/**
 * A2A Chaos Engineering Tests
 * Comprehensive fault tolerance validation through controlled failure injection
 */

import {
  A2AComplianceTestSuite,
  A2ATestDataBuilder,
  A2ATestUtils,
  MockAgent,
  MockA2AMessageBus,
  A2AMessage,
  A2AResponse,
  A2AErrorCode
} from './test-harness';
import { performance } from 'perf_hooks';

// Chaos testing configuration
const CHAOS_CONFIG = {
  MAX_FAILURE_DURATION: 30000, // 30 seconds
  MIN_RECOVERY_TIME: 5000,     // 5 seconds
  FAULT_INJECTION_RATE: 0.1,   // 10% of operations
  ACCEPTABLE_FAILURE_RATE: 0.05, // 5% acceptable failure rate
  RECOVERY_SUCCESS_THRESHOLD: 0.95 // 95% recovery success
};

// Failure scenarios
enum FailureType {
  AGENT_CRASH = 'agent_crash',
  NETWORK_PARTITION = 'network_partition',
  RESOURCE_EXHAUSTION = 'resource_exhaustion',
  MESSAGE_CORRUPTION = 'message_corruption',
  TIMEOUT_CASCADE = 'timeout_cascade',
  BYZANTINE_BEHAVIOR = 'byzantine_behavior',
  SPLIT_BRAIN = 'split_brain',
  SLOW_DEATH = 'slow_death'
}

describe('A2A Chaos Engineering Tests', () => {
  let testSuite: ChaosEngineeringTestSuite;

  beforeEach(async () => {
    testSuite = new ChaosEngineeringTestSuite();
    await testSuite.setup();
  });

  afterEach(async () => {
    await testSuite.teardown();
  });

  describe('Agent Failure Scenarios', () => {
    it('should handle sudden agent crashes gracefully', async () => {
      const chaosTest = await testSuite.runChaosExperiment({
        name: 'agent_crash_recovery',
        failureType: FailureType.AGENT_CRASH,
        targetAgents: 2,
        duration: 10000,
        recoveryValidation: true
      });

      expect(chaosTest.systemSurvived).toBe(true);
      expect(chaosTest.dataLoss).toBe(false);
      expect(chaosTest.recoveryTime).toBeLessThan(CHAOS_CONFIG.MIN_RECOVERY_TIME);
      expect(chaosTest.failoverSuccess).toBe(true);
      
      console.log(`Agent Crash Test Results:
        Agents Failed: ${chaosTest.agentsAffected}
        Recovery Time: ${chaosTest.recoveryTime}ms
        Data Integrity: ${chaosTest.dataIntegrity}
        Service Continuity: ${chaosTest.serviceContinuity}`);
    });

    it('should handle agent slow death scenarios', async () => {
      const slowDeathTest = await testSuite.runSlowDeathExperiment(
        testSuite.chaosAgents[0].id,
        15000, // 15 second degradation
        5000   // 5 second complete failure
      );

      expect(slowDeathTest.earlyDetection).toBe(true);
      expect(slowDeathTest.gracefulHandover).toBe(true);
      expect(slowDeathTest.serviceInterruption).toBeLessThan(1000); // < 1 second interruption
      expect(slowDeathTest.clientsNotified).toBe(true);
    });

    it('should handle cascading agent failures', async () => {
      const cascadeTest = await testSuite.runCascadingFailureTest(
        3, // Start with 3 agents
        0.5, // 50% failure probability
        2000 // 2 second intervals
      );

      expect(cascadeTest.cascadeStopped).toBe(true);
      expect(cascadeTest.systemStabilized).toBe(true);
      expect(cascadeTest.finalHealthyAgents).toBeGreaterThan(0);
      expect(cascadeTest.recoveryStrategy).toBeDefined();
    });

    it('should handle Byzantine agent behavior', async () => {
      const byzantineTest = await testSuite.runByzantineFailureTest(
        testSuite.chaosAgents[0].id,
        {
          corruptMessages: true,
          sendDuplicates: true,
          ignoreProtocol: true,
          maliciousVoting: true
        }
      );

