rc-core 0.1.36

//! Lifecycle (ILM) configuration types
//!
//! Domain types for S3 bucket lifecycle rules including expiration,
//! transition, and noncurrent version management.

use std::collections::HashMap;
use std::fmt;

use serde::de::Error as _;
use serde::{Deserialize, Deserializer, Serialize};

/// Full lifecycle configuration for a bucket
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LifecycleConfiguration {
    /// Lifecycle rules
    #[serde(alias = "Rules")]
    pub rules: Vec<LifecycleRule>,
}

/// A single lifecycle rule
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct LifecycleRule {
    /// Rule identifier
    pub id: String,

    /// Whether the rule is enabled or disabled
    pub status: LifecycleRuleStatus,

    /// Key prefix filter
    #[serde(skip_serializing_if = "Option::is_none")]
    pub prefix: Option<String>,

    /// Tag-based filter (key=value pairs)
    #[serde(skip_serializing_if = "Option::is_none")]
    pub tags: Option<HashMap<String, String>>,

    /// Minimum object size in bytes for the rule filter.
    #[serde(
        skip_serializing_if = "Option::is_none",
        alias = "ObjectSizeGreaterThan",
        alias = "object_size_greater_than"
    )]
    pub object_size_greater_than: Option<i64>,

    /// Maximum object size in bytes for the rule filter.
    #[serde(
        skip_serializing_if = "Option::is_none",
        alias = "ObjectSizeLessThan",
        alias = "object_size_less_than"
    )]
    pub object_size_less_than: Option<i64>,

    /// Expiration settings for current object versions
    #[serde(skip_serializing_if = "Option::is_none")]
    pub expiration: Option<LifecycleExpiration>,

    /// Expire delete-marker history after the configured number of days.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub del_marker_expiration: Option<LifecycleDelMarkerExpiration>,

    /// Transition settings for current object versions
    #[serde(skip_serializing_if = "Option::is_none")]
    pub transition: Option<LifecycleTransition>,

    /// Additional transition settings for current object versions.
    ///
    /// `transition` remains the compatibility field for the first action;
    /// this collection carries any subsequent actions returned by S3.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub transitions: Vec<LifecycleTransition>,

    /// Expiration settings for noncurrent object versions
    #[serde(skip_serializing_if = "Option::is_none")]
    pub noncurrent_version_expiration: Option<NoncurrentVersionExpiration>,

    /// Transition settings for noncurrent object versions
    #[serde(skip_serializing_if = "Option::is_none")]
    pub noncurrent_version_transition: Option<NoncurrentVersionTransition>,

    /// Additional transition settings for noncurrent object versions.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub noncurrent_version_transitions: Vec<NoncurrentVersionTransition>,

    /// Days after initiation to abort incomplete multipart uploads
    #[serde(skip_serializing_if = "Option::is_none")]
    pub abort_incomplete_multipart_upload_days: Option<i32>,

