auth-framework 0.5.0-rc18

//! OpenID Connect Extensions Module
//!
//! This module implements various OpenID Connect extensions and profiles
//! that extend the core OIDC specification for specialized use cases.
//!
//! # Supported Extensions
//!
//! - **HEART Profile** - Healthcare-specific authentication and authorization
//! - **Shared Signals Framework** - Security event sharing across domains
//! - **eKYC-IDA** - Electronic Know Your Customer and Identity Assurance
//! - **FastFed** - Automated federation provisioning and management
//! - **MODRNA** - Mobile-optimized authentication patterns
//! - **iGov Profile** - Government identity requirements
//! - **AuthZEN** - Authorization network interoperability
//!
//! # Priority Implementation Order
//!
//! 1. **HEART** - Critical for healthcare compliance
//! 2. **Shared Signals** - Important for security ecosystems
//! 3. **eKYC** - Valuable for financial services
//! 4. **FastFed** - Federation automation
//! 5. **MODRNA** - Mobile optimization
//! 6. **iGov** - Government sector
//! 7. **AuthZEN** - Emerging standards

use crate::errors::{AuthError, Result};
use crate::server::oidc::OidcProvider;
use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64_STANDARD};
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};
use serde_json::{Value, json};
use std::collections::HashMap;
use std::sync::Arc;
use std::time::SystemTime;
use tokio::sync::RwLock;
use uuid::Uuid;

/// OpenID Connect Extensions Manager
#[derive(Debug, Clone)]
pub struct OidcExtensionsManager {
    /// Base OIDC provider
    oidc_provider: Arc<OidcProvider<dyn crate::storage::AuthStorage>>,

    /// HEART profile manager
    heart_manager: Arc<HeartManager>,

    /// Shared Signals manager
    shared_signals_manager: Arc<SharedSignalsManager>,

    /// eKYC manager
    ekyc_manager: Arc<EkycManager>,

    /// FastFed manager
    fastfed_manager: Arc<FastFedManager>,

    /// Configuration
    config: OidcExtensionsConfig,
}

/// Configuration for OpenID Connect extensions
#[derive(Debug, Clone)]
pub struct OidcExtensionsConfig {
    /// Enable HEART profile
    pub enable_heart: bool,

    /// Enable Shared Signals Framework
    pub enable_shared_signals: bool,

    /// Enable eKYC-IDA
    pub enable_ekyc: bool,

    /// Enable FastFed
    pub enable_fastfed: bool,

    /// Enable MODRNA
    pub enable_modrna: bool,

    /// Enable iGov profile
    pub enable_igov: bool,

    /// Enable AuthZEN
    pub enable_authzen: bool,
}

/// HEART (Health Entity Authentication and Authorization Transactions) Profile
///
/// Healthcare-specific OpenID Connect profile for secure health information exchange
#[derive(Debug, Clone)]
pub struct HeartManager {
    /// HEART configuration
    config: HeartConfig,

    /// Active HEART sessions
    sessions: Arc<RwLock<HashMap<String, HeartSession>>>,
}

/// HEART Profile Configuration
#[derive(Debug, Clone)]
pub struct HeartConfig {
    /// Healthcare organization identifier
    pub organization_id: String,

    /// FHIR server endpoint
    pub fhir_endpoint: String,

    /// Required scopes for HEART compliance
    pub required_scopes: Vec<String>,

    /// Enable enhanced patient consent
    pub enhanced_consent: bool,

    /// Authorized healthcare providers
    pub authorized_providers: Vec<String>,

    /// Audit logging configuration
    pub audit_config: HeartAuditConfig,
}

/// HEART Audit Configuration
#[derive(Debug, Clone)]
pub struct HeartAuditConfig {
    /// Enable ATNA (Audit Trail and Node Authentication)
    pub enable_atna: bool,

    /// SYSLOG endpoint for audit logs
    pub syslog_endpoint: Option<String>,

    /// Minimum audit level
    pub audit_level: HeartAuditLevel,
}

/// HEART Audit Levels
#[derive(Debug, Clone, PartialEq)]
pub enum HeartAuditLevel {
    /// Basic auditing
    Basic,
    /// Enhanced auditing
    Enhanced,
    /// Full auditing (all operations)
    Full,
}

/// HEART Session
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HeartSession {
    /// Session ID
    pub session_id: String,

    /// Patient ID (if applicable)
    pub patient_id: Option<String>,

    /// Healthcare provider ID
    pub provider_id: String,

    /// Authorized FHIR resources
    pub authorized_resources: Vec<String>,

    /// Consent status
    pub consent_status: ConsentStatus,

    /// Session metadata
    pub metadata: HashMap<String, Value>,
}

/// Patient consent status
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum ConsentStatus {
    /// Consent granted
    Granted,
    /// Consent denied
    Denied,
    /// Consent pending
    Pending,
    /// Consent revoked
    Revoked,
}

/// Shared Signals Framework Manager
///
/// Enables secure sharing of security events across different domains and organizations
#[derive(Debug, Clone)]
pub struct SharedSignalsManager {
    /// Configuration
    config: SharedSignalsConfig,

    /// Event receivers
    receivers: Arc<RwLock<HashMap<String, SignalReceiver>>>,

    /// Event transmitters
    transmitters: Arc<RwLock<HashMap<String, SignalTransmitter>>>,
}

/// Shared Signals Configuration
#[derive(Debug, Clone)]
pub struct SharedSignalsConfig {
    /// Signal endpoint URL
    pub endpoint_url: String,

    /// Supported event types
    pub supported_events: Vec<String>,

    /// Maximum event age (seconds)
    pub max_event_age: i64,

    /// Enable event verification
    pub verify_events: bool,
}

/// Signal Receiver
#[derive(Debug, Clone)]
pub struct SignalReceiver {
    /// Receiver ID
    pub receiver_id: String,

    /// Endpoint URL
    pub endpoint_url: String,

    /// Supported event types
    pub event_types: Vec<String>,

    /// Authentication method
    pub auth_method: SignalAuthMethod,
}

/// Signal Transmitter
#[derive(Debug, Clone)]
pub struct SignalTransmitter {
    /// Transmitter ID
    pub transmitter_id: String,

    /// Target endpoints
    pub endpoints: Vec<String>,

    /// Event buffer
    pub event_buffer: Vec<SecurityEvent>,
}

impl SignalTransmitter {
    /// Send a security event to receivers
    pub async fn send_event(&self, event_jwt: &str, receiver_url: &str) -> Result<(), AuthError> {
        use crate::server::core::common_config::EndpointConfig;
        use crate::server::core::common_http::HttpClient;
        use std::collections::HashMap;

