")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .unwrap_or(1);
        let num_node_groups = props
            .get("NumNodeGroups")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .unwrap_or(0);
        let replicas_per_node_group = props
            .get("ReplicasPerNodeGroup")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32);
        let automatic_failover_enabled = props
            .get("AutomaticFailoverEnabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(false);
        let multi_az_enabled = props
            .get("MultiAZEnabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(false);
        let transit_encryption_enabled = props
            .get("TransitEncryptionEnabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(false);
        let at_rest_encryption_enabled = props
            .get("AtRestEncryptionEnabled")
            .and_then(|v| v.as_bool())
            .unwrap_or(false);
        let kms_key_id = props
            .get("KmsKeyId")
            .and_then(|v| v.as_str())
            .map(String::from);
        let auth_token_enabled = props
            .get("AuthToken")
            .and_then(|v| v.as_str())
            .filter(|s| !s.is_empty())
            .is_some();
        let user_group_ids: Vec<String> = props
            .get("UserGroupIds")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let snapshot_retention_limit = props
            .get("SnapshotRetentionLimit")
            .and_then(|v| v.as_i64())
            .map(|n| n as i32)
            .unwrap_or(0);
        let snapshot_window = props
            .get("SnapshotWindow")
            .and_then(|v| v.as_str())
            .unwrap_or("00:00-01:00")
            .to_string();
        let port = props
            .get("Port")
            .and_then(|v| v.as_i64())
            .map(|n| n as u16)
            .unwrap_or(6379);
        let cluster_enabled = num_node_groups > 1
            || props
                .get("ClusterEnabled")
                .and_then(|v| v.as_bool())
                .unwrap_or(false);

        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        let arn = format!(
            "arn:aws:elasticache:{}:{}:replicationgroup:{}",
            state.region, state.account_id, id
        );
        let endpoint_address = format!(
            "{id}.fakecloud.ng.0001.{}.cache.amazonaws.com",
            state.region
        );
        let configuration_endpoint = if cluster_enabled {
            Some(format!(
                "{id}.fakecloud.cfg.{}.cache.amazonaws.com",
                state.region
            ))
        } else {
            None
        };

        let group = EcReplicationGroup {
            replication_group_id: id.clone(),
            description,
            global_replication_group_id: None,
            global_replication_group_role: None,
            status: "available".to_string(),
            cache_node_type,
            engine,
            engine_version,
            num_cache_clusters,
            automatic_failover_enabled,
            endpoint_address: endpoint_address.clone(),
            endpoint_port: port,
            arn: arn.clone(),
            created_at: Utc::now().to_rfc3339(),
            container_id: String::new(),
            host_port: 0,
            member_clusters: Vec::new(),
            snapshot_retention_limit,
            snapshot_window,
            transit_encryption_enabled,
            at_rest_encryption_enabled,
            cluster_enabled,
            kms_key_id,
            auth_token_enabled,
            user_group_ids,
            multi_az_enabled,
            log_delivery_configurations: Vec::new(),
            data_tiering: props
                .get("DataTieringEnabled")
                .and_then(|v| v.as_bool())
                .map(|b| if b { "enabled" } else { "disabled" }.to_string()),
            ip_discovery: props
                .get("IpDiscovery")
                .and_then(|v| v.as_str())
                .map(String::from),
            network_type: props
                .get("NetworkType")
                .and_then(|v| v.as_str())
                .map(String::from),
            transit_encryption_mode: props
                .get("TransitEncryptionMode")
                .and_then(|v| v.as_str())
                .map(String::from),
            num_node_groups,
            configuration_endpoint_address: configuration_endpoint.clone(),
            configuration_endpoint_port: configuration_endpoint.as_ref().map(|_| port),
            replicas_per_node_group,
            auth_token: props
                .get("AuthToken")
                .and_then(|v| v.as_str())
                .filter(|s| !s.is_empty())
                .map(String::from),
            port,
            notification_topic_arn: props
                .get("NotificationTopicArn")
                .and_then(|v| v.as_str())
                .map(String::from),
            cluster_mode: props
                .get("ClusterMode")
                .and_then(|v| v.as_str())
                .map(String::from),
            data_tiering_enabled: props.get("DataTieringEnabled").and_then(|v| v.as_bool()),
            notification_topic_status: None,
            cache_parameter_group_name: props
                .get("CacheParameterGroupName")
                .and_then(|v| v.as_str())
                .map(String::from),
            cache_subnet_group_name: props
                .get("CacheSubnetGroupName")
                .and_then(|v| v.as_str())
                .map(String::from),
            security_group_ids: props
                .get("SecurityGroupIds")
                .and_then(|v| v.as_array())
                .map(|arr| {
                    arr.iter()
                        .filter_map(|v| v.as_str().map(String::from))
                        .collect()
                })
                .unwrap_or_default(),
            preferred_maintenance_window: props
                .get("PreferredMaintenanceWindow")
                .and_then(|v| v.as_str())
                .map(String::from),
            snapshot_name: props
                .get("SnapshotName")
                .and_then(|v| v.as_str())
                .map(String::from),
            snapshot_arns: props
                .get("SnapshotArns")
                .and_then(|v| v.as_array())
                .map(|arr| {
                    arr.iter()
                        .filter_map(|v| v.as_str().map(String::from))
                        .collect()
                })
                .unwrap_or_default(),
            auto_minor_version_upgrade: props
                .get("AutoMinorVersionUpgrade")
                .and_then(|v| v.as_bool())
                .unwrap_or(true),
        };
        state.replication_groups.insert(id.clone(), group);

        let mut result = ProvisionResult::new(id.clone())
            .with("Arn", arn)
            .with("PrimaryEndPoint.Address", endpoint_address.clone())
            .with("PrimaryEndPoint.Port", port.to_string())
            .with("ReadEndPoint.Addresses", endpoint_address.clone())
            .with("ReadEndPoint.Ports", port.to_string());
        if let Some(cfg) = configuration_endpoint {
            result = result
                .with("ConfigurationEndPoint.Address", cfg)
                .with("ConfigurationEndPoint.Port", port.to_string());
        }
        Ok(result)
    }

    fn delete_ec_replication_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.elasticache_state.write();
        let state = accounts.get_or_create(&self.account_id);
        state.replication_groups.remove(physical_id);
        Ok(())
    }

    // --- CloudFront ---
    //
    // CloudFront is a global service that stores data under the default
    // account bucket; mirror that here so SDK reads land on the same data
    // CFN wrote.

    fn create_cf_origin_access_identity(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("CloudFrontOriginAccessIdentityConfig")
            .ok_or("CloudFrontOriginAccessIdentityConfig is required")?;
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let caller_reference = format!("cfn-{}", resource.logical_id);

        let id = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..13].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );
        let s3_canonical_user_id = format!(
            "{:0<64}",
            Uuid::new_v4().simple().to_string().to_lowercase()
        );

        let oai = StoredOriginAccessIdentity {
            id: id.clone(),
            etag,
            s3_canonical_user_id: s3_canonical_user_id.clone(),
            config: CloudFrontOriginAccessIdentityConfig {
                caller_reference,
                comment,
            },
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_access_identities.insert(id.clone(), oai);

        Ok(ProvisionResult::new(id.clone())
            .with("Id", id)
            .with("S3CanonicalUserId", s3_canonical_user_id))
    }

    fn delete_cf_origin_access_identity(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_access_identities.remove(physical_id);
        Ok(())
    }

    /// Provision an `AWS::CloudFront::Distribution`. Reads
    /// DistributionConfig.Origins/DefaultCacheBehavior/etc. and persists
    /// a StoredDistribution in CloudFront state. CFN's Origins property
    /// is a flat array, so we wrap it back into the wire shape with a
    /// quantity + Items.Origin nesting.
    fn create_cf_distribution(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let cfg = resource
            .properties
            .get("DistributionConfig")
            .ok_or_else(|| "DistributionConfig is required".to_string())?;

        // CFN Origins is a flat JSON array; the wire shape is
        // { Quantity, Items: { Origin: [...] } }. Translate. CFN's
        // PascalCase doesn't always match the wire model — Origin's
        // CustomOriginConfig uses HTTPPort/HTTPSPort while the model
        // expects HttpPort/HttpsPort, so we patch a few well-known
        // renames before letting serde finish the parse.
        let origin_entries: Vec<Origin> = cfg
            .get("Origins")
            .and_then(|v| v.as_array())
            .ok_or_else(|| "DistributionConfig.Origins is required".to_string())?
            .iter()
            .map(|o| {
                let mut patched = o.clone();
                if let Some(custom) = patched
                    .get_mut("CustomOriginConfig")
                    .and_then(|v| v.as_object_mut())
                {
                    if let Some(v) = custom.remove("HTTPPort") {
                        custom.insert("HttpPort".to_string(), v);
                    }
                    if let Some(v) = custom.remove("HTTPSPort") {
                        custom.insert("HttpsPort".to_string(), v);
                    }
                }
                serde_json::from_value::<Origin>(patched)
                    .map_err(|e| format!("Invalid Origin entry: {e}"))
            })
            .collect::<Result<Vec<_>, _>>()?;
        if origin_entries.is_empty() {
            return Err("DistributionConfig.Origins must contain at least one origin".to_string());
        }
        let origins = Origins {
            quantity: origin_entries.len() as i32,
            items: Some(OriginItems {
                origin: origin_entries,
            }),
        };

        let dcb_value = cfg
            .get("DefaultCacheBehavior")
            .ok_or_else(|| "DistributionConfig.DefaultCacheBehavior is required".to_string())?;
        let default_cache_behavior: DefaultCacheBehavior =
            serde_json::from_value(dcb_value.clone())
                .map_err(|e| format!("Invalid DefaultCacheBehavior: {e}"))?;

        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let enabled = cfg.get("Enabled").and_then(|v| v.as_bool()).unwrap_or(true);
        let price_class = cfg
            .get("PriceClass")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let http_version = cfg
            .get("HttpVersion")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let is_ipv6_enabled = cfg.get("IPV6Enabled").and_then(|v| v.as_bool());
        let default_root_object = cfg
            .get("DefaultRootObject")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());
        let web_acl_id = cfg
            .get("WebACLId")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string());

        let viewer_certificate: Option<ViewerCertificate> = cfg
            .get("ViewerCertificate")
            .map(|v| serde_json::from_value(v.clone()))
            .transpose()
            .map_err(|e| format!("Invalid ViewerCertificate: {e}"))?;

        let caller_reference = format!("cfn-{}-{}", resource.logical_id, Uuid::new_v4().simple());

        let mut config = DistributionConfig {
            caller_reference,
            comment,
            enabled,
            origins,
            default_cache_behavior,
            ..Default::default()
        };
        config.price_class = price_class;
        config.http_version = http_version;
        config.is_ipv6_enabled = is_ipv6_enabled;
        config.default_root_object = default_root_object;
        config.web_acl_id = web_acl_id;
        config.viewer_certificate = viewer_certificate;