    /// Whether to remove expired delete markers
    #[serde(skip_serializing_if = "Option::is_none")]
    pub expired_object_delete_marker: Option<bool>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct LifecycleRuleInput {
    #[serde(alias = "ID")]
    id: String,
    #[serde(alias = "Status")]
    status: LifecycleRuleStatus,
    #[serde(default, alias = "Prefix")]
    prefix: Option<String>,
    #[serde(default, alias = "Tags")]
    tags: Option<HashMap<String, String>>,
    #[serde(
        default,
        alias = "ObjectSizeGreaterThan",
        alias = "object_size_greater_than"
    )]
    object_size_greater_than: Option<i64>,
    #[serde(default, alias = "ObjectSizeLessThan", alias = "object_size_less_than")]
    object_size_less_than: Option<i64>,
    /// S3-shaped nested filter (`Filter.Prefix` / `Filter.Tag` / `Filter.And`).
    #[serde(default, alias = "Filter")]
    filter: Option<LifecycleFilterInput>,
    #[serde(default, alias = "Expiration")]
    expiration: Option<LifecycleExpirationInput>,
    #[serde(default, alias = "Transition")]
    transition: Option<LifecycleTransition>,
    #[serde(default, alias = "Transitions")]
    transitions: Vec<LifecycleTransition>,
    #[serde(default, alias = "NoncurrentVersionExpiration")]
    noncurrent_version_expiration: Option<NoncurrentVersionExpiration>,
    #[serde(default, alias = "NoncurrentVersionTransition")]
    noncurrent_version_transition: Option<NoncurrentVersionTransition>,
    #[serde(default, alias = "NoncurrentVersionTransitions")]
    noncurrent_version_transitions: Vec<NoncurrentVersionTransition>,
    #[serde(
        default,
        alias = "AbortIncompleteMultipartUploadDays",
        alias = "abort_incomplete_multipart_upload_days"
    )]
    abort_incomplete_multipart_upload_days: Option<i32>,
    /// S3-shaped nested abort action (`AbortIncompleteMultipartUpload.DaysAfterInitiation`).
    #[serde(
        default,
        alias = "AbortIncompleteMultipartUpload",
        alias = "abort_incomplete_multipart_upload"
    )]
    abort_incomplete_multipart_upload: Option<AbortIncompleteMultipartUploadInput>,

    #[serde(
        default,
        alias = "ExpiredObjectDeleteMarker",
        alias = "expired_object_delete_marker"
    )]
    expired_object_delete_marker: Option<bool>,

    #[serde(
        default,
        alias = "DelMarkerExpiration",
        alias = "del_marker_expiration"
    )]
    del_marker_expiration: Option<LifecycleDelMarkerInput>,
}

/// S3 `Filter` predicate: `Prefix`, a single `Tag`, an `And` combination, or a
/// standalone object-size bound.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct LifecycleFilterInput {
    #[serde(default, alias = "Prefix")]
    prefix: Option<String>,
    #[serde(default, alias = "Tag")]
    tag: Option<LifecycleTagInput>,
    #[serde(default, alias = "And")]
    and: Option<LifecycleFilterAndInput>,
    #[serde(
        default,
        alias = "ObjectSizeGreaterThan",
        alias = "object_size_greater_than"
    )]
    object_size_greater_than: Option<i64>,
    #[serde(default, alias = "ObjectSizeLessThan", alias = "object_size_less_than")]
    object_size_less_than: Option<i64>,
}

/// S3 `Filter.And` combination of prefix, tags, and object-size bounds.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct LifecycleFilterAndInput {
    #[serde(default, alias = "Prefix")]
    prefix: Option<String>,
    #[serde(default, alias = "Tag")]
    tag: Option<LifecycleTagInput>,
    #[serde(default, alias = "Tags")]
    tags: Option<Vec<LifecycleTagInput>>,
    #[serde(
        default,
        alias = "ObjectSizeGreaterThan",
        alias = "object_size_greater_than"
    )]
    object_size_greater_than: Option<i64>,
    #[serde(default, alias = "ObjectSizeLessThan", alias = "object_size_less_than")]
    object_size_less_than: Option<i64>,
}

/// A single S3 tag predicate.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct LifecycleTagInput {
    #[serde(alias = "Key")]
    key: String,
    #[serde(alias = "Value")]
    value: String,
}

/// S3-shaped `AbortIncompleteMultipartUpload` action.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct AbortIncompleteMultipartUploadInput {
    #[serde(
        default,
        alias = "DaysAfterInitiation",
        alias = "days_after_initiation"
    )]
    days_after_initiation: Option<i32>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct LifecycleExpirationInput {
    #[serde(default, alias = "Days")]
    days: Option<i32>,
    #[serde(default, alias = "Date")]
    date: Option<String>,
    #[serde(
        default,
        alias = "ExpiredObjectAllVersions",
        alias = "expired_object_all_versions"
    )]
    expired_object_all_versions: Option<bool>,
    #[serde(
        default,
        alias = "DelMarkerExpiration",
        alias = "del_marker_expiration"
    )]
    del_marker_expiration: Option<LifecycleDelMarkerInput>,
    #[serde(
        default,
        alias = "ExpiredObjectDeleteMarker",
        alias = "expired_object_delete_marker"
    )]
    expired_object_delete_marker: Option<bool>,
}

