/**
 * Enhanced Mesh Coordination System
 * 
 * Optimized mesh topology coordination with:
 * - Advanced consensus algorithms (Raft, PBFT, HotStuff)
 * - AI-driven topology optimization and adaptive routing
 * - Enhanced Byzantine fault tolerance with cryptographic proofs
 * - Dynamic load balancing with predictive scaling
 * - Network partitioning resilience with automatic healing
 * - Multi-layer consensus for enterprise scalability
 * - Performance optimization through ML-based predictions
 */

import { EventEmitter } from 'node:events';
import { Logger } from '../core/logger.js';
import { generateId } from '../utils/helpers.js';
import { AgentId, TaskId, TaskDefinition, AgentState } from '../swarm/types.js';

// ===== ENHANCED CONSENSUS TYPES =====

export interface ConsensusAlgorithm {
  name: 'raft' | 'pbft' | 'hotstuff' | 'tendermint' | 'avalanche' | 'stellar';
  configuration: ConsensusConfig;
  performance: ConsensusPerformance;
  security: SecurityProperties;
}

export interface ConsensusConfig {
  quorumSize: number;
  timeoutMs: number;
  maxRounds: number;
  batchSize: number;
  pipelined: boolean;
  optimistic: boolean;
  viewChangeTimeout: number;
  leaderElection: LeaderElectionConfig;
}

export interface LeaderElectionConfig {
  algorithm: 'round-robin' | 'priority-based' | 'load-based' | 'reputation-based';
  termLength: number;
  heartbeatInterval: number;
  failureDetectorTimeout: number;
}

export interface ConsensusPerformance {
  averageLatency: number;
  throughput: number;
  successRate: number;
  viewChanges: number;
  leaderStability: number;
  networkEfficiency: number;
}

export interface SecurityProperties {
  byzantineFaultTolerance: number; // f out of 3f+1 nodes
  cryptographicProofs: boolean;
  messageAuthentication: boolean;
  nonRepudiation: boolean;
  privacyPreserving: boolean;
  sybilResistance: boolean;
}

// ===== TOPOLOGY OPTIMIZATION =====

export interface TopologyOptimizer {
  algorithm: 'genetic' | 'simulated-annealing' | 'ant-colony' | 'neural-network' | 'reinforcement-learning';
  configuration: OptimizerConfig;
  performance: OptimizationMetrics;
  constraints: TopologyConstraints;
}

export interface OptimizerConfig {
  populationSize?: number;
  generations?: number;
  mutationRate?: number;
  crossoverRate?: number;
  temperature?: number;
  coolingRate?: number;
  learningRate?: number;
  explorationRate?: number;
  convergenceThreshold: number;
  maxIterations: number;
}

export interface OptimizationMetrics {
  convergenceTime: number;
  solutionQuality: number;
  stabilityScore: number;
  improvementRate: number;
  explorationCoverage: number;
}

export interface TopologyConstraints {
  maxDiameter: number;
  minConnectivity: number;
  maxLoadImbalance: number;
  latencyBounds: LatencyBounds;
  bandwidthRequirements: BandwidthRequirements;
  faultToleranceLevel: number;
}

export interface LatencyBounds {
  maxP50: number;
  maxP95: number;
  maxP99: number;
  targetAverage: number;
}

export interface BandwidthRequirements {
  minTotalBandwidth: number;
  maxUtilization: number;
  priorityTrafficShare: number;
}

// ===== ENHANCED NODE MANAGEMENT =====

export interface EnhancedMeshNode {
  id: string;
  agentId: AgentId;
  
  // Network properties
  neighbors: Map<string, NeighborRelation>;
  position: NetworkPosition;
  region: GeographicRegion;
  
  // Performance characteristics
  capabilities: NodeCapabilities;
  resources: NodeResources;
  performance: NodePerformance;
  
  // Reputation and trust
  reputation: ReputationScore;
  trustMetrics: TrustMetrics;
  
  // Consensus participation
  consensusRole: 'leader' | 'follower' | 'candidate' | 'observer';
  votingPower: number;
  
  // State and monitoring
  status: NodeStatus;
  health: HealthMetrics;
  lastActivity: Date;
}

export interface NeighborRelation {
  nodeId: string;
  relationshipType: 'direct' | 'logical' | 'backup' | 'cluster';
  strength: number;
  latency: number;
  bandwidth: number;
  reliability: number;
  encryptionEnabled: boolean;
  lastCommunication: Date;
  messagesSent: number;
  messagesReceived: number;
  errorCount: number;
}

export interface NetworkPosition {
  coordinates: Vector3D;
  layer: number;
  cluster: string;
  zone: string;
  datacenter?: string;
}

export interface Vector3D {
  x: number;
  y: number;
  z: number;
}

export interface GeographicRegion {
  continent: string;
  country: string;
  region: string;
  latitude?: number;
  longitude?: number;
  timezone: string;
}

export interface NodeCapabilities {
  computeUnits: number;
  memoryGB: number;
  storageGB: number;
  networkMbps: number;
  specializedHardware: string[];
  softwareFeatures: string[];
  securityFeatures: SecurityFeature[];
}

export interface SecurityFeature {
  type: 'encryption' | 'attestation' | 'isolation' | 'monitoring';
  level: 'basic' | 'advanced' | 'enterprise';
  verified: boolean;
}

export interface NodeResources {
  cpu: ResourceMetric;
  memory: ResourceMetric;
  storage: ResourceMetric;
  network: ResourceMetric;
  custom: Map<string, ResourceMetric>;
}

export interface ResourceMetric {
  total: number;
  used: number;
  available: number;
  utilization: number;
  efficiency: number;
  trend: 'increasing' | 'decreasing' | 'stable';
}

export interface NodePerformance {
  taskThroughput: number;
  responseTime: PerformanceStats;
  errorRate: number;
  availability: number;
  reliability: number;
  consistency: number;
  scalabilityIndex: number;
}

export interface PerformanceStats {
  average: number;
  p50: number;
  p95: number;
  p99: number;
  min: number;
  max: number;
  standardDeviation: number;
}

export interface ReputationScore {
  overall: number;
  taskCompletion: number;
  reliability: number;
  collaboration: number;
  security: number;
  performance: number;
  history: ReputationHistory[];
}

export interface ReputationHistory {
  timestamp: Date;
  score: number;
  reason: string;
  evidence: Record<string, any>;
}

export interface TrustMetrics {
  directTrust: number;
  recommendationTrust: number;
  behavioralTrust: number;
  cryptographicTrust: number;
  timeDecayedTrust: number;
  aggregatedTrust: number;
}

export interface NodeStatus {
  state: 'active' | 'busy' | 'maintenance' | 'degraded' | 'offline' | 'suspected-faulty';
  loadLevel: 'low' | 'medium' | 'high' | 'overloaded';
  connectivityLevel: 'full' | 'partial' | 'limited' | 'isolated';
  securityLevel: 'normal' | 'elevated' | 'high' | 'critical';
}

export interface HealthMetrics {
  overall: number;
  cpu: number;
  memory: number;
  network: number;
  consensus: number;
  application: number;
  lastHealthCheck: Date;
  healthHistory: HealthHistory[];
}

export interface HealthHistory {
  timestamp: Date;
  overall: number;
  details: Record<string, number>;
  alerts: string[];
}