      expect(byzantineTest.byzantineDetected).toBe(true);
      expect(byzantineTest.agentIsolated).toBe(true);
      expect(byzantineTest.systemIntegrity).toBe(true);
      expect(byzantineTest.consensusPreserved).toBe(true);
    });
  });

  describe('Network Failure Scenarios', () => {
    it('should handle network partitions', async () => {
      const partitionTest = await testSuite.runNetworkPartitionTest(
        [testSuite.chaosAgents[0].id, testSuite.chaosAgents[1].id], // Partition 1
        [testSuite.chaosAgents[2].id, testSuite.chaosAgents[3].id], // Partition 2
        15000 // 15 second partition
      );

      expect(partitionTest.partitionDetected).toBe(true);
      expect(partitionTest.splitBrainPrevented).toBe(true);
      expect(partitionTest.leaderElection).toBe(true);
      expect(partitionTest.dataConsistency).toBe(true);
      expect(partitionTest.healingSuccessful).toBe(true);
    });

    it('should handle message loss and duplication', async () => {
      const messageFaultTest = await testSuite.runMessageFaultTest({
        lossRate: 0.1,      // 10% message loss
        duplicationRate: 0.05, // 5% message duplication
        corruptionRate: 0.02,  // 2% message corruption
        reorderingRate: 0.03,  // 3% message reordering
        duration: 20000
      });

      expect(messageFaultTest.protocolResilience).toBeGreaterThan(0.9);
      expect(messageFaultTest.duplicateHandling).toBe(true);
      expect(messageFaultTest.corruptionDetection).toBe(true);
      expect(messageFaultTest.orderingPreserved).toBe(true);
    });

    it('should handle intermittent connectivity', async () => {
      const connectivityTest = await testSuite.runIntermittentConnectivityTest(
        testSuite.chaosAgents[0].id,
        {
          disconnectDuration: 2000,  // 2 second disconnects
          connectDuration: 5000,     // 5 seconds connected
          cycles: 10,                // 10 cycles
          jitterPercent: 0.2         // 20% timing jitter
        }
      );

      expect(connectivityTest.reconnectionSuccess).toBeGreaterThan(0.95);
      expect(connectivityTest.messageQueuing).toBe(true);
      expect(connectivityTest.stateResynchronization).toBe(true);
      expect(connectivityTest.duplicatePreventionEffective).toBe(true);
    });

    it('should handle high latency and jitter', async () => {
      const latencyTest = await testSuite.runLatencyJitterTest({
        baseLatency: 100,      // 100ms base latency
        maxJitter: 500,        // Up to 500ms jitter
        latencySpikes: true,   // Random 2-5 second spikes
        duration: 30000
      });

      expect(latencyTest.timeoutAdaptation).toBe(true);
      expect(latencyTest.backpressureHandling).toBe(true);
      expect(latencyTest.priorityPreservation).toBe(true);
      expect(latencyTest.qualityOfService).toBeGreaterThan(0.8);
    });
  });

  describe('Resource Exhaustion Scenarios', () => {
    it('should handle memory exhaustion', async () => {
      const memoryExhaustionTest = await testSuite.runMemoryExhaustionTest(
        testSuite.chaosAgents[0].id,
        {
          targetMemoryMB: 500,    // Exhaust to 500MB
          rampUpDuration: 10000,  // 10 second ramp up
          sustainDuration: 5000   // 5 seconds at limit
        }
      );

      expect(memoryExhaustionTest.memoryPressureDetected).toBe(true);
      expect(memoryExhaustionTest.gracefulDegradation).toBe(true);
      expect(memoryExhaustionTest.oomPrevented).toBe(true);
      expect(memoryExhaustionTest.recoveryAfterRelief).toBe(true);
    });

