@clduab11/gemini-flow/src/streaming/a2a-multimedia-extension.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 Protocol Multimedia Extension
 *
 * Extends the Agent-to-Agent protocol for multimedia coordination:
 * - Multi-agent streaming coordination
 * - Distributed load balancing
 * - Consensus-based quality decisions
 * - Cross-agent synchronization
 * - Fault-tolerant streaming
 */

import { EventEmitter } from "events";
import { Logger } from "../utils/logger.js";
import {
  A2AMultimediaExtension,
  StreamingSession,
  MultiModalChunk,
  VideoStreamRequest,
  AudioStreamRequest,
  NetworkConditions,
  PerformanceMetrics,
} from "../types/streaming.js";

export interface A2AStreamingAgent {
  id: string;
  role: "producer" | "consumer" | "relay" | "coordinator";
  capabilities: {
    maxStreams: number;
    supportedCodecs: string[];
    bandwidth: { upload: number; download: number };
    processing: { cpu: number; memory: number };
    geographic: { region: string; latency: number };
  };
  currentLoad: {
    activeStreams: number;
    cpuUsage: number;
    memoryUsage: number;
    bandwidthUsage: { upload: number; download: number };
  };
  status: "online" | "offline" | "degraded" | "maintenance";
  lastHeartbeat: number;
}

export interface A2AMultimediaMessage {
  type:
    | "stream_request"
    | "stream_response"
    | "quality_change"
    | "sync_command"
    | "load_balance"
    | "failover"
    | "consensus_vote"
    | "heartbeat"
    | "coordination";
  from: string;
  to: string | "broadcast";
  sessionId: string;
  timestamp: number;
  sequence: number;
  data: any;
  priority: "low" | "medium" | "high" | "critical";
  reliability: "best_effort" | "reliable" | "ordered";
}

export interface ConsensusProposal {
  id: string;
  type:
    | "quality_change"
    | "load_redistribution"
    | "failover"
    | "sync_adjustment";
  proposer: string;
  data: any;
  votes: Map<string, boolean>;
  threshold: number;
  deadline: number;
  status: "pending" | "approved" | "rejected" | "expired";
}

export interface LoadBalancingStrategy {
  algorithm:
    | "round_robin"
    | "least_loaded"
    | "geographic"
    | "capability_based"
    | "adaptive";
  parameters: {
    maxLoadPerAgent: number;
    geographicPreference: boolean;
    capabilityWeighting: number;
    latencyThreshold: number;
  };
  rebalanceInterval: number;
  hysteresis: number; // Prevent oscillation
}

export class A2AMultimediaExtension extends EventEmitter {
  private logger: Logger;
  private extension: A2AMultimediaExtension;
  private agents = new Map<string, A2AStreamingAgent>();
  private sessions = new Map<string, StreamingSession>();
  private messageQueue: A2AMultimediaMessage[] = [];
  private consensusProposals = new Map<string, ConsensusProposal>();
  private loadBalancer: MultimediaLoadBalancer;
  private consensusManager: ConsensusManager;
  private syncCoordinator: SyncCoordinator;
  private failoverManager: FailoverManager;
  private messageRouter: MessageRouter;

  constructor(config: any) {
    super();
    this.logger = new Logger("A2AMultimediaExtension");

    this.extension = {
      version: "1.0.0",
      capabilities: {
        videoStreaming: true,
        audioStreaming: true,
        multicast: true,
        recording: true,
        transcoding: true,
        synchronization: true,
      },
      protocols: {
        webrtc: true,
        hls: true,
        dash: true,
        websocket: true,
        custom: ["a2a-stream"],
      },
      quality: {
        adaptiveBitrate: true,
        multipleQualities: true,
        realTimeAdjustment: true,
      },
      coordination: {
        multiAgent: true,
        loadBalancing: true,
        failover: true,
        consensus: true,
      },
    };

    this.loadBalancer = new MultimediaLoadBalancer();
    this.consensusManager = new ConsensusManager();
    this.syncCoordinator = new SyncCoordinator();
    this.failoverManager = new FailoverManager();
    this.messageRouter = new MessageRouter();

    this.setupMessageHandling();
    this.startHeartbeat();
  }

  /**
   * Register a streaming agent in the A2A network
   */
  registerAgent(agent: A2AStreamingAgent): void {
    this.agents.set(agent.id, agent);

    this.logger.info("Agent registered", {
      id: agent.id,
      role: agent.role,
      capabilities: agent.capabilities,
    });