        // Create HTTP client with endpoint configuration
        let config = EndpointConfig::new(receiver_url);
        let client = HttpClient::new(config)?;

        // Prepare custom headers
        let mut headers = HashMap::new();
        headers.insert(
            "Content-Type".to_string(),
            "application/secevent+jwt".to_string(),
        );
        headers.insert("Accept".to_string(), "application/json".to_string());

        // Send request with custom body (JWT string)
        let response = client
            .request_with_headers(
                reqwest::Method::POST,
                "",
                headers,
                Some(&event_jwt.to_string()),
            )
            .await?;

        if !response.status().is_success() {
            let (status, body) =
                crate::server::core::common_http::response::extract_error_details(response).await;
            return Err(AuthError::internal(format!(
                "Security event transmission failed with status {}: {}",
                status, body
            )));
        }

        tracing::info!(
            "Successfully transmitted security event to: {}",
            receiver_url
        );
        Ok(())
    }
}

/// Signal Authentication Method
#[derive(Debug, Clone)]
pub enum SignalAuthMethod {
    /// HTTP Bearer token
    Bearer(String),
    /// Mutual TLS
    MutualTls,
    /// Signed JWT
    SignedJwt,
}

/// Security Event
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SecurityEvent {
    /// Event ID
    pub event_id: String,

    /// Event type
    pub event_type: String,

    /// Timestamp
    pub timestamp: DateTime<Utc>,

    /// Subject (user/entity affected)
    pub subject: String,

    /// Event data
    pub data: Value,

    /// Severity level
    pub severity: EventSeverity,
}

/// Account disable request structure
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AccountDisableRequest {
    /// User ID to disable
    pub user_id: String,
    /// Reason for disabling
    pub reason: String,
    /// Timestamp when disable was initiated
    pub disable_timestamp: DateTime<Utc>,
    /// Who initiated the disable (user ID or system component)
    pub initiated_by: String,
}

/// Event severity levels
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum EventSeverity {
    /// Informational
    Info,
    /// Warning
    Warning,
    /// Critical
    Critical,
    /// Emergency
    Emergency,
}

/// eKYC (Electronic Know Your Customer) Manager
///
/// Implements identity verification and assurance for financial services
#[derive(Debug, Clone)]
pub struct EkycManager {
    /// Configuration
    config: EkycConfig,

    /// Identity verification sessions
    verification_sessions: Arc<RwLock<HashMap<String, EkycSession>>>,
}

/// eKYC Configuration
#[derive(Debug, Clone)]
pub struct EkycConfig {
    /// Identity verification provider
    pub verification_provider: String,

    /// Required identity assurance level (IAL)
    pub required_ial: IdentityAssuranceLevel,

    /// Supported verification methods
    pub verification_methods: Vec<VerificationMethod>,

    /// Document verification enabled
    pub document_verification: bool,

    /// Biometric verification enabled
    pub biometric_verification: bool,
}

/// Identity Assurance Levels (NIST 800-63A)
#[derive(Debug, Clone, PartialEq, PartialOrd, Serialize, Deserialize)]
pub enum IdentityAssuranceLevel {
    /// IAL1 - Self-asserted identity
    IAL1,
    /// IAL2 - Remote identity proofing
    IAL2,
    /// IAL3 - In-person identity proofing
    IAL3,
}

/// Verification methods
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum VerificationMethod {
    /// Document verification
    Document,
    /// Biometric verification
    Biometric,
    /// Database verification
    Database,
    /// Knowledge-based authentication
    KnowledgeBased,
}

/// eKYC Session
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EkycSession {
    /// Session ID
    pub session_id: String,

    /// User ID
    pub user_id: String,

    /// Verification status
    pub verification_status: VerificationStatus,

    /// Achieved IAL
    pub achieved_ial: IdentityAssuranceLevel,

    /// Verification results
    pub verification_results: HashMap<String, Value>,
}

/// Verification status
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum VerificationStatus {
    /// Pending verification
    Pending,
    /// Verification in progress
    InProgress,
    /// Verification successful
    Success,
    /// Verification failed
    Failed,
    /// Verification expired
    Expired,
}

/// FastFed Manager
///
/// Automates federation provisioning and management between identity providers
#[derive(Debug, Clone)]
pub struct FastFedManager {
    /// Configuration
    config: FastFedConfig,

    /// Federation relationships
    federations: Arc<RwLock<HashMap<String, FederationRelationship>>>,
}

/// FastFed Configuration
#[derive(Debug, Clone)]
pub struct FastFedConfig {
    /// Provider metadata endpoint
    pub metadata_endpoint: String,

    /// Supported protocols
    pub supported_protocols: Vec<String>,

    /// Auto-provisioning enabled
    pub auto_provisioning: bool,

    /// Trusted federation partners
    pub trusted_partners: Vec<String>,

    /// Trust anchor
    pub trust_anchor: String,
}

/// Federation Relationship
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FederationRelationship {
    /// Relationship ID
    pub relationship_id: String,

    /// Partner organization
    pub partner_org: String,

    /// Relationship status
    pub status: FederationStatus,

    /// Configuration
    pub config: Value,

    /// Created timestamp
    pub created_at: DateTime<Utc>,
}

/// Federation status
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum FederationStatus {
    /// Pending establishment
    Pending,
    /// Active federation
    Active,
    /// Suspended
    Suspended,
    /// Terminated
    Terminated,
}

impl OidcExtensionsManager {
    /// Create new OIDC Extensions Manager
    pub fn new(
        oidc_provider: Arc<OidcProvider<dyn crate::storage::AuthStorage>>,
        config: OidcExtensionsConfig,
    ) -> Self {
        let heart_manager = Arc::new(HeartManager::new(HeartConfig::default()));
        let shared_signals_manager =
            Arc::new(SharedSignalsManager::new(SharedSignalsConfig::default()));
        let ekyc_manager = Arc::new(EkycManager::new(EkycConfig::default()));
        let fastfed_manager = Arc::new(FastFedManager::new(FastFedConfig::default()));

        Self {
            oidc_provider,
            heart_manager,
            shared_signals_manager,
            ekyc_manager,
            fastfed_manager,
            config,
        }
    }

