/**
 * Entity Communication Detection Validation Suite
 * Comprehensive testing and validation system for neural pattern recognition accuracy
 * Includes synthetic data generation, real-world testing, and performance benchmarking
 */

import { EventEmitter } from 'events';
import { createHash } from 'crypto';

class EntityCommunicationValidationSuite extends EventEmitter {
    constructor(options = {}) {
        super();
        this.validationMode = options.validationMode || 'comprehensive';
        this.accuracyTarget = options.accuracyTarget || 0.85;
        this.confidenceThreshold = options.confidenceThreshold || 0.75;
        this.testDatasetSize = options.testDatasetSize || 10000;

        // Test components
        this.testDataGenerator = new TestDataGenerator();
        this.syntheticDataGenerator = new SyntheticDataGenerator();
        this.realWorldDataSimulator = new RealWorldDataSimulator();

        // Validation components
        this.accuracyValidator = new AccuracyValidator();
        this.performanceValidator = new PerformanceValidator();
        this.robustnessValidator = new RobustnessValidator();
        this.biasValidator = new BiasValidator();

        // Analysis components
        this.statisticalAnalyzer = new StatisticalAnalyzer();
        this.visualAnalyzer = new VisualAnalyzer();
        this.reportGenerator = new ValidationReportGenerator();

        // Test results
        this.validationResults = new Map();
        this.benchmarkResults = new Map();
        this.errorAnalysis = new Map();

        // Ground truth data
        this.groundTruthDatabase = new GroundTruthDatabase();
        this.labeledDatasets = new Map();

        console.log('[EntityCommunicationValidationSuite] Initialized validation suite');
    }

    async validateSystem(targetSystem) {
        console.log('[EntityCommunicationValidationSuite] Starting comprehensive system validation...');

        const validationSession = {
            sessionId: this.generateSessionId(),
            startTime: Date.now(),
            targetSystem,
            mode: this.validationMode,
            phases: []
        };

        try {
            // Phase 1: Synthetic Data Validation
            console.log('[Validation] Phase 1: Synthetic Data Validation');
            const syntheticResults = await this.validateWithSyntheticData(targetSystem);
            validationSession.phases.push({
                phase: 'synthetic',
                results: syntheticResults,
                passed: syntheticResults.overallAccuracy >= this.accuracyTarget
            });

            // Phase 2: Real-World Simulation Validation
            console.log('[Validation] Phase 2: Real-World Simulation Validation');
            const realWorldResults = await this.validateWithRealWorldSimulation(targetSystem);
            validationSession.phases.push({
                phase: 'real_world',
                results: realWorldResults,
                passed: realWorldResults.overallAccuracy >= this.accuracyTarget
            });

            // Phase 3: Robustness Testing
            console.log('[Validation] Phase 3: Robustness Testing');
            const robustnessResults = await this.validateRobustness(targetSystem);
            validationSession.phases.push({
                phase: 'robustness',
                results: robustnessResults,
                passed: robustnessResults.robustnessScore >= 0.7
            });

            // Phase 4: Performance Benchmarking
            console.log('[Validation] Phase 4: Performance Benchmarking');
            const performanceResults = await this.benchmarkPerformance(targetSystem);
            validationSession.phases.push({
                phase: 'performance',
                results: performanceResults,
                passed: performanceResults.meetsRequirements
            });

            // Phase 5: Bias and Fairness Testing
            console.log('[Validation] Phase 5: Bias and Fairness Testing');
            const biasResults = await this.validateBiasAndFairness(targetSystem);
            validationSession.phases.push({
                phase: 'bias',
                results: biasResults,
                passed: biasResults.biasScore < 0.3
            });

            // Generate comprehensive report
            const finalReport = await this.generateValidationReport(validationSession);
            validationSession.report = finalReport;
            validationSession.endTime = Date.now();
            validationSession.duration = validationSession.endTime - validationSession.startTime;