#[derive(Debug, Deserialize)]
#[serde(untagged)]
enum LifecycleDelMarkerInput {
    Flag(bool),
    Configuration(LifecycleDelMarkerExpiration),
}

#[derive(Debug)]
struct NormalizedDelMarkerInput {
    enabled: bool,
    configuration: Option<LifecycleDelMarkerExpiration>,
}

impl<'de> Deserialize<'de> for LifecycleRule {
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        let LifecycleRuleInput {
            id,
            status,
            prefix,
            tags,
            object_size_greater_than,
            object_size_less_than,
            filter,
            expiration: expiration_input,
            transition,
            transitions: mut transitions_input,
            noncurrent_version_expiration,
            noncurrent_version_transition,
            noncurrent_version_transitions: mut noncurrent_version_transitions_input,
            abort_incomplete_multipart_upload_days,
            abort_incomplete_multipart_upload,
            expired_object_delete_marker,
            del_marker_expiration: top_level_del_marker_input,
        } = LifecycleRuleInput::deserialize(deserializer)?;

        let filter_fields = resolve_filter_fields(filter).map_err(D::Error::custom)?;
        let prefix = merge_exclusive(prefix, filter_fields.prefix, "prefix", "Filter.Prefix")
            .map_err(D::Error::custom)?;
        let tags = merge_exclusive(tags, filter_fields.tags, "tags", "Filter tags")
            .map_err(D::Error::custom)?;
        let object_size_greater_than = merge_exclusive(
            object_size_greater_than,
            filter_fields.object_size_greater_than,
            "objectSizeGreaterThan",
            "Filter.ObjectSizeGreaterThan",
        )
        .map_err(D::Error::custom)?;
        let object_size_less_than = merge_exclusive(
            object_size_less_than,
            filter_fields.object_size_less_than,
            "objectSizeLessThan",
            "Filter.ObjectSizeLessThan",
        )
        .map_err(D::Error::custom)?;

        let nested_expired_object_delete_marker = expiration_input
            .as_ref()
            .and_then(|expiration| expiration.expired_object_delete_marker);
        let expired_object_delete_marker = merge_equal_optional(
            expired_object_delete_marker,
            nested_expired_object_delete_marker,
            "expiredObjectDeleteMarker",
        )
        .map_err(D::Error::custom)?;

        let abort_incomplete_multipart_upload_days = merge_equal_optional(
            abort_incomplete_multipart_upload_days,
            abort_incomplete_multipart_upload.and_then(|action| action.days_after_initiation),
            "abortIncompleteMultipartUploadDays",
        )
        .map_err(D::Error::custom)?;

        let (expiration, nested_del_marker) = match expiration_input {
            Some(expiration) => {
                let nested_del_marker = expiration.del_marker_expiration;
                (
                    Some(LifecycleExpiration {
                        days: expiration.days,
                        date: expiration.date,
                        expired_object_all_versions: expiration.expired_object_all_versions,
                    }),
                    nested_del_marker,
                )
            }
            None => (None, None),
        };

        let fallback_days = expiration.as_ref().and_then(|expiration| expiration.days);
        let top_level_del_marker =
            normalize_del_marker_input(top_level_del_marker_input, fallback_days)
                .map_err(D::Error::custom)?;
        let nested_del_marker = normalize_del_marker_input(nested_del_marker, fallback_days)
            .map_err(D::Error::custom)?;
        let del_marker_expiration =
            merge_del_marker_inputs(top_level_del_marker, nested_del_marker)
                .map_err(D::Error::custom)?;

        if let Some(transition) = transition {
            transitions_input.insert(0, transition);
        }
        let transition = transitions_input.first().cloned();
        let additional_transitions = transitions_input.into_iter().skip(1).collect();

        if let Some(transition) = noncurrent_version_transition {
            noncurrent_version_transitions_input.insert(0, transition);
        }
        let noncurrent_version_transition = noncurrent_version_transitions_input.first().cloned();
        let additional_noncurrent_version_transitions = noncurrent_version_transitions_input
            .into_iter()
            .skip(1)
            .collect();