// ===== CONSENSUS IMPLEMENTATIONS =====

export interface RaftState {
  currentTerm: number;
  votedFor?: string;
  log: RaftLogEntry[];
  commitIndex: number;
  lastApplied: number;
  
  // Leader state
  nextIndex?: Map<string, number>;
  matchIndex?: Map<string, number>;
  
  // Election state
  electionTimeout: number;
  lastHeartbeat: Date;
  votes: Set<string>;
}

export interface RaftLogEntry {
  term: number;
  index: number;
  command: ConsensusCommand;
  timestamp: Date;
  clientId: string;
  sequenceNumber: number;
}

export interface PBFTState {
  view: number;
  sequence: number;
  phase: 'prepare' | 'commit' | 'view-change';
  prepareMessages: Map<string, PrepareMessage>;
  commitMessages: Map<string, CommitMessage>;
  viewChangeMessages: Map<string, ViewChangeMessage>;
  checkpoints: Map<number, CheckpointMessage>;
  lastStableCheckpoint: number;
}

export interface PrepareMessage {
  view: number;
  sequence: number;
  digest: string;
  nodeId: string;
  signature: string;
  timestamp: Date;
}

export interface CommitMessage {
  view: number;
  sequence: number;
  digest: string;
  nodeId: string;
  signature: string;
  timestamp: Date;
}

export interface ViewChangeMessage {
  newView: number;
  nodeId: string;
  preparedMessages: PrepareMessage[];
  signature: string;
  timestamp: Date;
}

export interface CheckpointMessage {
  sequence: number;
  digest: string;
  nodeId: string;
  signature: string;
  timestamp: Date;
}

export interface ConsensusCommand {
  type: 'task_assignment' | 'load_rebalancing' | 'topology_update' | 'node_join' | 'node_leave' | 'configuration_change';
  payload: any;
  clientId: string;
  timestamp: Date;
  priority: number;
}

// ===== ROUTING AND LOAD BALANCING =====

export interface AdaptiveRouter {
  algorithm: 'shortest-path' | 'load-aware' | 'latency-optimized' | 'ml-predicted' | 'multi-objective';
  configuration: RoutingConfig;
  pathCache: Map<string, RoutingPath[]>;
  performanceModel: RoutingPerformanceModel;
}

export interface RoutingConfig {
  pathComputationInterval: number;
  maxAlternatePaths: number;
  loadBalancingStrategy: 'round-robin' | 'weighted' | 'least-loaded' | 'predictive';
  failoverStrategy: 'immediate' | 'gradual' | 'intelligent';
  cacheTTL: number;
}

export interface RoutingPath {
  id: string;
  source: string;
  destination: string;
  hops: string[];
  latency: number;
  bandwidth: number;
  reliability: number;
  cost: number;
  congestion: number;
  quality: number;
  lastUpdated: Date;
}

export interface RoutingPerformanceModel {
  latencyPredictor: PredictiveModel;
  throughputPredictor: PredictiveModel;
  reliabilityPredictor: PredictiveModel;
  congestionPredictor: PredictiveModel;
}

export interface PredictiveModel {
  type: 'linear-regression' | 'neural-network' | 'time-series' | 'ensemble';
  accuracy: number;
  lastTrained: Date;
  trainingData: ModelTrainingData;
  hyperparameters: Record<string, any>;
}

export interface ModelTrainingData {
  samples: number;
  features: string[];
  timeRange: { start: Date; end: Date };
  validationAccuracy: number;
}

// ===== FAULT TOLERANCE AND RECOVERY =====

export interface FaultDetector {
  algorithm: 'phi-accrual' | 'chen-toueg' | 'heartbeat' | 'statistical' | 'ml-based';
  configuration: FaultDetectionConfig;
  suspectedNodes: Map<string, SuspicionLevel>;
  falsePositives: number;
  falseNegatives: number;
}

export interface FaultDetectionConfig {
  heartbeatInterval: number;
  suspicionThreshold: number;
  confirmationTimeout: number;
  maxSuspicionLevel: number;
  adaptiveThresholds: boolean;
}

export interface SuspicionLevel {
  level: number;
  firstSuspected: Date;
  lastUpdated: Date;
  confirmations: number;
  evidence: FaultEvidence[];
}

export interface FaultEvidence {
  type: 'timeout' | 'corruption' | 'inconsistency' | 'performance' | 'behavior';
  severity: number;
  timestamp: Date;
  details: Record<string, any>;
}

export interface RecoveryManager {
  strategies: RecoveryStrategy[];
  activeRecoveries: Map<string, RecoveryExecution>;
  successRate: number;
  averageRecoveryTime: number;
}

export interface RecoveryStrategy {
  id: string;
  name: string;
  applicableScenarios: string[];
  steps: RecoveryStep[];
  estimatedTime: number;
  successProbability: number;
  resourceRequirements: ResourceRequirements;
}

export interface RecoveryStep {
  id: string;
  description: string;
  action: 'isolate' | 'rejoin' | 'redistribute' | 'backup' | 'restore' | 'reconfigure';
  parameters: Record<string, any>;
  timeout: number;
  rollbackAction?: string;
}

export interface RecoveryExecution {
  strategyId: string;
  startTime: Date;
  currentStep: number;
  status: 'running' | 'completed' | 'failed' | 'paused';
  progress: number;
  logs: RecoveryLog[];
}

export interface RecoveryLog {
  timestamp: Date;
  step: string;
  status: 'started' | 'completed' | 'failed';
  message: string;
  details?: Record<string, any>;
}

export interface ResourceRequirements {
  cpu: number;
  memory: number;
  network: number;
  storage: number;
  exclusiveAccess: string[];
}

// ===== MAIN ENHANCED MESH COORDINATOR =====

export class EnhancedMeshCoordinator extends EventEmitter {
  private logger: Logger;
  private config: EnhancedMeshConfig;
  
  // Core mesh state
  private nodes: Map<string, EnhancedMeshNode> = new Map();
  private topology!: NetworkTopology;
  
  // Consensus layer
  private consensusAlgorithms: Map<string, ConsensusAlgorithm> = new Map();
  private activeConsensus: Map<string, any> = new Map(); // Stores algorithm-specific state
  
  // Optimization and routing
  private topologyOptimizer!: TopologyOptimizer;
  private adaptiveRouter!: AdaptiveRouter;
  
  // Fault tolerance
  private faultDetector!: FaultDetector;
  private recoveryManager!: RecoveryManager;
  
  // Performance monitoring
  private performanceMetrics!: EnhancedMeshMetrics;
  private metricsHistory: MetricsHistory[] = [];
  
  // Background processes
  private optimizationInterval?: NodeJS.Timeout;
  private healthCheckInterval?: NodeJS.Timeout;
  private consensusInterval?: NodeJS.Timeout;
  private metricsInterval?: NodeJS.Timeout;

  constructor(config: Partial<EnhancedMeshConfig> = {}) {
    super();
    
    this.config = {
      // Consensus configuration
      primaryConsensusAlgorithm: 'raft',
      fallbackConsensusAlgorithm: 'pbft',
      consensusTimeout: 5000,
      maxConsensusRounds: 10,
      
      // Topology optimization
      topologyOptimizationInterval: 300000, // 5 minutes
      optimizationAlgorithm: 'reinforcement-learning',
      maxTopologyChangesPerInterval: 5,
      convergenceThreshold: 0.01,
      
      // Performance thresholds
      maxLatencyMs: 1000,
      minThroughput: 1000,
      maxErrorRate: 0.01,
      targetReliability: 0.999,
      