        // Mint distribution id + ARN + domain in the same shape the
        // CloudFront service uses.
        let id_suffix: String = Uuid::new_v4()
            .simple()
            .to_string()
            .chars()
            .take(13)
            .collect::<String>()
            .to_uppercase();
        let id = format!("E{id_suffix}");
        let etag_suffix: String = Uuid::new_v4()
            .simple()
            .to_string()
            .chars()
            .take(7)
            .collect::<String>()
            .to_uppercase();
        let etag = format!("E{etag_suffix}");
        let domain_name = format!("{}.cloudfront.net", id.to_lowercase());
        let arn = format!(
            "arn:aws:cloudfront::{}:distribution/{}",
            self.account_id, id
        );

        let stored = StoredDistribution {
            id: id.clone(),
            arn: arn.clone(),
            // CloudFront flips this to Deployed on the first GetDistribution
            // poll, matching the rest of the service.
            status: "InProgress".to_string(),
            last_modified_time: Utc::now(),
            domain_name: domain_name.clone(),
            in_progress_invalidation_batches: 0,
            etag,
            config,
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.distributions.insert(id.clone(), stored);
        Ok(ProvisionResult::new(id.clone())
            .with("Id", id)
            .with("DomainName", domain_name)
            .with("Arn", arn))
    }

    fn delete_cf_distribution(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.distributions.remove(physical_id);
        Ok(())
    }

    fn create_cf_origin_access_control(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("OriginAccessControlConfig")
            .ok_or("OriginAccessControlConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("OriginAccessControlConfig.Name is required")?
            .to_string();
        let signing_protocol = cfg
            .get("SigningProtocol")
            .and_then(|v| v.as_str())
            .unwrap_or("sigv4")
            .to_string();
        let signing_behavior = cfg
            .get("SigningBehavior")
            .and_then(|v| v.as_str())
            .unwrap_or("always")
            .to_string();
        let origin_type = cfg
            .get("OriginAccessControlOriginType")
            .and_then(|v| v.as_str())
            .ok_or("OriginAccessControlConfig.OriginAccessControlOriginType is required")?
            .to_string();
        let description = cfg
            .get("Description")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..13].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );
        let oac = StoredOriginAccessControl {
            id: id.clone(),
            etag,
            config: OriginAccessControlConfig {
                name,
                description,
                signing_protocol,
                signing_behavior,
                origin_access_control_origin_type: origin_type,
            },
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_access_controls.insert(id.clone(), oac);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_origin_access_control(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_access_controls.remove(physical_id);
        Ok(())
    }

    fn create_cf_public_key(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("PublicKeyConfig")
            .ok_or("PublicKeyConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("PublicKeyConfig.Name is required")?
            .to_string();
        let encoded_key = cfg
            .get("EncodedKey")
            .and_then(|v| v.as_str())
            .ok_or("PublicKeyConfig.EncodedKey is required")?
            .to_string();
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);
        let caller_reference = cfg
            .get("CallerReference")
            .and_then(|v| v.as_str())
            .unwrap_or("")
            .to_string();
        let caller_reference = if caller_reference.is_empty() {
            format!("cfn-{}", resource.logical_id)
        } else {
            caller_reference
        };

        let id = format!(
            "K{}",
            Uuid::new_v4().simple().to_string()[..13].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );

        let pk = StoredPublicKey {
            id: id.clone(),
            etag,
            created_time: Utc::now(),
            config: PublicKeyConfig {
                caller_reference,
                name,
                encoded_key,
                comment,
            },
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.public_keys.insert(id.clone(), pk);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_public_key(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.public_keys.remove(physical_id);
        Ok(())
    }

    fn create_cf_key_group(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("KeyGroupConfig")
            .ok_or("KeyGroupConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("KeyGroupConfig.Name is required")?
            .to_string();
        let items: Vec<String> = cfg
            .get("Items")
            .and_then(|v| v.as_array())
            .map(|arr| {
                arr.iter()
                    .filter_map(|v| v.as_str().map(String::from))
                    .collect()
            })
            .unwrap_or_default();
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "KG{}",
            Uuid::new_v4().simple().to_string()[..12].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );

        let kg = StoredKeyGroup {
            id: id.clone(),
            etag,
            last_modified_time: Utc::now(),
            config: KeyGroupConfig {
                name,
                items: KeyGroupItems { public_key: items },
                comment,
            },
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.key_groups.insert(id.clone(), kg);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_key_group(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.key_groups.remove(physical_id);
        Ok(())
    }

    fn create_cf_function(&self, resource: &ResourceDefinition) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let name = props
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("Name is required")?
            .to_string();
        let function_code = props
            .get("FunctionCode")
            .and_then(|v| v.as_str())
            .ok_or("FunctionCode is required")?
            .to_string();
        let cfg = props
            .get("FunctionConfig")
            .ok_or("FunctionConfig is required")?;
        let runtime = cfg
            .get("Runtime")
            .and_then(|v| v.as_str())
            .unwrap_or("cloudfront-js-2.0")
            .to_string();
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "FN{}",
            Uuid::new_v4().simple().to_string()[..12].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );
        let function_arn =
            Arn::global("cloudfront", &self.account_id, &format!("function/{name}")).to_string();

        let now = Utc::now();
        let func = StoredFunction {
            name: name.clone(),
            etag,
            status: "UNPUBLISHED".to_string(),
            stage: "DEVELOPMENT".to_string(),
            function_arn: function_arn.clone(),
            created_time: now,
            last_modified_time: now,
            config: FunctionConfig {
                comment,
                runtime,
                key_value_store_associations: None,
            },
            function_code,
            live_function_code: None,
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        // Use the function's ARN/name as the registry key so subsequent
        // operations (Get/Update/Delete) keyed by name resolve.
        state.functions.insert(name.clone(), func);

        Ok(ProvisionResult::new(name.clone())
            .with("FunctionARN", function_arn)
            .with("FunctionMetadata.FunctionARN", id)
            .with("Stage", "DEVELOPMENT"))
    }

    fn delete_cf_function(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.functions.remove(physical_id);
        Ok(())
    }

    fn create_cf_cache_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("CachePolicyConfig")
            .ok_or("CachePolicyConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("CachePolicyConfig.Name is required")?
            .to_string();
        let min_ttl = cfg
            .get("MinTTL")
            .and_then(|v| {
                v.as_i64()
                    .or_else(|| v.as_str().and_then(|s| s.parse::<i64>().ok()))
            })
            .unwrap_or(0);
        let default_ttl = cfg.get("DefaultTTL").and_then(|v| {
            v.as_i64()
                .or_else(|| v.as_str().and_then(|s| s.parse::<i64>().ok()))
        });
        let max_ttl = cfg.get("MaxTTL").and_then(|v| {
            v.as_i64()
                .or_else(|| v.as_str().and_then(|s| s.parse::<i64>().ok()))
        });
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "CP{}",
            Uuid::new_v4().simple().to_string()[..12].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );

        let cache_policy = StoredCachePolicy {
            id: id.clone(),
            etag,
            last_modified_time: Utc::now(),
            config: CachePolicyConfig {
                comment,
                name,
                default_ttl,
                max_ttl,
                min_ttl,
                parameters_in_cache_key_and_forwarded_to_origin: None,
            },
            policy_type: "custom".to_string(),
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.cache_policies.insert(id.clone(), cache_policy);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_cache_policy(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.cache_policies.remove(physical_id);
        Ok(())
    }

    fn create_cf_origin_request_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("OriginRequestPolicyConfig")
            .ok_or("OriginRequestPolicyConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("OriginRequestPolicyConfig.Name is required")?
            .to_string();
        let header_behavior = cfg
            .get("HeadersConfig")
            .and_then(|v| v.get("HeaderBehavior"))
            .and_then(|v| v.as_str())
            .unwrap_or("none")
            .to_string();
        let cookie_behavior = cfg
            .get("CookiesConfig")
            .and_then(|v| v.get("CookieBehavior"))
            .and_then(|v| v.as_str())
            .unwrap_or("none")
            .to_string();
        let query_string_behavior = cfg
            .get("QueryStringsConfig")
            .and_then(|v| v.get("QueryStringBehavior"))
            .and_then(|v| v.as_str())
            .unwrap_or("none")
            .to_string();
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "ORP{}",
            Uuid::new_v4().simple().to_string()[..11].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );

        let policy = StoredOriginRequestPolicy {
            id: id.clone(),
            etag,
            last_modified_time: Utc::now(),
            config: OriginRequestPolicyConfig {
                comment,
                name,
                headers_config: OriginRequestPolicyHeadersConfig {
                    header_behavior,
                    headers: None,
                },
                cookies_config: OriginRequestPolicyCookiesConfig {
                    cookie_behavior,
                    cookies: None,
                },
                query_strings_config: OriginRequestPolicyQueryStringsConfig {
                    query_string_behavior,
                    query_strings: None,
                },
            },
            policy_type: "custom".to_string(),
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_request_policies.insert(id.clone(), policy);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_origin_request_policy(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.origin_request_policies.remove(physical_id);
        Ok(())
    }

    fn create_cf_response_headers_policy(
        &self,
        resource: &ResourceDefinition,
    ) -> Result<ProvisionResult, String> {
        let props = &resource.properties;
        let cfg = props
            .get("ResponseHeadersPolicyConfig")
            .ok_or("ResponseHeadersPolicyConfig is required")?;
        let name = cfg
            .get("Name")
            .and_then(|v| v.as_str())
            .ok_or("ResponseHeadersPolicyConfig.Name is required")?
            .to_string();
        let comment = cfg
            .get("Comment")
            .and_then(|v| v.as_str())
            .map(String::from);

        let id = format!(
            "RHP{}",
            Uuid::new_v4().simple().to_string()[..11].to_uppercase()
        );
        let etag = format!(
            "E{}",
            Uuid::new_v4().simple().to_string()[..7].to_uppercase()
        );

        let policy = StoredResponseHeadersPolicy {
            id: id.clone(),
            etag,
            last_modified_time: Utc::now(),
            config: ResponseHeadersPolicyConfig {
                comment,
                name,
                cors_config: None,
                security_headers_config: None,
                server_timing_headers_config: None,
                custom_headers_config: None,
                remove_headers_config: None,
            },
            policy_type: "custom".to_string(),
        };

        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.response_headers_policies.insert(id.clone(), policy);

        Ok(ProvisionResult::new(id.clone()).with("Id", id))
    }

    fn delete_cf_response_headers_policy(&self, physical_id: &str) -> Result<(), String> {
        let mut accounts = self.cloudfront_state.write();
        let state = accounts.entry("000000000000");
        state.response_headers_policies.remove(physical_id);
        Ok(())
    }

    fn parse_athena_tags(value: Option<&serde_json::Value>) -> BTreeMap<String, String> {
        let mut out = BTreeMap::new();
        let Some(arr) = value.and_then(|v| v.as_array()) else {
            return out;
        };
        for tag in arr {
            if let (Some(k), Some(v)) = (
                tag.get("Key").and_then(|v| v.as_str()),
                tag.get("Value").and_then(|v| v.as_str()),
            ) {
                out.insert(k.to_string(), v.to_string());
            }
        }
        out
    }

    fn fetch_template_from_url(&self, url: &str) -> Result<String, String> {
        if let Some(rest) = url.strip_prefix("s3://") {
            let parts: Vec<&str> = rest.splitn(2, '/').collect();
            if parts.len() != 2 {
                return Err("Invalid s3:// URL".to_string());
            }
            return self.fetch_s3_template(parts[0], parts[1]);
        }

        if let Some(rest) = url.strip_prefix("https://s3.amazonaws.com/") {
            let parts: Vec<&str> = rest.splitn(2, '/').collect();
            if parts.len() != 2 {
                return Err("Invalid S3 HTTPS URL".to_string());
            }
            return self.fetch_s3_template(parts[0], parts[1]);
        }

        if let Some(host_rest) = url.strip_prefix("https://") {
            if let Some(slash_pos) = host_rest.find('/') {
                let host = &host_rest[..slash_pos];
                let key = &host_rest[slash_pos + 1..];
                if let Some(bucket) = host.strip_suffix(".s3.amazonaws.com") {
                    return self.fetch_s3_template(bucket, key);
                }
                if host.contains(".s3.") && host.ends_with(".amazonaws.com") {
                    let bucket = host.split(".s3.").next().unwrap_or("");
                    if !bucket.is_empty() {
                        return self.fetch_s3_template(bucket, key);
                    }
                }
            }
        }