        Ok(Self {
            id,
            status,
            prefix,
            tags,
            object_size_greater_than,
            object_size_less_than,
            expiration,
            del_marker_expiration,
            transition,
            transitions: additional_transitions,
            noncurrent_version_expiration,
            noncurrent_version_transition,
            noncurrent_version_transitions: additional_noncurrent_version_transitions,
            abort_incomplete_multipart_upload_days,
            expired_object_delete_marker,
        })
    }
}

/// Filter predicates resolved from an S3-shaped `Filter` object.
#[derive(Default)]
struct FilterFields {
    prefix: Option<String>,
    tags: Option<HashMap<String, String>>,
    object_size_greater_than: Option<i64>,
    object_size_less_than: Option<i64>,
}

/// Flatten an S3 `Filter` (one of `Prefix`, `Tag`, `And`, or a standalone
/// object-size bound) into rc's flat fields.
///
/// An empty `Filter` object stays valid: the server documents it as "applies to
/// every object in the bucket".
fn resolve_filter_fields(
    filter: Option<LifecycleFilterInput>,
) -> std::result::Result<FilterFields, String> {
    let Some(filter) = filter else {
        return Ok(FilterFields::default());
    };
    let predicate_count = usize::from(filter.prefix.is_some())
        + usize::from(filter.tag.is_some())
        + usize::from(filter.and.is_some())
        + usize::from(filter.object_size_greater_than.is_some())
        + usize::from(filter.object_size_less_than.is_some());
    if predicate_count > 1 {
        return Err(
            "S3 Filter allows exactly one of Prefix, Tag, And, ObjectSizeGreaterThan, or ObjectSizeLessThan"
                .to_string(),
        );
    }
    if let Some(and) = filter.and {
        let mut tags = HashMap::new();
        if let Some(tag) = and.tag {
            tags.insert(tag.key, tag.value);
        }
        if let Some(tag_list) = and.tags {
            for tag in tag_list {
                if tags.insert(tag.key.clone(), tag.value).is_some() {
                    let key = tag.key;
                    return Err(format!("duplicate tag key in Filter.And: {key}"));
                }
            }
        }
        return Ok(FilterFields {
            prefix: and.prefix,
            tags: if tags.is_empty() { None } else { Some(tags) },
            object_size_greater_than: and.object_size_greater_than,
            object_size_less_than: and.object_size_less_than,
        });
    }
    if let Some(prefix) = filter.prefix {
        return Ok(FilterFields {
            prefix: Some(prefix),
            ..FilterFields::default()
        });
    }
    if let Some(tag) = filter.tag {
        return Ok(FilterFields {
            tags: Some(HashMap::from([(tag.key, tag.value)])),
            ..FilterFields::default()
        });
    }
    if filter.object_size_greater_than.is_some() || filter.object_size_less_than.is_some() {
        return Ok(FilterFields {
            object_size_greater_than: filter.object_size_greater_than,
            object_size_less_than: filter.object_size_less_than,
            ..FilterFields::default()
        });
    }
    Ok(FilterFields::default())
}

/// Combine a flat field with its nested equivalent; both set at once is ambiguous.
fn merge_exclusive<T>(
    flat: Option<T>,
    nested: Option<T>,
    flat_name: &str,
    nested_name: &str,
) -> std::result::Result<Option<T>, String> {
    match (flat, nested) {
        (Some(_), Some(_)) => Err(format!(
            "lifecycle rule sets both {flat_name} and {nested_name}; specify one"
        )),
        (value, None) | (None, value) => Ok(value),
    }
}