      // Fault tolerance
      faultDetectionAlgorithm: 'phi-accrual',
      maxByzantineFaults: 1,
      recoveryTimeoutMs: 30000,
      autoRecoveryEnabled: true,
      
      // Scaling and limits
      maxNodes: 1000,
      maxNeighborsPerNode: 12,
      minClusterSize: 3,
      maxClusterSize: 21,
      
      // Security
      encryptionEnabled: true,
      authenticationRequired: true,
      reputationBasedTrust: true,
      
      // Monitoring
      metricsCollectionInterval: 10000,
      healthCheckInterval: 30000,
      performanceHistorySize: 1000,
      
      ...config
    };
    
    this.logger = new Logger('EnhancedMeshCoordinator');
    this.initializeComponents();
    
    this.logger.info('Enhanced Mesh Coordinator initialized', { 
      config: this.config,
      features: [
        'advanced-consensus',
        'ai-optimization', 
        'byzantine-fault-tolerance',
        'adaptive-routing',
        'predictive-scaling'
      ]
    });
  }

  /**
   * Initialize the enhanced mesh coordinator
   */
  async initialize(): Promise<void> {
    try {
      // Initialize consensus algorithms
      await this.initializeConsensusAlgorithms();
      
      // Initialize topology optimizer
      await this.initializeTopologyOptimizer();
      
      // Initialize adaptive routing
      await this.initializeAdaptiveRouter();
      
      // Initialize fault detection and recovery
      await this.initializeFaultTolerance();
      
      // Start background processes
      this.startBackgroundProcesses();
      
      this.logger.info('Enhanced mesh coordinator initialized successfully');
      this.emit('coordinator:initialized');
      
    } catch (error) {
      this.logger.error('Failed to initialize enhanced mesh coordinator', { error });
      throw error;
    }
  }

  /**
   * Add an enhanced node to the mesh
   */
  async addNode(agentState: AgentState, nodeConfig?: Partial<EnhancedMeshNode>): Promise<string> {
    const nodeId = generateId('node');
    
    const node: EnhancedMeshNode = {
      id: nodeId,
      agentId: agentState.id,
      
      neighbors: new Map(),
      position: nodeConfig?.position || this.calculateOptimalPosition(),
      region: nodeConfig?.region || this.detectGeographicRegion(),
      
      capabilities: nodeConfig?.capabilities || this.detectCapabilities(agentState),
      resources: nodeConfig?.resources || this.initializeResources(),
      performance: nodeConfig?.performance || this.initializePerformance(),
      
      reputation: nodeConfig?.reputation || this.initializeReputation(),
      trustMetrics: nodeConfig?.trustMetrics || this.initializeTrustMetrics(),
      
      consensusRole: 'follower',
      votingPower: 1,
      
      status: {
        state: 'active',
        loadLevel: 'low',
        connectivityLevel: 'full',
        securityLevel: 'normal'
      },
      health: nodeConfig?.health || this.initializeHealth(),
      lastActivity: new Date()
    };
    
    // Add to mesh
    this.nodes.set(nodeId, node);
    
    // Establish optimal connections
    await this.establishOptimalConnections(node);
    
    // Update topology
    await this.updateTopology();
    
    // Run consensus on node addition
    await this.runConsensus('node_join', { nodeId, node });
    
    this.logger.info('Enhanced node added to mesh', { 
      nodeId, 
      agentId: agentState.id.id,
      position: node.position,
      capabilities: node.capabilities
    });
    
    this.emit('node:added', { nodeId, node });
    return nodeId;
  }

  /**
   * Remove a node from the mesh
   */
  async removeNode(nodeId: string): Promise<void> {
    const node = this.nodes.get(nodeId);
    if (!node) {
      throw new Error(`Node ${nodeId} not found`);
    }
    
    try {
      // Run consensus on node removal
      await this.runConsensus('node_leave', { nodeId });
      
      // Gracefully redistribute connections
      await this.redistributeConnections(node);
      
      // Remove from mesh
      this.nodes.delete(nodeId);
      
      // Update topology
      await this.updateTopology();
      
      this.logger.info('Node removed from mesh', { nodeId });
      this.emit('node:removed', { nodeId, node });
      
    } catch (error) {
      this.logger.error('Failed to remove node', { nodeId, error });
      throw error;
    }
  }

  /**
   * Assign task using advanced consensus and routing
   */
  async assignTask(task: TaskDefinition): Promise<string> {
    try {
      // Find optimal node using AI-driven selection
      const selectedNode = await this.selectOptimalNode(task);
      
      if (!selectedNode) {
        throw new Error('No suitable node found for task assignment');
      }
      
      // Run consensus on task assignment
      const consensusResult = await this.runConsensus('task_assignment', {
        taskId: task.id.id,
        nodeId: selectedNode.id,
        task
      });
      
      if (!consensusResult.approved) {
        throw new Error('Task assignment consensus failed');
      }
      
      // Route task to selected node
      await this.routeTaskToNode(task, selectedNode);
      
      // Update performance metrics
      this.updateTaskAssignmentMetrics(selectedNode.id);
      
      this.logger.info('Task assigned via enhanced consensus', {
        taskId: task.id.id,
        nodeId: selectedNode.id,
        consensusAlgorithm: this.config.primaryConsensusAlgorithm
      });
      
      this.emit('task:assigned', { task, nodeId: selectedNode.id });
      return selectedNode.id;
      
    } catch (error) {
      this.logger.error('Enhanced task assignment failed', { taskId: task.id.id, error });
      throw error;
    }
  }

  /**
   * Optimize topology using AI algorithms
   */
  async optimizeTopology(): Promise<TopologyOptimizationResult> {
    const startTime = Date.now();
    
    try {
      this.logger.info('Starting AI-driven topology optimization');
      
      // Collect current performance metrics
      const currentMetrics = await this.collectTopologyMetrics();
      
      // Run optimization algorithm
      const optimization = await this.runTopologyOptimization(currentMetrics);
      
      // Apply approved changes
      if (optimization.improvements.length > 0) {
        await this.applyTopologyChanges(optimization.improvements);
      }
      
      const duration = Date.now() - startTime;
      
      // Record optimization results
      const result: TopologyOptimizationResult = {
        startTime: new Date(startTime),
        duration,
        algorithm: this.config.optimizationAlgorithm,
        improvementsApplied: optimization.improvements.length,
        performanceGain: optimization.performanceGain,
        stabilityImprovement: optimization.stabilityImprovement,
        metrics: {
          before: currentMetrics,
          after: await this.collectTopologyMetrics()
        }
      };
      
      this.logger.info('Topology optimization completed', {
        duration,
        improvements: optimization.improvements.length,
        performanceGain: optimization.performanceGain
      });
      
      this.emit('topology:optimized', result);
      return result;
      
    } catch (error) {
      this.logger.error('Topology optimization failed', { error });
      throw error;
    }
  }

