@clduab11/gemini-flow/src/services/google-services/infrastructure/a2a-multimedia-protocol-extensions.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 Multimedia Protocol Extensions
 * Supporting classes and implementations for the main protocol
 */

import { EventEmitter } from "events";
import { Logger } from "../../../utils/logger.js";
import {
  A2AMultimediaSession,
  A2AMultimediaMessage,
  QoSRequirements,
  SessionStatistics,
  MessageStatistics,
  BandwidthStatistics,
  LatencyStatistics,
  QualityStatistics,
  ErrorStatistics,
} from "./a2a-multimedia-protocol.js";

// ==================== ROUTING ENGINE IMPLEMENTATION ====================

export class RoutingEngine extends EventEmitter {
  private logger: Logger;
  private routingTable: Map<string, RouteEntry[]> = new Map();
  private networkTopology: NetworkTopology;
  private routeCache: Map<string, CachedRoute> = new Map();

  constructor() {
    super();
    this.logger = new Logger("RoutingEngine");
    this.networkTopology = new NetworkTopology();
  }

  async initialize(): Promise<void> {
    try {
      this.logger.info("Initializing routing engine");

      // Initialize network topology discovery
      await this.networkTopology.initialize();

      // Start route optimization
      this.startRouteOptimization();

      // Setup topology monitoring
      this.startTopologyMonitoring();
    } catch (error) {
      this.logger.error("Failed to initialize routing engine", error);
      throw error;
    }
  }

  async findOptimalRoute(
    sourceId: string,
    targetId: string,
    qos: QoSRequirements,
  ): Promise<OptimalRoute | null> {
    try {
      // Check cache first
      const cacheKey = `${sourceId}:${targetId}:${JSON.stringify(qos)}`;
      const cachedRoute = this.routeCache.get(cacheKey);

      if (cachedRoute && this.isRouteCacheValid(cachedRoute)) {
        this.logger.debug("Using cached route", { sourceId, targetId });
        return cachedRoute.route;
      }

      // Calculate new route
      const route = await this.calculateOptimalRoute(sourceId, targetId, qos);

      if (route) {
        // Cache the route
        this.routeCache.set(cacheKey, {
          route,
          timestamp: new Date(),
          hits: 0,
        });
      }

      return route;
    } catch (error) {
      this.logger.error("Failed to find optimal route", error);
      this.emit("route:failed", { sourceId, targetId, error: error.message });
      return null;
    }
  }

  private async calculateOptimalRoute(
    sourceId: string,
    targetId: string,
    qos: QoSRequirements,
  ): Promise<OptimalRoute | null> {
    // Get available paths from topology
    const availablePaths = await this.networkTopology.findPaths(
      sourceId,
      targetId,
    );

    if (availablePaths.length === 0) {
      return null;
    }

    // Score each path based on QoS requirements
    const scoredPaths = await Promise.all(
      availablePaths.map(async (path) => {
        const score = await this.scorePath(path, qos);
        return { path, score };
      }),
    );

    // Sort by score (highest first)
    scoredPaths.sort((a, b) => b.score - a.score);

    // Return the best path
    const bestPath = scoredPaths[0];
    if (bestPath.score > 0) {
      return {
        path: bestPath.path.nodes,
        hops: bestPath.path.nodes.length - 1,
        score: bestPath.score,
        estimatedLatency: bestPath.path.totalLatency,
        estimatedBandwidth: bestPath.path.minBandwidth,
      };
    }

    return null;
  }

  private async scorePath(
    path: NetworkPath,
    qos: QoSRequirements,
  ): Promise<number> {
    let score = 100; // Start with perfect score

    // Latency scoring
    if (path.totalLatency > qos.maxLatency) {
      score -= (path.totalLatency - qos.maxLatency) * 2;
    }

    // Bandwidth scoring
    if (path.minBandwidth < qos.minBandwidth) {
      score -= ((qos.minBandwidth - path.minBandwidth) / 1000000) * 10;
    }