/// Combine two optional spellings of the same value; equal duplicates are fine.
fn merge_equal_optional<T: PartialEq>(
    primary: Option<T>,
    secondary: Option<T>,
    field_name: &str,
) -> std::result::Result<Option<T>, String> {
    match (primary, secondary) {
        (Some(primary_value), Some(secondary_value)) if primary_value != secondary_value => {
            Err(format!("conflicting {field_name} values in lifecycle rule"))
        }
        (value, None) | (None, value) => Ok(value),
        (Some(value), Some(_)) => Ok(Some(value)),
    }
}

fn normalize_del_marker_input(
    input: Option<LifecycleDelMarkerInput>,
    fallback_days: Option<i32>,
) -> std::result::Result<Option<NormalizedDelMarkerInput>, String> {
    match input {
        None => Ok(None),
        Some(LifecycleDelMarkerInput::Flag(false)) => Ok(Some(NormalizedDelMarkerInput {
            enabled: false,
            configuration: None,
        })),
        Some(LifecycleDelMarkerInput::Flag(true)) => fallback_days
            .map(|days| {
                Some(NormalizedDelMarkerInput {
                    enabled: true,
                    configuration: Some(LifecycleDelMarkerExpiration { days: Some(days) }),
                })
            })
            .ok_or_else(|| {
                "DelMarkerExpiration=true requires expiration.days for compatibility input"
                    .to_string()
            }),
        Some(LifecycleDelMarkerInput::Configuration(configuration)) => {
            Ok(Some(NormalizedDelMarkerInput {
                enabled: true,
                configuration: Some(configuration),
            }))
        }
    }
}

fn merge_del_marker_inputs(
    top_level: Option<NormalizedDelMarkerInput>,
    nested: Option<NormalizedDelMarkerInput>,
) -> std::result::Result<Option<LifecycleDelMarkerExpiration>, String> {
    match (top_level, nested) {
        (None, None) => Ok(None),
        (Some(value), None) | (None, Some(value)) => Ok(value.enabled.then(|| {
            value
                .configuration
                .unwrap_or(LifecycleDelMarkerExpiration { days: None })
        })),
        (Some(primary), Some(secondary)) => {
            if primary.enabled != secondary.enabled {
                return Err(
                    "conflicting DelMarkerExpiration values in lifecycle rule: explicit false cannot be combined with an enabled value".to_string(),
                );
            }
            if !primary.enabled {
                return Ok(None);
            }

            let primary_configuration = primary
                .configuration
                .unwrap_or(LifecycleDelMarkerExpiration { days: None });
            let secondary_configuration = secondary
                .configuration
                .unwrap_or(LifecycleDelMarkerExpiration { days: None });
            if primary_configuration.days.is_some()
                && secondary_configuration.days.is_some()
                && primary_configuration.days != secondary_configuration.days
            {
                return Err("conflicting DelMarkerExpiration values in lifecycle rule".to_string());
            }

            Ok(Some(LifecycleDelMarkerExpiration {
                days: primary_configuration.days.or(secondary_configuration.days),
            }))
        }
    }
}

/// Rule status
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
pub enum LifecycleRuleStatus {
    Enabled,
    Disabled,
}

impl fmt::Display for LifecycleRuleStatus {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            LifecycleRuleStatus::Enabled => write!(f, "Enabled"),
            LifecycleRuleStatus::Disabled => write!(f, "Disabled"),
        }
    }
}

impl std::str::FromStr for LifecycleRuleStatus {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s.to_lowercase().as_str() {
            "enabled" => Ok(LifecycleRuleStatus::Enabled),
            "disabled" => Ok(LifecycleRuleStatus::Disabled),
            _ => Err(format!("Invalid lifecycle rule status: {s}")),
        }
    }
}

/// Expiration settings for current object versions
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct LifecycleExpiration {
    /// Number of days after creation to expire
    #[serde(skip_serializing_if = "Option::is_none", alias = "Days")]
    pub days: Option<i32>,

    /// Specific date to expire (ISO 8601 format)
    #[serde(skip_serializing_if = "Option::is_none", alias = "Date")]
    pub date: Option<String>,

    /// Whether all object versions should be expired together.
    #[serde(
        skip_serializing_if = "Option::is_none",
        alias = "ExpiredObjectAllVersions",
        alias = "expired_object_all_versions"
    )]
    pub expired_object_all_versions: Option<bool>,
}

