@clduab11/gemini-flow/src/core/a2a-integration.ts

Revolutionary AI agent swarm coordination platform with Google Services integration, multimedia processing, and production-ready monitoring. Features 8 Google AI services, quantum computing capabilities, and enterprise-grade security.

/**
 * A2A Security Integration Layer
 *
 * Integrates A2A security components with existing authentication and security systems:
 * - Seamless integration with AuthenticationManager
 * - Bridge to SecurityOptimizationManager features
 * - Unified security event handling and correlation
 * - Performance optimization and monitoring integration
 * - Backward compatibility with existing security flows
 * - Configuration management and policy synchronization
 */

import { EventEmitter } from "events";
import { Logger } from "../utils/logger.js";
import { AuthenticationManager, UserProfile } from "./auth-manager.js";
import { SecurityOptimizationManager } from "./security-optimization-manager.js";
import { A2ASecurityManager, A2AIdentity } from "./a2a-security-manager.js";
import { A2AKeyExchange } from "./a2a-key-exchange.js";
import { A2AMessageSecurity } from "./a2a-message-security.js";
import { A2ARateLimiter } from "./a2a-rate-limiter.js";
import { A2AAuditLogger } from "./a2a-audit-logger.js";
import { A2AZeroTrust } from "./a2a-zero-trust.js";
import { CacheManager } from "./cache-manager.js";

export interface A2AIntegrationConfig {
  enableA2ASecurity: boolean;
  enableKeyExchange: boolean;
  enableMessageSecurity: boolean;
  enableRateLimiting: boolean;
  enableAuditLogging: boolean;
  enableZeroTrust: boolean;
  bridgeToExistingSecurity: boolean;
  performanceOptimization: boolean;
  eventCorrelation: boolean;
  backwardCompatibility: boolean;
}

export interface SecurityIntegrationMetrics {
  a2aRequestsProcessed: number;
  legacyRequestsProcessed: number;
  securityEventsCorrelated: number;
  performanceOptimizationEvents: number;
  integrationErrors: number;
  averageA2AProcessingTime: number;
  averageLegacyProcessingTime: number;
  systemResourceUtilization: number;
}

export interface UnifiedSecurityEvent {
  eventId: string;
  timestamp: Date;
  source: "a2a" | "legacy" | "integrated";
  type: string;
  severity: "info" | "warning" | "error" | "critical";
  agentId?: string;
  userId?: string;
  details: Record<string, any>;
  correlatedEvents: string[];
  handledBy: string[];
}

export interface SecurityPolicySync {
  lastSync: Date;
  policies: {
    a2aPolicies: number;
    legacyPolicies: number;
    unifiedPolicies: number;
  };
  conflicts: {
    count: number;
    resolved: number;
    pending: string[];
  };
}

/**
 * Main integration orchestrator for A2A security systems
 */
export class A2ASecurityIntegration extends EventEmitter {
  private logger: Logger;
  private cache: CacheManager;
  private config: A2AIntegrationConfig;

  // Existing security systems
  private authManager: AuthenticationManager;
  private securityOptimizer: SecurityOptimizationManager;

  // A2A security components
  private a2aSecurityManager?: A2ASecurityManager;
  private keyExchange?: A2AKeyExchange;
  private messageSecurity?: A2AMessageSecurity;
  private rateLimiter?: A2ARateLimiter;
  private auditLogger?: A2AAuditLogger;
  private zeroTrust?: A2AZeroTrust;

  // Integration state
  private eventCorrelator: SecurityEventCorrelator;
  private policyManager: PolicySynchronizationManager;
  private performanceOptimizer: PerformanceOptimizationBridge;