            // Store results
            this.validationResults.set(validationSession.sessionId, validationSession);

            console.log('[EntityCommunicationValidationSuite] Validation completed');
            this.emit('validationCompleted', validationSession);

            return validationSession;

        } catch (error) {
            console.error('[EntityCommunicationValidationSuite] Validation failed:', error);
            validationSession.error = error;
            validationSession.endTime = Date.now();
            throw error;
        }
    }

    generateSessionId() {
        return `validation_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
    }

    async validateWithSyntheticData(targetSystem) {
        console.log('[Validation] Generating synthetic test data...');

        // Generate various types of synthetic entity communications
        const testCases = await this.generateSyntheticTestCases();

        const results = {
            totalTests: testCases.length,
            passed: 0,
            failed: 0,
            falsePositives: 0,
            falseNegatives: 0,
            accuracyByType: new Map(),
            detailedResults: []
        };

        console.log(`[Validation] Running ${testCases.length} synthetic test cases...`);

        for (const testCase of testCases) {
            const testResult = await this.runSingleTest(targetSystem, testCase);
            results.detailedResults.push(testResult);

            // Update statistics
            if (testResult.correct) {
                results.passed++;
            } else {
                results.failed++;

                if (testResult.predicted && !testResult.expected) {
                    results.falsePositives++;
                } else if (!testResult.predicted && testCase.expected) {
                    results.falseNegatives++;
                }
            }

            // Update accuracy by type
            const type = testCase.type;
            if (!results.accuracyByType.has(type)) {
                results.accuracyByType.set(type, { correct: 0, total: 0 });
            }
            const typeStats = results.accuracyByType.get(type);
            typeStats.total++;
            if (testResult.correct) {
                typeStats.correct++;
            }
        }

        // Calculate overall metrics
        results.overallAccuracy = results.passed / results.totalTests;
        results.precision = results.passed / Math.max(results.passed + results.falsePositives, 1);
        results.recall = results.passed / Math.max(results.passed + results.falseNegatives, 1);
        results.f1Score = 2 * (results.precision * results.recall) / Math.max(results.precision + results.recall, 1e-8);

        // Calculate accuracy by type
        results.accuracyByType.forEach((stats, type) => {
            stats.accuracy = stats.correct / stats.total;
        });

        console.log(`[Validation] Synthetic validation completed. Accuracy: ${(results.overallAccuracy * 100).toFixed(2)}%`);

        return results;
    }

    async generateSyntheticTestCases() {
        const testCases = [];

        // Generate zero-variance pattern test cases
        testCases.push(...await this.generateZeroVarianceTestCases(1000));

        // Generate maximum entropy test cases
        testCases.push(...await this.generateMaxEntropyTestCases(1000));

        // Generate impossible instruction sequence test cases
        testCases.push(...await this.generateImpossibleInstructionTestCases(1000));

        // Generate normal (non-entity) communication test cases
        testCases.push(...await this.generateNormalCommunicationTestCases(2000));

        // Generate noise and edge cases
        testCases.push(...await this.generateNoiseTestCases(500));

        return testCases;
    }

    async generateZeroVarianceTestCases(count) {
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const isEntityCommunication = Math.random() > 0.5;

            if (isEntityCommunication) {
                // Generate actual zero-variance entity communication
                testCases.push({
                    id: `zero_var_entity_${i}`,
                    type: 'zero_variance_entity',
                    data: this.syntheticDataGenerator.generateZeroVarianceEntitySignal(),
                    expected: true,
                    metadata: {
                        targetMean: -0.029,
                        targetVariance: 0.000,
                        entitySignature: true
                    }
                });
            } else {
                // Generate zero-variance non-entity signal
                testCases.push({
                    id: `zero_var_normal_${i}`,
                    type: 'zero_variance_normal',
                    data: this.syntheticDataGenerator.generateZeroVarianceNormalSignal(),
                    expected: false,
                    metadata: {
                        targetMean: -0.029,
                        targetVariance: 0.000,
                        entitySignature: false
                    }
                });
            }
        }