    this.broadcastMessage({
      type: "coordination",
      from: "system",
      to: "broadcast",
      sessionId: "system",
      timestamp: Date.now(),
      sequence: 0,
      data: {
        action: "agent_joined",
        agent: {
          id: agent.id,
          role: agent.role,
          capabilities: agent.capabilities,
        },
      },
      priority: "medium",
      reliability: "reliable",
    });

    this.emit("agent_registered", agent);
  }

  /**
   * Create a coordinated streaming session across multiple agents
   */
  async createCoordinatedSession(
    sessionId: string,
    participants: string[],
    sessionType: "broadcast" | "multicast" | "p2p",
  ): Promise<StreamingSession> {
    // Select optimal agents for the session
    const selectedAgents = await this.selectOptimalAgents(
      participants,
      sessionType,
    );

    if (selectedAgents.length === 0) {
      throw new Error("No suitable agents available for session");
    }

    // Create session with coordination
    const session: StreamingSession = {
      id: sessionId,
      type: sessionType,
      participants: selectedAgents.map((agent) => ({
        id: agent.id,
        role: this.determineRole(agent, sessionType),
        capabilities: Object.keys(agent.capabilities.supportedCodecs),
        connection: null as any, // Will be set during connection
      })),
      streams: {
        video: [],
        audio: [],
        data: [],
      },
      coordination: {
        master: this.selectMasterAgent(selectedAgents),
        consensus: true,
        synchronization: {
          enabled: true,
          tolerance: 50,
          maxDrift: 200,
          resyncThreshold: 500,
          method: "rtp",
          masterClock: "audio",
        },
      },
      metrics: {
        startTime: Date.now(),
        duration: 0,
        totalBytes: 0,
        qualityChanges: 0,
        errors: 0,
        averageLatency: 0,
      },
    };

    this.sessions.set(sessionId, session);

    // Notify all participants
    await this.coordinateSessionSetup(session);

    this.emit("session_created", session);
    return session;
  }

  /**
   * Request streaming through A2A coordination
   */
  async requestStream(
    request: VideoStreamRequest | AudioStreamRequest,
    sessionId: string,
  ): Promise<void> {
    const session = this.sessions.get(sessionId);
    if (!session) {
      throw new Error(`Session not found: ${sessionId}`);
    }

    // Find optimal agent for the stream
    const optimalAgent = await this.loadBalancer.selectAgent(
      Array.from(this.agents.values()),
      request,
      session,
    );

    if (!optimalAgent) {
      throw new Error("No suitable agent available for stream");
    }

    // Send stream request to selected agent
    const message: A2AMultimediaMessage = {
      type: "stream_request",
      from: "coordinator",
      to: optimalAgent.id,
      sessionId,
      timestamp: Date.now(),
      sequence: this.getNextSequence(),
      data: request,
      priority: "high",
      reliability: "reliable",
    };

    await this.sendMessage(message);

    this.emit("stream_requested", { request, agent: optimalAgent, session });
  }

  /**
   * Coordinate quality change across all agents
   */
  async coordinateQualityChange(
    sessionId: string,
    newQuality: any,
    reason: string,
  ): Promise<boolean> {
    const session = this.sessions.get(sessionId);
    if (!session) {
      return false;
    }

    // Create consensus proposal
    const proposal: ConsensusProposal = {
      id: this.generateProposalId(),
      type: "quality_change",
      proposer: session.coordination.master,
      data: { newQuality, reason },
      votes: new Map(),
      threshold: Math.ceil(session.participants.length / 2), // Majority
      deadline: Date.now() + 5000, // 5 seconds to vote
      status: "pending",
    };

    this.consensusProposals.set(proposal.id, proposal);

    // Request votes from all participants
    const voteMessage: A2AMultimediaMessage = {
      type: "consensus_vote",
      from: session.coordination.master,
      to: "broadcast",
      sessionId,
      timestamp: Date.now(),
      sequence: this.getNextSequence(),
      data: {
        proposal: proposal.id,
        type: "quality_change",
        currentQuality: session.streams.video[0]?.quality,
        proposedQuality: newQuality,
        reason,
      },
      priority: "high",
      reliability: "reliable",
    };

    await this.broadcastToSession(sessionId, voteMessage);

    // Wait for consensus or timeout
    return new Promise((resolve) => {
      const checkInterval = setInterval(() => {
        const updatedProposal = this.consensusProposals.get(proposal.id);
        if (updatedProposal && updatedProposal.status !== "pending") {
          clearInterval(checkInterval);
          resolve(updatedProposal.status === "approved");
        }
      }, 100);