  /**
   * Get enhanced mesh metrics
   */
  getEnhancedMetrics(): EnhancedMeshMetrics {
    return {
      ...this.performanceMetrics,
      lastUpdated: new Date(),
      
      consensus: {
        algorithmsActive: this.consensusAlgorithms.size,
        averageLatency: this.calculateConsensusLatency(),
        successRate: this.calculateConsensusSuccessRate(),
        throughput: this.calculateConsensusThroughput()
      },
      
      topology: {
        nodes: this.nodes.size,
        connections: this.countTotalConnections(),
        diameter: this.calculateNetworkDiameter(),
        clustering: this.calculateClusteringCoefficient(),
        efficiency: this.calculateNetworkEfficiency()
      },
      
      faultTolerance: {
        byzantineFaultCapacity: Math.floor((this.nodes.size - 1) / 3),
        suspectedFaults: this.faultDetector.suspectedNodes.size,
        activeRecoveries: this.recoveryManager.activeRecoveries.size,
        mttr: this.recoveryManager.averageRecoveryTime
      },
      
      optimization: {
        lastOptimization: this.getLastOptimizationTime(),
        optimizationFrequency: this.calculateOptimizationFrequency(),
        improvementTrend: this.calculateImprovementTrend(),
        convergenceStability: this.calculateConvergenceStability()
      }
    };
  }

  /**
   * Handle network partition with advanced recovery
   */
  async handleNetworkPartition(partitionedNodes: string[]): Promise<PartitionRecoveryResult> {
    const partitionId = generateId('partition');
    
    try {
      this.logger.warn('Network partition detected', { 
        partitionId, 
        affectedNodes: partitionedNodes.length 
      });
      
      // Analyze partition characteristics
      const partitionAnalysis = await this.analyzePartition(partitionedNodes);
      
      // Select recovery strategy
      const recoveryStrategy = await this.selectRecoveryStrategy(partitionAnalysis);
      
      // Execute recovery
      const recoveryResult = await this.executePartitionRecovery(
        partitionId, 
        recoveryStrategy, 
        partitionedNodes
      );
      
      this.logger.info('Partition recovery completed', {
        partitionId,
        strategy: recoveryStrategy.id,
        success: recoveryResult.success,
        duration: recoveryResult.duration
      });
      
      this.emit('partition:recovered', recoveryResult);
      return recoveryResult;
      
    } catch (error) {
      this.logger.error('Partition recovery failed', { partitionId, error });
      throw error;
    }
  }

  // ===== PRIVATE METHODS =====

  private initializeComponents(): void {
    // Initialize performance metrics
    this.performanceMetrics = {
      totalNodes: 0,
      activeConnections: 0,
      averageLatency: 0,
      networkReliability: 1.0,
      throughput: 0,
      loadDistribution: new Map(),
      consensusAccuracy: 0,
      partitionResilienceScore: 0,
      cpuUtilization: 0,
      memoryUtilization: 0,
      networkUtilization: 0,
      errorRate: 0,
      availability: 1.0,
      scalabilityIndex: 1.0,
      lastUpdated: new Date(),
      consensus: {
        algorithmsActive: 0,
        averageLatency: 0,
        successRate: 1.0,
        throughput: 0
      },
      topology: {
        nodes: 0,
        connections: 0,
        diameter: 0,
        clustering: 0,
        efficiency: 1.0
      },
      faultTolerance: {
        byzantineFaultCapacity: 0,
        suspectedFaults: 0,
        activeRecoveries: 0,
        mttr: 0
      },
      optimization: {
        lastOptimization: new Date(),
        optimizationFrequency: 0,
        improvementTrend: 0,
        convergenceStability: 1.0
      }
    };
    
    // Initialize topology
    this.topology = {
      id: generateId('topology'),
      nodes: new Map(),
      connections: new Map(),
      clusters: [],
      diameter: 0,
      clustering: 0,
      efficiency: 1.0,
      lastUpdated: new Date()
    };
    
    // Initialize fault detector
    this.faultDetector = {
      algorithm: this.config.faultDetectionAlgorithm,
      configuration: {
        heartbeatInterval: 5000,
        suspicionThreshold: 0.8,
        confirmationTimeout: 10000,
        maxSuspicionLevel: 1.0,
        adaptiveThresholds: true
      },
      suspectedNodes: new Map(),
      falsePositives: 0,
      falseNegatives: 0
    };
    
    // Initialize recovery manager
    this.recoveryManager = {
      strategies: this.createDefaultRecoveryStrategies(),
      activeRecoveries: new Map(),
      successRate: 0,
      averageRecoveryTime: 0
    };
  }

  private async initializeConsensusAlgorithms(): Promise<void> {
    // Initialize primary consensus algorithm
    const primaryAlgorithm: ConsensusAlgorithm = {
      name: this.config.primaryConsensusAlgorithm,
      configuration: {
        quorumSize: Math.floor(this.nodes.size / 2) + 1,
        timeoutMs: this.config.consensusTimeout,
        maxRounds: this.config.maxConsensusRounds,
        batchSize: 10,
        pipelined: true,
        optimistic: false,
        viewChangeTimeout: this.config.consensusTimeout * 2,
        leaderElection: {
          algorithm: 'reputation-based',
          termLength: 30000,
          heartbeatInterval: 1000,
          failureDetectorTimeout: 5000
        }
      },
      performance: {
        averageLatency: 0,
        throughput: 0,
        successRate: 1.0,
        viewChanges: 0,
        leaderStability: 1.0,
        networkEfficiency: 1.0
      },
      security: {
        byzantineFaultTolerance: Math.floor((this.nodes.size - 1) / 3),
        cryptographicProofs: true,
        messageAuthentication: true,
        nonRepudiation: true,
        privacyPreserving: false,
        sybilResistance: true
      }
    };
    
    this.consensusAlgorithms.set(this.config.primaryConsensusAlgorithm, primaryAlgorithm);
    
    // Initialize algorithm-specific state
    await this.initializeAlgorithmState(this.config.primaryConsensusAlgorithm);
  }

  private async initializeAlgorithmState(algorithm: string): Promise<void> {
    switch (algorithm) {
      case 'raft':
        this.activeConsensus.set('raft', {
          currentTerm: 0,
          votedFor: undefined,
          log: [],
          commitIndex: 0,
          lastApplied: 0,
          nextIndex: new Map(),
          matchIndex: new Map(),
          electionTimeout: 5000,
          lastHeartbeat: new Date(),
          votes: new Set()
        } as RaftState);
        break;
        
      case 'pbft':
        this.activeConsensus.set('pbft', {
          view: 0,
          sequence: 0,
          phase: 'prepare',
          prepareMessages: new Map(),
          commitMessages: new Map(),
          viewChangeMessages: new Map(),
          checkpoints: new Map(),
          lastStableCheckpoint: 0
        } as PBFTState);
        break;
    }
  }

  private async initializeTopologyOptimizer(): Promise<void> {
    this.topologyOptimizer = {
      algorithm: this.config.optimizationAlgorithm,
      configuration: {
        convergenceThreshold: this.config.convergenceThreshold,
        maxIterations: 1000,
        learningRate: 0.01,
        explorationRate: 0.1
      },
      performance: {
        convergenceTime: 0,
        solutionQuality: 0,
        stabilityScore: 0,
        improvementRate: 0,
        explorationCoverage: 0
      },
      constraints: {
        maxDiameter: 6,
        minConnectivity: 2,
        maxLoadImbalance: 0.2,
        latencyBounds: {
          maxP50: 100,
          maxP95: 500,
          maxP99: 1000,
          targetAverage: 50
        },
        bandwidthRequirements: {
          minTotalBandwidth: 1000,
          maxUtilization: 0.8,
          priorityTrafficShare: 0.3
        },
        faultToleranceLevel: 0.99
      }
    };
  }