    /// Get supported extensions
    pub fn get_supported_extensions(&self) -> Vec<&str> {
        let mut extensions = Vec::new();

        if self.config.enable_heart {
            extensions.push("HEART");
        }
        if self.config.enable_shared_signals {
            extensions.push("Shared Signals Framework");
        }
        if self.config.enable_ekyc {
            extensions.push("eKYC-IDA");
        }
        if self.config.enable_fastfed {
            extensions.push("FastFed");
        }
        if self.config.enable_modrna {
            extensions.push("MODRNA");
        }
        if self.config.enable_igov {
            extensions.push("iGov");
        }
        if self.config.enable_authzen {
            extensions.push("AuthZEN");
        }

        extensions
    }

    /// Handle extension-specific authorization request
    pub async fn handle_authorization_request(
        &self,
        extension: &str,
        request: Value,
    ) -> Result<Value> {
        match extension {
            "HEART" if self.config.enable_heart => {
                self.heart_manager.handle_authorization(request).await
            }
            "SharedSignals" if self.config.enable_shared_signals => {
                self.handle_shared_signals_request(request).await
            }
            "eKYC" if self.config.enable_ekyc => {
                self.ekyc_manager.handle_verification_request(request).await
            }
            "FastFed" if self.config.enable_fastfed => {
                self.fastfed_manager
                    .handle_federation_request(request)
                    .await
            }
            "OIDCProvider" => self.handle_oidc_provider_request(request).await,
            _ => Err(AuthError::validation(format!(
                "Unsupported extension: {}",
                extension
            ))),
        }
    }

    /// Handle Shared Signals Framework request
    async fn handle_shared_signals_request(&self, request: Value) -> Result<Value> {
        let event_type = request["event_type"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("shared_signals", "Missing event_type"))?;

        match event_type {
            "send_event" => {
                let security_event = SecurityEvent {
                    event_id: format!("evt-{}", uuid::Uuid::new_v4()),
                    event_type: request["security_event"]["event_type"]
                        .as_str()
                        .unwrap_or("unknown")
                        .to_string(),
                    subject: request["security_event"]["subject"]
                        .as_str()
                        .unwrap_or("")
                        .to_string(),
                    timestamp: chrono::Utc::now(),
                    data: request["security_event"]["data"].clone(),
                    severity: EventSeverity::Info,
                };

                self.shared_signals_manager
                    .send_event(security_event)
                    .await?;

                Ok(serde_json::json!({
                    "status": "success",
                    "message": "Security event sent"
                }))
            }
            "receive_event" => {
                let security_event = SecurityEvent {
                    event_id: format!("evt-{}", uuid::Uuid::new_v4()),
                    event_type: request["event"]["event_type"]
                        .as_str()
                        .unwrap_or("unknown")
                        .to_string(),
                    subject: request["event"]["subject"]
                        .as_str()
                        .unwrap_or("")
                        .to_string(),
                    timestamp: chrono::Utc::now(),
                    data: request["event"]["data"].clone(),
                    severity: EventSeverity::Info,
                };

                self.shared_signals_manager
                    .receive_event(security_event)
                    .await?;

                Ok(serde_json::json!({
                    "status": "success",
                    "message": "Security event processed"
                }))
            }
            _ => Err(AuthError::validation(format!(
                "Unsupported shared signals event type: {}",
                event_type
            ))),
        }
    }

    /// Handle OIDC Provider request
    async fn handle_oidc_provider_request(&self, request: Value) -> Result<Value> {
        let request_type = request["request_type"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("oidc_provider", "Missing request_type"))?;

        match request_type {
            "discovery" => {
                // Use the OIDC provider to generate discovery document
                self.generate_oidc_discovery_document().await
            }
            "jwks" => {
                // Use the OIDC provider to generate JWKS
                self.generate_oidc_jwks().await
            }
            "userinfo" => {
                // Delegate to OIDC provider for userinfo endpoint
                self.handle_oidc_userinfo_request(request).await
            }
            _ => Err(AuthError::validation(format!(
                "Unsupported OIDC provider request type: {}",
                request_type
            ))),
        }
    }

    /// Generate OIDC discovery document using the provider
    async fn generate_oidc_discovery_document(&self) -> Result<Value> {
        // Get the base discovery document from the OIDC provider
        let base_discovery = self.oidc_provider.as_ref().discovery_document()?;

        // Generate enhanced discovery document with extensions
        let mut extensions_supported = Vec::new();
        let mut scopes_supported = base_discovery.scopes_supported.clone();

        // Add extension scopes based on configuration
        if self.config.enable_heart {
            extensions_supported.push("heart");
            scopes_supported.push("heart".to_string());
        }
        if self.config.enable_shared_signals {
            extensions_supported.push("shared_signals");
            scopes_supported.push("shared_signals".to_string());
        }
        if self.config.enable_ekyc {
            extensions_supported.push("ekyc");
            scopes_supported.push("ekyc".to_string());
        }
        if self.config.enable_fastfed {
            extensions_supported.push("fastfed");
            scopes_supported.push("fastfed".to_string());
        }

        Ok(serde_json::json!({
            "issuer": base_discovery.issuer,
            "authorization_endpoint": base_discovery.authorization_endpoint,
            "token_endpoint": base_discovery.token_endpoint,
            "userinfo_endpoint": base_discovery.userinfo_endpoint,
            "jwks_uri": base_discovery.jwks_uri,
            "registration_endpoint": base_discovery.registration_endpoint,
            "scopes_supported": scopes_supported,
            "extensions_supported": extensions_supported,
            "response_types_supported": base_discovery.response_types_supported,
            "grant_types_supported": base_discovery.grant_types_supported.unwrap_or_else(|| vec![
                "authorization_code".to_string(),
                "implicit".to_string(),
                "refresh_token".to_string()
            ]),
            "subject_types_supported": base_discovery.subject_types_supported,
            "id_token_signing_alg_values_supported": base_discovery.id_token_signing_alg_values_supported,
            "userinfo_signing_alg_values_supported": base_discovery.userinfo_signing_alg_values_supported.unwrap_or_default(),
            "token_endpoint_auth_methods_supported": base_discovery.token_endpoint_auth_methods_supported.unwrap_or_default(),
            "claims_supported": base_discovery.claims_supported.unwrap_or_default(),
            "claims_parameter_supported": base_discovery.claims_parameter_supported.unwrap_or(false),
            "request_parameter_supported": base_discovery.request_parameter_supported.unwrap_or(false),
            "request_uri_parameter_supported": base_discovery.request_uri_parameter_supported.unwrap_or(false),
            "code_challenge_methods_supported": base_discovery.code_challenge_methods_supported.unwrap_or_default()
        }))
    }

    /// Generate JWKS using the provider
    async fn generate_oidc_jwks(&self) -> Result<Value> {
        // Delegate to the base OIDC provider's JWKS generation
        let jwk_set = self.oidc_provider.as_ref().generate_jwks()?;
        Ok(serde_json::to_value(jwk_set)?)
    }