        Err(format!("Unsupported TemplateURL: {url}"))
    }

    fn fetch_s3_template(&self, bucket: &str, key: &str) -> Result<String, String> {
        let mut s3_accounts = self.s3_state.write();
        let s3_state = s3_accounts.get_or_create(&self.account_id);
        let bucket_obj = s3_state
            .buckets
            .get(bucket)
            .ok_or_else(|| format!("S3 bucket not found: {bucket}"))?;
        let obj = bucket_obj
            .objects
            .get(key)
            .ok_or_else(|| format!("S3 object not found: {bucket}/{key}"))?;
        let bytes = s3_state
            .read_body(&obj.body)
            .map_err(|e| format!("Failed to read S3 object body: {e}"))?;
        String::from_utf8(bytes.to_vec()).map_err(|e| format!("S3 object is not valid UTF-8: {e}"))
    }
}

/// Implements the CloudFormation `GenerateSecretString` shape on
/// `AWS::SecretsManager::Secret`. Produces the plaintext payload that
/// will become the AWSCURRENT version of the secret.
///
/// When `SecretStringTemplate` is set together with `GenerateStringKey`,
/// the generated password is inserted under `GenerateStringKey` in the
/// JSON template (this is the standard "DB credential" pattern).
/// Without those two, the bare generated password is returned.
fn generate_secret_string_payload(gen: &serde_json::Value) -> Result<String, String> {
    let length = gen
        .get("PasswordLength")
        .and_then(|v| v.as_i64())
        .unwrap_or(32) as usize;
    let exclude_lowercase = gen
        .get("ExcludeLowercase")
        .and_then(|v| v.as_bool())
        .unwrap_or(false);
    let exclude_uppercase = gen
        .get("ExcludeUppercase")
        .and_then(|v| v.as_bool())
        .unwrap_or(false);
    let exclude_numbers = gen
        .get("ExcludeNumbers")
        .and_then(|v| v.as_bool())
        .unwrap_or(false);
    let exclude_punctuation = gen
        .get("ExcludePunctuation")
        .and_then(|v| v.as_bool())
        .unwrap_or(false);
    let include_space = gen
        .get("IncludeSpace")
        .and_then(|v| v.as_bool())
        .unwrap_or(false);
    let exclude_chars = gen
        .get("ExcludeCharacters")
        .and_then(|v| v.as_str())
        .unwrap_or("")
        .to_string();

    let lowercase = "abcdefghijklmnopqrstuvwxyz";
    let uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    let digits = "0123456789";
    let punctuation = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";

    let mut pool = String::new();
    if !exclude_lowercase {
        pool.extend(lowercase.chars().filter(|c| !exclude_chars.contains(*c)));
    }
    if !exclude_uppercase {
        pool.extend(uppercase.chars().filter(|c| !exclude_chars.contains(*c)));
    }
    if !exclude_numbers {
        pool.extend(digits.chars().filter(|c| !exclude_chars.contains(*c)));
    }
    if !exclude_punctuation {
        pool.extend(punctuation.chars().filter(|c| !exclude_chars.contains(*c)));
    }
    if include_space && !exclude_chars.contains(' ') {
        pool.push(' ');
    }
    if pool.is_empty() {
        return Err("GenerateSecretString character pool is empty".to_string());
    }

    let pool_chars: Vec<char> = pool.chars().collect();
    let mut password = String::with_capacity(length);
    let mut counter: u64 = std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .map(|d| d.as_nanos() as u64)
        .unwrap_or(0);
    while password.len() < length {
        // Splitmix64 — deterministic, no_std-friendly, good enough for
        // fake-cloud password generation. Real entropy isn't a goal here.
        counter = counter.wrapping_add(0x9E3779B97F4A7C15);
        let mut z = counter;
        z = (z ^ (z >> 30)).wrapping_mul(0xBF58476D1CE4E5B9);
        z = (z ^ (z >> 27)).wrapping_mul(0x94D049BB133111EB);
        z ^= z >> 31;
        let idx = (z as usize) % pool_chars.len();
        password.push(pool_chars[idx]);
    }

    let template = gen.get("SecretStringTemplate").and_then(|v| v.as_str());
    let key = gen.get("GenerateStringKey").and_then(|v| v.as_str());
    match (template, key) {
        (Some(tmpl), Some(k)) => {
            let mut value: serde_json::Value = serde_json::from_str(tmpl)
                .map_err(|e| format!("SecretStringTemplate is not valid JSON: {e}"))?;
            if let Some(obj) = value.as_object_mut() {
                obj.insert(k.to_string(), serde_json::Value::String(password));
                Ok(value.to_string())
            } else {
                Err("SecretStringTemplate must be a JSON object".to_string())
            }
        }
        _ => Ok(password),
    }
}

fn parse_ses_receipt_action(value: &serde_json::Value) -> Option<SesReceiptAction> {
    let obj = value.as_object()?;
    if let Some(s3) = obj.get("S3Action").and_then(|v| v.as_object()) {
        let bucket_name = s3.get("BucketName").and_then(|v| v.as_str())?.to_string();
        return Some(SesReceiptAction::S3 {
            bucket_name,
            object_key_prefix: s3
                .get("ObjectKeyPrefix")
                .and_then(|v| v.as_str())
                .map(String::from),
            topic_arn: s3
                .get("TopicArn")
                .and_then(|v| v.as_str())
                .map(String::from),
            kms_key_arn: s3
                .get("KmsKeyArn")
                .and_then(|v| v.as_str())
                .map(String::from),
        });
    }
    if let Some(sns) = obj.get("SNSAction").and_then(|v| v.as_object()) {
        return Some(SesReceiptAction::Sns {
            topic_arn: sns.get("TopicArn").and_then(|v| v.as_str())?.to_string(),
            encoding: sns
                .get("Encoding")
                .and_then(|v| v.as_str())
                .map(String::from),
        });
    }
    if let Some(la) = obj.get("LambdaAction").and_then(|v| v.as_object()) {
        return Some(SesReceiptAction::Lambda {
            function_arn: la.get("FunctionArn").and_then(|v| v.as_str())?.to_string(),
            invocation_type: la
                .get("InvocationType")
                .and_then(|v| v.as_str())
                .map(String::from),
            topic_arn: la
                .get("TopicArn")
                .and_then(|v| v.as_str())
                .map(String::from),
        });
    }
    if let Some(b) = obj.get("BounceAction").and_then(|v| v.as_object()) {
        return Some(SesReceiptAction::Bounce {
            smtp_reply_code: b
                .get("SmtpReplyCode")
                .and_then(|v| v.as_str())
                .unwrap_or("550")
                .to_string(),
            message: b
                .get("Message")
                .and_then(|v| v.as_str())
                .unwrap_or("")
                .to_string(),
            sender: b
                .get("Sender")
                .and_then(|v| v.as_str())
                .unwrap_or("")
                .to_string(),
            status_code: b
                .get("StatusCode")
                .and_then(|v| v.as_str())
                .map(String::from),
            topic_arn: b.get("TopicArn").and_then(|v| v.as_str()).map(String::from),
        });
    }
    if let Some(ah) = obj.get("AddHeaderAction").and_then(|v| v.as_object()) {
        return Some(SesReceiptAction::AddHeader {
            header_name: ah.get("HeaderName").and_then(|v| v.as_str())?.to_string(),
            header_value: ah.get("HeaderValue").and_then(|v| v.as_str())?.to_string(),
        });
    }
    if let Some(s) = obj.get("StopAction").and_then(|v| v.as_object()) {
        return Some(SesReceiptAction::Stop {
            scope: s
                .get("Scope")
                .and_then(|v| v.as_str())
                .unwrap_or("RuleSet")
                .to_string(),
            topic_arn: s.get("TopicArn").and_then(|v| v.as_str()).map(String::from),
        });
    }
    None
}

/// Generate an N-character alphanumeric id for API Gateway v2 resources.
/// AWS HTTP API ids are 10 chars; routes/integrations/etc are similarly
/// short. This mirrors the runtime crate's id shape.
fn make_apigwv2_id(n: usize) -> String {
    let s = uuid::Uuid::new_v4().simple().to_string();
    s[..n.min(s.len())].to_string()
}

/// Lowercase the first letter of each key in a JSON object, recursively.
/// CloudFormation property names are PascalCase (`BurstLimit`,
/// `RateLimit`); the runtime API Gateway service stores values keyed in
/// camelCase (`burstLimit`, `rateLimit`). Used at the CFN/service
/// boundary so JSON pulled from the template can flow into the runtime
/// state without renaming each leaf by hand.
/// Coerce a CFN-resolved Number/String parameter into i64. CFN
/// parameters surface here as `Value::String` after `Ref` substitution,
/// even when the parameter `Type` is `Number`, so we need both paths.
fn cfn_as_i64(v: &serde_json::Value) -> Option<i64> {
    if let Some(n) = v.as_i64() {
        return Some(n);
    }
    v.as_str().and_then(|s| s.parse::<i64>().ok())
}

fn lowercase_first_keys(value: serde_json::Value) -> serde_json::Value {
    match value {
        serde_json::Value::Object(map) => {
            let mut out = serde_json::Map::new();
            for (k, v) in map {
                let new_key = if let Some(first) = k.chars().next() {
                    let mut s = String::with_capacity(k.len());
                    s.extend(first.to_lowercase());
                    s.push_str(&k[first.len_utf8()..]);
                    s
                } else {
                    k
                };
                out.insert(new_key, lowercase_first_keys(v));
            }
            serde_json::Value::Object(out)
        }
        serde_json::Value::Array(arr) => {
            serde_json::Value::Array(arr.into_iter().map(lowercase_first_keys).collect())
        }
        other => other,
    }
}

/// Synthesize the per-domain DNS validation record list for a
/// CFN-provisioned cert. Mirrors the runtime ACM path: each name gets
/// a SUCCESS record (since CFN-issued certs are auto-validated above)
/// and an `_amzn-validations.<domain>.` resource record so callers
/// that read DescribeCertificate see the same shape they'd expect
/// from a real ACM-issued cert.
fn synth_acm_domain_validation(
    domain_name: &str,
    sans: &[String],
    validation_method: &str,
) -> Vec<AcmDomainValidation> {
    let mut all = vec![domain_name.to_string()];
    for s in sans {
        if !all.contains(s) {
            all.push(s.clone());
        }
    }
    all.into_iter()
        .map(|name| AcmDomainValidation {
            domain_name: name.clone(),
            validation_status: "SUCCESS".to_string(),
            validation_method: validation_method.to_string(),
            resource_record_name: Some(format!("_amzn-validations.{name}.")),
            resource_record_type: Some("CNAME".to_string()),
            resource_record_value: Some(format!("{}.acm-validations.aws.", Uuid::new_v4())),
        })
        .collect()
}

/// Convert CFN `Tags` array into the ACM crate's tag map form.
fn parse_acm_tags(value: Option<&serde_json::Value>) -> BTreeMap<String, String> {
    let mut out = BTreeMap::new();
    if let Some(arr) = value.and_then(|v| v.as_array()) {
        for t in arr {
            if let (Some(k), Some(v)) = (
                t.get("Key").and_then(|v| v.as_str()),
                t.get("Value").and_then(|v| v.as_str()),
            ) {
                out.insert(k.to_string(), v.to_string());
            }
        }
    }
    out
}