/// Expiration settings for delete markers and their prior object versions.
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct LifecycleDelMarkerExpiration {
    /// Number of days before delete-marker history is removed.
    #[serde(skip_serializing_if = "Option::is_none", alias = "Days")]
    pub days: Option<i32>,
}

/// Transition settings for current object versions
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct LifecycleTransition {
    /// Number of days after creation to transition
    #[serde(skip_serializing_if = "Option::is_none")]
    pub days: Option<i32>,

    /// Specific date to transition (ISO 8601 format)
    #[serde(skip_serializing_if = "Option::is_none")]
    pub date: Option<String>,

    /// Target storage class (tier name)
    pub storage_class: String,
}

/// Expiration settings for noncurrent object versions
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct NoncurrentVersionExpiration {
    /// Number of days after becoming noncurrent to expire
    pub noncurrent_days: i32,

    /// Maximum number of noncurrent versions to retain
    #[serde(skip_serializing_if = "Option::is_none")]
    pub newer_noncurrent_versions: Option<i32>,
}

/// Transition settings for noncurrent object versions
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct NoncurrentVersionTransition {
    /// Number of days after becoming noncurrent to transition
    pub noncurrent_days: i32,

    /// Target storage class (tier name)
    pub storage_class: String,

    /// Maximum number of newer noncurrent versions to retain.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub newer_noncurrent_versions: Option<i32>,
}

impl fmt::Display for LifecycleRule {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{} ({})", self.id, self.status)
    }
}

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

    #[test]
    fn test_lifecycle_rule_status_display() {
        assert_eq!(LifecycleRuleStatus::Enabled.to_string(), "Enabled");
        assert_eq!(LifecycleRuleStatus::Disabled.to_string(), "Disabled");
    }

    #[test]
    fn test_lifecycle_rule_status_from_str() {
        assert_eq!(
            "enabled".parse::<LifecycleRuleStatus>().unwrap(),
            LifecycleRuleStatus::Enabled
        );
        assert_eq!(
            "Disabled".parse::<LifecycleRuleStatus>().unwrap(),
            LifecycleRuleStatus::Disabled
        );
        assert!("invalid".parse::<LifecycleRuleStatus>().is_err());
    }

    #[test]
    fn test_lifecycle_rule_serialization() {
        let rule = LifecycleRule {
            id: "rule-1".to_string(),
            status: LifecycleRuleStatus::Enabled,
            prefix: Some("logs/".to_string()),
            tags: None,
            object_size_greater_than: None,
            object_size_less_than: None,
            expiration: Some(LifecycleExpiration {
                days: Some(30),
                date: None,
                expired_object_all_versions: None,
            }),
            del_marker_expiration: None,
            transition: None,
            transitions: Vec::new(),
            noncurrent_version_expiration: None,
            noncurrent_version_transition: None,
            noncurrent_version_transitions: Vec::new(),
            abort_incomplete_multipart_upload_days: Some(7),
            expired_object_delete_marker: None,
        };

        let json = serde_json::to_string(&rule).unwrap();
        let decoded: LifecycleRule = serde_json::from_str(&json).unwrap();
        assert_eq!(decoded.id, "rule-1");
        assert_eq!(decoded.status, LifecycleRuleStatus::Enabled);
        assert_eq!(decoded.prefix.as_deref(), Some("logs/"));
        assert_eq!(decoded.expiration.as_ref().unwrap().days, Some(30));
        assert_eq!(decoded.abort_incomplete_multipart_upload_days, Some(7));
    }

    #[test]
    fn test_lifecycle_transition_serialization() {
        let transition = LifecycleTransition {
            days: Some(90),
            date: None,
            storage_class: "WARM_TIER".to_string(),
        };

        let json = serde_json::to_string(&transition).unwrap();
        assert!(json.contains("storageClass"));
        assert!(json.contains("WARM_TIER"));

        let decoded: LifecycleTransition = serde_json::from_str(&json).unwrap();
        assert_eq!(decoded.storage_class, "WARM_TIER");
    }