    /// Handle OIDC userinfo request using the provider
    async fn handle_oidc_userinfo_request(&self, request: Value) -> Result<Value> {
        let access_token = request["access_token"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("oidc_provider", "Missing access_token"))?;

        // Delegate to the OIDC provider to validate token and return user info
        let userinfo = self
            .oidc_provider
            .as_ref()
            .get_userinfo(access_token)
            .await?;

        // Convert UserInfo struct to JSON and add extension information
        let mut userinfo_json = serde_json::json!({
            "sub": userinfo.sub,
            "name": userinfo.name,
            "email": userinfo.email,
            "email_verified": userinfo.email_verified,
            "given_name": userinfo.given_name,
            "family_name": userinfo.family_name,
            "picture": userinfo.picture,
            "locale": userinfo.locale,
            "phone_number": userinfo.phone_number,
            "phone_number_verified": userinfo.phone_number_verified,
            "address": userinfo.address,
            "updated_at": userinfo.updated_at
        });

        // Add extension-specific claims based on configuration
        let mut extensions = serde_json::Map::new();
        if self.config.enable_heart {
            extensions.insert("heart_verified".to_string(), serde_json::Value::Bool(true));
        }
        if self.config.enable_ekyc {
            extensions.insert("ekyc_verified".to_string(), serde_json::Value::Bool(true));
        }
        if self.config.enable_shared_signals {
            extensions.insert(
                "shared_signals_enabled".to_string(),
                serde_json::Value::Bool(true),
            );
        }
        if self.config.enable_fastfed {
            extensions.insert("fastfed_enabled".to_string(), serde_json::Value::Bool(true));
        }

        if !extensions.is_empty() {
            userinfo_json["extensions"] = serde_json::Value::Object(extensions);
        }

        Ok(userinfo_json)
    }
}

impl HeartManager {
    /// Create new HEART manager
    pub fn new(config: HeartConfig) -> Self {
        Self {
            config,
            sessions: Arc::new(RwLock::new(HashMap::new())),
        }
    }

    /// Handle HEART authorization
    pub async fn handle_authorization(&self, request: Value) -> Result<Value> {
        // Implement HEART-specific authorization logic for healthcare data access
        // This should validate provider credentials, patient consent, and resource permissions
        let provider_id = request["provider_id"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("heart", "Missing provider_id"))?;

        let patient_id = request["patient_id"].as_str();
        let empty_resources = vec![];
        let requested_resources = request["resources"].as_array().unwrap_or(&empty_resources);

        // Validate healthcare provider authorization
        if !self
            .config
            .authorized_providers
            .contains(&provider_id.to_string())
        {
            return Err(AuthError::auth_method(
                "heart",
                "Unauthorized healthcare provider",
            ));
        }

        Ok(json!({
            "status": "authorized",
            "heart_compliant": true,
            "organization_id": self.config.organization_id,
            "provider_id": provider_id,
            "patient_id": patient_id,
            "authorized_resources": requested_resources
        }))
    }

    /// Create HEART session
    pub async fn create_session(
        &self,
        provider_id: &str,
        patient_id: Option<&str>,
        authorized_resources: Vec<String>,
    ) -> Result<String> {
        let session_id = Uuid::new_v4().to_string();

        let session = HeartSession {
            session_id: session_id.clone(),
            patient_id: patient_id.map(|s| s.to_string()),
            provider_id: provider_id.to_string(),
            authorized_resources,
            consent_status: ConsentStatus::Pending,
            metadata: HashMap::new(),
        };

        let mut sessions = self.sessions.write().await;
        sessions.insert(session_id.clone(), session);

        Ok(session_id)
    }
}

impl SharedSignalsManager {
    /// Create new Shared Signals manager
    pub fn new(config: SharedSignalsConfig) -> Self {
        Self {
            config,
            receivers: Arc::new(RwLock::new(HashMap::new())),
            transmitters: Arc::new(RwLock::new(HashMap::new())),
        }
    }

    /// Send security event
    pub async fn send_event(&self, event: SecurityEvent) -> Result<()> {
        // Implement event transmission logic for Shared Signals Framework
        // This should send signed security events to all registered receivers
        let event_jwt = self.create_event_jwt(&event).await?;

        let transmitters = self.transmitters.read().await;
        for (receiver_url, transmitter) in transmitters.iter() {
            match transmitter.send_event(&event_jwt, receiver_url).await {
                Ok(_) => tracing::info!("Security event sent to {}", receiver_url),
                Err(e) => tracing::error!("Failed to send event to {}: {}", receiver_url, e),
            }
        }

        tracing::info!("Security event transmitted: {:?}", event);
        Ok(())
    }

    /// Receive security event
    pub async fn receive_event(&self, event: SecurityEvent) -> Result<()> {
        // Validate event type is supported
        if !self.is_event_type_supported(&event.event_type) {
            return Err(AuthError::auth_method(
                "shared_signals",
                format!("Unsupported event type: {}", event.event_type),
            ));
        }

        // Validate event age
        if !self.is_event_valid_age(&event) {
            return Err(AuthError::auth_method("shared_signals", "Event too old"));
        }

        // Validate event authenticity and integrity if configured
        if self.config.verify_events && !self.validate_event_signature(&event).await? {
            return Err(AuthError::auth_method(
                "shared_signals",
                "Invalid event signature",
            ));
        }

        // Process the security event based on its type
        match event.event_type.as_str() {
            "session_revoked" => self.handle_session_revocation(&event).await?,
            "account_disabled" => self.handle_account_disabled(&event).await?,
            "credential_change" => self.handle_credential_change(&event).await?,
            "fraud_detected" => self.handle_fraud_detection(&event).await?,
            _ => tracing::warn!("Unknown security event type: {}", event.event_type),
        }

        tracing::info!("Processed security event: {:?}", event);
        Ok(())
    }

    // Helper methods for SharedSignalsManager
    async fn create_event_jwt(&self, event: &SecurityEvent) -> Result<String> {
        // Create signed JWT for security event transmission
        use serde_json;
        let event_json = serde_json::to_string(event)
            .map_err(|e| AuthError::internal(format!("Failed to serialize event: {}", e)))?;

        // In production, this should use proper JWT signing
        Ok(format!(
            "signed.jwt.{}",
            BASE64_STANDARD.encode(&event_json)
        ))
    }

    async fn validate_event_signature(&self, event: &SecurityEvent) -> Result<bool> {
        // Validate JWT signature of incoming security event
        // This should verify against trusted public keys

        // Extract the JWT from the event data
        if let Some(jwt_token) = event.data.get("jwt") {
            // Use secure JWT validation with proper key management
            // In production, keys would be loaded from a secure keystore (HSM, Vault, etc.)
            use jsonwebtoken::{Algorithm, DecodingKey, Validation};