    it('should handle CPU starvation', async () => {
      const cpuStarvationTest = await testSuite.runCPUStarvationTest(
        testSuite.chaosAgents[0].id,
        {
          cpuUtilization: 0.95,   // 95% CPU usage
          duration: 15000,        // 15 seconds
          spikeDuration: 2000,    // 2 second spikes to 100%
          spikeInterval: 3000     // Every 3 seconds
        }
      );

      expect(cpuStarvationTest.cpuPressureDetected).toBe(true);
      expect(cpuStarvationTest.processThrottling).toBe(true);
      expect(cpuStarvationTest.responsivenessMaintained).toBe(true);
      expect(cpuStarvationTest.priorityQueueingEffective).toBe(true);
    });

    it('should handle disk space exhaustion', async () => {
      const diskExhaustionTest = await testSuite.runDiskExhaustionTest({
        targetFreeSpaceMB: 10,  // Reduce to 10MB free
        logRotationForced: true,
        tempFileCleanup: true,
        cacheEviction: true
      });

      expect(diskExhaustionTest.spaceReclaimed).toBeGreaterThan(50); // At least 50MB reclaimed
      expect(diskExhaustionTest.operationsContinued).toBe(true);
      expect(diskExhaustionTest.alertsGenerated).toBe(true);
      expect(diskExhaustionTest.gracefulShutdownCapable).toBe(true);
    });

    it('should handle file descriptor exhaustion', async () => {
      const fdExhaustionTest = await testSuite.runFileDescriptorExhaustionTest(
        testSuite.chaos Agents[0].id,
        {
          targetFDCount: 1000,    // Exhaust to near limit
          leakSimulation: true,   // Simulate FD leaks
          cleanupTesting: true    // Test cleanup mechanisms
        }
      );

      expect(fdExhaustionTest.fdLeaksDetected).toBe(true);
      expect(fdExhaustionTest.cleanupTriggered).toBe(true);
      expect(fdExhaustionTest.newConnectionsHandled).toBe(true);
      expect(fdExhaustionTest.systemStability).toBe(true);
    });
  });

  describe('Timing and Synchronization Failures', () => {
    it('should handle clock skew and drift', async () => {
      const clockSkewTest = await testSuite.runClockSkewTest([
        { agentId: testSuite.chaosAgents[0].id, skewMs: 5000 },   // 5 seconds ahead
        { agentId: testSuite.chaosAgents[1].id, skewMs: -3000 },  // 3 seconds behind
        { agentId: testSuite.chaosAgents[2].id, skewMs: 1000 }    // 1 second ahead
      ]);

      expect(clockSkewTest.skewDetected).toBe(true);
      expect(clockSkewTest.timestampValidation).toBe(true);
      expect(clockSkewTest.orderingPreserved).toBe(true);
      expect(clockSkewTest.consensusReached).toBe(true);
    });

    it('should handle timeout cascades', async () => {
      const timeoutCascadeTest = await testSuite.runTimeoutCascadeTest({
        initialTimeout: 1000,      // 1 second initial timeout
        cascadeMultiplier: 1.5,    // 50% increase per level
        maxCascadeLevels: 5,       // Maximum 5 levels
        recoveryThreshold: 0.8     // 80% success to stop cascade
      });

      expect(timeoutCascadeTest.cascadeContained).toBe(true);
      expect(timeoutCascadeTest.circuitBreakerTriggered).toBe(true);
      expect(timeoutCascadeTest.systemRecovered).toBe(true);
      expect(timeoutCascadeTest.adaptiveTimeouts).toBe(true);
    });

    it('should handle race conditions in state updates', async () => {
      const raceConditionTest = await testSuite.runRaceConditionTest({
        concurrentUpdates: 20,     // 20 concurrent state updates
        conflictRate: 0.3,         // 30% expected conflicts
        resolutionStrategy: 'last-write-wins',
        consistencyCheck: true
      });

      expect(raceConditionTest.conflictsDetected).toBeGreaterThan(0);
      expect(raceConditionTest.conflictsResolved).toBe(raceConditionTest.conflictsDetected);
      expect(raceConditionTest.dataConsistency).toBe(true);
      expect(raceConditionTest.noDeadlocks).toBe(true);
    });
  });