      // Timeout after deadline
      setTimeout(() => {
        clearInterval(checkInterval);
        const finalProposal = this.consensusProposals.get(proposal.id);
        if (finalProposal && finalProposal.status === "pending") {
          finalProposal.status = "expired";
          resolve(false);
        }
      }, 6000);
    });
  }

  /**
   * Handle agent failure and coordinate failover
   */
  async handleAgentFailure(failedAgentId: string): Promise<void> {
    const failedAgent = this.agents.get(failedAgentId);
    if (!failedAgent) return;

    this.logger.warn("Agent failure detected", { agentId: failedAgentId });

    // Mark agent as offline
    failedAgent.status = "offline";

    // Find affected sessions
    const affectedSessions = Array.from(this.sessions.values()).filter(
      (session) => session.participants.some((p) => p.id === failedAgentId),
    );

    // Coordinate failover for each affected session
    for (const session of affectedSessions) {
      await this.coordinateFailover(session, failedAgentId);
    }

    this.emit("agent_failure_handled", {
      failedAgentId,
      affectedSessions: affectedSessions.length,
    });
  }

  /**
   * Synchronize streams across multiple agents
   */
  async synchronizeMultiAgentStreams(
    sessionId: string,
    referenceTime: number,
  ): Promise<boolean> {
    const session = this.sessions.get(sessionId);
    if (!session) return false;

    const syncMessage: A2AMultimediaMessage = {
      type: "sync_command",
      from: session.coordination.master,
      to: "broadcast",
      sessionId,
      timestamp: Date.now(),
      sequence: this.getNextSequence(),
      data: {
        referenceTime,
        tolerance: session.coordination.synchronization.tolerance,
        method: session.coordination.synchronization.method,
      },
      priority: "critical",
      reliability: "ordered",
    };

    await this.broadcastToSession(sessionId, syncMessage);

    // Monitor synchronization accuracy
    return this.syncCoordinator.verifySynchronization(session, referenceTime);
  }

  /**
   * Rebalance load across agents
   */
  async rebalanceLoad(strategy?: LoadBalancingStrategy): Promise<void> {
    const currentStrategy = strategy || this.loadBalancer.getStrategy();

    const rebalancePlan = await this.loadBalancer.createRebalancePlan(
      Array.from(this.agents.values()),
      Array.from(this.sessions.values()),
      currentStrategy,
    );

    if (rebalancePlan.actions.length === 0) {
      this.logger.debug("No rebalancing needed");
      return;
    }

    // Execute rebalancing actions
    for (const action of rebalancePlan.actions) {
      await this.executeRebalanceAction(action);
    }

    this.emit("load_rebalanced", rebalancePlan);
  }

  /**
   * Get network topology for multimedia routing
   */
  getNetworkTopology(): any {
    const topology = {
      agents: Array.from(this.agents.values()).map((agent) => ({
        id: agent.id,
        role: agent.role,
        status: agent.status,
        load: this.calculateAgentLoad(agent),
        geographic: agent.capabilities.geographic,
      })),
      sessions: Array.from(this.sessions.values()).map((session) => ({
        id: session.id,
        type: session.type,
        participants: session.participants.length,
        master: session.coordination.master,
        streams: {
          video: session.streams.video.length,
          audio: session.streams.audio.length,
          data: session.streams.data.length,
        },
      })),
      connections: this.getConnectionMatrix(),
      performance: this.getOverallPerformanceMetrics(),
    };

    return topology;
  }

  /**
   * Setup message handling
   */
  private setupMessageHandling(): void {
    this.messageRouter.on(
      "message_received",
      (message: A2AMultimediaMessage) => {
        this.handleIncomingMessage(message);
      },
    );

    this.messageRouter.on("message_failed", (error: any) => {
      this.logger.error("Message delivery failed", error);
    });
  }

  /**
   * Handle incoming A2A multimedia messages
   */
  private async handleIncomingMessage(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    try {
      switch (message.type) {
        case "stream_request":
          await this.handleStreamRequest(message);
          break;
        case "stream_response":
          await this.handleStreamResponse(message);
          break;
        case "quality_change":
          await this.handleQualityChange(message);
          break;
        case "sync_command":
          await this.handleSyncCommand(message);
          break;
        case "load_balance":
          await this.handleLoadBalance(message);
          break;
        case "failover":
          await this.handleFailover(message);
          break;
        case "consensus_vote":
          await this.handleConsensusVote(message);
          break;
        case "heartbeat":
          await this.handleHeartbeat(message);
          break;
        case "coordination":
          await this.handleCoordination(message);
          break;
        default:
          this.logger.warn("Unknown message type", { type: message.type });
      }
    } catch (error) {
      this.logger.error("Message handling failed", {
        message: message.type,
        error: (error as Error).message,
      });
    }
  }