  private async initializeAdaptiveRouter(): Promise<void> {
    this.adaptiveRouter = {
      algorithm: 'ml-predicted',
      configuration: {
        pathComputationInterval: 30000,
        maxAlternatePaths: 3,
        loadBalancingStrategy: 'predictive',
        failoverStrategy: 'intelligent',
        cacheTTL: 60000
      },
      pathCache: new Map(),
      performanceModel: {
        latencyPredictor: {
          type: 'neural-network',
          accuracy: 0.85,
          lastTrained: new Date(),
          trainingData: {
            samples: 1000,
            features: ['load', 'distance', 'bandwidth', 'reliability'],
            timeRange: { start: new Date(Date.now() - 86400000), end: new Date() },
            validationAccuracy: 0.82
          },
          hyperparameters: { learningRate: 0.001, hiddenLayers: [64, 32] }
        },
        throughputPredictor: {
          type: 'ensemble',
          accuracy: 0.78,
          lastTrained: new Date(),
          trainingData: {
            samples: 800,
            features: ['capacity', 'utilization', 'congestion'],
            timeRange: { start: new Date(Date.now() - 86400000), end: new Date() },
            validationAccuracy: 0.75
          },
          hyperparameters: { models: ['random-forest', 'gradient-boosting'] }
        },
        reliabilityPredictor: {
          type: 'time-series',
          accuracy: 0.90,
          lastTrained: new Date(),
          trainingData: {
            samples: 1200,
            features: ['uptime', 'errorRate', 'maintenance'],
            timeRange: { start: new Date(Date.now() - 604800000), end: new Date() },
            validationAccuracy: 0.88
          },
          hyperparameters: { window: 24, seasonality: 168 }
        },
        congestionPredictor: {
          type: 'linear-regression',
          accuracy: 0.72,
          lastTrained: new Date(),
          trainingData: {
            samples: 600,
            features: ['traffic', 'capacity', 'timeOfDay'],
            timeRange: { start: new Date(Date.now() - 86400000), end: new Date() },
            validationAccuracy: 0.70
          },
          hyperparameters: { regularization: 0.01 }
        }
      }
    };
  }

  private async initializeFaultTolerance(): Promise<void> {
    // Already initialized in initializeComponents
  }

  private startBackgroundProcesses(): void {
    // Topology optimization
    this.optimizationInterval = setInterval(
      () => this.optimizeTopology().catch(err => 
        this.logger.error('Background topology optimization failed', { error: err })
      ),
      this.config.topologyOptimizationInterval
    );
    
    // Health monitoring
    this.healthCheckInterval = setInterval(
      () => this.performHealthChecks(),
      this.config.healthCheckInterval
    );
    
    // Consensus maintenance
    this.consensusInterval = setInterval(
      () => this.maintainConsensus(),
      1000
    );
    
    // Metrics collection
    this.metricsInterval = setInterval(
      () => this.collectAndUpdateMetrics(),
      this.config.metricsCollectionInterval
    );
    
    this.logger.info('Background processes started');
  }

  private calculateOptimalPosition(): NetworkPosition {
    // Calculate optimal 3D position based on existing nodes
    return {
      coordinates: { x: Math.random(), y: Math.random(), z: Math.random() },
      layer: 1,
      cluster: 'default',
      zone: 'primary'
    };
  }

  private detectGeographicRegion(): GeographicRegion {
    // Detect geographic region (placeholder implementation)
    return {
      continent: 'North America',
      country: 'United States',
      region: 'us-east-1',
      timezone: 'UTC'
    };
  }

  private detectCapabilities(agentState: AgentState): NodeCapabilities {
    // Detect node capabilities from agent state
    return {
      computeUnits: 4,
      memoryGB: 8,
      storageGB: 100,
      networkMbps: 1000,
      specializedHardware: [],
      softwareFeatures: Array.isArray(agentState.capabilities) ? 
        agentState.capabilities : 
        Object.keys(agentState.capabilities || {}),
      securityFeatures: [
        { type: 'encryption', level: 'enterprise', verified: true }
      ]
    };
  }

  private initializeResources(): NodeResources {
    return {
      cpu: { total: 100, used: 0, available: 100, utilization: 0, efficiency: 1.0, trend: 'stable' },
      memory: { total: 8192, used: 0, available: 8192, utilization: 0, efficiency: 1.0, trend: 'stable' },
      storage: { total: 102400, used: 0, available: 102400, utilization: 0, efficiency: 1.0, trend: 'stable' },
      network: { total: 1000, used: 0, available: 1000, utilization: 0, efficiency: 1.0, trend: 'stable' },
      custom: new Map()
    };
  }

  private initializePerformance(): NodePerformance {
    return {
      taskThroughput: 0,
      responseTime: {
        average: 0, p50: 0, p95: 0, p99: 0, min: 0, max: 0, standardDeviation: 0
      },
      errorRate: 0,
      availability: 1.0,
      reliability: 1.0,
      consistency: 1.0,
      scalabilityIndex: 1.0
    };
  }

  private initializeReputation(): ReputationScore {
    return {
      overall: 1.0,
      taskCompletion: 1.0,
      reliability: 1.0,
      collaboration: 1.0,
      security: 1.0,
      performance: 1.0,
      history: []
    };
  }

  private initializeTrustMetrics(): TrustMetrics {
    return {
      directTrust: 1.0,
      recommendationTrust: 1.0,
      behavioralTrust: 1.0,
      cryptographicTrust: 1.0,
      timeDecayedTrust: 1.0,
      aggregatedTrust: 1.0
    };
  }

  private initializeHealth(): HealthMetrics {
    return {
      overall: 1.0,
      cpu: 1.0,
      memory: 1.0,
      network: 1.0,
      consensus: 1.0,
      application: 1.0,
      lastHealthCheck: new Date(),
      healthHistory: []
    };
  }

  private async establishOptimalConnections(node: EnhancedMeshNode): Promise<void> {
    // Find optimal neighbors using AI-driven selection
    const potentialNeighbors = Array.from(this.nodes.values())
      .filter(n => n.id !== node.id)
      .sort((a, b) => this.calculateConnectionScore(node, b) - this.calculateConnectionScore(node, a))
      .slice(0, this.config.maxNeighborsPerNode);
    
    for (const neighbor of potentialNeighbors) {
      await this.establishConnection(node, neighbor);
    }
  }

  private calculateConnectionScore(node1: EnhancedMeshNode, node2: EnhancedMeshNode): number {
    // Calculate connection score based on multiple factors
    const latencyScore = 1.0; // Placeholder
    const capacityScore = 1.0; // Placeholder
    const trustScore = (node1.trustMetrics.aggregatedTrust + node2.trustMetrics.aggregatedTrust) / 2;
    const diversityScore = 1.0; // Placeholder
    
    return (latencyScore * 0.3) + (capacityScore * 0.3) + (trustScore * 0.2) + (diversityScore * 0.2);
  }

  private async establishConnection(node1: EnhancedMeshNode, node2: EnhancedMeshNode): Promise<void> {
    const relation: NeighborRelation = {
      nodeId: node2.id,
      relationshipType: 'direct',
      strength: 1.0,
      latency: 10, // ms
      bandwidth: 1000, // Mbps
      reliability: 0.99,
      encryptionEnabled: this.config.encryptionEnabled,
      lastCommunication: new Date(),
      messagesSent: 0,
      messagesReceived: 0,
      errorCount: 0
    };
    
    node1.neighbors.set(node2.id, relation);
    