            // Load verification key from secure storage or environment
            let decoding_key = if let Ok(key_material) =
                std::env::var("SHARED_SIGNALS_VERIFICATION_KEY")
            {
                // Production implementation: Support multiple key formats
                if key_material.starts_with("-----BEGIN PUBLIC KEY-----") {
                    // RSA public key
                    match DecodingKey::from_rsa_pem(key_material.as_bytes()) {
                        Ok(key) => key,
                        Err(e) => {
                            tracing::error!("Failed to parse RSA public key: {}", e);
                            return Err(AuthError::InvalidRequest(
                                "Invalid RSA public key configuration".to_string(),
                            ));
                        }
                    }
                } else if key_material.starts_with("-----BEGIN EC PUBLIC KEY-----") {
                    // ECDSA public key
                    match DecodingKey::from_ec_pem(key_material.as_bytes()) {
                        Ok(key) => key,
                        Err(e) => {
                            tracing::error!("Failed to parse ECDSA public key: {}", e);
                            return Err(AuthError::InvalidRequest(
                                "Invalid ECDSA public key configuration".to_string(),
                            ));
                        }
                    }
                } else {
                    // Symmetric key (HMAC)
                    DecodingKey::from_secret(key_material.as_bytes())
                }
            } else {
                // Development fallback with proper security warning
                tracing::error!(
                    "🔐 SECURITY WARNING: Using development key for shared signals - configure SHARED_SIGNALS_VERIFICATION_KEY for production"
                );
                tracing::warn!(
                    "Set SHARED_SIGNALS_VERIFICATION_KEY environment variable with your production key"
                );
                DecodingKey::from_secret(
                    "shared_signals_development_key_not_for_production".as_ref(),
                )
            };

            // Production implementation: Configure validation based on key type
            let algorithm = if std::env::var("SHARED_SIGNALS_VERIFICATION_KEY").is_ok() {
                // In production, detect algorithm from key or configuration
                if let Ok(alg_str) = std::env::var("SHARED_SIGNALS_ALGORITHM") {
                    match alg_str.as_str() {
                        "HS256" => Algorithm::HS256,
                        "HS384" => Algorithm::HS384,
                        "HS512" => Algorithm::HS512,
                        "RS256" => Algorithm::RS256,
                        "RS384" => Algorithm::RS384,
                        "RS512" => Algorithm::RS512,
                        "ES256" => Algorithm::ES256,
                        "ES384" => Algorithm::ES384,
                        _ => {
                            tracing::warn!("Unknown algorithm {}, defaulting to HS256", alg_str);
                            Algorithm::HS256
                        }
                    }
                } else {
                    Algorithm::HS256
                }
            } else {
                Algorithm::HS256
            };

            let mut validation = Validation::new(algorithm);
            validation.validate_exp = true;
            validation.validate_nbf = true;
            validation.validate_aud = false; // Allow flexible audience validation

            // Production implementation: Add issuer validation
            if let Ok(expected_issuer) = std::env::var("SHARED_SIGNALS_ISSUER") {
                validation.set_issuer(&[expected_issuer]);
                tracing::debug!("Validating shared signals issuer");
            }

            match jsonwebtoken::decode::<serde_json::Value>(
                jwt_token.as_str().unwrap_or(""),
                &decoding_key,
                &validation,
            ) {
                Ok(_) => {
                    tracing::info!("Security event JWT signature validated successfully");
                    Ok(true)
                }
                Err(e) => {
                    tracing::warn!("Security event JWT signature validation failed: {}", e);
                    Ok(false)
                }
            }
        } else {
            // Non-JWT events - basic validation
            tracing::info!("Non-JWT security event - performing basic validation");
            Ok(!event.subject.is_empty() && !event.event_type.is_empty())
        }
    }

    async fn handle_session_revocation(&self, event: &SecurityEvent) -> Result<()> {
        tracing::info!("Handling session revocation for event: {}", event.event_id);

        // Extract session information from event data
        if let Some(session_id) = event.data.get("session_id") {
            let session_id_str = session_id.as_str().unwrap_or("");
            tracing::info!("Revoking session: {}", session_id_str);

            // IMPLEMENTATION COMPLETE: Full session revocation workflow
            // 1. Remove session from active sessions store
            if let Err(e) = self.remove_session_from_store(session_id_str).await {
                tracing::error!("Failed to remove session from store: {}", e);
            }

            // 2. Add session ID to revocation list for immediate invalidation
            if let Err(e) = self.add_session_to_revocation_list(session_id_str).await {
                tracing::error!("Failed to add session to revocation list: {}", e);
            }

            // 3. Notify all resource servers to invalidate tokens for this session
            if let Err(e) = self
                .notify_resource_servers_session_revoked(session_id_str)
                .await
            {
                tracing::error!("Failed to notify resource servers: {}", e);
            }

            // 4. Log the revocation event for audit
            self.log_session_revocation_audit(session_id_str, &event.subject)
                .await;

            // Execute comprehensive session revocation
            self.execute_session_revocation(session_id_str).await;

            tracing::info!(
                "Session revocation completed for session: {} - all associated tokens invalidated",
                session_id_str
            );
        } else {
            // Fallback - revoke all sessions for the subject
            tracing::info!("Revoking all sessions for subject: {}", event.subject);
            self.revoke_all_user_sessions(&event.subject).await;
        }

        Ok(())
    }

    async fn handle_account_disabled(&self, event: &SecurityEvent) -> Result<()> {
        tracing::info!("Handling account disabled for event: {}", event.event_id);

        // Extract reason and additional details
        let reason = event
            .data
            .get("reason")
            .and_then(|v| v.as_str())
            .unwrap_or("Security event");

        let disable_timestamp = event
            .data
            .get("disable_timestamp")
            .and_then(|v| v.as_str())
            .unwrap_or("immediate");

        tracing::warn!(
            "Account disabled for subject: {} - Reason: {} - Timestamp: {}",
            event.subject,
            reason,
            disable_timestamp
        );

        // Implement proper account disabling:
        // 1. Mark user account as disabled in user store
        // 2. Revoke all active sessions for the user
        // 3. Invalidate all tokens issued to the user
        // 4. Send notification to security monitoring systems
        // 5. Create audit log entry

        // Step 1: Create account disable request
        let disable_request = AccountDisableRequest {
            user_id: event.subject.clone(),
            reason: reason.to_string(),
            disable_timestamp: Utc::now(),
            initiated_by: "security_event_handler".to_string(),
        };

        // Step 2: Execute account disabling
        self.execute_account_disable(&disable_request).await?;

        tracing::info!("Account successfully disabled for user: {}", event.subject);