    // Reliability scoring
    const pathReliability = path.links.reduce(
      (r, link) => r * link.reliability,
      1,
    );
    if (pathReliability < qos.reliability) {
      score -= (qos.reliability - pathReliability) * 50;
    }

    // Priority scoring
    score += qos.priority * 0.1;

    // Hop count penalty
    score -= path.nodes.length * 2;

    return Math.max(0, score);
  }

  private isRouteCacheValid(cachedRoute: CachedRoute): boolean {
    const age = Date.now() - cachedRoute.timestamp.getTime();
    return age < 30000; // 30 seconds cache validity
  }

  private startRouteOptimization(): void {
    setInterval(() => {
      this.optimizeRoutes();
    }, 60000); // Optimize every minute
  }

  private optimizeRoutes(): void {
    // Clean expired cache entries
    for (const [key, cachedRoute] of this.routeCache) {
      if (!this.isRouteCacheValid(cachedRoute)) {
        this.routeCache.delete(key);
      }
    }

    this.logger.debug("Route cache optimized", {
      entriesRemaining: this.routeCache.size,
    });
  }

  private startTopologyMonitoring(): void {
    setInterval(() => {
      this.monitorTopology();
    }, 10000); // Monitor every 10 seconds
  }

  private monitorTopology(): void {
    // Monitor network topology changes
    this.logger.debug("Monitoring network topology");
  }
}

class NetworkTopology {
  private logger: Logger;
  private nodes: Map<string, NetworkNode> = new Map();
  private links: Map<string, NetworkLink> = new Map();

  constructor() {
    this.logger = new Logger("NetworkTopology");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing network topology");
    // In production, discover actual network topology
    await this.discoverTopology();
  }

  async findPaths(sourceId: string, targetId: string): Promise<NetworkPath[]> {
    // Simple pathfinding - in production, use more sophisticated algorithms
    const paths: NetworkPath[] = [];

    // Direct path
    const directLink = this.links.get(`${sourceId}:${targetId}`);
    if (directLink) {
      paths.push({
        nodes: [sourceId, targetId],
        links: [directLink],
        totalLatency: directLink.latency,
        minBandwidth: directLink.bandwidth,
        reliability: directLink.reliability,
      });
    }

    // Multi-hop paths (simplified)
    for (const [linkId, link] of this.links) {
      if (link.sourceId === sourceId && link.targetId !== targetId) {
        const subPaths = await this.findPaths(link.targetId, targetId);
        for (const subPath of subPaths) {
          if (!subPath.nodes.includes(sourceId)) {
            // Avoid loops
            paths.push({
              nodes: [sourceId, ...subPath.nodes],
              links: [link, ...subPath.links],
              totalLatency: link.latency + subPath.totalLatency,
              minBandwidth: Math.min(link.bandwidth, subPath.minBandwidth),
              reliability: link.reliability * subPath.reliability,
            });
          }
        }
      }
    }

    return paths.slice(0, 5); // Limit to 5 best paths
  }

  private async discoverTopology(): Promise<void> {
    // Simulate network topology discovery
    // In production, this would use network discovery protocols

    const agents = ["agent1", "agent2", "agent3", "agent4", "agent5"];

    // Create nodes
    for (const agentId of agents) {
      this.nodes.set(agentId, {
        id: agentId,
        type: "agent",
        capabilities: { bandwidth: 10000000, latency: 10, reliability: 0.99 },
        status: "active",
      });
    }

    // Create links (simplified mesh topology)
    for (let i = 0; i < agents.length; i++) {
      for (let j = i + 1; j < agents.length; j++) {
        const sourceId = agents[i];
        const targetId = agents[j];
        const linkId = `${sourceId}:${targetId}`;

        this.links.set(linkId, {
          id: linkId,
          sourceId,
          targetId,
          bandwidth: Math.random() * 5000000 + 1000000, // 1-6 Mbps
          latency: Math.random() * 50 + 10, // 10-60ms
          reliability: Math.random() * 0.1 + 0.9, // 90-99%
          status: "active",
        });
      }
    }

    this.logger.info("Network topology discovered", {
      nodes: this.nodes.size,
      links: this.links.size,
    });
  }
}