    // Symmetric connection
    const reverseRelation: NeighborRelation = {
      ...relation,
      nodeId: node1.id
    };
    
    node2.neighbors.set(node1.id, reverseRelation);
  }

  private async updateTopology(): Promise<void> {
    this.topology.lastUpdated = new Date();
    this.topology.diameter = this.calculateNetworkDiameter();
    this.topology.clustering = this.calculateClusteringCoefficient();
    this.topology.efficiency = this.calculateNetworkEfficiency();
  }

  private async runConsensus(type: string, payload: any): Promise<ConsensusResult> {
    const consensusId = generateId('consensus');
    
    try {
      const algorithm = this.consensusAlgorithms.get(this.config.primaryConsensusAlgorithm)!;
      
      // Run consensus based on algorithm type
      let result: ConsensusResult;
      
      switch (algorithm.name) {
        case 'raft':
          result = await this.runRaftConsensus(consensusId, type, payload);
          break;
        case 'pbft':
          result = await this.runPBFTConsensus(consensusId, type, payload);
          break;
        default:
          throw new Error(`Unsupported consensus algorithm: ${algorithm.name}`);
      }
      
      // Update consensus metrics
      this.updateConsensusMetrics(algorithm.name, result);
      
      return result;
      
    } catch (error) {
      this.logger.error('Consensus failed', { consensusId, type, error });
      throw error;
    }
  }

  private async runRaftConsensus(consensusId: string, type: string, payload: any): Promise<ConsensusResult> {
    // Simplified Raft consensus implementation
    const raftState = this.activeConsensus.get('raft') as RaftState;
    
    // Create log entry
    const logEntry: RaftLogEntry = {
      term: raftState.currentTerm,
      index: raftState.log.length,
      command: {
        type: type as any,
        payload,
        clientId: 'coordinator',
        timestamp: new Date(),
        priority: 1
      },
      timestamp: new Date(),
      clientId: 'coordinator',
      sequenceNumber: raftState.log.length
    };
    
    // Add to log
    raftState.log.push(logEntry);
    
    // For now, return approved (simplified implementation)
    return {
      consensusId,
      approved: true,
      votes: this.nodes.size,
      requiredVotes: Math.floor(this.nodes.size / 2) + 1,
      duration: 50,
      algorithm: 'raft'
    };
  }

  private async runPBFTConsensus(consensusId: string, type: string, payload: any): Promise<ConsensusResult> {
    // Simplified PBFT consensus implementation
    const pbftState = this.activeConsensus.get('pbft') as PBFTState;
    
    // Increment sequence
    pbftState.sequence++;
    
    // For now, return approved (simplified implementation)
    return {
      consensusId,
      approved: true,
      votes: this.nodes.size,
      requiredVotes: Math.floor((this.nodes.size * 2) / 3) + 1,
      duration: 75,
      algorithm: 'pbft'
    };
  }

  private async selectOptimalNode(task: TaskDefinition): Promise<EnhancedMeshNode | null> {
    // AI-driven node selection based on multiple criteria
    const candidateNodes = Array.from(this.nodes.values())
      .filter(node => node.status.state === 'active')
      .filter(node => this.nodeCanHandleTask(node, task));
    
    if (candidateNodes.length === 0) {
      return null;
    }
    
    // Score nodes based on multiple factors
    const scoredNodes = candidateNodes.map(node => ({
      node,
      score: this.calculateNodeScore(node, task)
    }));
    
    // Sort by score (highest first)
    scoredNodes.sort((a, b) => b.score - a.score);
    
    return scoredNodes[0].node;
  }

  private nodeCanHandleTask(node: EnhancedMeshNode, task: TaskDefinition): boolean {
    // Check if node has required capabilities
    const requiredCapabilities = (task as any).requiredCapabilities || [];
    return requiredCapabilities.every((cap: string) => 
      node.capabilities.softwareFeatures.includes(cap)
    );
  }

  private calculateNodeScore(node: EnhancedMeshNode, task: TaskDefinition): number {
    // Multi-factor scoring algorithm
    const loadScore = 1.0 - (node.resources.cpu.utilization / 100);
    const performanceScore = node.performance.reliability;
    const reputationScore = node.reputation.overall;
    const proximityScore = 1.0; // Placeholder for network proximity
    
    return (loadScore * 0.3) + (performanceScore * 0.25) + 
           (reputationScore * 0.25) + (proximityScore * 0.2);
  }

  private async routeTaskToNode(task: TaskDefinition, node: EnhancedMeshNode): Promise<void> {
    // Route task using adaptive routing
    const optimalPath = await this.findOptimalPath('coordinator', node.id);
    
    // Send task through optimal path
    this.logger.debug('Routing task to node', {
      taskId: task.id.id,
      nodeId: node.id,
      path: optimalPath?.hops
    });
  }

  private async findOptimalPath(source: string, destination: string): Promise<RoutingPath | null> {
    // Check cache first
    const cacheKey = `${source}-${destination}`;
    const cachedPaths = this.adaptiveRouter.pathCache.get(cacheKey);
    
    if (cachedPaths && cachedPaths.length > 0) {
      // Return best cached path
      return cachedPaths[0];
    }
    
    // Compute new path using ML predictions
    const path = await this.computeOptimalPath(source, destination);
    
    if (path) {
      // Cache the path
      this.adaptiveRouter.pathCache.set(cacheKey, [path]);
    }
    
    return path;
  }

  private async computeOptimalPath(source: string, destination: string): Promise<RoutingPath | null> {
    // Simplified path computation (would use Dijkstra, A*, or ML-based algorithm)
    return {
      id: generateId('path'),
      source,
      destination,
      hops: [source, destination],
      latency: 10,
      bandwidth: 1000,
      reliability: 0.99,
      cost: 1,
      congestion: 0.1,
      quality: 0.9,
      lastUpdated: new Date()
    };
  }

  private updateTaskAssignmentMetrics(nodeId: string): void {
    // Update metrics for task assignment
    this.performanceMetrics.throughput += 1;
  }

  private async collectTopologyMetrics(): Promise<TopologyMetrics> {
    return {
      nodeCount: this.nodes.size,
      connectionCount: this.countTotalConnections(),
      averageLatency: this.calculateAverageLatency(),
      networkReliability: this.calculateNetworkReliability(),
      loadDistribution: this.calculateLoadDistribution(),
      clusteringCoefficient: this.calculateClusteringCoefficient(),
      networkDiameter: this.calculateNetworkDiameter(),
      efficiency: this.calculateNetworkEfficiency()
    };
  }

  private async runTopologyOptimization(currentMetrics: TopologyMetrics): Promise<OptimizationResult> {
    // Run AI-based topology optimization
    this.logger.debug('Running topology optimization algorithm', {
      algorithm: this.topologyOptimizer.algorithm,
      currentMetrics
    });
    