  describe('Chaos Monkey Integration', () => {
    it('should survive random failure injection', async () => {
      const chaosMonkeyTest = await testSuite.runChaosMonkeyTest({
        duration: 60000,           // 1 minute test
        failureRate: 0.1,          // 10% of operations fail
        randomFailures: true,      // Random failure types
        adaptiveRecovery: true,    // Test adaptive recovery
        healthChecks: true         // Continuous health monitoring
      });

      expect(chaosMonkeyTest.overallAvailability).toBeGreaterThan(0.95);
      expect(chaosMonkeyTest.dataIntegrity).toBe(true);
      expect(chaosMonkeyTest.recoveryEffectiveness).toBeGreaterThan(0.9);
      expect(chaosMonkeyTest.adaptationLearning).toBe(true);
    });

    it('should handle multiple simultaneous failures', async () => {
      const multiFailureTest = await testSuite.runMultipleFailureTest([
        { type: FailureType.AGENT_CRASH, count: 1 },
        { type: FailureType.NETWORK_PARTITION, count: 1 },
        { type: FailureType.RESOURCE_EXHAUSTION, count: 1 }
      ]);

      expect(multiFailureTest.systemSurvived).toBe(true);
      expect(multiFailureTest.emergencyProtocolsActivated).toBe(true);
      expect(multiFailureTest.criticalFunctionsPreserved).toBe(true);
      expect(multiFailureTest.coordinatedRecovery).toBe(true);
    });

    it('should maintain consistency during chaos', async () => {
      const consistencyTest = await testSuite.runConsistencyDuringChaosTest({
        operations: 1000,          // 1000 state operations
        chaosIntensity: 0.2,       // 20% chaos injection
        consistencyChecks: 50,     // 50 consistency validation points
        repairMechanisms: true     // Test self-repair
      });

      expect(consistencyTest.consistencyViolations).toBe(0);
      expect(consistencyTest.selfRepairTriggered).toBe(true);
      expect(consistencyTest.dataReconciled).toBe(true);
      expect(consistencyTest.operationalContinuity).toBeGreaterThan(0.9);
    });
  });

  describe('Recovery and Resilience Validation', () => {
    it('should validate disaster recovery procedures', async () => {
      const disasterRecoveryTest = await testSuite.runDisasterRecoveryTest({
        scenario: 'total_system_failure',
        backupValidation: true,
        recoveryTimeObjective: 30000, // 30 seconds RTO
        recoveryPointObjective: 5000,  // 5 seconds RPO
        automatedRecovery: true
      });

      expect(disasterRecoveryTest.recoveryTime).toBeLessThan(30000);
      expect(disasterRecoveryTest.dataLoss).toBeLessThan(5000);
      expect(disasterRecoveryTest.systemIntegrity).toBe(true);
      expect(disasterRecoveryTest.automationEffectiveness).toBeGreaterThan(0.95);
    });

    it('should validate graceful degradation', async () => {
      const degradationTest = await testSuite.runGracefulDegradationTest({
        capacityReduction: 0.7,    // Reduce capacity by 70%
        serviceLevel: 'essential', // Maintain essential services
        duration: 20000,           // 20 seconds
        recoveryTest: true         // Test full recovery
      });

      expect(degradationTest.essentialServicesOk).toBe(true);
      expect(degradationTest.nonEssentialGracefulStop).toBe(true);
      expect(degradationTest.userNotification).toBe(true);
      expect(degradationTest.fullRecoverySuccessful).toBe(true);
    });

    it('should validate circuit breaker mechanisms', async () => {
      const circuitBreakerTest = await testSuite.runCircuitBreakerTest({
        failureThreshold: 0.5,     // 50% failure rate triggers
        recoveryAttempts: 3,       // 3 recovery attempts
        halfOpenDuration: 5000,    // 5 seconds half-open
        successThreshold: 0.8      // 80% success to close
      });