// ==================== STREAMING AND SESSION SUPPORT ====================

export class MediaStreamBuffer {
  private streamId: string;
  private config: any;
  private buffer: Buffer[] = [];
  private maxBufferSize: number;
  private logger: Logger;

  constructor(streamId: string, config: any) {
    this.streamId = streamId;
    this.config = config;
    this.maxBufferSize = config.bufferSize || 1024 * 1024; // 1MB default
    this.logger = new Logger("MediaStreamBuffer");
  }

  addData(data: Buffer): void {
    this.buffer.push(data);

    // Manage buffer size
    const totalSize = this.buffer.reduce((sum, buf) => sum + buf.length, 0);
    if (totalSize > this.maxBufferSize) {
      // Remove oldest data
      this.buffer.shift();
    }
  }

  getData(): Buffer | null {
    return this.buffer.shift() || null;
  }

  getBufferStats(): { size: number; chunks: number; utilization: number } {
    const totalSize = this.buffer.reduce((sum, buf) => sum + buf.length, 0);
    return {
      size: totalSize,
      chunks: this.buffer.length,
      utilization: totalSize / this.maxBufferSize,
    };
  }
}

export class StreamMonitor extends EventEmitter {
  private streamId: string;
  private targets: string[];
  private logger: Logger;
  private active: boolean = false;
  private metrics: StreamMetrics;

  constructor(streamId: string, targets: string[]) {
    super();
    this.streamId = streamId;
    this.targets = targets;
    this.logger = new Logger("StreamMonitor");
    this.metrics = this.initializeMetrics();
  }

  start(): void {
    this.active = true;
    this.logger.info("Starting stream monitoring", {
      streamId: this.streamId,
      targets: this.targets.length,
    });

    this.startMonitoring();
  }

  stop(): void {
    this.active = false;
    this.logger.info("Stopping stream monitoring", {
      streamId: this.streamId,
    });
  }

  private startMonitoring(): void {
    const monitorInterval = setInterval(() => {
      if (!this.active) {
        clearInterval(monitorInterval);
        return;
      }

      this.collectMetrics();
      this.analyzeMetrics();
    }, 1000); // Monitor every second
  }

  private collectMetrics(): void {
    // Simulate metric collection
    this.metrics.bandwidth.current = Math.random() * 1000000 + 500000; // 0.5-1.5 Mbps
    this.metrics.latency.current = Math.random() * 50 + 20; // 20-70ms
    this.metrics.packetLoss = Math.random() * 0.05; // 0-5%
    this.metrics.jitter = Math.random() * 10 + 2; // 2-12ms
  }

  private analyzeMetrics(): void {
    // Analyze for quality issues
    if (this.metrics.packetLoss > 0.02) {
      // > 2%
      this.emit("quality:degraded", {
        streamId: this.streamId,
        issue: "high_packet_loss",
        value: this.metrics.packetLoss,
      });
    }

    if (this.metrics.latency.current > 100) {
      // > 100ms
      this.emit("quality:degraded", {
        streamId: this.streamId,
        issue: "high_latency",
        value: this.metrics.latency.current,
      });
    }
  }

  private initializeMetrics(): StreamMetrics {
    return {
      bandwidth: { current: 0, average: 0, peak: 0 },
      latency: { current: 0, average: 0, min: 999, max: 0 },
      packetLoss: 0,
      jitter: 0,
      quality: 100,
    };
  }
}