  // Metrics and monitoring
  private metrics: SecurityIntegrationMetrics = {
    a2aRequestsProcessed: 0,
    legacyRequestsProcessed: 0,
    securityEventsCorrelated: 0,
    performanceOptimizationEvents: 0,
    integrationErrors: 0,
    averageA2AProcessingTime: 0,
    averageLegacyProcessingTime: 0,
    systemResourceUtilization: 0,
  };

  constructor(
    authManager: AuthenticationManager,
    securityOptimizer: SecurityOptimizationManager,
    config: Partial<A2AIntegrationConfig> = {},
  ) {
    super();
    this.logger = new Logger("A2ASecurityIntegration");
    this.cache = new CacheManager();
    this.authManager = authManager;
    this.securityOptimizer = securityOptimizer;

    this.initializeConfig(config);
    this.initializeA2AComponents();
    this.initializeIntegrationServices();
    this.setupEventHandlers();
    this.startMonitoring();

    this.logger.info("A2A Security Integration initialized", {
      componentsEnabled: this.getEnabledComponents(),
      bridgeEnabled: this.config.bridgeToExistingSecurity,
      performanceOptimization: this.config.performanceOptimization,
    });
  }

  /**
   * Initialize configuration with defaults
   */
  private initializeConfig(config: Partial<A2AIntegrationConfig>): void {
    this.config = {
      enableA2ASecurity: true,
      enableKeyExchange: true,
      enableMessageSecurity: true,
      enableRateLimiting: true,
      enableAuditLogging: true,
      enableZeroTrust: true,
      bridgeToExistingSecurity: true,
      performanceOptimization: true,
      eventCorrelation: true,
      backwardCompatibility: true,
      ...config,
    };
  }

  /**
   * Initialize A2A security components based on configuration
   */
  private initializeA2AComponents(): void {
    if (this.config.enableA2ASecurity) {
      this.a2aSecurityManager = new A2ASecurityManager(this.authManager);
      this.logger.info("A2A Security Manager initialized");
    }

    if (this.config.enableKeyExchange) {
      this.keyExchange = new A2AKeyExchange();
      this.logger.info("A2A Key Exchange initialized");
    }

    if (this.config.enableMessageSecurity) {
      this.messageSecurity = new A2AMessageSecurity();
      this.logger.info("A2A Message Security initialized");
    }

    if (this.config.enableRateLimiting) {
      this.rateLimiter = new A2ARateLimiter();
      this.logger.info("A2A Rate Limiter initialized");
    }

    if (this.config.enableAuditLogging) {
      this.auditLogger = new A2AAuditLogger();
      this.logger.info("A2A Audit Logger initialized");
    }

    if (this.config.enableZeroTrust) {
      this.zeroTrust = new A2AZeroTrust();
      this.logger.info("A2A Zero Trust initialized");
    }
  }

  /**
   * Initialize integration services
   */
  private initializeIntegrationServices(): void {
    this.eventCorrelator = new SecurityEventCorrelator(this.config);
    this.policyManager = new PolicySynchronizationManager(this.config);
    this.performanceOptimizer = new PerformanceOptimizationBridge(
      this.securityOptimizer,
      this.config,
    );

    this.logger.info("Integration services initialized");
  }

  /**
   * Setup event handlers for component integration
   */
  private setupEventHandlers(): void {
    // Bridge authentication events
    this.authManager.on("user_authenticated", (profile: UserProfile) => {
      this.handleUserAuthentication(profile);
    });

    this.authManager.on("session_expired", (userId: string) => {
      this.handleSessionExpiration(userId);
    });

    // Bridge security optimization events
    this.securityOptimizer.on("optimization_enabled", (event) => {
      this.handleOptimizationEvent(event);
    });

    this.securityOptimizer.on("security_alert", (event) => {
      this.handleSecurityAlert(event);
    });

    // Handle A2A security events
    if (this.a2aSecurityManager) {
      this.a2aSecurityManager.on(
        "agent_registered",
        (identity: A2AIdentity) => {
          this.handleAgentRegistration(identity);
        },
      );

      this.a2aSecurityManager.on("session_established", (session) => {
        this.handleA2ASessionEstablished(session);
      });
    }

    // Handle rate limiting events
    if (this.rateLimiter) {
      this.rateLimiter.on("agent_blocked", (event) => {
        this.handleAgentBlocked(event);
      });

      this.rateLimiter.on("ddos_detected", (event) => {
        this.handleDDoSDetection(event);
      });
    }