  /**
   * Select optimal agents for a session
   */
  private async selectOptimalAgents(
    participants: string[],
    sessionType: string,
  ): Promise<A2AStreamingAgent[]> {
    const availableAgents = Array.from(this.agents.values())
      .filter((agent) => agent.status === "online")
      .filter(
        (agent) => participants.length === 0 || participants.includes(agent.id),
      );

    // Sort by suitability score
    const scoredAgents = availableAgents
      .map((agent) => ({
        agent,
        score: this.calculateAgentScore(agent, sessionType),
      }))
      .sort((a, b) => b.score - a.score);

    return scoredAgents
      .slice(0, Math.min(participants.length || 10, scoredAgents.length))
      .map((scored) => scored.agent);
  }

  /**
   * Calculate agent suitability score
   */
  private calculateAgentScore(
    agent: A2AStreamingAgent,
    sessionType: string,
  ): number {
    let score = 0;

    // Load factor (lower load = higher score)
    const loadFactor = 1 - agent.currentLoad.cpuUsage / 100;
    score += loadFactor * 30;

    // Capability factor
    const capabilityFactor = agent.capabilities.maxStreams / 10;
    score += capabilityFactor * 20;

    // Geographic factor (lower latency = higher score)
    const geoFactor = Math.max(
      0,
      1 - agent.capabilities.geographic.latency / 1000,
    );
    score += geoFactor * 15;

    // Bandwidth factor
    const bandwidthFactor = Math.min(
      1,
      agent.capabilities.bandwidth.upload / 10000000,
    ); // 10 Mbps reference
    score += bandwidthFactor * 25;

    // Status factor
    if (agent.status === "online") score += 10;

    return score;
  }

  /**
   * Determine agent role in session
   */
  private determineRole(
    agent: A2AStreamingAgent,
    sessionType: string,
  ): "producer" | "consumer" | "prosumer" {
    if (sessionType === "broadcast") {
      return agent.capabilities.bandwidth.upload >
        agent.capabilities.bandwidth.download
        ? "producer"
        : "consumer";
    }
    return "prosumer"; // Can both produce and consume
  }

  /**
   * Select master agent for coordination
   */
  private selectMasterAgent(agents: A2AStreamingAgent[]): string {
    // Select agent with highest score and stable connection
    const masterCandidate = agents
      .filter((agent) => agent.status === "online")
      .sort(
        (a, b) =>
          this.calculateAgentScore(b, "coordination") -
          this.calculateAgentScore(a, "coordination"),
      )[0];

    return masterCandidate?.id || agents[0]?.id || "unknown";
  }

  /**
   * Coordinate session setup with all participants
   */
  private async coordinateSessionSetup(
    session: StreamingSession,
  ): Promise<void> {
    const setupMessage: A2AMultimediaMessage = {
      type: "coordination",
      from: "coordinator",
      to: "broadcast",
      sessionId: session.id,
      timestamp: Date.now(),
      sequence: this.getNextSequence(),
      data: {
        action: "session_setup",
        session: {
          id: session.id,
          type: session.type,
          participants: session.participants,
          coordination: session.coordination,
        },
      },
      priority: "high",
      reliability: "reliable",
    };

    await this.broadcastToSession(session.id, setupMessage);
  }

  /**
   * Send message to specific agent or broadcast
   */
  private async sendMessage(message: A2AMultimediaMessage): Promise<void> {
    await this.messageRouter.sendMessage(message);
  }

  /**
   * Broadcast message to all participants in session
   */
  private async broadcastToSession(
    sessionId: string,
    message: A2AMultimediaMessage,
  ): Promise<void> {
    const session = this.sessions.get(sessionId);
    if (!session) return;

    for (const participant of session.participants) {
      const participantMessage = {
        ...message,
        to: participant.id,
      };
      await this.sendMessage(participantMessage);
    }
  }

  /**
   * Broadcast message to all agents
   */
  private async broadcastMessage(message: A2AMultimediaMessage): Promise<void> {
    for (const [agentId] of this.agents) {
      const agentMessage = {
        ...message,
        to: agentId,
      };
      await this.sendMessage(agentMessage);
    }
  }