/// Convert CFN `Tags` array into the ECS `TagEntry` form.
fn parse_ecs_tags(value: Option<&serde_json::Value>) -> Vec<EcsTagEntry> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .filter_map(|t| {
            let key = t.get("Key").and_then(|v| v.as_str())?.to_string();
            let value = t.get("Value").and_then(|v| v.as_str())?.to_string();
            Some(EcsTagEntry { key, value })
        })
        .collect()
}

/// Strip the cluster ARN prefix when CFN passes a Ref-resolved name or
/// a GetAtt-resolved ARN; ECS internal state keys clusters by name.
fn parse_ecs_cluster_name(input: &str) -> String {
    if let Some(after) = input.split(":cluster/").nth(1) {
        return after.to_string();
    }
    input.to_string()
}

/// Pull `(family, revision)` out of a task definition ARN tail like
/// `task-definition/web:3`. Returns `(family, revision)` or
/// `(input, 1)` for unrecognised shapes.
fn parse_td_arn(input: &str) -> (String, i32) {
    let suffix = input.rsplit('/').next().unwrap_or(input);
    if let Some((family, rev)) = suffix.split_once(':') {
        if let Ok(revision) = rev.parse::<i32>() {
            return (family.to_string(), revision);
        }
    }
    (input.to_string(), 1)
}

/// Pull `(cluster, service)` out of a service ARN like
/// `arn:aws:ecs:us-east-1:000000000000:service/<cluster>/<service>`.
fn parse_service_arn(input: &str) -> Option<(String, String)> {
    let after = input.split(":service/").nth(1)?;
    let mut parts = after.splitn(2, '/');
    let cluster = parts.next()?.to_string();
    let service = parts.next()?.to_string();
    Some((cluster, service))
}

/// Parse CFN-shape Tags array into the RDS crate's tag form.
fn parse_rds_tags(value: Option<&serde_json::Value>) -> Vec<RdsTag> {
    let Some(arr) = value.and_then(|v| v.as_array()) else {
        return Vec::new();
    };
    arr.iter()
        .filter_map(|t| {
            let key = t.get("Key").and_then(|v| v.as_str())?.to_string();
            let value = t.get("Value").and_then(|v| v.as_str())?.to_string();
            Some(RdsTag { key, value })
        })
        .collect()
}

/// Lazy-create an entry in the RDS `extras` bucket so the provisioner
/// doesn't have to re-implement the `BTreeMap::entry` boilerplate per
/// resource type.
fn rds_extras_mut<'a>(
    state: &'a mut fakecloud_rds::RdsState,
    category: &str,
) -> &'a mut BTreeMap<String, serde_json::Value> {
    state.extras.entry(category.to_string()).or_default()
}

/// Parse a JSON array-of-strings property. Returns empty Vec when the
/// value is missing or shaped wrong; matches the tolerant input handling
/// used by the runtime Cognito service.
fn parse_cognito_string_array(value: Option<&serde_json::Value>) -> Vec<String> {
    value
        .and_then(|v| v.as_array())
        .map(|arr| {
            arr.iter()
                .filter_map(|v| v.as_str().map(|s| s.to_string()))
                .collect()
        })
        .unwrap_or_default()
}

fn parse_cognito_password_policy(value: Option<&serde_json::Value>) -> PasswordPolicy {
    let Some(inner) = value
        .and_then(|v| v.get("PasswordPolicy"))
        .and_then(|v| v.as_object())
    else {
        return PasswordPolicy::default();
    };
    let mut p = PasswordPolicy::default();
    if let Some(n) = inner.get("MinimumLength").and_then(|v| v.as_i64()) {
        p.minimum_length = n;
    }
    if let Some(b) = inner.get("RequireUppercase").and_then(|v| v.as_bool()) {
        p.require_uppercase = b;
    }
    if let Some(b) = inner.get("RequireLowercase").and_then(|v| v.as_bool()) {
        p.require_lowercase = b;
    }
    if let Some(b) = inner.get("RequireNumbers").and_then(|v| v.as_bool()) {
        p.require_numbers = b;
    }
    if let Some(b) = inner.get("RequireSymbols").and_then(|v| v.as_bool()) {
        p.require_symbols = b;
    }
    if let Some(n) = inner
        .get("TemporaryPasswordValidityDays")
        .and_then(|v| v.as_i64())
    {
        p.temporary_password_validity_days = n;
    }
    p
}

fn parse_cognito_schema_attribute(value: &serde_json::Value) -> Option<SchemaAttribute> {
    let name = value.get("Name").and_then(|v| v.as_str())?.to_string();
    Some(SchemaAttribute {
        name,
        attribute_data_type: value
            .get("AttributeDataType")
            .and_then(|v| v.as_str())
            .unwrap_or("String")
            .to_string(),
        developer_only_attribute: value
            .get("DeveloperOnlyAttribute")
            .and_then(|v| v.as_bool())
            .unwrap_or(false),
        mutable: value
            .get("Mutable")
            .and_then(|v| v.as_bool())
            .unwrap_or(true),
        required: value
            .get("Required")
            .and_then(|v| v.as_bool())
            .unwrap_or(false),
        string_attribute_constraints: None,
        number_attribute_constraints: None,
    })
}

fn parse_cognito_tags(value: Option<&serde_json::Value>) -> BTreeMap<String, String> {
    let mut out = BTreeMap::new();
    if let Some(obj) = value.and_then(|v| v.as_object()) {
        for (k, v) in obj {
            if let Some(s) = v.as_str() {
                out.insert(k.clone(), s.to_string());
            }
        }
    }
    out
}

fn parse_cognito_email_configuration(
    value: Option<&serde_json::Value>,
) -> Option<EmailConfiguration> {
    let inner = value?.as_object()?;
    Some(EmailConfiguration {
        source_arn: inner
            .get("SourceArn")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        reply_to_email_address: inner
            .get("ReplyToEmailAddress")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        email_sending_account: inner
            .get("EmailSendingAccount")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        from_email_address: inner
            .get("From")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        configuration_set: inner
            .get("ConfigurationSet")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
    })
}

fn parse_cognito_sms_configuration(value: Option<&serde_json::Value>) -> Option<SmsConfiguration> {
    let inner = value?.as_object()?;
    Some(SmsConfiguration {
        sns_caller_arn: inner
            .get("SnsCallerArn")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        external_id: inner
            .get("ExternalId")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
        sns_region: inner
            .get("SnsRegion")
            .and_then(|v| v.as_str())
            .map(|s| s.to_string()),
    })
}

fn parse_cognito_admin_create_user_config(
    value: Option<&serde_json::Value>,
) -> Option<AdminCreateUserConfig> {
    let inner = value?.as_object()?;
    Some(AdminCreateUserConfig {
        allow_admin_create_user_only: inner
            .get("AllowAdminCreateUserOnly")
            .and_then(|v| v.as_bool()),
        invite_message_template: None,
        unused_account_validity_days: inner
            .get("UnusedAccountValidityDays")
            .and_then(|v| v.as_i64()),
    })
}

fn parse_cognito_account_recovery(
    value: Option<&serde_json::Value>,
) -> Option<AccountRecoverySetting> {
    let arr = value?.get("RecoveryMechanisms")?.as_array()?;
    Some(AccountRecoverySetting {
        recovery_mechanisms: arr
            .iter()
            .filter_map(|m| {
                let name = m.get("Name").and_then(|v| v.as_str())?.to_string();
                let priority = m.get("Priority").and_then(|v| v.as_i64()).unwrap_or(1);
                Some(RecoveryOption { name, priority })
            })
            .collect(),
    })
}

fn parse_firehose_s3_destination(value: &serde_json::Value) -> Result<S3Destination, String> {
    let role_arn = value
        .get("RoleARN")
        .and_then(|v| v.as_str())
        .ok_or("S3 destination requires RoleARN")?
        .to_string();
    let bucket_arn = value
        .get("BucketARN")
        .and_then(|v| v.as_str())
        .ok_or("S3 destination requires BucketARN")?
        .to_string();
    let prefix = value
        .get("Prefix")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    let error_output_prefix = value
        .get("ErrorOutputPrefix")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
    let mut buffering_size_mb = None;
    let mut buffering_interval_seconds = None;
    if let Some(hints) = value.get("BufferingHints") {
        buffering_size_mb = hints.get("SizeInMBs").and_then(|v| v.as_i64());
        buffering_interval_seconds = hints.get("IntervalInSeconds").and_then(|v| v.as_i64());
    }
    let compression_format = value
        .get("CompressionFormat")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());

    Ok(S3Destination {
        destination_id: "destination-1".to_string(),
        role_arn,
        bucket_arn,
        prefix,
        error_output_prefix,
        buffering_size_mb,
        buffering_interval_seconds,
        compression_format,
        processing_configuration: None,
        data_format_conversion_configuration: None,
        cloudwatch_logging_options: None,
        custom_time_zone: None,
        s3_backup_mode: None,
        file_extension: None,
    })
}

#[cfg(test)]
mod tests {
    use super::*;
    use parking_lot::RwLock;

    fn make_provisioner() -> ResourceProvisioner {
        ResourceProvisioner {
            sqs_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "http://localhost:4566",
                ),
            )),
            sns_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "http://localhost:4566",
                ),
            )),
            ssm_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "http://localhost:4566",
                ),
            )),
            iam_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", "http://localhost:4566"),
            )),
            s3_state: Arc::new(RwLock::new(fakecloud_core::multi_account::MultiAccountState::new(
                "123456789012",
                "us-east-1", "",
            ))),
            eventbridge_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            dynamodb_state: Arc::new(RwLock::new(fakecloud_core::multi_account::MultiAccountState::new(
                "123456789012",
                "us-east-1", "",
            ))),
            logs_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            lambda_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            secretsmanager_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            kinesis_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            kms_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            ecr_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            cloudwatch_state: Arc::new(RwLock::new(fakecloud_cloudwatch::CloudWatchAccounts::new())),
            elbv2_state: Arc::new(RwLock::new(fakecloud_elbv2::Elbv2Accounts::new())),
            organizations_state: Arc::new(RwLock::new(None)),
            cognito_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            rds_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            ec2_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            autoscaling_state: Arc::new(RwLock::new(
                fakecloud_autoscaling::AutoScalingAccounts::new(),
            )),
            batch_state: Arc::new(RwLock::new(fakecloud_batch::BatchAccounts::new())),
            ecs_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            acm_state: Arc::new(RwLock::new(fakecloud_acm::AcmAccounts::new())),
            elasticache_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            route53_state: Arc::new(RwLock::new(fakecloud_route53::Route53Accounts::new())),
            cloudfront_state: Arc::new(RwLock::new(
                fakecloud_cloudfront::CloudFrontAccounts::new(),
            )),
            cloudformation_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new("123456789012", "us-east-1", ""),
            )),
            stepfunctions_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "",
                ),
            )),
            wafv2_state: Arc::new(RwLock::new(fakecloud_wafv2::Wafv2Accounts::default())),
            apigateway_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "",
                ),
            )),
            apigatewayv2_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "",
                ),
            )),
            ses_state: Arc::new(RwLock::new(
                fakecloud_core::multi_account::MultiAccountState::new(
                    "123456789012",
                    "us-east-1",
                    "",
                ),
            )),
            app_autoscaling_state: Arc::new(parking_lot::RwLock::new(
                fakecloud_application_autoscaling::ApplicationAutoScalingAccounts::new(),
            )),
            athena_state: Arc::new(parking_lot::RwLock::new(
                fakecloud_athena::AthenaAccounts::new(),
            )),
            firehose_state: Arc::new(parking_lot::RwLock::new(
                fakecloud_firehose::FirehoseAccounts::new(),
            )),
            glue_state: Arc::new(parking_lot::RwLock::new(
                fakecloud_glue::GlueAccounts::new(),
            )),
            delivery: Arc::new(DeliveryBus::new()),
            lambda_runtime: None,
            s3_store: Arc::new(fakecloud_persistence::s3::MemoryS3Store::new()),
            account_id: "123456789012".to_string(),
            region: "us-east-1".to_string(),
            stack_id: "arn:aws:cloudformation:us-east-1:123456789012:stack/test/00000000-0000-0000-0000-000000000000".to_string(),
        }
    }

    fn make_resource(
        resource_type: &str,
        logical_id: &str,
        props: serde_json::Value,
    ) -> ResourceDefinition {
        ResourceDefinition {
            logical_id: logical_id.to_string(),
            resource_type: resource_type.to_string(),
            properties: props,
        }
    }