    // Handle zero trust events
    if (this.zeroTrust) {
      this.zeroTrust.on("access_decision", (event) => {
        this.handleAccessDecision(event);
      });

      this.zeroTrust.on("agent_quarantined", (event) => {
        this.handleAgentQuarantine(event);
      });
    }

    // Handle audit events
    if (this.auditLogger) {
      this.auditLogger.on("security_alert", (alert) => {
        this.handleAuditSecurityAlert(alert);
      });
    }
  }

  /**
   * Unified authentication method that supports both user and agent authentication
   */
  async authenticateEntity(
    entityType: "user" | "agent",
    credentials: any,
    options: {
      enableA2A?: boolean;
      capabilities?: string[];
      sessionDuration?: number;
    } = {},
  ): Promise<{
    success: boolean;
    profile?: UserProfile | A2AIdentity;
    session?: any;
    securityLevel: string;
    warnings?: string[];
  }> {
    const startTime = Date.now();

    try {
      if (entityType === "user") {
        // Use existing user authentication
        const profile = await this.authManager.authenticateUser(credentials);
        this.metrics.legacyRequestsProcessed++;

        const processingTime = Date.now() - startTime;
        this.metrics.averageLegacyProcessingTime =
          (this.metrics.averageLegacyProcessingTime + processingTime) / 2;

        return {
          success: true,
          profile,
          securityLevel: profile.tier,
          warnings: [],
        };
      } else if (
        entityType === "agent" &&
        this.a2aSecurityManager &&
        options.enableA2A !== false
      ) {
        // Use A2A authentication
        const identity = await this.a2aSecurityManager.registerAgent(
          credentials.agentId,
          credentials.agentType,
          credentials.publicKey,
          credentials.certificates,
          options.capabilities || [],
        );

        this.metrics.a2aRequestsProcessed++;

        const processingTime = Date.now() - startTime;
        this.metrics.averageA2AProcessingTime =
          (this.metrics.averageA2AProcessingTime + processingTime) / 2;

        return {
          success: true,
          profile: identity,
          securityLevel: identity.trustLevel,
          warnings: [],
        };
      } else {
        // Fallback to legacy authentication for agents
        this.logger.warn(
          "A2A authentication not available, using legacy fallback",
          {
            entityType,
            enableA2A: options.enableA2A,
          },
        );

        return {
          success: false,
          securityLevel: "unknown",
          warnings: ["A2A authentication not available"],
        };
      }
    } catch (error) {
      this.metrics.integrationErrors++;
      this.logger.error("Entity authentication failed", { entityType, error });

      return {
        success: false,
        securityLevel: "unknown",
        warnings: [error.message],
      };
    }
  }

  /**
   * Unified access control that bridges legacy and A2A systems
   */
  async checkAccess(
    entityId: string,
    resource: string,
    action: string,
    context: {
      entityType?: "user" | "agent";
      sourceIP?: string;
      userAgent?: string;
      sessionId?: string;
      capabilities?: string[];
    },
  ): Promise<{
    allowed: boolean;
    reason: string;
    conditions?: string[];
    monitoring?: string[];
    securityLevel: string;
  }> {
    try {
      const entityType = context.entityType || this.detectEntityType(entityId);

      if (entityType === "agent" && this.zeroTrust) {
        // Use Zero Trust for agent access control
        const decision = await this.zeroTrust.evaluateAccess(
          entityId,
          resource,
          action,
          {
            source: {
              ip: context.sourceIP || "unknown",
              network: { segment: "default" },
            },
            identity: {
              verified: true,
              authMethod: "a2a",
              certificates: [],
              trustLevel: "verified",
            },
            metadata: {
              entityType,
              capabilities: context.capabilities,
            },
          },
        );

        return {
          allowed: decision.allowed,
          reason: decision.reason,
          conditions: decision.conditions,
          monitoring: decision.monitoring,
          securityLevel: decision.riskLevel,
        };
      } else {
        // Use legacy permission system for users
        const hasPermission = await this.authManager.hasPermission(
          entityId,
          action,
        );

        return {
          allowed: hasPermission,
          reason: hasPermission ? "Permission granted" : "Permission denied",
          securityLevel: "standard",
        };
      }
    } catch (error) {
      this.metrics.integrationErrors++;
      this.logger.error("Access check failed", {
        entityId,
        resource,
        action,
        error,
      });

      return {
        allowed: false,
        reason: "Access check error",
        securityLevel: "unknown",
      };
    }
  }