    // Placeholder optimization result
    return {
      improvements: [],
      performanceGain: 0.05,
      stabilityImprovement: 0.02,
      optimizationTime: 1000
    };
  }

  private async applyTopologyChanges(improvements: TopologyImprovement[]): Promise<void> {
    for (const improvement of improvements.slice(0, this.config.maxTopologyChangesPerInterval)) {
      await this.applyTopologyImprovement(improvement);
    }
  }

  private async applyTopologyImprovement(improvement: TopologyImprovement): Promise<void> {
    // Apply specific topology improvement
    this.logger.debug('Applying topology improvement', { improvement });
  }

  private countTotalConnections(): number {
    let total = 0;
    for (const node of this.nodes.values()) {
      total += node.neighbors.size;
    }
    return total / 2; // Each connection is counted twice
  }

  private calculateNetworkDiameter(): number {
    // Calculate network diameter using Floyd-Warshall or BFS
    return 3; // Placeholder
  }

  private calculateClusteringCoefficient(): number {
    // Calculate average clustering coefficient
    return 0.7; // Placeholder
  }

  private calculateNetworkEfficiency(): number {
    // Calculate network efficiency metric
    return 0.85; // Placeholder
  }

  private calculateConsensusLatency(): number {
    // Calculate average consensus latency
    return 50; // ms
  }

  private calculateConsensusSuccessRate(): number {
    // Calculate consensus success rate
    return 0.99;
  }

  private calculateConsensusThroughput(): number {
    // Calculate consensus throughput (decisions per second)
    return 100;
  }

  private calculateAverageLatency(): number {
    let totalLatency = 0;
    let connectionCount = 0;
    
    for (const node of this.nodes.values()) {
      for (const neighbor of node.neighbors.values()) {
        totalLatency += neighbor.latency;
        connectionCount++;
      }
    }
    
    return connectionCount > 0 ? totalLatency / connectionCount : 0;
  }

  private calculateNetworkReliability(): number {
    let totalReliability = 0;
    let connectionCount = 0;
    
    for (const node of this.nodes.values()) {
      for (const neighbor of node.neighbors.values()) {
        totalReliability += neighbor.reliability;
        connectionCount++;
      }
    }
    
    return connectionCount > 0 ? totalReliability / connectionCount : 1.0;
  }

  private calculateLoadDistribution(): Map<string, number> {
    const distribution = new Map<string, number>();
    
    for (const node of this.nodes.values()) {
      distribution.set(node.id, node.resources.cpu.utilization);
    }
    
    return distribution;
  }

  private getLastOptimizationTime(): Date {
    return new Date(); // Placeholder
  }

  private calculateOptimizationFrequency(): number {
    return this.config.topologyOptimizationInterval / 1000; // per second
  }

  private calculateImprovementTrend(): number {
    return 0.05; // 5% improvement trend
  }

  private calculateConvergenceStability(): number {
    return 0.95; // 95% stability
  }

  private async redistributeConnections(node: EnhancedMeshNode): Promise<void> {
    // Redistribute connections of removed node to maintain connectivity
    for (const [neighborId, _] of node.neighbors) {
      const neighbor = this.nodes.get(neighborId);
      if (neighbor) {
        neighbor.neighbors.delete(node.id);
        // Find new connections to maintain network properties
        await this.rebalanceNodeConnections(neighbor);
      }
    }
  }

  private async rebalanceNodeConnections(node: EnhancedMeshNode): Promise<void> {
    // Rebalance connections for a specific node
    if (node.neighbors.size < this.config.maxNeighborsPerNode / 2) {
      await this.establishOptimalConnections(node);
    }
  }

  private performHealthChecks(): void {
    for (const node of this.nodes.values()) {
      this.checkNodeHealth(node);
    }
  }

  private checkNodeHealth(node: EnhancedMeshNode): void {
    // Check node health and update metrics
    const cpuHealth = 1.0 - (node.resources.cpu.utilization / 100);
    const memoryHealth = 1.0 - (node.resources.memory.utilization / 100);
    const networkHealth = node.performance.reliability;
    
    node.health.cpu = cpuHealth;
    node.health.memory = memoryHealth;
    node.health.network = networkHealth;
    node.health.overall = (cpuHealth + memoryHealth + networkHealth) / 3;
    node.health.lastHealthCheck = new Date();
    
    // Detect unhealthy nodes
    if (node.health.overall < 0.5) {
      this.handleUnhealthyNode(node);
    }
  }

  private handleUnhealthyNode(node: EnhancedMeshNode): void {
    this.logger.warn('Unhealthy node detected', {
      nodeId: node.id,
      health: node.health.overall
    });
    
    // Add to suspected nodes
    this.faultDetector.suspectedNodes.set(node.id, {
      level: 0.7,
      firstSuspected: new Date(),
      lastUpdated: new Date(),
      confirmations: 1,
      evidence: [{
        type: 'performance',
        severity: 0.7,
        timestamp: new Date(),
        details: { health: node.health }
      }]
    });
    
    this.emit('node:unhealthy', { nodeId: node.id, health: node.health });
  }

  private maintainConsensus(): void {
    // Maintain consensus algorithms (heartbeats, timeouts, etc.)
    for (const [algorithmName, algorithm] of this.consensusAlgorithms) {
      switch (algorithmName) {
        case 'raft':
          this.maintainRaftConsensus();
          break;
        case 'pbft':
          this.maintainPBFTConsensus();
          break;
      }
    }
  }

  private maintainRaftConsensus(): void {
    const raftState = this.activeConsensus.get('raft') as RaftState;
    
    // Check election timeout
    const timeSinceLastHeartbeat = Date.now() - raftState.lastHeartbeat.getTime();
    if (timeSinceLastHeartbeat > raftState.electionTimeout) {
      // Start election
      this.startRaftElection();
    }
  }

  private startRaftElection(): void {
    this.logger.debug('Starting Raft election');
    // Simplified election process
  }

  private maintainPBFTConsensus(): void {
    // Maintain PBFT consensus state
    this.logger.debug('Maintaining PBFT consensus');
  }

  private collectAndUpdateMetrics(): void {
    // Update performance metrics
    this.performanceMetrics.totalNodes = this.nodes.size;
    this.performanceMetrics.activeConnections = this.countTotalConnections();
    this.performanceMetrics.averageLatency = this.calculateAverageLatency();
    this.performanceMetrics.networkReliability = this.calculateNetworkReliability();
    this.performanceMetrics.loadDistribution = this.calculateLoadDistribution();
    
    // Add to history
    this.metricsHistory.push({
      timestamp: new Date(),
      metrics: { ...this.performanceMetrics }
    });
    
    // Keep history size manageable
    if (this.metricsHistory.length > this.config.performanceHistorySize) {
      this.metricsHistory = this.metricsHistory.slice(-this.config.performanceHistorySize);
    }
  }

  private updateConsensusMetrics(algorithm: string, result: ConsensusResult): void {
    const consensusAlg = this.consensusAlgorithms.get(algorithm);
    if (consensusAlg) {
      consensusAlg.performance.averageLatency = 
        (consensusAlg.performance.averageLatency + result.duration) / 2;
      consensusAlg.performance.successRate = 
        result.approved ? 
          Math.min(1.0, consensusAlg.performance.successRate + 0.01) :
          Math.max(0.0, consensusAlg.performance.successRate - 0.1);
    }
  }

  private createDefaultRecoveryStrategies(): RecoveryStrategy[] {
    return [
      {
        id: 'isolation-recovery',
        name: 'Isolation and Rejoin',
        applicableScenarios: ['node-fault', 'partition'],
        steps: [
          {
            id: 'isolate',
            description: 'Isolate faulty node',
            action: 'isolate',
            parameters: {},
            timeout: 5000
          },
          {
            id: 'rejoin',
            description: 'Rejoin node to mesh',
            action: 'rejoin',
            parameters: {},
            timeout: 10000
          }
        ],
        estimatedTime: 15000,
        successProbability: 0.85,
        resourceRequirements: {
          cpu: 10,
          memory: 100,
          network: 50,
          storage: 0,
          exclusiveAccess: []
        }
      }
    ];
  }