      expect(circuitBreakerTest.breakerTriggered).toBe(true);
      expect(circuitBreakerTest.recoveryAttempted).toBe(true);
      expect(circuitBreakerTest.normalOperationRestored).toBe(true);
      expect(circuitBreakerTest.noResourceLeak).toBe(true);
    });

    it('should validate self-healing capabilities', async () => {
      const selfHealingTest = await testSuite.runSelfHealingTest({
        faultTypes: [
          FailureType.AGENT_CRASH,
          FailureType.RESOURCE_EXHAUSTION,
          FailureType.MESSAGE_CORRUPTION
        ],
        healingTimeout: 10000,     // 10 seconds to heal
        verificationCycles: 3      // 3 verification cycles
      });

      expect(selfHealingTest.automaticDetection).toBe(true);
      expect(selfHealingTest.automaticRecovery).toBe(true);
      expect(selfHealingTest.verificationPassed).toBe(true);
      expect(selfHealingTest.learningImprovement).toBe(true);
    });
  });

  describe('Chaos Engineering Metrics and Analysis', () => {
    it('should measure system resilience score', async () => {
      const resilienceScore = await testSuite.calculateResilienceScore();

      expect(resilienceScore.overall).toBeGreaterThan(0.8); // 80% resilience
      expect(resilienceScore.availability).toBeGreaterThan(0.95);
      expect(resilienceScore.recoverability).toBeGreaterThan(0.9);
      expect(resilienceScore.adaptability).toBeGreaterThan(0.8);
      expect(resilienceScore.observability).toBeGreaterThan(0.85);
    });

    it('should analyze failure patterns and trends', async () => {
      const failureAnalysis = await testSuite.analyzeFailurePatterns();

      expect(failureAnalysis.commonFailureModes.length).toBeGreaterThan(0);
      expect(failureAnalysis.failureCorrelations).toBeDefined();
      expect(failureAnalysis.mttr).toBeLessThan(5000); // Mean time to recovery < 5 seconds
      expect(failureAnalysis.mtbf).toBeGreaterThan(3600000); // Mean time between failures > 1 hour
    });

    it('should validate SLA compliance under chaos', async () => {
      const slaComplianceTest = await testSuite.validateSLAUnderChaos({
        availabilitySLA: 0.99,     // 99% availability
        latencySLA: 100,           // 100ms max latency
        throughputSLA: 500,        // 500 msg/sec min throughput
        errorRateSLA: 0.01         // 1% max error rate
      });

      expect(slaComplianceTest.availabilityMet).toBe(true);
      expect(slaComplianceTest.latencyMet).toBe(true);
      expect(slaComplianceTest.throughputMet).toBe(true);
      expect(slaComplianceTest.errorRateMet).toBe(true);
      expect(slaComplianceTest.overallCompliance).toBeGreaterThan(0.95);
    });
  });
});

/**
 * Chaos Engineering Test Suite Implementation
 */
class ChaosEngineeringTestSuite extends A2AComplianceTestSuite {
  public chaosAgents: MockAgent[] = [];
  private failureSimulator: FailureSimulator;
  private recoveryValidator: RecoveryValidator;
  private metricsCollector: ChaosMetricsCollector;

  protected async setup(): Promise<void> {
    await super.setup();
    await this.setupChaosEnvironment();
  }

  private async setupChaosEnvironment(): Promise<void> {
    // Create agents specifically for chaos testing
    for (let i = 0; i < 6; i++) {
      const agent = A2ATestDataBuilder.createAgent(
        `chaos-agent-${i}`,
        'chaos-test',
        ['fault-tolerance', 'resilience', 'recovery'],
        [
          'mcp__claude-flow__agent_spawn',
          'mcp__claude-flow__swarm_status',
          'mcp__claude-flow__memory_usage',
          'mcp__claude-flow__health_check'
        ]
      );
      
      this.chaosAgents.push(agent);
      this.messageBus.registerAgent(agent);
    }

    this.failureSimulator = new FailureSimulator(this.chaosAgents, this.messageBus);
    this.recoveryValidator = new RecoveryValidator(this.chaosAgents, this.messageBus);
    this.metricsCollector = new ChaosMetricsCollector();
  }

  async runChaosExperiment(config: ChaosExperimentConfig): Promise<ChaosExperimentResult> {
    const startTime = performance.now();
    