  /**
   * Unified rate limiting that considers both user and agent patterns
   */
  async checkRateLimit(
    entityId: string,
    entityType: "user" | "agent",
    action: string,
    context: {
      sourceIP?: string;
      messageType?: string;
      payloadSize?: number;
    },
  ): Promise<{
    allowed: boolean;
    reason?: string;
    retryAfter?: number;
    quotaInfo?: any;
  }> {
    try {
      if (entityType === "agent" && this.rateLimiter) {
        // Use A2A rate limiting for agents
        const result = await this.rateLimiter.checkRateLimit(
          entityId,
          context.messageType,
          context.payloadSize,
          context.sourceIP,
        );

        return {
          allowed: result.allowed,
          reason: result.reason,
          retryAfter: result.retryAfter,
          quotaInfo: {
            tokensRemaining: result.tokensRemaining,
            quotaResetTime: result.quotaResetTime,
          },
        };
      } else {
        // Use legacy quota system for users
        const quotaCheck = await this.authManager.checkQuota(entityId);

        return {
          allowed: quotaCheck,
          reason: quotaCheck ? "Within quota" : "Quota exceeded",
          quotaInfo: { legacy: true },
        };
      }
    } catch (error) {
      this.metrics.integrationErrors++;
      this.logger.error("Rate limit check failed", {
        entityId,
        entityType,
        error,
      });

      // Fail open for availability
      return {
        allowed: true,
        reason: "Rate limit check error - failing open",
      };
    }
  }

  /**
   * Unified audit logging for both systems
   */
  async logSecurityEvent(
    eventType: string,
    entityId: string,
    entityType: "user" | "agent",
    details: {
      action: string;
      resource: string;
      outcome: "success" | "failure" | "denied";
      metadata?: Record<string, any>;
      sourceIP?: string;
      userAgent?: string;
    },
  ): Promise<void> {
    try {
      const unifiedEvent: UnifiedSecurityEvent = {
        eventId: crypto.randomUUID(),
        timestamp: new Date(),
        source: entityType === "agent" ? "a2a" : "legacy",
        type: eventType,
        severity: this.determineSeverity(eventType, details.outcome),
        agentId: entityType === "agent" ? entityId : undefined,
        userId: entityType === "user" ? entityId : undefined,
        details: {
          action: details.action,
          resource: details.resource,
          outcome: details.outcome,
          sourceIP: details.sourceIP,
          userAgent: details.userAgent,
          ...details.metadata,
        },
        correlatedEvents: [],
        handledBy: [],
      };

      // Log to A2A audit system if available
      if (
        this.auditLogger &&
        (entityType === "agent" || this.config.bridgeToExistingSecurity)
      ) {
        await this.auditLogger.logEvent(
          eventType as any,
          eventType,
          {
            agentId: entityId,
            agentType: entityType,
            sourceIP: details.sourceIP,
            userAgent: details.userAgent,
          },
          {
            resource: details.resource,
            resourceType: "api",
            resourceId: details.resource,
          },
          details.action,
          details.outcome as any,
          {
            description: `${details.action} on ${details.resource}`,
            metadata: details.metadata || {},
          },
        );

        unifiedEvent.handledBy.push("a2a-audit");
      }

      // Correlate with related events
      if (this.config.eventCorrelation) {
        const correlatedEvents =
          await this.eventCorrelator.correlateEvent(unifiedEvent);
        unifiedEvent.correlatedEvents = correlatedEvents.map((e) => e.eventId);

        if (correlatedEvents.length > 0) {
          this.metrics.securityEventsCorrelated++;
        }
      }