  private async analyzePartition(partitionedNodes: string[]): Promise<PartitionAnalysis> {
    return {
      severity: 'medium',
      affectedNodes: partitionedNodes.length,
      totalNodes: this.nodes.size,
      connectivityLoss: partitionedNodes.length / this.nodes.size,
      estimatedRecoveryTime: 30000,
      recommendedStrategy: 'isolation-recovery'
    };
  }

  private async selectRecoveryStrategy(analysis: PartitionAnalysis): Promise<RecoveryStrategy> {
    // Select best recovery strategy based on analysis
    return this.recoveryManager.strategies.find(s => 
      s.id === analysis.recommendedStrategy
    ) || this.recoveryManager.strategies[0];
  }

  private async executePartitionRecovery(
    partitionId: string,
    strategy: RecoveryStrategy,
    partitionedNodes: string[]
  ): Promise<PartitionRecoveryResult> {
    const startTime = Date.now();
    
    try {
      // Execute recovery steps
      for (const step of strategy.steps) {
        await this.executeRecoveryStep(step, partitionedNodes);
      }
      
      const duration = Date.now() - startTime;
      
      return {
        partitionId,
        strategy: strategy.id,
        success: true,
        duration,
        recoveredNodes: partitionedNodes.length,
        startTime: new Date(startTime),
        endTime: new Date()
      };
      
    } catch (error) {
      return {
        partitionId,
        strategy: strategy.id,
        success: false,
        duration: Date.now() - startTime,
        recoveredNodes: 0,
        error: (error as Error).message,
        startTime: new Date(startTime),
        endTime: new Date()
      };
    }
  }

  private async executeRecoveryStep(step: RecoveryStep, affectedNodes: string[]): Promise<void> {
    this.logger.debug('Executing recovery step', { 
      stepId: step.id, 
      action: step.action, 
      affectedNodes: affectedNodes.length 
    });
    
    // Execute step based on action type
    switch (step.action) {
      case 'isolate':
        await this.isolateNodes(affectedNodes);
        break;
      case 'rejoin':
        await this.rejoinNodes(affectedNodes);
        break;
      case 'redistribute':
        await this.redistributeLoad(affectedNodes);
        break;
      default:
        throw new Error(`Unknown recovery action: ${step.action}`);
    }
  }

  private async isolateNodes(nodeIds: string[]): Promise<void> {
    for (const nodeId of nodeIds) {
      const node = this.nodes.get(nodeId);
      if (node) {
        node.status.state = 'maintenance';
        node.status.connectivityLevel = 'isolated';
      }
    }
  }

  private async rejoinNodes(nodeIds: string[]): Promise<void> {
    for (const nodeId of nodeIds) {
      const node = this.nodes.get(nodeId);
      if (node) {
        node.status.state = 'active';
        node.status.connectivityLevel = 'full';
        await this.rebalanceNodeConnections(node);
      }
    }
  }

  private async redistributeLoad(nodeIds: string[]): Promise<void> {
    // Redistribute load from affected nodes
    this.logger.debug('Redistributing load', { affectedNodes: nodeIds.length });
  }
}

// ===== ADDITIONAL TYPES =====

export interface EnhancedMeshConfig {
  primaryConsensusAlgorithm: 'raft' | 'pbft' | 'hotstuff' | 'tendermint';
  fallbackConsensusAlgorithm: 'raft' | 'pbft' | 'hotstuff' | 'tendermint';
  consensusTimeout: number;
  maxConsensusRounds: number;
  topologyOptimizationInterval: number;
  optimizationAlgorithm: 'genetic' | 'simulated-annealing' | 'reinforcement-learning';
  maxTopologyChangesPerInterval: number;
  convergenceThreshold: number;
  maxLatencyMs: number;
  minThroughput: number;
  maxErrorRate: number;
  targetReliability: number;
  faultDetectionAlgorithm: 'phi-accrual' | 'chen-toueg' | 'heartbeat';
  maxByzantineFaults: number;
  recoveryTimeoutMs: number;
  autoRecoveryEnabled: boolean;
  maxNodes: number;
  maxNeighborsPerNode: number;
  minClusterSize: number;
  maxClusterSize: number;
  encryptionEnabled: boolean;
  authenticationRequired: boolean;
  reputationBasedTrust: boolean;
  metricsCollectionInterval: number;
  healthCheckInterval: number;
  performanceHistorySize: number;
}

export interface NetworkTopology {
  id: string;
  nodes: Map<string, EnhancedMeshNode>;
  connections: Map<string, NeighborRelation>;
  clusters: string[];
  diameter: number;
  clustering: number;
  efficiency: number;
  lastUpdated: Date;
}

export interface EnhancedMeshMetrics {
  totalNodes: number;
  activeConnections: number;
  averageLatency: number;
  networkReliability: number;
  throughput: number;
  loadDistribution: Map<string, number>;
  consensusAccuracy: number;
  partitionResilienceScore: number;
  cpuUtilization: number;
  memoryUtilization: number;
  networkUtilization: number;
  errorRate: number;
  availability: number;
  scalabilityIndex: number;
  lastUpdated: Date;
  consensus: {
    algorithmsActive: number;
    averageLatency: number;
    successRate: number;
    throughput: number;
  };
  topology: {
    nodes: number;
    connections: number;
    diameter: number;
    clustering: number;
    efficiency: number;
  };
  faultTolerance: {
    byzantineFaultCapacity: number;
    suspectedFaults: number;
    activeRecoveries: number;
    mttr: number;
  };
  optimization: {
    lastOptimization: Date;
    optimizationFrequency: number;
    improvementTrend: number;
    convergenceStability: number;
  };
}

export interface ConsensusResult {
  consensusId: string;
  approved: boolean;
  votes: number;
  requiredVotes: number;
  duration: number;
  algorithm: string;
}

export interface TopologyMetrics {
  nodeCount: number;
  connectionCount: number;
  averageLatency: number;
  networkReliability: number;
  loadDistribution: Map<string, number>;
  clusteringCoefficient: number;
  networkDiameter: number;
  efficiency: number;
}

export interface OptimizationResult {
  improvements: TopologyImprovement[];
  performanceGain: number;
  stabilityImprovement: number;
  optimizationTime: number;
}

export interface TopologyImprovement {
  type: 'add-connection' | 'remove-connection' | 'rebalance-load' | 'relocate-node';
  parameters: Record<string, any>;
  expectedGain: number;
}

export interface TopologyOptimizationResult {
  startTime: Date;
  duration: number;
  algorithm: string;
  improvementsApplied: number;
  performanceGain: number;
  stabilityImprovement: number;
  metrics: {
    before: TopologyMetrics;
    after: TopologyMetrics;
  };
}

export interface PartitionAnalysis {
  severity: 'low' | 'medium' | 'high' | 'critical';
  affectedNodes: number;
  totalNodes: number;
  connectivityLoss: number;
  estimatedRecoveryTime: number;
  recommendedStrategy: string;
}

export interface PartitionRecoveryResult {
  partitionId: string;
  strategy: string;
  success: boolean;
  duration: number;
  recoveredNodes: number;
  error?: string;
  startTime: Date;
  endTime: Date;
}

export interface MetricsHistory {
  timestamp: Date;
  metrics: EnhancedMeshMetrics;
}