    // Establish baseline
    const baseline = await this.establishBaseline();
    
    // Inject failure
    const failureInjection = await this.failureSimulator.injectFailure(
      config.failureType,
      config.targetAgents,
      config.duration
    );
    
    // Monitor system behavior during failure
    const behaviorMetrics = await this.monitorSystemBehavior(config.duration);
    
    // Validate recovery
    const recoveryResult = config.recoveryValidation 
      ? await this.recoveryValidator.validateRecovery(baseline)
      : null;
    
    const endTime = performance.now();
    
    return {
      experimentName: config.name,
      duration: endTime - startTime,
      systemSurvived: !behaviorMetrics.systemCrash,
      dataLoss: behaviorMetrics.dataLoss,
      dataIntegrity: behaviorMetrics.dataIntegrity,
      serviceContinuity: behaviorMetrics.serviceContinuity,
      recoveryTime: recoveryResult?.recoveryTime || 0,
      failoverSuccess: recoveryResult?.failoverSuccess || false,
      agentsAffected: failureInjection.agentsAffected,
      failureDetectionTime: behaviorMetrics.failureDetectionTime,
      adaptationObserved: behaviorMetrics.adaptationObserved
    };
  }

  async runNetworkPartitionTest(
    partition1: string[],
    partition2: string[],
    duration: number
  ): Promise<NetworkPartitionResult> {
    const startTime = performance.now();
    
    // Create network partition
    await this.failureSimulator.createNetworkPartition(partition1, partition2);
    
    // Monitor both partitions
    const partition1Behavior = await this.monitorPartitionBehavior(partition1, duration);
    const partition2Behavior = await this.monitorPartitionBehavior(partition2, duration);
    
    // Heal partition
    await this.failureSimulator.healNetworkPartition();
    
    // Validate post-healing state
    const healingResult = await this.validateNetworkHealing();
    
    return {
      partitionDetected: partition1Behavior.partitionDetected && partition2Behavior.partitionDetected,
      splitBrainPrevented: !partition1Behavior.multipleLeaders && !partition2Behavior.multipleLeaders,
      leaderElection: partition1Behavior.leaderElected || partition2Behavior.leaderElected,
      dataConsistency: healingResult.dataConsistency,
      healingSuccessful: healingResult.success,
      healingTime: healingResult.duration,
      messagesSynchronized: healingResult.messagesSynchronized
    };
  }

  async runChaosMonkeyTest(config: ChaosMonkeyConfig): Promise<ChaosMonkeyResult> {
    const startTime = performance.now();
    const metricsSnapshot = [];
    
    // Start chaos monkey
    const chaosMonkey = this.startChaosMonkey(config);
    
    // Run for specified duration
    const endTime = startTime + config.duration;
    while (performance.now() < endTime) {
      // Collect metrics every 5 seconds
      await new Promise(resolve => setTimeout(resolve, 5000));
      const snapshot = await this.collectSystemSnapshot();
      metricsSnapshot.push(snapshot);
    }
    
    // Stop chaos monkey
    await this.stopChaosMonkey(chaosMonkey);
    
    // Calculate results
    const availability = this.calculateAvailability(metricsSnapshot);
    const dataIntegrity = await this.validateDataIntegrity();
    const recoveryMetrics = this.analyzeRecoveryMetrics(metricsSnapshot);
    
    return {
      duration: performance.now() - startTime,
      failuresInjected: chaosMonkey.failuresInjected,
      overallAvailability: availability,
      dataIntegrity: dataIntegrity.valid,
      recoveryEffectiveness: recoveryMetrics.effectiveness,
      adaptationLearning: recoveryMetrics.learningObserved,
      resilienceScore: this.calculateResilienceFromMetrics(metricsSnapshot)
    };
  }