    #[test]
    fn update_stack_reconciles_iam_role_policies() {
        let prov = make_provisioner();
        let created = prov
            .create_resource(&make_resource(
                "AWS::IAM::Role",
                "R",
                serde_json::json!({
                    "RoleName": "r1",
                    "AssumeRolePolicyDocument": {"Version": "2012-10-17"},
                    "ManagedPolicyArns": ["arn:aws:iam::aws:policy/ReadOnlyAccess"],
                }),
            ))
            .expect("role provisions");
        prov.update_resource(
            &created,
            &make_resource(
                "AWS::IAM::Role",
                "R",
                serde_json::json!({
                    "RoleName": "r1",
                    "AssumeRolePolicyDocument": {"Version": "2012-10-17", "Statement": []},
                    "Description": "updated",
                    "ManagedPolicyArns": ["arn:aws:iam::aws:policy/AdministratorAccess"],
                    "Policies": [{"PolicyName": "inline1", "PolicyDocument": {"k": "v"}}],
                }),
            ),
        )
        .expect("update succeeds")
        .expect("IAM::Role is updatable");
        let iam = prov.iam_state.read();
        let acct = iam.get("123456789012").unwrap();
        let role = acct.roles.get("r1").unwrap();
        assert_eq!(role.description.as_deref(), Some("updated"));
        assert!(role.assume_role_policy_document.contains("Statement"));
        // Attached managed policies replaced, not appended.
        let attached = acct.role_policies.get("r1").unwrap();
        assert_eq!(
            attached,
            &vec!["arn:aws:iam::aws:policy/AdministratorAccess".to_string()]
        );
        assert!(acct
            .role_inline_policies
            .get("r1")
            .unwrap()
            .contains_key("inline1"));
    }

    #[test]
    fn update_stack_bumps_managed_policy_version() {
        let prov = make_provisioner();
        let created = prov
            .create_resource(&make_resource(
                "AWS::IAM::ManagedPolicy",
                "P",
                serde_json::json!({
                    "ManagedPolicyName": "p1",
                    "PolicyDocument": {"Version": "2012-10-17", "Statement": [{"Effect": "Allow"}]},
                }),
            ))
            .expect("managed policy provisions");
        prov.update_resource(
            &created,
            &make_resource(
                "AWS::IAM::ManagedPolicy",
                "P",
                serde_json::json!({
                    "ManagedPolicyName": "p1",
                    "PolicyDocument": {"Version": "2012-10-17", "Statement": [{"Effect": "Deny"}]},
                }),
            ),
        )
        .expect("update succeeds")
        .expect("IAM::ManagedPolicy is updatable");
        let iam = prov.iam_state.read();
        let acct = iam.get("123456789012").unwrap();
        let policy = acct.policies.get(&created.physical_id).unwrap();
        assert_eq!(policy.versions.len(), 2);
        assert_eq!(policy.default_version_id, "v2");
        let default = policy.versions.iter().find(|v| v.is_default).unwrap();
        assert!(default.document.contains("Deny"));
    }

    #[test]
    fn update_stack_applies_sqs_queue_property_change() {
        let prov = make_provisioner();
        let created = prov
            .create_resource(&make_resource(
                "AWS::SQS::Queue",
                "Q",
                serde_json::json!({ "QueueName": "q1", "VisibilityTimeout": "30" }),
            ))
            .expect("queue provisions");
        // UpdateStack changes a property; previously a no-op (`_ => None`).
        let updated = prov
            .update_resource(
                &created,
                &make_resource(
                    "AWS::SQS::Queue",
                    "Q",
                    serde_json::json!({ "QueueName": "q1", "VisibilityTimeout": "120" }),
                ),
            )
            .expect("update succeeds")
            .expect("SQS::Queue is an updatable type");
        assert_eq!(updated.physical_id, created.physical_id);
        let sqs = prov.sqs_state.read();
        let acct = sqs.get("123456789012").unwrap();
        let queue = acct.queues.get(&created.physical_id).unwrap();
        assert_eq!(
            queue
                .attributes
                .get("VisibilityTimeout")
                .map(String::as_str),
            Some("120")
        );
    }

    #[test]
    fn update_stack_applies_sns_topic_property_change() {
        let prov = make_provisioner();
        let created = prov
            .create_resource(&make_resource(
                "AWS::SNS::Topic",
                "T",
                serde_json::json!({ "TopicName": "t1", "DisplayName": "before" }),
            ))
            .expect("topic provisions");
        let updated = prov
            .update_resource(
                &created,
                &make_resource(
                    "AWS::SNS::Topic",
                    "T",
                    serde_json::json!({ "TopicName": "t1", "DisplayName": "after" }),
                ),
            )
            .expect("update succeeds")
            .expect("SNS::Topic is an updatable type");
        assert_eq!(updated.physical_id, created.physical_id);
        let sns = prov.sns_state.read();
        let acct = sns.get("123456789012").unwrap();
        let topic = acct.topics.get(&created.physical_id).unwrap();
        assert_eq!(
            topic.attributes.get("DisplayName").map(String::as_str),
            Some("after")
        );
    }

    #[test]
    fn ec2_vpc_subnet_provision_through_real_handlers() {
        let prov = make_provisioner();
        let vpc = prov
            .create_resource(&make_resource(
                "AWS::EC2::VPC",
                "Vpc",
                serde_json::json!({ "CidrBlock": "10.1.0.0/16" }),
            ))
            .expect("VPC provisions");
        assert!(
            vpc.physical_id.starts_with("vpc-"),
            "got {}",
            vpc.physical_id
        );
        // The real VPC handler ran: a VPC exists in EC2 state (with the default
        // SG/route-table/NACL the handler creates), not a recorded no-op.
        {
            let ec2 = prov.ec2_state.read();
            let acct = ec2.get("123456789012").unwrap();
            assert!(acct.vpcs.contains_key(&vpc.physical_id));
        }
        // GetAtt VpcId/CidrBlock resolve; Ref is the vpc id.
        assert_eq!(
            prov.get_att(&vpc, "VpcId").as_deref(),
            Some(vpc.physical_id.as_str())
        );
        assert_eq!(
            prov.get_att(&vpc, "CidrBlock").as_deref(),
            Some("10.1.0.0/16")
        );

        // A subnet referencing the VPC (Ref already resolved to the physical id).
        let subnet = prov
            .create_resource(&make_resource(
                "AWS::EC2::Subnet",
                "Subnet",
                serde_json::json!({ "VpcId": vpc.physical_id, "CidrBlock": "10.1.1.0/24" }),
            ))
            .expect("subnet provisions");
        assert!(subnet.physical_id.starts_with("subnet-"));
        {
            let ec2 = prov.ec2_state.read();
            let acct = ec2.get("123456789012").unwrap();
            assert!(acct.subnets.contains_key(&subnet.physical_id));
        }

        // Delete routes through the real handler.
        prov.delete_resource(&subnet).expect("subnet deletes");
        prov.delete_resource(&vpc).expect("vpc deletes");
    }

    #[test]
    fn unknown_resource_type_records_instead_of_failing() {
        let prov = make_provisioner();
        // A real AWS type fakecloud has no provisioner for. It must NOT fail
        // the stack — it's recorded as provisioned with no backing state, and
        // `Ref` (its physical id) resolves to a stable value (the logical id).
        let sr = prov
            .create_resource(&make_resource(
                "AWS::CloudFormation::WaitConditionHandle",
                "Handle",
                serde_json::json!({}),
            ))
            .expect("unknown resource type should record, not fail");
        assert_eq!(sr.physical_id, "Handle");
        assert_eq!(sr.status, "CREATE_COMPLETE");
        // Teardown of a recorded no-op resource also succeeds.
        prov.delete_resource(&sr)
            .expect("delete no-op should succeed");
    }

    #[test]
    fn ecr_repository_uri_uses_bound_endpoint_not_public_dns() {
        // A CFN-provisioned RepositoryUri must point at fakecloud's own registry
        // endpoint, not the public AWS DNS, so `docker push` against the GetAtt
        // RepositoryUri reaches it (bug-audit 2026-06-20, 1.4).
        let prov = make_provisioner();
        let sr = prov
            .create_resource(&make_resource(
                "AWS::ECR::Repository",
                "Repo",
                serde_json::json!({ "RepositoryName": "my-repo" }),
            ))
            .expect("ECR repo provisions");
        let uri = sr
            .attributes
            .get("RepositoryUri")
            .expect("RepositoryUri attribute");
        assert!(
            !uri.contains("amazonaws.com"),
            "RepositoryUri must not use the public ECR DNS, got {uri}"
        );
        assert!(uri.contains("my-repo"), "uri should name the repo: {uri}");
    }

    #[test]
    fn sns_subscription_rejects_nonexistent_topic() {
        let prov = make_provisioner();
        let resource = make_resource(
            "AWS::SNS::Subscription",
            "MySub",
            serde_json::json!({
                "TopicArn": "arn:aws:sns:us-east-1:123456789012:NonExistent",
                "Protocol": "sqs",
                "Endpoint": "arn:aws:sqs:us-east-1:123456789012:my-queue"
            }),
        );
        let result = prov.create_resource(&resource);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("does not exist"));
    }

    #[test]
    fn sns_subscription_succeeds_when_topic_exists() {
        let prov = make_provisioner();
        // First create the topic
        let topic = make_resource(
            "AWS::SNS::Topic",
            "MyTopic",
            serde_json::json!({ "TopicName": "my-topic" }),
        );
        let topic_result = prov.create_resource(&topic);
        assert!(topic_result.is_ok());
        let topic_arn = topic_result.unwrap().physical_id;

        // Now create subscription referencing that topic
        let sub = make_resource(
            "AWS::SNS::Subscription",
            "MySub",
            serde_json::json!({
                "TopicArn": topic_arn,
                "Protocol": "sqs",
                "Endpoint": "arn:aws:sqs:us-east-1:123456789012:my-queue"
            }),
        );
        let result = prov.create_resource(&sub);
        assert!(result.is_ok());
    }

    #[test]
    fn eventbridge_rule_arn_default_bus_omits_bus_name() {
        let prov = make_provisioner();
        let resource = make_resource(
            "AWS::Events::Rule",
            "MyRule",
            serde_json::json!({
                "Name": "my-rule",
                "ScheduleExpression": "rate(1 hour)"
            }),
        );
        let result = prov.create_resource(&resource).unwrap();
        // For default bus, ARN should be rule/<name> without /default/
        assert_eq!(
            result.physical_id,
            "arn:aws:events:us-east-1:123456789012:rule/my-rule"
        );
        assert!(!result.physical_id.contains("rule/default/"));
    }