      // Store unified event
      await this.cache.set(
        `security_event:${unifiedEvent.eventId}`,
        unifiedEvent,
        86400000, // 24 hours
      );

      this.emit("security_event_logged", unifiedEvent);
    } catch (error) {
      this.metrics.integrationErrors++;
      this.logger.error("Security event logging failed", {
        eventType,
        entityId,
        error,
      });
    }
  }

  /**
   * Get comprehensive security status for an entity
   */
  async getSecurityStatus(
    entityId: string,
    entityType: "user" | "agent",
  ): Promise<{
    trustScore?: number;
    riskLevel?: string;
    lastActivity?: Date;
    securityAlerts?: any[];
    quotaStatus?: any;
    permissions?: string[];
    quarantined?: boolean;
  }> {
    try {
      const status: any = {};

      if (entityType === "agent") {
        // Get A2A security status
        if (this.zeroTrust) {
          const trustScore = this.zeroTrust.getTrustScore(entityId);
          if (trustScore) {
            status.trustScore = trustScore.overallScore;
            status.lastActivity = trustScore.lastUpdated;
          }

          status.quarantined =
            await this.zeroTrust.isAgentQuarantined(entityId);
        }

        if (this.auditLogger) {
          const alerts = this.auditLogger.getSecurityAlerts(10);
          status.securityAlerts = alerts.filter(
            (alert) => alert.source.agentId === entityId,
          );
        }
      } else {
        // Get user security status
        const profile = await this.authManager.validateSession(entityId);
        if (profile) {
          status.lastActivity = profile.metadata.lastActive;
          status.permissions = profile.permissions;
          status.quotaStatus = {
            daily: profile.quotas.daily,
            monthly: profile.quotas.monthly,
            concurrent: profile.quotas.concurrent,
          };
        }
      }

      return status;
    } catch (error) {
      this.logger.error("Failed to get security status", {
        entityId,
        entityType,
        error,
      });
      return {};
    }
  }

  /**
   * Emergency security lockdown
   */
  async emergencyLockdown(
    reason: string,
    scope: "system" | "a2a" | "legacy" = "system",
  ): Promise<void> {
    this.logger.error("Emergency security lockdown initiated", {
      reason,
      scope,
    });

    try {
      if (scope === "system" || scope === "legacy") {
        await this.securityOptimizer.emergencyStop(reason);
      }

      if (scope === "system" || scope === "a2a") {
        // Lockdown A2A components
        if (this.a2aSecurityManager) {
          await this.a2aSecurityManager.emergencyShutdown(reason);
        }

        if (this.rateLimiter) {
          // Block all agents temporarily
          this.rateLimiter.getMetrics();
          // Implementation would block all known agents
        }

        if (this.zeroTrust) {
          // Set all policies to deny
          // Implementation would update policies
        }
      }

      this.emit("emergency_lockdown", { reason, scope, timestamp: Date.now() });
    } catch (error) {
      this.logger.error("Emergency lockdown failed", { reason, scope, error });
      throw error;
    }
  }

  /**
   * Event handlers for component integration
   */

  private async handleUserAuthentication(profile: UserProfile): Promise<void> {
    // Bridge user authentication to A2A system if configured
    if (this.config.bridgeToExistingSecurity && this.auditLogger) {
      await this.auditLogger.logEvent(
        "authentication",
        "user_auth",
        {
          agentId: profile.id,
          agentType: "user",
          sourceIP: "unknown",
        },
        {
          resource: "authentication_system",
          resourceType: "system",
        },
        "login",
        "success",
        {
          description: "User authentication successful",
          metadata: {
            tier: profile.tier,
            organization: profile.organization,
          },
        },
      );
    }
  }

  private async handleSessionExpiration(userId: string): Promise<void> {
    if (this.config.bridgeToExistingSecurity && this.auditLogger) {
      await this.auditLogger.logEvent(
        "authentication",
        "session_management",
        {
          agentId: userId,
          agentType: "user",
        },
        {
          resource: "user_session",
          resourceType: "session",
        },
        "expire",
        "success",
        {
          description: "User session expired",
        },
      );
    }
  }

  private async handleOptimizationEvent(event: any): Promise<void> {
    this.metrics.performanceOptimizationEvents++;