    #[test]
    fn test_lifecycle_configuration_serialization() {
        let config = LifecycleConfiguration {
            rules: vec![LifecycleRule {
                id: "expire-old".to_string(),
                status: LifecycleRuleStatus::Enabled,
                prefix: None,
                tags: None,
                object_size_greater_than: None,
                object_size_less_than: None,
                expiration: Some(LifecycleExpiration {
                    days: Some(365),
                    date: None,
                    expired_object_all_versions: None,
                }),
                del_marker_expiration: None,
                transition: None,
                transitions: Vec::new(),
                noncurrent_version_expiration: Some(NoncurrentVersionExpiration {
                    noncurrent_days: 30,
                    newer_noncurrent_versions: Some(3),
                }),
                noncurrent_version_transition: None,
                noncurrent_version_transitions: Vec::new(),
                abort_incomplete_multipart_upload_days: None,
                expired_object_delete_marker: Some(true),
            }],
        };

        let json = serde_json::to_string_pretty(&config).unwrap();
        let decoded: LifecycleConfiguration = serde_json::from_str(&json).unwrap();
        assert_eq!(decoded.rules.len(), 1);
        assert_eq!(decoded.rules[0].id, "expire-old");
        assert_eq!(
            decoded.rules[0]
                .noncurrent_version_expiration
                .as_ref()
                .unwrap()
                .newer_noncurrent_versions,
            Some(3)
        );
    }

    #[test]
    fn test_noncurrent_version_transition_serialization() {
        let nvt = NoncurrentVersionTransition {
            noncurrent_days: 60,
            storage_class: "COLD_TIER".to_string(),
            newer_noncurrent_versions: None,
        };

        let json = serde_json::to_string(&nvt).unwrap();
        let decoded: NoncurrentVersionTransition = serde_json::from_str(&json).unwrap();
        assert_eq!(decoded.noncurrent_days, 60);
        assert_eq!(decoded.storage_class, "COLD_TIER");
    }

    #[test]
    fn test_lifecycle_extensions_use_canonical_json_shape() {
        let config = LifecycleConfiguration {
            rules: vec![LifecycleRule {
                id: "all-versions".to_string(),
                status: LifecycleRuleStatus::Enabled,
                prefix: Some("test/".to_string()),
                tags: None,
                object_size_greater_than: None,
                object_size_less_than: None,
                expiration: Some(LifecycleExpiration {
                    days: Some(1),
                    date: None,
                    expired_object_all_versions: Some(true),
                }),
                del_marker_expiration: Some(LifecycleDelMarkerExpiration { days: Some(1) }),
                transition: None,
                transitions: Vec::new(),
                noncurrent_version_expiration: None,
                noncurrent_version_transition: None,
                noncurrent_version_transitions: Vec::new(),
                abort_incomplete_multipart_upload_days: None,
                expired_object_delete_marker: None,
            }],
        };

        let value = serde_json::to_value(&config).expect("serialize lifecycle extensions");
        assert_eq!(
            value["rules"][0]["expiration"]["expiredObjectAllVersions"],
            true
        );
        assert_eq!(value["rules"][0]["delMarkerExpiration"]["days"], 1);
        assert!(
            value["rules"][0]["expiration"]
                .get("DelMarkerExpiration")
                .is_none()
        );
        let decoded: LifecycleConfiguration =
            serde_json::from_value(value).expect("canonical lifecycle extensions should parse");
        assert_eq!(
            decoded.rules[0]
                .expiration
                .as_ref()
                .and_then(|expiration| expiration.expired_object_all_versions),
            Some(true)
        );
        assert_eq!(
            decoded.rules[0]
                .del_marker_expiration
                .as_ref()
                .and_then(|expiration| expiration.days),
            Some(1)
        );
    }