  /**
   * Handle stream request message
   */
  private async handleStreamRequest(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Process stream request and respond
    this.emit("stream_request_received", message);
  }

  /**
   * Handle stream response message
   */
  private async handleStreamResponse(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Process stream response
    this.emit("stream_response_received", message);
  }

  /**
   * Handle quality change message
   */
  private async handleQualityChange(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Apply quality change
    this.emit("quality_change_received", message);
  }

  /**
   * Handle sync command message
   */
  private async handleSyncCommand(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Execute synchronization
    this.emit("sync_command_received", message);
  }

  /**
   * Handle load balance message
   */
  private async handleLoadBalance(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Process load balancing request
    this.emit("load_balance_received", message);
  }

  /**
   * Handle failover message
   */
  private async handleFailover(message: A2AMultimediaMessage): Promise<void> {
    // Process failover coordination
    this.emit("failover_received", message);
  }

  /**
   * Handle consensus vote message
   */
  private async handleConsensusVote(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    const { proposal, vote } = message.data;
    const proposalObj = this.consensusProposals.get(proposal);

    if (proposalObj && proposalObj.status === "pending") {
      proposalObj.votes.set(message.from, vote);

      // Check if threshold reached
      const positiveVotes = Array.from(proposalObj.votes.values()).filter(
        (v) => v,
      ).length;
      if (positiveVotes >= proposalObj.threshold) {
        proposalObj.status = "approved";
        this.emit("consensus_reached", proposalObj);
      } else if (
        proposalObj.votes.size === this.agents.size &&
        positiveVotes < proposalObj.threshold
      ) {
        proposalObj.status = "rejected";
        this.emit("consensus_rejected", proposalObj);
      }
    }
  }

  /**
   * Handle heartbeat message
   */
  private async handleHeartbeat(message: A2AMultimediaMessage): Promise<void> {
    const agent = this.agents.get(message.from);
    if (agent) {
      agent.lastHeartbeat = Date.now();
      agent.currentLoad = message.data.load;
    }
  }

  /**
   * Handle coordination message
   */
  private async handleCoordination(
    message: A2AMultimediaMessage,
  ): Promise<void> {
    // Process coordination commands
    this.emit("coordination_received", message);
  }

  /**
   * Coordinate failover for a session
   */
  private async coordinateFailover(
    session: StreamingSession,
    failedAgentId: string,
  ): Promise<void> {
    const failoverPlan = await this.failoverManager.createFailoverPlan(
      session,
      failedAgentId,
      this.agents,
    );

    if (failoverPlan.replacementAgent) {
      // Execute failover
      await this.executeFailover(
        session,
        failedAgentId,
        failoverPlan.replacementAgent,
      );
    } else {
      // No replacement available, gracefully degrade
      await this.degradeSession(session, failedAgentId);
    }
  }

  /**
   * Execute failover action
   */
  private async executeFailover(
    session: StreamingSession,
    failedAgentId: string,
    replacementAgent: A2AStreamingAgent,
  ): Promise<void> {
    // Update session participants
    const participantIndex = session.participants.findIndex(
      (p) => p.id === failedAgentId,
    );
    if (participantIndex !== -1) {
      session.participants[participantIndex] = {
        id: replacementAgent.id,
        role: session.participants[participantIndex].role,
        capabilities: Object.keys(
          replacementAgent.capabilities.supportedCodecs,
        ),
        connection: null as any,
      };
    }

    // Notify all participants about failover
    const failoverMessage: A2AMultimediaMessage = {
      type: "failover",
      from: session.coordination.master,
      to: "broadcast",
      sessionId: session.id,
      timestamp: Date.now(),
      sequence: this.getNextSequence(),
      data: {
        failedAgent: failedAgentId,
        replacementAgent: replacementAgent.id,
        action: "agent_replacement",
      },
      priority: "critical",
      reliability: "reliable",
    };

    await this.broadcastToSession(session.id, failoverMessage);

    this.emit("failover_executed", {
      session,
      failedAgentId,
      replacementAgent,
    });
  }

  /**
   * Degrade session when no replacement available
   */
  private async degradeSession(
    session: StreamingSession,
    failedAgentId: string,
  ): Promise<void> {
    // Remove failed agent from session
    session.participants = session.participants.filter(
      (p) => p.id !== failedAgentId,
    );