// ==================== SESSION MANAGEMENT ====================

export class SessionPersistenceManager {
  private logger: Logger;
  private persistedSessions: Map<string, PersistedSessionData> = new Map();
  private storageBackend: SessionStorageBackend;

  constructor(storageConfig: any = {}) {
    this.logger = new Logger("SessionPersistenceManager");
    this.storageBackend = new SessionStorageBackend(storageConfig);
  }

  async initialize(): Promise<void> {
    try {
      this.logger.info("Initializing session persistence manager");
      await this.storageBackend.initialize();
      await this.loadPersistedSessions();
    } catch (error) {
      this.logger.error("Failed to initialize session persistence", error);
      throw error;
    }
  }

  async persistSession(session: A2AMultimediaSession): Promise<void> {
    try {
      const sessionData: PersistedSessionData = {
        sessionId: session.id,
        type: session.type,
        participants: session.participants,
        configuration: session.configuration,
        state: session.state,
        statistics: session.statistics,
        synchronization: session.synchronization,
        timestamp: new Date(),
      };

      await this.storageBackend.store(session.id, sessionData);
      this.persistedSessions.set(session.id, sessionData);

      this.logger.debug("Session persisted", { sessionId: session.id });
    } catch (error) {
      this.logger.error("Failed to persist session", error);
      throw error;
    }
  }

  async restoreSession(
    sessionId: string,
  ): Promise<A2AMultimediaSession | null> {
    try {
      const sessionData = await this.storageBackend.retrieve(sessionId);
      if (!sessionData) {
        return null;
      }

      // Reconstruct session object
      const session: A2AMultimediaSession = {
        id: sessionData.sessionId,
        type: sessionData.type,
        participants: sessionData.participants,
        configuration: sessionData.configuration,
        state: sessionData.state,
        statistics: sessionData.statistics,
        synchronization: sessionData.synchronization,
      };

      this.logger.info("Session restored", { sessionId });
      return session;
    } catch (error) {
      this.logger.error("Failed to restore session", error);
      return null;
    }
  }

  async deleteSession(sessionId: string): Promise<void> {
    try {
      await this.storageBackend.delete(sessionId);
      this.persistedSessions.delete(sessionId);

      this.logger.debug("Session deleted", { sessionId });
    } catch (error) {
      this.logger.error("Failed to delete session", error);
      throw error;
    }
  }

  async listPersistedSessions(): Promise<string[]> {
    return Array.from(this.persistedSessions.keys());
  }

  private async loadPersistedSessions(): Promise<void> {
    try {
      const sessionIds = await this.storageBackend.list();

      for (const sessionId of sessionIds) {
        const sessionData = await this.storageBackend.retrieve(sessionId);
        if (sessionData) {
          this.persistedSessions.set(sessionId, sessionData);
        }
      }

      this.logger.info("Loaded persisted sessions", {
        count: this.persistedSessions.size,
      });
    } catch (error) {
      this.logger.error("Failed to load persisted sessions", error);
    }
  }
}

class SessionStorageBackend {
  private logger: Logger;
  private storage: Map<string, PersistedSessionData> = new Map();

  constructor(config: any) {
    this.logger = new Logger("SessionStorageBackend");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing session storage backend");
    // In production, connect to actual storage (Redis, Database, etc.)
  }

  async store(sessionId: string, data: PersistedSessionData): Promise<void> {
    this.storage.set(sessionId, data);
  }

  async retrieve(sessionId: string): Promise<PersistedSessionData | null> {
    return this.storage.get(sessionId) || null;
  }

  async delete(sessionId: string): Promise<void> {
    this.storage.delete(sessionId);
  }

  async list(): Promise<string[]> {
    return Array.from(this.storage.keys());
  }
}