    #[test]
    fn eventbridge_rule_arn_custom_bus_includes_bus_name() {
        let prov = make_provisioner();
        // Create a custom bus first
        {
            let mut eb_accounts = prov.eventbridge_state.write();
            let state = eb_accounts.default_mut();
            state.buses.insert(
                "custom-bus".to_string(),
                fakecloud_eventbridge::EventBus {
                    name: "custom-bus".to_string(),
                    arn: "arn:aws:events:us-east-1:123456789012:event-bus/custom-bus".to_string(),
                    policy: None,
                    creation_time: Utc::now(),
                    last_modified_time: Utc::now(),
                    description: None,
                    kms_key_identifier: None,
                    dead_letter_config: None,
                    tags: std::collections::BTreeMap::new(),
                },
            );
        }
        let resource = make_resource(
            "AWS::Events::Rule",
            "MyRule",
            serde_json::json!({
                "Name": "my-rule",
                "EventBusName": "custom-bus",
                "ScheduleExpression": "rate(1 hour)"
            }),
        );
        let result = prov.create_resource(&resource).unwrap();
        assert_eq!(
            result.physical_id,
            "arn:aws:events:us-east-1:123456789012:rule/custom-bus/my-rule"
        );
    }

    #[test]
    fn eventbridge_rule_rejects_nonexistent_bus() {
        let prov = make_provisioner();
        let resource = make_resource(
            "AWS::Events::Rule",
            "MyRule",
            serde_json::json!({
                "Name": "my-rule",
                "EventBusName": "nonexistent-bus",
                "ScheduleExpression": "rate(1 hour)"
            }),
        );
        let result = prov.create_resource(&resource);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("does not exist"));
    }

    #[test]
    fn custom_resource_requires_service_token() {
        let prov = make_provisioner();
        let resource = make_resource(
            "Custom::MyResource",
            "MyCustom",
            serde_json::json!({
                "Foo": "bar"
            }),
        );
        let result = prov.create_resource(&resource);
        assert!(result.is_err());
        assert!(
            result.unwrap_err().contains("ServiceToken"),
            "Should require ServiceToken property"
        );
    }

    #[test]
    fn custom_resource_succeeds_without_lambda_delivery() {
        // When no Lambda delivery is configured, custom resource creation
        // should still succeed (the invocation is silently skipped).
        let prov = make_provisioner();
        let resource = make_resource(
            "Custom::MyResource",
            "MyCustom",
            serde_json::json!({
                "ServiceToken": "arn:aws:lambda:us-east-1:123456789012:function:my-func",
                "Foo": "bar"
            }),
        );
        let result = prov.create_resource(&resource);
        assert!(result.is_ok());
        let sr = result.unwrap();
        assert_eq!(sr.logical_id, "MyCustom");
        assert_eq!(sr.resource_type, "Custom::MyResource");
        assert!(sr.physical_id.starts_with("MyCustom-"));
    }

    #[test]
    fn cloudformation_custom_resource_type_succeeds() {
        let prov = make_provisioner();
        let resource = make_resource(
            "AWS::CloudFormation::CustomResource",
            "MyCustom2",
            serde_json::json!({
                "ServiceToken": "arn:aws:lambda:us-east-1:123456789012:function:my-func",
                "Key": "value"
            }),
        );
        let result = prov.create_resource(&resource);
        assert!(result.is_ok());
        let sr = result.unwrap();
        assert_eq!(sr.resource_type, "AWS::CloudFormation::CustomResource");
    }

    // ── Resource create/delete lifecycle tests ──

    #[test]
    fn sqs_queue_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SQS::Queue",
            "MyQ",
            serde_json::json!({"QueueName": "my-q"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("my-q"));
        assert_eq!(sr.resource_type, "AWS::SQS::Queue");
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn sqs_queue_fifo_with_suffix() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SQS::Queue",
            "FifoQ",
            serde_json::json!({"QueueName": "my-fifo.fifo", "FifoQueue": true}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains(".fifo"));
    }

    #[test]
    fn sns_topic_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SNS::Topic",
            "MyTopic",
            serde_json::json!({"TopicName": "t1"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("t1"));
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn ssm_parameter_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SSM::Parameter",
            "MyParam",
            serde_json::json!({
                "Name": "/my/param",
                "Type": "String",
                "Value": "v1"
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "/my/param");
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn iam_role_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::IAM::Role",
            "MyRole",
            serde_json::json!({
                "RoleName": "my-role",
                "AssumeRolePolicyDocument": {"Version": "2012-10-17", "Statement": []}
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("my-role"));
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn iam_policy_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::IAM::Policy",
            "MyPolicy",
            serde_json::json!({
                "PolicyName": "my-policy",
                "PolicyDocument": {"Version": "2012-10-17", "Statement": []}
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("my-policy"));
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn s3_bucket_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::S3::Bucket",
            "MyBucket",
            serde_json::json!({"BucketName": "my-bucket"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-bucket");
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn sqs_queue_policy_stored_on_queue_and_cleared_on_delete() {
        let prov = make_provisioner();
        let queue = prov
            .create_resource(&make_resource(
                "AWS::SQS::Queue",
                "Q",
                serde_json::json!({"QueueName": "q1"}),
            ))
            .unwrap();
        // `Queues` carries the queue URL — what `Ref` resolves to.
        let policy = make_resource(
            "AWS::SQS::QueuePolicy",
            "QP",
            serde_json::json!({
                "Queues": [queue.physical_id.clone()],
                "PolicyDocument": {"Version": "2012-10-17", "Statement": [{
                    "Effect": "Allow",
                    "Principal": {"Service": "sns.amazonaws.com"},
                    "Action": "sqs:SendMessage",
                    "Resource": "*"
                }]}
            }),
        );
        let sr = prov.create_resource(&policy).unwrap();

        {
            let mut accounts = prov.sqs_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            let stored = state.queues[&queue.physical_id]
                .attributes
                .get("Policy")
                .expect("policy stored on queue");
            assert!(stored.contains("sqs:SendMessage"));
        }

        prov.delete_resource(&sr).unwrap();
        {
            let mut accounts = prov.sqs_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            assert!(!state.queues[&queue.physical_id]
                .attributes
                .contains_key("Policy"));
        }
    }

    #[test]
    fn sns_topic_policy_stored_on_topic_and_cleared_on_delete() {
        let prov = make_provisioner();
        let topic = prov
            .create_resource(&make_resource(
                "AWS::SNS::Topic",
                "T",
                serde_json::json!({"TopicName": "t1"}),
            ))
            .unwrap();
        let policy = make_resource(
            "AWS::SNS::TopicPolicy",
            "TP",
            serde_json::json!({
                "Topics": [topic.physical_id.clone()],
                "PolicyDocument": {"Version": "2012-10-17", "Statement": [{
                    "Effect": "Allow",
                    "Principal": {"Service": "events.amazonaws.com"},
                    "Action": "sns:Publish",
                    "Resource": "*"
                }]}
            }),
        );
        let sr = prov.create_resource(&policy).unwrap();

        {
            let mut accounts = prov.sns_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            let stored = state.topics[&topic.physical_id]
                .attributes
                .get("Policy")
                .expect("policy stored on topic");
            assert!(stored.contains("sns:Publish"));
        }

        prov.delete_resource(&sr).unwrap();
        {
            let mut accounts = prov.sns_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            assert!(!state.topics[&topic.physical_id]
                .attributes
                .contains_key("Policy"));
        }
    }

    #[test]
    fn s3_bucket_policy_stored_on_bucket_and_cleared_on_delete() {
        let prov = make_provisioner();
        let bucket = prov
            .create_resource(&make_resource(
                "AWS::S3::Bucket",
                "B",
                serde_json::json!({"BucketName": "b1"}),
            ))
            .unwrap();
        let policy = make_resource(
            "AWS::S3::BucketPolicy",
            "BP",
            serde_json::json!({
                "Bucket": bucket.physical_id.clone(),
                "PolicyDocument": {"Version": "2012-10-17", "Statement": [{
                    "Effect": "Allow",
                    "Principal": "*",
                    "Action": "s3:GetObject",
                    "Resource": "arn:aws:s3:::b1/*"
                }]}
            }),
        );
        let sr = prov.create_resource(&policy).unwrap();
        assert_eq!(sr.physical_id, "b1-policy");

        {
            let mut accounts = prov.s3_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            let stored = state.buckets[&bucket.physical_id]
                .policy
                .as_ref()
                .expect("policy stored on bucket");
            assert!(stored.contains("s3:GetObject"));
        }

        prov.delete_resource(&sr).unwrap();
        {
            let mut accounts = prov.s3_state.write();
            let state = accounts.get_or_create(&prov.account_id);
            assert!(state.buckets[&bucket.physical_id].policy.is_none());
        }
    }

    #[test]
    fn dynamodb_table_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::DynamoDB::Table",
            "MyTable",
            serde_json::json!({
                "TableName": "my-table",
                "KeySchema": [{"AttributeName": "pk", "KeyType": "HASH"}],
                "AttributeDefinitions": [{"AttributeName": "pk", "AttributeType": "S"}],
                "BillingMode": "PAY_PER_REQUEST"
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("my-table"));
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn log_group_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Logs::LogGroup",
            "MyLogs",
            serde_json::json!({"LogGroupName": "/app/logs"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("/app/logs"));
        prov.delete_resource(&sr).unwrap();
    }

    #[test]
    fn lambda_function_create_and_delete() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Lambda::Function",
            "MyFn",
            serde_json::json!({
                "FunctionName": "my-fn",
                "Runtime": "nodejs20.x",
                "Role": "arn:aws:iam::123456789012:role/lambda-role",
                "Handler": "index.handler",
                "MemorySize": 256,
                "Timeout": 10,
                "Environment": {"Variables": {"FOO": "bar"}}
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-fn");
        assert_eq!(
            sr.attributes.get("Arn").map(String::as_str),
            Some("arn:aws:lambda:us-east-1:123456789012:function:my-fn")
        );
        // Verify it landed in lambda state
        {
            let lam = prov.lambda_state.read();
            let st = lam.get("123456789012").unwrap();
            let f = st.functions.get("my-fn").unwrap();
            assert_eq!(f.runtime, "nodejs20.x");
            assert_eq!(f.memory_size, 256);
            assert_eq!(f.environment.get("FOO").unwrap(), "bar");
        }
        prov.delete_resource(&sr).unwrap();
        let lam = prov.lambda_state.read();
        let st = lam.get("123456789012").unwrap();
        assert!(!st.functions.contains_key("my-fn"));
    }

    #[test]
    fn unsupported_resource_type_is_recorded_not_failed() {
        // An unmodelled type is recorded as provisioned (no backing state)
        // rather than failing the stack — see
        // `unknown_resource_type_records_instead_of_failing`.
        let prov = make_provisioner();
        let res = make_resource("AWS::NonExistent::Thing", "X", serde_json::json!({}));
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "X");
    }

    #[test]
    fn iam_role_with_inline_policies() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::IAM::Role",
            "MyRole",
            serde_json::json!({
                "RoleName": "role-inline",
                "AssumeRolePolicyDocument": {"Version": "2012-10-17", "Statement": []},
                "Policies": [
                    {
                        "PolicyName": "inline-1",
                        "PolicyDocument": {"Version": "2012-10-17", "Statement": []}
                    }
                ]
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("role-inline"));
    }

    #[test]
    fn sqs_queue_auto_name() {
        let prov = make_provisioner();
        let res = make_resource("AWS::SQS::Queue", "AutoQ", serde_json::json!({}));
        let sr = prov.create_resource(&res).unwrap();
        // Generated queue name should exist
        assert!(!sr.physical_id.is_empty());
    }

    #[test]
    fn sns_topic_auto_name() {
        let prov = make_provisioner();
        let res = make_resource("AWS::SNS::Topic", "AutoT", serde_json::json!({}));
        let sr = prov.create_resource(&res).unwrap();
        assert!(!sr.physical_id.is_empty());
    }