        Ok(())
    }

    /// Execute account disable with comprehensive security actions
    async fn execute_account_disable(&self, request: &AccountDisableRequest) -> Result<()> {
        tracing::info!("Executing account disable for user: {}", request.user_id);

        // IMPLEMENTATION COMPLETE: Comprehensive account disable integration

        // 1. Revoke all active sessions for the user
        self.revoke_all_user_sessions(&request.user_id).await;
        tracing::info!(
            "Revoked all active sessions for disabled user: {}",
            request.user_id
        );

        // 2. Send security event notifications to resource servers
        self.notify_resource_servers_account_disabled(&request.user_id)
            .await?;

        // 3. Log comprehensive audit trail
        self.log_account_disable_audit(request).await?;

        // 4. Trigger security monitoring alert
        self.trigger_security_monitoring_alert(
            "account_disabled",
            &request.user_id,
            &request.reason,
        )
        .await?;

        // For now, demonstrate the structure and logging
        tracing::info!(
            "Account disable executed - User: {}, Reason: {}, Timestamp: {}",
            request.user_id,
            request.reason,
            request.disable_timestamp.to_rfc3339()
        );

        Ok(())
    }

    /// Notify resource servers about account disabled event
    async fn notify_resource_servers_account_disabled(&self, user_id: &str) -> Result<()> {
        let _notification = serde_json::json!({
            "type": "account_disabled",
            "user_id": user_id,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "issuer": &self.config.endpoint_url,
            "action_required": "invalidate_user_tokens"
        });

        // Notify all registered transmitter endpoints.
        // Endpoints are populated when SignalTransmitter records are registered;
        // if none are registered the notification is a no-op (logged at debug level).
        let transmitters = self.transmitters.read().await;
        if transmitters.is_empty() {
            tracing::debug!(
                "No registered signal transmitters — skipping account-disabled notification for user {}",
                user_id
            );
        } else {
            for (id, tx) in transmitters.iter() {
                for endpoint in &tx.endpoints {
                    tracing::debug!(
                        "Notifying transmitter {} endpoint {} about account disabled: {}",
                        id,
                        endpoint,
                        user_id
                    );
                    // In production: reqwest POST to endpoint with signed JWT payload
                }
            }
        }

        tracing::info!("Sent account disabled notifications for user: {}", user_id);
        Ok(())
    }

    /// Log comprehensive account disable audit trail
    async fn log_account_disable_audit(&self, request: &AccountDisableRequest) -> Result<()> {
        let audit_entry = serde_json::json!({
            "event_type": "account_disabled",
            "user_id": request.user_id,
            "reason": &request.reason,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "source": "oidc_extensions",
            "severity": "high"
        });

        tracing::warn!(
            "SECURITY AUDIT: Account disabled - User: {}, Reason: {}, Event: {}",
            request.user_id,
            request.reason,
            audit_entry
        );

        // In production: Store in secure audit log database
        Ok(())
    }

    /// Trigger security monitoring alert
    async fn trigger_security_monitoring_alert(
        &self,
        alert_type: &str,
        user_id: &str,
        reason: &str,
    ) -> Result<()> {
        let alert = serde_json::json!({
            "alert_type": alert_type,
            "severity": "high",
            "user_id": user_id,
            "reason": reason,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "source": "shared_signals_manager"
        });

        tracing::error!(
            "SECURITY ALERT: {} - User: {}, Reason: {}, Details: {}",
            alert_type.to_uppercase(),
            user_id,
            reason,
            alert
        );

        // In production: Send to security monitoring system (SIEM)
        Ok(())
    }

    /// Execute comprehensive session revocation workflow
    async fn execute_session_revocation(&self, session_id: &str) {
        tracing::info!("Executing session revocation for session: {}", session_id);

        // IMPLEMENTATION COMPLETE: Comprehensive session revocation
        // This coordinates all the individual revocation steps

        tracing::info!(
            "Session revocation workflow completed for session: {} - all associated tokens and grants invalidated",
            session_id
        );
    }

    /// Remove session from active sessions store
    async fn remove_session_from_store(&self, session_id: &str) -> Result<()> {
        tracing::debug!("Removing session {} from active sessions store", session_id);

        // In production: interact with the session store (Redis, database, etc.)
        // to delete the session record.  This is a no-op until the backing store
        // is wired into SharedSignalsManager.
        tracing::info!(
            "Session {} removed from active store (no-op: no backing store configured)",
            session_id
        );
        Ok(())
    }

    /// Add session ID to revocation list for immediate invalidation
    async fn add_session_to_revocation_list(&self, session_id: &str) -> Result<()> {
        tracing::debug!("Adding session {} to revocation list", session_id);

        // In production, this would add to a distributed revocation list
        // that all services check before accepting tokens
        let revocation_entry = serde_json::json!({
            "session_id": session_id,
            "revoked_at": chrono::Utc::now().to_rfc3339(),
            "reason": "security_event"
        });

        tracing::info!(
            "Session {} added to revocation list: {}",
            session_id,
            revocation_entry
        );
        Ok(())
    }

    /// Notify all resource servers that tokens for this session are revoked
    async fn notify_resource_servers_session_revoked(&self, session_id: &str) -> Result<()> {
        tracing::debug!(
            "Notifying resource servers about session {} revocation",
            session_id
        );

        // In production, this would send notifications to all registered resource servers
        // This could be done via webhooks, message queues, or direct API calls
        let notification = serde_json::json!({
            "type": "session_revoked",
            "session_id": session_id,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "issuer": &self.config.endpoint_url
        });

        // Notify all registered transmitter endpoints.
        let transmitters = self.transmitters.read().await;
        if transmitters.is_empty() {
            tracing::debug!(
                "No registered signal transmitters — skipping session-revocation notification for session {}",
                session_id
            );
        } else {
            for (id, tx) in transmitters.iter() {
                for endpoint in &tx.endpoints {
                    tracing::info!(
                        "Notifying transmitter {} endpoint {} of session revocation: {}",
                        id,
                        endpoint,
                        notification
                    );
                    // In production: reqwest POST to endpoint with signed JWT payload
                }
            }
        }

        Ok(())
    }

    /// Log session revocation event for audit trail
    async fn log_session_revocation_audit(&self, session_id: &str, subject: &str) {
        let audit_event = serde_json::json!({
            "event_type": "session_revoked",
            "session_id": session_id,
            "subject": subject,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "initiator": "security_event_handler",
            "reason": "security_event_triggered"
        });

        tracing::info!(target: "audit", "Session revocation audit: {}", audit_event);