// ==================== HELPER IMPLEMENTATIONS ====================

export class ProtocolStatisticsCalculator {
  private logger: Logger;

  constructor() {
    this.logger = new Logger("ProtocolStatisticsCalculator");
  }

  async calculateMessageStatistics(
    sessionId: string,
  ): Promise<MessageStatistics> {
    // Simulate message statistics calculation
    return {
      sent: Math.floor(Math.random() * 1000) + 100,
      received: Math.floor(Math.random() * 950) + 90,
      dropped: Math.floor(Math.random() * 10),
      retransmitted: Math.floor(Math.random() * 20),
      duplicate: Math.floor(Math.random() * 5),
    };
  }

  async calculateBandwidthStatistics(
    sessionId: string,
  ): Promise<BandwidthStatistics> {
    const uploadCurrent = Math.random() * 1000000;
    const downloadCurrent = Math.random() * 2000000;

    return {
      upload: {
        current: uploadCurrent,
        average: uploadCurrent * 0.8,
        peak: uploadCurrent * 1.5,
        utilization: Math.random() * 0.8,
      },
      download: {
        current: downloadCurrent,
        average: downloadCurrent * 0.8,
        peak: downloadCurrent * 1.5,
        utilization: Math.random() * 0.8,
      },
      total: {
        current: uploadCurrent + downloadCurrent,
        average: (uploadCurrent + downloadCurrent) * 0.8,
        peak: (uploadCurrent + downloadCurrent) * 1.5,
        utilization: Math.random() * 0.8,
      },
    };
  }

  async calculateLatencyStatistics(
    sessionId: string,
  ): Promise<LatencyStatistics> {
    const current = Math.random() * 100 + 20;

    return {
      current,
      average: current * 0.9,
      min: current * 0.5,
      max: current * 2,
      p50: current * 0.8,
      p95: current * 1.5,
      p99: current * 1.8,
    };
  }

  async calculateQualityStatistics(
    sessionId: string,
  ): Promise<QualityStatistics> {
    return {
      overall: {
        overall: Math.random() * 20 + 80, // 80-100
        stability: Math.random() * 10 + 90, // 90-100
        consistency: Math.random() * 15 + 85, // 85-100
      },
    };
  }

  async calculateErrorStatistics(sessionId: string): Promise<ErrorStatistics> {
    const total = Math.floor(Math.random() * 50);

    return {
      total,
      rate: total / 1000, // errors per message
      types: {
        network_timeout: Math.floor(total * 0.4),
        routing_failed: Math.floor(total * 0.3),
        compression_error: Math.floor(total * 0.2),
        security_violation: Math.floor(total * 0.1),
      },
      recovery: {
        attempts: total * 2,
        successful: Math.floor(total * 1.8),
        failed: Math.floor(total * 0.2),
        averageTime: Math.random() * 1000 + 500, // 500-1500ms
      },
    };
  }
}

// ==================== SUPPORTING INTERFACES ====================

interface OptimalRoute {
  path: string[];
  hops: number;
  score: number;
  estimatedLatency: number;
  estimatedBandwidth: number;
}

interface CachedRoute {
  route: OptimalRoute;
  timestamp: Date;
  hits: number;
}

interface RouteEntry {
  destination: string;
  nextHop: string;
  cost: number;
  metric: string;
}

interface NetworkNode {
  id: string;
  type: "agent" | "relay" | "gateway";
  capabilities: {
    bandwidth: number;
    latency: number;
    reliability: number;
  };
  status: "active" | "inactive" | "degraded";
}

interface NetworkLink {
  id: string;
  sourceId: string;
  targetId: string;
  bandwidth: number;
  latency: number;
  reliability: number;
  status: "active" | "inactive" | "congested";
}

interface NetworkPath {
  nodes: string[];
  links: NetworkLink[];
  totalLatency: number;
  minBandwidth: number;
  reliability: number;
}

interface StreamMetrics {
  bandwidth: {
    current: number;
    average: number;
    peak: number;
  };
  latency: {
    current: number;
    average: number;
    min: number;
    max: number;
  };
  packetLoss: number;
  jitter: number;
  quality: number;
}

interface PersistedSessionData {
  sessionId: string;
  type: any;
  participants: any[];
  configuration: any;
  state: any;
  statistics: any;
  synchronization: any;
  timestamp: Date;
}