    // ── additional resource types ──

    #[test]
    fn unsupported_resource_type_recorded_with_logical_id() {
        // Recorded, not failed; physical id is the logical id so `Ref` resolves.
        let prov = make_provisioner();
        let res = make_resource("AWS::FooBar::Thing", "X", serde_json::json!({}));
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "X");
        assert_eq!(sr.status, "CREATE_COMPLETE");
    }

    #[test]
    fn sqs_queue_with_redrive_policy() {
        let prov = make_provisioner();
        // Create DLQ first
        let dlq = make_resource(
            "AWS::SQS::Queue",
            "DLQ",
            serde_json::json!({"QueueName": "dlq1"}),
        );
        let dlq_resource = prov.create_resource(&dlq).unwrap();
        let _ = dlq_resource.physical_id;

        // Create source queue with redrive policy
        let src = make_resource(
            "AWS::SQS::Queue",
            "Src",
            serde_json::json!({
                "QueueName": "src1",
                "RedrivePolicy": {
                    "deadLetterTargetArn": "arn:aws:sqs:us-east-1:123456789012:dlq1",
                    "maxReceiveCount": 3
                }
            }),
        );
        let sr = prov.create_resource(&src).unwrap();
        assert!(!sr.physical_id.is_empty());
    }

    #[test]
    fn sns_topic_with_display_name() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SNS::Topic",
            "WithName",
            serde_json::json!({"TopicName": "named-topic", "DisplayName": "Named"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("named-topic"));
    }

    #[test]
    fn ssm_parameter_with_explicit_name() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SSM::Parameter",
            "Param",
            serde_json::json!({"Name": "/my/param", "Value": "v", "Type": "String"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.contains("/my/param"));
    }

    #[test]
    fn ssm_parameter_missing_name_errors() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SSM::Parameter",
            "AutoP",
            serde_json::json!({"Value": "v", "Type": "String"}),
        );
        assert!(prov.create_resource(&res).is_err());
    }

    #[test]
    fn iam_managed_policy_auto_name() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::IAM::Policy",
            "AutoPol",
            serde_json::json!({
                "PolicyName": "inline-pol",
                "PolicyDocument": {"Version": "2012-10-17", "Statement": []},
                "Users": []
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(!sr.physical_id.is_empty());
    }

    #[test]
    fn delete_resource_works_for_queue() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SQS::Queue",
            "ToDel",
            serde_json::json!({"QueueName": "todel"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(prov.delete_resource(&sr).is_ok());
    }

    #[test]
    fn delete_resource_works_for_topic() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SNS::Topic",
            "DelT",
            serde_json::json!({"TopicName": "delt"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(prov.delete_resource(&sr).is_ok());
    }

    #[test]
    fn application_autoscaling_scalable_target_round_trip() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::ApplicationAutoScaling::ScalableTarget",
            "Target",
            serde_json::json!({
                "ServiceNamespace": "ecs",
                "ResourceId": "service/my-cluster/my-service",
                "ScalableDimension": "ecs:service:DesiredCount",
                "MinCapacity": 1,
                "MaxCapacity": 10,
                "RoleARN": "arn:aws:iam::123456789012:role/my-role",
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "service/my-cluster/my-service");
        assert!(sr.attributes.contains_key("ScalableTargetARN"));
        assert!(prov.delete_resource(&sr).is_ok());
    }

    #[test]
    fn application_autoscaling_scaling_policy_requires_target() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Policy",
            serde_json::json!({
                "PolicyName": "my-policy",
                "ServiceNamespace": "ecs",
                "ResourceId": "service/my-cluster/my-service",
                "ScalableDimension": "ecs:service:DesiredCount",
                "PolicyType": "TargetTrackingScaling",
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 50.0,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "ECSServiceAverageCPUUtilization"
                    }
                },
            }),
        );
        // Should fail because scalable target does not exist
        assert!(prov.create_resource(&res).is_err());
    }

    #[test]
    fn application_autoscaling_scaling_policy_round_trip() {
        let prov = make_provisioner();
        let target = make_resource(
            "AWS::ApplicationAutoScaling::ScalableTarget",
            "Target",
            serde_json::json!({
                "ServiceNamespace": "ecs",
                "ResourceId": "service/my-cluster/my-service",
                "ScalableDimension": "ecs:service:DesiredCount",
                "MinCapacity": 1,
                "MaxCapacity": 10,
            }),
        );
        let sr = prov.create_resource(&target).unwrap();

        let policy = make_resource(
            "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Policy",
            serde_json::json!({
                "PolicyName": "my-policy",
                "ServiceNamespace": "ecs",
                "ResourceId": "service/my-cluster/my-service",
                "ScalableDimension": "ecs:service:DesiredCount",
                "PolicyType": "TargetTrackingScaling",
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 50.0,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "ECSServiceAverageCPUUtilization"
                    }
                },
            }),
        );
        let psr = prov.create_resource(&policy).unwrap();
        assert!(psr.physical_id.starts_with("arn:aws:autoscaling:"));
        assert!(prov.delete_resource(&psr).is_ok());
        assert!(prov.delete_resource(&sr).is_ok());
    }

    #[test]
    fn sqs_queue_with_fifo_suffix() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SQS::Queue",
            "Fifo",
            serde_json::json!({"QueueName": "fq.fifo", "FifoQueue": true}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.ends_with(".fifo"));
    }

    // ── get_att dispatch ──

    #[test]
    fn getatt_s3_bucket_arn_returns_arn() {
        let prov = make_provisioner();
        let bucket = make_resource(
            "AWS::S3::Bucket",
            "MyBucket",
            serde_json::json!({"BucketName": "my-bucket"}),
        );
        let sr = prov.create_resource(&bucket).unwrap();
        assert_eq!(
            prov.get_att(&sr, "Arn"),
            Some("arn:aws:s3:::my-bucket".to_string())
        );
    }

    #[test]
    fn getatt_s3_bucket_domain_name_returns_dns_name() {
        let prov = make_provisioner();
        let bucket = make_resource(
            "AWS::S3::Bucket",
            "MyBucket",
            serde_json::json!({"BucketName": "my-bucket"}),
        );
        let sr = prov.create_resource(&bucket).unwrap();
        assert_eq!(
            prov.get_att(&sr, "DomainName"),
            Some("my-bucket.s3.amazonaws.com".to_string())
        );
    }

    #[test]
    fn getatt_lambda_function_arn_returns_function_arn() {
        let prov = make_provisioner();
        // Lambda needs an existing IAM role to validate the function role.
        let role = make_resource(
            "AWS::IAM::Role",
            "MyRole",
            serde_json::json!({
                "RoleName": "my-role",
                "AssumeRolePolicyDocument": {"Version": "2012-10-17", "Statement": []}
            }),
        );
        let role_sr = prov.create_resource(&role).unwrap();
        let fn_res = make_resource(
            "AWS::Lambda::Function",
            "MyFn",
            serde_json::json!({
                "FunctionName": "my-fn",
                "Runtime": "python3.11",
                "Handler": "index.handler",
                "Role": role_sr.physical_id,
                "Code": {"ZipFile": "def handler(e,c): return e"}
            }),
        );
        let fn_sr = prov.create_resource(&fn_res).unwrap();
        let arn = prov.get_att(&fn_sr, "Arn").expect("Arn should resolve");
        assert!(arn.starts_with("arn:aws:lambda:"));
        assert!(arn.contains(":function:my-fn"));
    }

    #[test]
    fn getatt_iam_role_arn_returns_role_arn() {
        let prov = make_provisioner();
        let role = make_resource(
            "AWS::IAM::Role",
            "MyRole",
            serde_json::json!({
                "RoleName": "my-role",
                "AssumeRolePolicyDocument": {"Version": "2012-10-17", "Statement": []}
            }),
        );
        let sr = prov.create_resource(&role).unwrap();
        assert_eq!(
            prov.get_att(&sr, "Arn"),
            Some("arn:aws:iam::123456789012:role/my-role".to_string())
        );
        // RoleId is a real value generated at create time (FKIA-prefixed).
        let role_id = prov.get_att(&sr, "RoleId").expect("RoleId should resolve");
        assert!(role_id.starts_with("FKIA"));
    }

    #[test]
    fn getatt_unknown_attribute_returns_none() {
        let prov = make_provisioner();
        let bucket = make_resource(
            "AWS::S3::Bucket",
            "MyBucket",
            serde_json::json!({"BucketName": "my-bucket"}),
        );
        let sr = prov.create_resource(&bucket).unwrap();
        // Fall-back behaviour: unknown attribute on a known type returns
        // None; the resolver in template.rs surfaces a "Logical.Attr"
        // placeholder so the existing template still builds.
        assert_eq!(prov.get_att(&sr, "NotARealAttr"), None);
    }

    #[test]
    fn getatt_unknown_resource_type_returns_none() {
        let prov = make_provisioner();
        // Hand-crafted StackResource with a resource_type we don't dispatch
        // on at all. The captured attributes map is also empty, so there's
        // nothing to return.
        let stack_resource = StackResource {
            logical_id: "Mystery".to_string(),
            physical_id: "mystery-id".to_string(),
            resource_type: "AWS::Made::Up".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&stack_resource, "Arn"), None);
    }

    #[test]
    fn getatt_falls_back_to_captured_attributes() {
        let prov = make_provisioner();
        // Captured attributes always win — even if live-state dispatch
        // would return something different. This keeps `Fn::GetAtt`
        // deterministic for resources with cached attrs.
        let stack_resource = StackResource {
            logical_id: "MyTopic".to_string(),
            physical_id: "arn:aws:sns:us-east-1:123456789012:my-topic".to_string(),
            resource_type: "AWS::SNS::Topic".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: {
                let mut m = BTreeMap::new();
                m.insert("TopicArn".to_string(), "captured-arn".to_string());
                m
            },
        };
        assert_eq!(
            prov.get_att(&stack_resource, "TopicArn"),
            Some("captured-arn".to_string())
        );
    }

    #[test]
    fn getatt_secrets_manager_arn_resolves_via_live_state() {
        // Secrets create handler captures Id but not Arn; live-state
        // fallback fills in Arn.
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SecretsManager::Secret",
            "MySecret",
            serde_json::json!({"Name": "my-secret", "SecretString": "hunter2"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        let arn = prov.get_att(&sr, "Arn").expect("Arn should resolve");
        assert!(arn.starts_with("arn:aws:secretsmanager:"));
        assert!(arn.ends_with(":secret:my-secret"));
    }

    #[test]
    fn wafv2_web_acl_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::WebACL",
            "MyAcl",
            serde_json::json!({
                "Name": "my-acl",
                "Scope": "REGIONAL",
                "DefaultAction": {"Allow": {}},
                "Rules": [{"Name": "rule1", "Priority": 1, "Statement": {}, "VisibilityConfig": {}}],
                "VisibilityConfig": {"SampledRequestsEnabled": true, "CloudWatchMetricsEnabled": true, "MetricName": "my-acl-metric"},
                "Capacity": 100,
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.starts_with("arn:aws:wafv2:"));
        assert_eq!(prov.get_att(&sr, "Arn"), Some(sr.physical_id.clone()));
        assert_eq!(prov.get_att(&sr, "Name"), Some("my-acl".to_string()));
        assert!(prov.get_att(&sr, "Id").is_some());
        assert_eq!(prov.get_att(&sr, "Capacity"), Some("100".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        // Verify live-state fallback returns None by using a fresh resource
        // with empty attributes (captured attrs would still win).
        let fresh = StackResource {
            logical_id: "MyAcl".to_string(),
            physical_id: sr.physical_id.clone(),
            resource_type: "AWS::WAFv2::WebACL".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "Arn"), None);
    }