  private async establishBaseline(): Promise<SystemBaseline> {
    const throughput = await this.measureThroughput(1000, 5000);
    const latency = await this.measureLatency(100);
    const agentHealth = await this.checkAllAgentsHealth();
    
    return {
      throughput: throughput.messagesPerSecond,
      averageLatency: latency.average,
      healthyAgents: agentHealth.healthyCount,
      timestamp: Date.now()
    };
  }

  private async monitorSystemBehavior(duration: number): Promise<SystemBehaviorMetrics> {
    const startTime = performance.now();
    let systemCrash = false;
    let dataLoss = false;
    let dataIntegrity = true;
    let serviceContinuity = true;
    let failureDetectionTime = 0;
    let adaptationObserved = false;
    
    const endTime = startTime + duration;
    
    while (performance.now() < endTime) {
      try {
        // Test basic functionality
        const testMessage = A2ATestDataBuilder.createMessage({
          toolName: 'mcp__claude-flow__health_check',
          parameters: {},
          target: { type: 'single', agentId: this.chaosAgents[0].id }
        });
        
        const response = await this.messageBus.send(testMessage);
        
        if (!response.success && failureDetectionTime === 0) {
          failureDetectionTime = performance.now() - startTime;
        }
        
        if (response.success && failureDetectionTime > 0) {
          adaptationObserved = true;
        }
        
      } catch (error) {
        if (!systemCrash) {
          systemCrash = true;
        }
      }
      
      await new Promise(resolve => setTimeout(resolve, 1000));
    }
    
    return {
      systemCrash,
      dataLoss,
      dataIntegrity,
      serviceContinuity,
      failureDetectionTime,
      adaptationObserved
    };
  }

  async runTests(): Promise<void> {
    console.log('Running A2A Chaos Engineering Tests...');
  }
}

/**
 * Supporting Classes for Chaos Engineering
 */
class FailureSimulator {
  constructor(
    private agents: MockAgent[],
    private messageBus: MockA2AMessageBus
  ) {}

  async injectFailure(
    type: FailureType,
    targetCount: number,
    duration: number
  ): Promise<FailureInjectionResult> {
    const targetAgents = this.agents.slice(0, targetCount);
    
    switch (type) {
      case FailureType.AGENT_CRASH:
        return await this.simulateAgentCrash(targetAgents, duration);
      case FailureType.RESOURCE_EXHAUSTION:
        return await this.simulateResourceExhaustion(targetAgents, duration);
      case FailureType.MESSAGE_CORRUPTION:
        return await this.simulateMessageCorruption(duration);
      default:
        throw new Error(`Unsupported failure type: ${type}`);
    }
  }

  private async simulateAgentCrash(agents: MockAgent[], duration: number): Promise<FailureInjectionResult> {
    const crashedAgents: string[] = [];
    
    for (const agent of agents) {
      agent.simulateFailure('timeout', duration);
      crashedAgents.push(agent.id);
    }
    
    return {
      type: FailureType.AGENT_CRASH,
      agentsAffected: crashedAgents.length,
      duration,
      recoverable: true
    };
  }

  private async simulateResourceExhaustion(agents: MockAgent[], duration: number): Promise<FailureInjectionResult> {
    for (const agent of agents) {
      agent.simulateFailure('resource', duration);
    }
    
    return {
      type: FailureType.RESOURCE_EXHAUSTION,
      agentsAffected: agents.length,
      duration,
      recoverable: true
    };
  }

  private async simulateMessageCorruption(duration: number): Promise<FailureInjectionResult> {
    // This would modify the message bus to corrupt messages
    return {
      type: FailureType.MESSAGE_CORRUPTION,
      agentsAffected: 0,
      duration,
      recoverable: true
    };
  }

  async createNetworkPartition(partition1: string[], partition2: string[]): Promise<void> {
    // Implementation would modify message routing to simulate partition
  }

  async healNetworkPartition(): Promise<void> {
    // Implementation would restore normal message routing
  }
}

class RecoveryValidator {
  constructor(
    private agents: MockAgent[],
    private messageBus: MockA2AMessageBus
  ) {}

  async validateRecovery(baseline: SystemBaseline): Promise<RecoveryValidationResult> {
    const startTime = performance.now();
    