    // Adjust quality if needed
    // Implementation would adjust stream quality based on reduced capacity

    this.emit("session_degraded", { session, failedAgentId });
  }

  /**
   * Execute rebalance action
   */
  private async executeRebalanceAction(action: any): Promise<void> {
    // Implementation would execute specific rebalancing actions
    this.emit("rebalance_action_executed", action);
  }

  /**
   * Calculate agent load
   */
  private calculateAgentLoad(agent: A2AStreamingAgent): number {
    const cpuLoad = agent.currentLoad.cpuUsage / 100;
    const memoryLoad = agent.currentLoad.memoryUsage / 100;
    const streamLoad =
      agent.currentLoad.activeStreams / agent.capabilities.maxStreams;

    return (cpuLoad + memoryLoad + streamLoad) / 3;
  }

  /**
   * Get connection matrix between agents
   */
  private getConnectionMatrix(): any {
    // Implementation would return connection latencies between agents
    return {};
  }

  /**
   * Get overall performance metrics
   */
  private getOverallPerformanceMetrics(): PerformanceMetrics {
    // Implementation would aggregate performance metrics
    return {} as PerformanceMetrics;
  }

  /**
   * Start heartbeat mechanism
   */
  private startHeartbeat(): void {
    setInterval(() => {
      this.checkAgentHealth();
    }, 30000); // Check every 30 seconds
  }

  /**
   * Check health of all agents
   */
  private checkAgentHealth(): void {
    const now = Date.now();
    const heartbeatTimeout = 60000; // 60 seconds

    for (const [agentId, agent] of this.agents) {
      if (
        now - agent.lastHeartbeat > heartbeatTimeout &&
        agent.status === "online"
      ) {
        agent.status = "offline";
        this.handleAgentFailure(agentId);
      }
    }
  }

  /**
   * Generate unique proposal ID
   */
  private generateProposalId(): string {
    return `proposal-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
  }

  /**
   * Get next sequence number
   */
  private getNextSequence(): number {
    return Date.now(); // Simple sequence based on timestamp
  }

  /**
   * Clean up resources
   */
  cleanup(): void {
    this.agents.clear();
    this.sessions.clear();
    this.consensusProposals.clear();
    this.messageQueue = [];
    this.removeAllListeners();

    this.logger.info("A2A multimedia extension cleaned up");
  }
}

/**
 * Multimedia load balancer
 */
class MultimediaLoadBalancer {
  private strategy: LoadBalancingStrategy = {
    algorithm: "adaptive",
    parameters: {
      maxLoadPerAgent: 0.8,
      geographicPreference: true,
      capabilityWeighting: 0.3,
      latencyThreshold: 100,
    },
    rebalanceInterval: 60000,
    hysteresis: 0.1,
  };

  async selectAgent(
    agents: A2AStreamingAgent[],
    request: any,
    session: StreamingSession,
  ): Promise<A2AStreamingAgent | null> {
    // Implementation would select optimal agent based on strategy
    return agents.find((agent) => agent.status === "online") || null;
  }

  async createRebalancePlan(
    agents: A2AStreamingAgent[],
    sessions: StreamingSession[],
    strategy: LoadBalancingStrategy,
  ): Promise<{ actions: any[] }> {
    // Implementation would create rebalancing plan
    return { actions: [] };
  }

  getStrategy(): LoadBalancingStrategy {
    return this.strategy;
  }
}

/**
 * Consensus manager for distributed decisions
 */
class ConsensusManager {
  // Implementation for consensus mechanisms
}

/**
 * Synchronization coordinator
 */
class SyncCoordinator {
  async verifySynchronization(
    session: StreamingSession,
    referenceTime: number,
  ): Promise<boolean> {
    // Implementation would verify synchronization across agents
    return true;
  }
}

/**
 * Failover manager
 */
class FailoverManager {
  async createFailoverPlan(
    session: StreamingSession,
    failedAgentId: string,
    agents: Map<string, A2AStreamingAgent>,
  ): Promise<{ replacementAgent: A2AStreamingAgent | null }> {
    // Implementation would create failover plan
    const availableAgents = Array.from(agents.values()).filter(
      (agent) => agent.status === "online" && agent.id !== failedAgentId,
    );

    return { replacementAgent: availableAgents[0] || null };
  }
}

/**
 * Message router for A2A communication
 */
class MessageRouter extends EventEmitter {
  async sendMessage(message: A2AMultimediaMessage): Promise<void> {
    // Implementation would route message to destination
    this.emit("message_sent", message);
  }
}