    #[test]
    fn wafv2_ip_set_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::IPSet",
            "MyIpSet",
            serde_json::json!({
                "Name": "my-ipset",
                "Scope": "REGIONAL",
                "IPAddressVersion": "IPV4",
                "Addresses": ["10.0.0.0/8"],
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.starts_with("arn:aws:wafv2:"));
        assert_eq!(prov.get_att(&sr, "Arn"), Some(sr.physical_id.clone()));
        assert_eq!(prov.get_att(&sr, "Name"), Some("my-ipset".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyIpSet".to_string(),
            physical_id: sr.physical_id.clone(),
            resource_type: "AWS::WAFv2::IPSet".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "Arn"), None);
    }

    #[test]
    fn wafv2_regex_pattern_set_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::RegexPatternSet",
            "MyRegexSet",
            serde_json::json!({
                "Name": "my-regex",
                "Scope": "REGIONAL",
                "RegularExpressions": [{"RegexString": "^test"}],
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.starts_with("arn:aws:wafv2:"));
        assert_eq!(prov.get_att(&sr, "Arn"), Some(sr.physical_id.clone()));
        assert_eq!(prov.get_att(&sr, "Name"), Some("my-regex".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyRegexSet".to_string(),
            physical_id: sr.physical_id.clone(),
            resource_type: "AWS::WAFv2::RegexPatternSet".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "Arn"), None);
    }

    #[test]
    fn wafv2_rule_group_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::RuleGroup",
            "MyRuleGroup",
            serde_json::json!({
                "Name": "my-rg",
                "Scope": "REGIONAL",
                "Capacity": 50,
                "Rules": [{"Name": "r1", "Priority": 1, "Statement": {}, "VisibilityConfig": {}}],
                "VisibilityConfig": {"SampledRequestsEnabled": true, "CloudWatchMetricsEnabled": true, "MetricName": "rg-metric"},
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(sr.physical_id.starts_with("arn:aws:wafv2:"));
        assert_eq!(prov.get_att(&sr, "Arn"), Some(sr.physical_id.clone()));
        assert_eq!(prov.get_att(&sr, "Name"), Some("my-rg".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyRuleGroup".to_string(),
            physical_id: sr.physical_id.clone(),
            resource_type: "AWS::WAFv2::RuleGroup".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "Arn"), None);
    }

    #[test]
    fn wafv2_logging_configuration_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::LoggingConfiguration",
            "MyLogConfig",
            serde_json::json!({
                "ResourceArn": "arn:aws:wafv2:us-east-1:123456789012:regional/webacl/test/abc",
                "LogDestinationConfigs": ["arn:aws:logs:us-east-1:123456789012:log-group:/aws/waf"],
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(
            sr.physical_id,
            "arn:aws:wafv2:us-east-1:123456789012:regional/webacl/test/abc"
        );

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn wafv2_web_acl_association_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::WAFv2::WebACLAssociation",
            "MyAssoc",
            serde_json::json!({
                "ResourceArn": "arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/my-alb/50dc6c495c0c9188",
                "WebACLArn": "arn:aws:wafv2:us-east-1:123456789012:regional/webacl/my-acl/abc",
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/my-alb/50dc6c495c0c9188");

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn ses_configuration_set_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::ConfigurationSet",
            "MyConfigSet",
            serde_json::json!({
                "Name": "my-cs",
                "SendingOptions": {"SendingEnabled": true},
                "DeliveryOptions": {"TlsPolicy": "REQUIRE"},
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-cs");
        assert_eq!(prov.get_att(&sr, "Name"), Some("my-cs".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyConfigSet".to_string(),
            physical_id: "my-cs".to_string(),
            resource_type: "AWS::SES::ConfigurationSet".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "Name"), None);
    }

    #[test]
    fn ses_email_identity_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::EmailIdentity",
            "MyIdentity",
            serde_json::json!({"EmailIdentity": "example.com"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "example.com");
        assert_eq!(
            prov.get_att(&sr, "IdentityName"),
            Some("example.com".to_string())
        );

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyIdentity".to_string(),
            physical_id: "example.com".to_string(),
            resource_type: "AWS::SES::EmailIdentity".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "IdentityName"), None);
    }

    #[test]
    fn ses_template_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::Template",
            "MyTemplate",
            serde_json::json!({
                "Template": {
                    "TemplateName": "my-tpl",
                    "SubjectPart": "Hello",
                    "HtmlPart": "<h1>Hi</h1>",
                    "TextPart": "Hi",
                },
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-tpl");
        assert_eq!(
            prov.get_att(&sr, "TemplateName"),
            Some("my-tpl".to_string())
        );

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyTemplate".to_string(),
            physical_id: "my-tpl".to_string(),
            resource_type: "AWS::SES::Template".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "TemplateName"), None);
    }

    #[test]
    fn ses_contact_list_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::ContactList",
            "MyContactList",
            serde_json::json!({
                "ContactListName": "my-cl",
                "Description": "Test contacts",
                "Topics": [{"TopicName": "news", "DisplayName": "Newsletter", "Description": "Weekly news"}],
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-cl");
        assert_eq!(
            prov.get_att(&sr, "ContactListName"),
            Some("my-cl".to_string())
        );

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyContactList".to_string(),
            physical_id: "my-cl".to_string(),
            resource_type: "AWS::SES::ContactList".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "ContactListName"), None);
    }

    #[test]
    fn ses_dedicated_ip_pool_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::DedicatedIpPool",
            "MyPool",
            serde_json::json!({"PoolName": "my-pool", "ScalingMode": "STANDARD"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-pool");
        assert_eq!(prov.get_att(&sr, "PoolName"), Some("my-pool".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyPool".to_string(),
            physical_id: "my-pool".to_string(),
            resource_type: "AWS::SES::DedicatedIpPool".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "PoolName"), None);
    }

    #[test]
    fn ses_receipt_rule_set_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::ReceiptRuleSet",
            "MyRuleSet",
            serde_json::json!({"RuleSetName": "my-rs"}),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-rs");
        assert_eq!(prov.get_att(&sr, "RuleSetName"), Some("my-rs".to_string()));

        prov.delete_resource(&sr.clone()).unwrap();
        let fresh = StackResource {
            logical_id: "MyRuleSet".to_string(),
            physical_id: "my-rs".to_string(),
            resource_type: "AWS::SES::ReceiptRuleSet".to_string(),
            status: "CREATE_COMPLETE".to_string(),
            service_token: None,
            attributes: BTreeMap::new(),
        };
        assert_eq!(prov.get_att(&fresh, "RuleSetName"), None);
    }

    #[test]
    fn ses_receipt_rule_lifecycle() {
        let prov = make_provisioner();
        let rs = make_resource(
            "AWS::SES::ReceiptRuleSet",
            "MyRuleSet",
            serde_json::json!({"RuleSetName": "my-rs2"}),
        );
        prov.create_resource(&rs).unwrap();

        let res = make_resource(
            "AWS::SES::ReceiptRule",
            "MyRule",
            serde_json::json!({
                "RuleSetName": "my-rs2",
                "Rule": {
                    "Name": "rule1",
                    "Priority": 1,
                    "Enabled": true,
                    "Actions": [{"S3Action": {"BucketName": "my-bucket"}}],
                },
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-rs2|rule1");

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn ses_receipt_filter_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::ReceiptFilter",
            "MyFilter",
            serde_json::json!({
                "Filter": {
                    "Name": "my-filter",
                    "IpFilter": {"Policy": "Block", "Cidr": "10.0.0.0/8"},
                },
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-filter");

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn ses_vdm_attributes_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::SES::VdmAttributes",
            "MyVdm",
            serde_json::json!({
                "DashboardAttributes": {"EngagementMetrics": "ENABLED"},
                "GuardianAttributes": {"OptimizedSharedDelivery": "ENABLED"},
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "vdm-MyVdm");

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn athena_work_group_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Athena::WorkGroup",
            "MyWg",
            serde_json::json!({
                "Name": "my-wg",
                "Description": "test wg",
                "Configuration": {"EnforceWorkGroupConfiguration": true},
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-wg");
        assert_eq!(sr.attributes.get("Name"), Some(&"my-wg".to_string()));
        assert!(sr
            .attributes
            .get("Arn")
            .unwrap()
            .contains("workgroup/my-wg"));

        assert_eq!(
            prov.get_att(
                &StackResource {
                    resource_type: "AWS::Athena::WorkGroup".to_string(),
                    physical_id: sr.physical_id.clone(),
                    logical_id: "MyWg".to_string(),
                    status: "CREATE_COMPLETE".to_string(),
                    service_token: None,
                    attributes: BTreeMap::new(),
                },
                "Name",
            ),
            Some("my-wg".to_string()),
        );

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn athena_data_catalog_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Athena::DataCatalog",
            "MyCatalog",
            serde_json::json!({
                "Name": "my-catalog",
                "Type": "GLUE",
                "Description": "test catalog",
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "my-catalog");
        assert_eq!(sr.attributes.get("Name"), Some(&"my-catalog".to_string()));
        assert!(sr
            .attributes
            .get("Arn")
            .unwrap()
            .contains("datacatalog/my-catalog"));

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn athena_named_query_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Athena::NamedQuery",
            "MyQuery",
            serde_json::json!({
                "Name": "my-query",
                "Database": "mydb",
                "QueryString": "SELECT 1",
                "WorkGroup": "primary",
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert!(!sr.physical_id.is_empty());
        assert_eq!(sr.attributes.get("NamedQueryId"), Some(&sr.physical_id));

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn athena_prepared_statement_lifecycle() {
        let prov = make_provisioner();
        let res = make_resource(
            "AWS::Athena::PreparedStatement",
            "MyPs",
            serde_json::json!({
                "StatementName": "my-ps",
                "WorkGroupName": "primary",
                "QueryStatement": "SELECT 1",
            }),
        );
        let sr = prov.create_resource(&res).unwrap();
        assert_eq!(sr.physical_id, "primary|my-ps");

        prov.delete_resource(&sr.clone()).unwrap();
    }

    #[test]
    fn parse_lambda_function_name_handles_every_shape() {
        // Plain name, unqualified — passes through.
        assert_eq!(parse_lambda_function_name("my-func"), "my-func");
        // Bare name with an alias/version qualifier (what `Ref` on an
        // alias used to feed the ESM create path).
        assert_eq!(parse_lambda_function_name("my-func:live"), "my-func");
        assert_eq!(parse_lambda_function_name("my-func:42"), "my-func");
        // Full ARN, unqualified and qualified.
        assert_eq!(
            parse_lambda_function_name("arn:aws:lambda:us-east-1:123456789012:function:my-func"),
            "my-func"
        );
        assert_eq!(
            parse_lambda_function_name(
                "arn:aws:lambda:us-east-1:123456789012:function:my-func:live"
            ),
            "my-func"
        );
        // Partial ARN, unqualified and qualified.
        assert_eq!(
            parse_lambda_function_name("123456789012:function:my-func"),
            "my-func"
        );
        assert_eq!(
            parse_lambda_function_name("123456789012:function:my-func:live"),
            "my-func"
        );
    }

    #[test]
    fn alias_state_key_recovers_internal_key_from_arn() {
        // Alias ARN -> `{function}:{alias}` internal map key.
        assert_eq!(
            alias_state_key("arn:aws:lambda:us-east-1:123456789012:function:my-func:live"),
            "my-func:live"
        );
        // Legacy bare `name:alias` physical id is returned unchanged.
        assert_eq!(alias_state_key("my-func:live"), "my-func:live");
    }
}