    // Correlate optimization events with security events
    if (this.config.eventCorrelation) {
      await this.eventCorrelator.correlateOptimizationEvent(event);
    }
  }

  private async handleSecurityAlert(event: any): Promise<void> {
    // Bridge security alerts to A2A audit system
    if (this.auditLogger) {
      await this.auditLogger.createSecurityAlert(
        "policy_violation",
        "medium",
        "Security optimization alert",
        event.details || "Security alert from optimization manager",
        { agentId: event.agentId || "system" },
      );
    }
  }

  private async handleAgentRegistration(identity: A2AIdentity): Promise<void> {
    this.logger.info("Agent registered via A2A", {
      agentId: identity.agentId,
      agentType: identity.agentType,
      trustLevel: identity.trustLevel,
    });

    // Initialize zero trust score if available
    if (this.zeroTrust) {
      await this.zeroTrust.updateTrustScore(identity.agentId, {
        type: "authentication",
        outcome: "positive",
        details: { initial_registration: true },
      });
    }
  }

  private async handleA2ASessionEstablished(session: any): Promise<void> {
    this.logger.debug("A2A session established", {
      sessionId: session.sessionId,
      agentId: session.agentId,
      trustScore: session.trustScore,
    });
  }

  private async handleAgentBlocked(event: any): Promise<void> {
    this.logger.warn("Agent blocked by rate limiter", event);

    // Update zero trust score
    if (this.zeroTrust) {
      await this.zeroTrust.updateTrustScore(event.agentId, {
        type: "security_incident",
        outcome: "negative",
        details: { rate_limit_exceeded: true },
      });
    }
  }

  private async handleDDoSDetection(event: any): Promise<void> {
    this.logger.error("DDoS attack detected", event);

    // Quarantine attacking agent if zero trust is available
    if (this.zeroTrust) {
      await this.zeroTrust.quarantineAgent(
        event.agentId,
        "DDoS attack detected",
        3600000, // 1 hour
      );
    }
  }

  private async handleAccessDecision(event: any): Promise<void> {
    if (!event.decision.allowed) {
      this.logger.warn("Access denied by zero trust", {
        agentId: event.agentId,
        resource: event.resource,
        reason: event.decision.reason,
      });
    }
  }

  private async handleAgentQuarantine(event: any): Promise<void> {
    this.logger.warn("Agent quarantined", event);

    // Notify security optimization manager
    this.securityOptimizer.emit("agent_quarantined", event);
  }

  private async handleAuditSecurityAlert(alert: any): Promise<void> {
    this.logger.warn("Security alert from audit system", {
      alertId: alert.alertId,
      severity: alert.severity,
      type: alert.alertType,
    });

    // Bridge to security optimization manager
    this.securityOptimizer.emit("security_alert", {
      source: "a2a_audit",
      alert,
    });
  }

  /**
   * Utility methods
   */

  private detectEntityType(entityId: string): "user" | "agent" {
    // Simple heuristic - in production, use proper registry
    return entityId.includes("-") ? "agent" : "user";
  }

  private determineSeverity(
    eventType: string,
    outcome: string,
  ): "info" | "warning" | "error" | "critical" {
    if (outcome === "failure" || outcome === "denied") {
      if (eventType.includes("security") || eventType.includes("auth")) {
        return "error";
      }
      return "warning";
    }

    return "info";
  }

  private getEnabledComponents(): string[] {
    const components: string[] = [];

    if (this.config.enableA2ASecurity) components.push("a2a-security");
    if (this.config.enableKeyExchange) components.push("key-exchange");
    if (this.config.enableMessageSecurity) components.push("message-security");
    if (this.config.enableRateLimiting) components.push("rate-limiting");
    if (this.config.enableAuditLogging) components.push("audit-logging");
    if (this.config.enableZeroTrust) components.push("zero-trust");