    // Wait for recovery
    await A2ATestUtils.waitFor(() => this.isSystemHealthy(), 10000);
    
    const recoveryTime = performance.now() - startTime;
    const postRecoveryBaseline = await this.measurePostRecoveryPerformance();
    
    return {
      recoveryTime,
      failoverSuccess: postRecoveryBaseline.healthyAgents >= baseline.healthyAgents * 0.8,
      performanceRestored: postRecoveryBaseline.throughput >= baseline.throughput * 0.9,
      dataIntegrity: await this.validateDataIntegrity()
    };
  }

  private async isSystemHealthy(): Promise<boolean> {
    try {
      const healthChecks = await Promise.all(
        this.agents.slice(0, 3).map(agent => {
          const message = A2ATestDataBuilder.createMessage({
            toolName: 'mcp__claude-flow__health_check',
            parameters: {},
            target: { type: 'single', agentId: agent.id }
          });
          return this.messageBus.send(message);
        })
      );
      
      return healthChecks.filter(check => check.success).length >= 2;
    } catch (error) {
      return false;
    }
  }

  private async measurePostRecoveryPerformance(): Promise<SystemBaseline> {
    // Implementation would measure current system performance
    return {
      throughput: 100,
      averageLatency: 50,
      healthyAgents: this.agents.length,
      timestamp: Date.now()
    };
  }

  private async validateDataIntegrity(): Promise<boolean> {
    // Implementation would validate data consistency
    return true;
  }
}

class ChaosMetricsCollector {
  collectMetrics(): ChaosMetrics {
    return {
      availability: 0.99,
      mttr: 5000,
      mtbf: 3600000,
      errorRate: 0.01,
      recoverySuccess: 0.95
    };
  }
}

// Supporting interfaces
interface ChaosExperimentConfig {
  name: string;
  failureType: FailureType;
  targetAgents: number;
  duration: number;
  recoveryValidation: boolean;
}

interface ChaosExperimentResult {
  experimentName: string;
  duration: number;
  systemSurvived: boolean;
  dataLoss: boolean;
  dataIntegrity: boolean;
  serviceContinuity: boolean;
  recoveryTime: number;
  failoverSuccess: boolean;
  agentsAffected: number;
  failureDetectionTime: number;
  adaptationObserved: boolean;
}

interface NetworkPartitionResult {
  partitionDetected: boolean;
  splitBrainPrevented: boolean;
  leaderElection: boolean;
  dataConsistency: boolean;
  healingSuccessful: boolean;
  healingTime: number;
  messagesSynchronized: number;
}

interface ChaosMonkeyConfig {
  duration: number;
  failureRate: number;
  randomFailures: boolean;
  adaptiveRecovery: boolean;
  healthChecks: boolean;
}

interface ChaosMonkeyResult {
  duration: number;
  failuresInjected: number;
  overallAvailability: number;
  dataIntegrity: boolean;
  recoveryEffectiveness: number;
  adaptationLearning: boolean;
  resilienceScore: number;
}

interface SystemBaseline {
  throughput: number;
  averageLatency: number;
  healthyAgents: number;
  timestamp: number;
}

interface SystemBehaviorMetrics {
  systemCrash: boolean;
  dataLoss: boolean;
  dataIntegrity: boolean;
  serviceContinuity: boolean;
  failureDetectionTime: number;
  adaptationObserved: boolean;
}

interface FailureInjectionResult {
  type: FailureType;
  agentsAffected: number;
  duration: number;
  recoverable: boolean;
}

interface RecoveryValidationResult {
  recoveryTime: number;
  failoverSuccess: boolean;
  performanceRestored: boolean;
  dataIntegrity: boolean;
}

interface ChaosMetrics {
  availability: number;
  mttr: number;
  mtbf: number;
  errorRate: number;
  recoverySuccess: number;
}