    #[test]
    fn test_lifecycle_extensions_accept_issue_6334_compatibility_shape() {
        let input = r#"
        {
          "rules": [{
            "id": "rule-delayed-deletion",
            "status": "Enabled",
            "prefix": "test/",
            "expiration": {
              "ExpiredObjectAllVersions": true,
              "DelMarkerExpiration": true,
              "days": 1
            }
          }]
        }
        "#;

        let config: LifecycleConfiguration =
            serde_json::from_str(input).expect("issue compatibility shape should parse");
        let rule = &config.rules[0];
        assert_eq!(
            rule.expiration
                .as_ref()
                .and_then(|expiration| expiration.expired_object_all_versions),
            Some(true)
        );
        assert_eq!(
            rule.del_marker_expiration
                .as_ref()
                .and_then(|expiration| expiration.days),
            Some(1)
        );
    }

    #[test]
    fn test_lifecycle_extensions_reject_ambiguous_compatibility_shape() {
        let input = r#"
        {
          "rules": [{
            "id": "conflicting",
            "status": "Enabled",
            "expiration": {"days": 1, "DelMarkerExpiration": true},
            "delMarkerExpiration": {"days": 2}
          }]
        }
        "#;

        let result = serde_json::from_str::<LifecycleConfiguration>(input);
        assert!(result.is_err());
    }

    #[test]
    fn test_lifecycle_extensions_reject_explicit_false_conflicts() {
        let inputs = [
            r#"
            {
              "rules": [{
                "id": "conflicting-false-top-level",
                "status": "Enabled",
                "expiration": {"days": 1, "DelMarkerExpiration": true},
                "delMarkerExpiration": false
              }]
            }
            "#,
            r#"
            {
              "rules": [{
                "id": "conflicting-false-nested",
                "status": "Enabled",
                "expiration": {"days": 1, "DelMarkerExpiration": false},
                "delMarkerExpiration": {"days": 1}
              }]
            }
            "#,
        ];

        for input in inputs {
            assert!(
                serde_json::from_str::<LifecycleConfiguration>(input).is_err(),
                "explicit false must not be silently overridden by an enabled representation"
            );
        }

        let explicit_false = r#"
        {
          "rules": [{
            "id": "explicit-false",
            "status": "Enabled",
            "delMarkerExpiration": false
          }]
        }
        "#;
        let config: LifecycleConfiguration =
            serde_json::from_str(explicit_false).expect("standalone false is compatible");
        assert!(config.rules[0].del_marker_expiration.is_none());
    }

    #[test]
    fn test_lifecycle_rule_accepts_additional_actions_and_size_filters() {
        let input = r#"
        {
          "rules": [{
            "id": "full-rule",
            "status": "Enabled",
            "objectSizeGreaterThan": 500,
            "objectSizeLessThan": 64000,
            "transition": {"days": 30, "storageClass": "WARM"},
            "transitions": [{"days": 60, "storageClass": "COLD"}],
            "noncurrentVersionTransition": {
              "noncurrentDays": 90,
              "storageClass": "WARM",
              "newerNoncurrentVersions": 2
            },
            "noncurrentVersionTransitions": [{
              "noncurrentDays": 180,
              "storageClass": "COLD",
              "newerNoncurrentVersions": 1
            }]
          }]
        }
        "#;

        let config: LifecycleConfiguration =
            serde_json::from_str(input).expect("full lifecycle rule should parse");
        let rule = &config.rules[0];
        assert_eq!(rule.object_size_greater_than, Some(500));
        assert_eq!(rule.object_size_less_than, Some(64000));
        assert_eq!(rule.transitions.len(), 1);
        assert_eq!(rule.noncurrent_version_transitions.len(), 1);
        assert_eq!(
            rule.noncurrent_version_transition
                .as_ref()
                .and_then(|transition| transition.newer_noncurrent_versions),
            Some(2)
        );
        assert_eq!(
            rule.noncurrent_version_transitions[0].newer_noncurrent_versions,
            Some(1)
        );

        let serialized =
            serde_json::to_value(&config).expect("full lifecycle rule should serialize");
        let decoded: LifecycleConfiguration =
            serde_json::from_value(serialized).expect("full lifecycle rule should round-trip");
        assert_eq!(decoded.rules[0].transitions.len(), 1);
        assert_eq!(decoded.rules[0].object_size_less_than, Some(64000));
    }
}