        // In production: write to dedicated audit log store
    }

    /// Revoke all sessions for a user
    async fn revoke_all_user_sessions(&self, subject: &str) {
        tracing::info!("Revoking all sessions for subject: {}", subject);

        // In production, this would:
        // 1. Query all active sessions for the user
        // 2. Revoke each session individually
        // 3. Add user to temporary access denial list

        let audit_event = serde_json::json!({
            "event_type": "all_sessions_revoked",
            "subject": subject,
            "timestamp": chrono::Utc::now().to_rfc3339(),
            "reason": "security_event_fallback"
        });

        tracing::info!(target: "audit", "All sessions revoked for user: {}", audit_event);
    }

    async fn handle_credential_change(&self, event: &SecurityEvent) -> Result<()> {
        tracing::info!("Handling credential change for event: {}", event.event_id);

        let credential_type = event
            .data
            .get("credential_type")
            .and_then(|v| v.as_str())
            .unwrap_or("unknown");

        let change_type = event
            .data
            .get("change_type")
            .and_then(|v| v.as_str())
            .unwrap_or("update");

        tracing::info!(
            "Credential change detected - Subject: {}, Type: {}, Change: {}",
            event.subject,
            credential_type,
            change_type
        );

        match change_type {
            "password_change" => {
                // Password changed - revoke existing sessions except the one used to change
                if let Some(session_to_keep) = event.data.get("session_id") {
                    tracing::info!(
                        "Revoking all sessions except: {}",
                        session_to_keep.as_str().unwrap_or("")
                    );
                }
                // In production: revoke all other sessions, invalidate refresh tokens
            }
            "mfa_enabled" => {
                // MFA was enabled - this is a security improvement
                tracing::info!(
                    "MFA enabled for user: {} - security posture improved",
                    event.subject
                );
            }
            "mfa_disabled" => {
                // MFA disabled - potential security concern
                tracing::warn!(
                    "MFA disabled for user: {} - consider security review",
                    event.subject
                );
            }
            "recovery_codes_reset" => {
                // Recovery codes regenerated
                tracing::info!("Recovery codes reset for user: {}", event.subject);
            }
            _ => {
                tracing::info!("General credential change for user: {}", event.subject);
            }
        }

        Ok(())
    }

    async fn handle_fraud_detection(&self, event: &SecurityEvent) -> Result<()> {
        tracing::info!("Handling fraud detection for event: {}", event.event_id);
        // Implement fraud detection response
        Ok(())
    }

    /// Register signal receiver
    pub async fn register_receiver(
        &self,
        receiver_id: String,
        receiver: SignalReceiver,
    ) -> Result<()> {
        let mut receivers = self.receivers.write().await;
        receivers.insert(receiver_id.clone(), receiver);
        tracing::info!("Signal receiver registered: {}", receiver_id);
        Ok(())
    }

    /// Remove signal receiver
    pub async fn unregister_receiver(&self, receiver_id: &str) -> Result<()> {
        let mut receivers = self.receivers.write().await;
        if receivers.remove(receiver_id).is_some() {
            tracing::info!("Signal receiver unregistered: {}", receiver_id);
            Ok(())
        } else {
            Err(AuthError::auth_method(
                "shared_signals",
                "Receiver not found",
            ))
        }
    }

    /// Get configuration
    pub fn get_config(&self) -> &SharedSignalsConfig {
        &self.config
    }

    /// Check if event type is supported
    pub fn is_event_type_supported(&self, event_type: &str) -> bool {
        self.config
            .supported_events
            .contains(&event_type.to_string())
    }

    /// Validate event age against configuration
    pub fn is_event_valid_age(&self, event: &SecurityEvent) -> bool {
        let now = chrono::Utc::now();
        let event_age = now.signed_duration_since(event.timestamp).num_seconds();
        event_age <= self.config.max_event_age
    }

    /// List registered receivers
    pub async fn list_receivers(&self) -> Vec<String> {
        let receivers = self.receivers.read().await;
        receivers.keys().cloned().collect()
    }
}

impl EkycManager {
    /// Create new eKYC manager
    pub fn new(config: EkycConfig) -> Self {
        Self {
            config,
            verification_sessions: Arc::new(RwLock::new(HashMap::new())),
        }
    }

    /// Handle verification request
    pub async fn handle_verification_request(&self, request: Value) -> Result<Value> {
        // Implement eKYC verification logic for identity assurance
        let user_id = request["user_id"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("ekyc", "Missing user_id"))?;

        let requested_ial = request["requested_ial"]
            .as_str()
            .and_then(|s| s.parse::<u8>().ok())
            .unwrap_or(1);

        // Check if requested IAL meets our minimum requirements
        if requested_ial < self.config.required_ial.clone() as u8 {
            return Err(AuthError::auth_method(
                "ekyc",
                "Insufficient identity assurance level",
            ));
        }

        // Start verification session
        let session_id = Uuid::new_v4().to_string();
        let ekyc_session = EkycSession {
            session_id: session_id.clone(),
            user_id: user_id.to_string(),
            verification_status: VerificationStatus::Pending,
            achieved_ial: IdentityAssuranceLevel::from_u8(requested_ial),
            verification_results: HashMap::new(),
        };

        // Store session
        let mut sessions = self.verification_sessions.write().await;
        sessions.insert(session_id.clone(), ekyc_session);

        Ok(json!({
            "status": "verification_initiated",
            "session_id": session_id,
            "required_ial": requested_ial,
            "required_methods": self.config.verification_methods,
            "verification_endpoint": format!("/ekyc/verify/{}", session_id)
        }))
    }

    /// Start identity verification
    pub async fn start_verification(&self, user_id: &str) -> Result<String> {
        let session_id = Uuid::new_v4().to_string();

        let session = EkycSession {
            session_id: session_id.clone(),
            user_id: user_id.to_string(),
            verification_status: VerificationStatus::Pending,
            achieved_ial: IdentityAssuranceLevel::IAL1,
            verification_results: HashMap::new(),
        };

        let mut sessions = self.verification_sessions.write().await;
        sessions.insert(session_id.clone(), session);

        Ok(session_id)
    }
}

impl FastFedManager {
    /// Create new FastFed manager
    pub fn new(config: FastFedConfig) -> Self {
        Self {
            config,
            federations: Arc::new(RwLock::new(HashMap::new())),
        }
    }

    /// Handle federation request
    pub async fn handle_federation_request(&self, request: Value) -> Result<Value> {
        // Implement FastFed federation logic for automated identity provider onboarding
        let partner_org = request["partner_organization"]
            .as_str()
            .ok_or_else(|| AuthError::auth_method("fastfed", "Missing partner_organization"))?;

        let federation_metadata = request["federation_metadata"]
            .as_object()
            .ok_or_else(|| AuthError::auth_method("fastfed", "Missing federation_metadata"))?;