    return components;
  }

  private startMonitoring(): void {
    setInterval(() => {
      this.collectMetrics();
    }, 60000); // Every minute

    setInterval(() => {
      this.performHealthCheck();
    }, 300000); // Every 5 minutes
  }

  private collectMetrics(): void {
    // Calculate system resource utilization
    this.metrics.systemResourceUtilization =
      this.calculateResourceUtilization();

    this.emit("metrics_collected", this.metrics);
  }

  private calculateResourceUtilization(): number {
    // Placeholder for resource utilization calculation
    return Math.random() * 100;
  }

  private async performHealthCheck(): Promise<void> {
    const healthStatus = {
      timestamp: new Date(),
      components: {
        authManager: this.checkComponentHealth(this.authManager),
        securityOptimizer: this.checkComponentHealth(this.securityOptimizer),
        a2aSecurityManager: this.checkComponentHealth(this.a2aSecurityManager),
        keyExchange: this.checkComponentHealth(this.keyExchange),
        messageSecurity: this.checkComponentHealth(this.messageSecurity),
        rateLimiter: this.checkComponentHealth(this.rateLimiter),
        auditLogger: this.checkComponentHealth(this.auditLogger),
        zeroTrust: this.checkComponentHealth(this.zeroTrust),
      },
    };

    this.emit("health_check", healthStatus);

    const unhealthyComponents = Object.entries(healthStatus.components)
      .filter(([_, healthy]) => !healthy)
      .map(([name, _]) => name);

    if (unhealthyComponents.length > 0) {
      this.logger.warn("Unhealthy components detected", {
        unhealthyComponents,
      });
    }
  }

  private checkComponentHealth(component: any): boolean {
    return component !== undefined && component !== null;
  }

  /**
   * Public API methods
   */

  getMetrics(): SecurityIntegrationMetrics {
    return { ...this.metrics };
  }

  getConfig(): A2AIntegrationConfig {
    return { ...this.config };
  }

  async updateConfig(updates: Partial<A2AIntegrationConfig>): Promise<void> {
    this.config = { ...this.config, ...updates };

    this.logger.info("Integration config updated", updates);
    this.emit("config_updated", this.config);
  }

  getComponentStatus(): Record<string, boolean> {
    return {
      authManager: !!this.authManager,
      securityOptimizer: !!this.securityOptimizer,
      a2aSecurityManager: !!this.a2aSecurityManager,
      keyExchange: !!this.keyExchange,
      messageSecurity: !!this.messageSecurity,
      rateLimiter: !!this.rateLimiter,
      auditLogger: !!this.auditLogger,
      zeroTrust: !!this.zeroTrust,
    };
  }
}

/**
 * Supporting classes for integration
 */

class SecurityEventCorrelator {
  constructor(private config: A2AIntegrationConfig) {}

  async correlateEvent(
    _event: UnifiedSecurityEvent,
  ): Promise<UnifiedSecurityEvent[]> {
    // Placeholder for event correlation logic
    return [];
  }

  async correlateOptimizationEvent(_event: any): Promise<void> {
    // Placeholder for optimization event correlation
  }
}

class PolicySynchronizationManager {
  constructor(private config: A2AIntegrationConfig) {}

  async synchronizePolicies(): Promise<SecurityPolicySync> {
    // Placeholder for policy synchronization
    return {
      lastSync: new Date(),
      policies: {
        a2aPolicies: 0,
        legacyPolicies: 0,
        unifiedPolicies: 0,
      },
      conflicts: {
        count: 0,
        resolved: 0,
        pending: [],
      },
    };
  }
}

class PerformanceOptimizationBridge {
  constructor(
    private securityOptimizer: SecurityOptimizationManager,
    private config: A2AIntegrationConfig,
  ) {}

  async optimizePerformance(): Promise<void> {
    // Bridge performance optimization between systems
    if (this.config.performanceOptimization) {
      // Implementation would coordinate performance optimizations
    }
  }
}