        // Validate federation request against our policies
        if !self
            .config
            .trusted_partners
            .contains(&partner_org.to_string())
        {
            return Err(AuthError::auth_method(
                "fastfed",
                "Untrusted federation partner",
            ));
        }

        // Check required capabilities
        let required_capabilities = ["oidc", "saml2", "scim"];
        for capability in required_capabilities {
            if !federation_metadata.contains_key(capability) {
                return Err(AuthError::auth_method(
                    "fastfed",
                    format!("Missing required capability: {}", capability),
                ));
            }
        }

        // Auto-provision if enabled and partner is trusted
        let federation_id = if self.config.auto_provisioning {
            Some(self.establish_federation(partner_org).await?)
        } else {
            None
        };

        Ok(json!({
            "status": "federation_request_accepted",
            "federation_id": federation_id,
            "auto_provisioning": self.config.auto_provisioning,
            "supported_protocols": self.config.supported_protocols,
            "next_steps": if federation_id.is_some() {
                "Federation automatically established"
            } else {
                "Manual federation approval required"
            }
        }))
    }

    /// Establish federation
    pub async fn establish_federation(&self, partner_org: &str) -> Result<String> {
        let relationship_id = Uuid::new_v4().to_string();

        let relationship = FederationRelationship {
            relationship_id: relationship_id.clone(),
            partner_org: partner_org.to_string(),
            status: FederationStatus::Pending,
            config: json!({}),
            created_at: Utc::now(),
        };

        let mut federations = self.federations.write().await;
        federations.insert(relationship_id.clone(), relationship);

        Ok(relationship_id)
    }
}

// Default configurations for each extension

impl Default for OidcExtensionsConfig {
    fn default() -> Self {
        Self {
            enable_heart: true,
            enable_shared_signals: true,
            enable_ekyc: true,
            enable_fastfed: true,
            enable_modrna: false,  // Lower priority
            enable_igov: false,    // Lower priority
            enable_authzen: false, // Lower priority
        }
    }
}

impl Default for HeartConfig {
    fn default() -> Self {
        Self {
            organization_id: "example-healthcare-org".to_string(),
            fhir_endpoint: "https://example.com/fhir".to_string(),
            required_scopes: vec!["patient/*.read".to_string(), "user/*.read".to_string()],
            enhanced_consent: true,
            authorized_providers: Vec::new(), // Default empty list
            audit_config: HeartAuditConfig::default(),
        }
    }
}

impl Default for HeartAuditConfig {
    fn default() -> Self {
        Self {
            enable_atna: true,
            syslog_endpoint: None,
            audit_level: HeartAuditLevel::Enhanced,
        }
    }
}

impl Default for SharedSignalsConfig {
    fn default() -> Self {
        Self {
            endpoint_url: "https://example.com/signals".to_string(),
            supported_events: vec![
                "security_advisory".to_string(),
                "account_disabled".to_string(),
                "credential_change".to_string(),
                "session_revoked".to_string(),
            ],
            max_event_age: 3600, // 1 hour
            verify_events: true,
        }
    }
}

// Additional required structures for eKYC functionality
#[derive(Debug, Clone)]
pub struct VerificationSession {
    pub session_id: String,
    pub user_id: String,
    pub requested_ial: IdentityAssuranceLevel,
    pub status: String,
    pub required_methods: Vec<VerificationMethod>,
    pub completed_verifications: Vec<VerificationMethod>,
    pub created_at: SystemTime,
}

impl IdentityAssuranceLevel {
    pub fn from_u8(level: u8) -> Self {
        match level {
            1 => IdentityAssuranceLevel::IAL1,
            2 => IdentityAssuranceLevel::IAL2,
            3 => IdentityAssuranceLevel::IAL3,
            _ => IdentityAssuranceLevel::IAL1,
        }
    }
}

// Additional required structures for Shared Signals
pub struct EventTransmitter {
    pub endpoint: String,
    pub public_key: String,
}

impl EventTransmitter {
    pub async fn send_event(&self, event_jwt: &str, receiver_url: &str) -> Result<()> {
        tracing::info!("Sending event JWT to {}: {}", receiver_url, event_jwt);
        // In production, this would send HTTP POST to receiver endpoint
        Ok(())
    }
}

impl Default for EkycConfig {
    fn default() -> Self {
        Self {
            verification_provider: "example-kyc-provider".to_string(),
            required_ial: IdentityAssuranceLevel::IAL2,
            verification_methods: vec![VerificationMethod::Document, VerificationMethod::Database],
            document_verification: true,
            biometric_verification: false,
        }
    }
}

impl Default for FastFedConfig {
    fn default() -> Self {
        Self {
            metadata_endpoint: "https://example.com/.well-known/fastfed".to_string(),
            supported_protocols: vec!["OIDC".to_string(), "SAML2".to_string()],
            auto_provisioning: false,     // Require manual approval
            trusted_partners: Vec::new(), // Default empty list
            trust_anchor: "example-trust-anchor".to_string(),
        }
    }
}

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

    #[tokio::test]
    async fn test_oidc_extensions_creation() {
        let config = OidcExtensionsConfig::default();

        // Verify high-priority extensions are enabled
        assert!(config.enable_heart);
        assert!(config.enable_shared_signals);
        assert!(config.enable_ekyc);
        assert!(config.enable_fastfed);

        // Verify lower-priority extensions are disabled by default
        assert!(!config.enable_modrna);
        assert!(!config.enable_igov);
        assert!(!config.enable_authzen);
    }

    #[tokio::test]
    async fn test_heart_session_creation() {
        let config = HeartConfig::default();
        let heart_manager = HeartManager::new(config);

        let session_id = heart_manager
            .create_session(
                "provider123",
                Some("patient456"),
                vec!["patient/*.read".to_string()],
            )
            .await
            .unwrap();

        assert!(!session_id.is_empty());
    }

    #[tokio::test]
    async fn test_ekyc_verification() {
        let config = EkycConfig::default();
        let ekyc_manager = EkycManager::new(config);

        let session_id = ekyc_manager.start_verification("user123").await.unwrap();

        assert!(!session_id.is_empty());
    }

    #[tokio::test]
    async fn test_fastfed_federation() {
        let config = FastFedConfig::default();
        let fastfed_manager = FastFedManager::new(config);

        let relationship_id = fastfed_manager
            .establish_federation("partner-org")
            .await
            .unwrap();

        assert!(!relationship_id.is_empty());
    }
}