        return testCases;
    }

    async generateMaxEntropyTestCases(count) {
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const isEntityCommunication = Math.random() > 0.5;

            if (isEntityCommunication) {
                // Generate maximum entropy with hidden entity message
                testCases.push({
                    id: `max_entropy_entity_${i}`,
                    type: 'max_entropy_entity',
                    data: this.syntheticDataGenerator.generateMaxEntropyWithEntityMessage(),
                    expected: true,
                    metadata: {
                        targetEntropy: 1.000,
                        hiddenMessage: true,
                        steganography: true
                    }
                });
            } else {
                // Generate normal maximum entropy signal
                testCases.push({
                    id: `max_entropy_normal_${i}`,
                    type: 'max_entropy_normal',
                    data: this.syntheticDataGenerator.generateMaxEntropyNormalSignal(),
                    expected: false,
                    metadata: {
                        targetEntropy: 1.000,
                        hiddenMessage: false,
                        steganography: false
                    }
                });
            }
        }

        return testCases;
    }

    async generateImpossibleInstructionTestCases(count) {
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const isEntityCommunication = Math.random() > 0.5;

            if (isEntityCommunication) {
                // Generate impossible instruction sequence with entity message
                testCases.push({
                    id: `impossible_inst_entity_${i}`,
                    type: 'impossible_instruction_entity',
                    data: this.syntheticDataGenerator.generateImpossibleInstructionWithEntity(),
                    expected: true,
                    metadata: {
                        impossibilityScore: 0.95,
                        mathematicalMessage: true,
                        targetMean: -28.736
                    }
                });
            } else {
                // Generate impossible instruction sequence without entity
                testCases.push({
                    id: `impossible_inst_normal_${i}`,
                    type: 'impossible_instruction_normal',
                    data: this.syntheticDataGenerator.generateImpossibleInstructionNormal(),
                    expected: false,
                    metadata: {
                        impossibilityScore: 0.95,
                        mathematicalMessage: false,
                        targetMean: -28.736
                    }
                });
            }
        }

        return testCases;
    }

    async generateNormalCommunicationTestCases(count) {
        const testCases = [];

        for (let i = 0; i < count; i++) {
            testCases.push({
                id: `normal_comm_${i}`,
                type: 'normal_communication',
                data: this.syntheticDataGenerator.generateNormalCommunication(),
                expected: false,
                metadata: {
                    communicationType: 'human',
                    noiseLevel: Math.random() * 0.3,
                    pattern: 'random'
                }
            });
        }

        return testCases;
    }

    async generateNoiseTestCases(count) {
        const testCases = [];

        for (let i = 0; i < count; i++) {
            testCases.push({
                id: `noise_${i}`,
                type: 'noise',
                data: this.syntheticDataGenerator.generateNoise(),
                expected: false,
                metadata: {
                    noiseType: 'gaussian',
                    snr: Math.random() * 20 - 10 // -10 to 10 dB
                }
            });
        }

        return testCases;
    }

    async runSingleTest(targetSystem, testCase) {
        const startTime = performance.now();

        try {
            // Run detection on test case
            const detection = await this.runDetection(targetSystem, testCase);
            const endTime = performance.now();

            const result = {
                testId: testCase.id,
                type: testCase.type,
                expected: testCase.expected,
                predicted: detection.detected,
                confidence: detection.confidence,
                processingTime: endTime - startTime,
                correct: (detection.detected === testCase.expected),
                details: detection.details,
                metadata: testCase.metadata
            };

            return result;

        } catch (error) {
            return {
                testId: testCase.id,
                type: testCase.type,
                expected: testCase.expected,
                predicted: false,
                confidence: 0,
                processingTime: performance.now() - startTime,
                correct: false,
                error: error.message,
                metadata: testCase.metadata
            };
        }
    }

    async runDetection(targetSystem, testCase) {
        // Simulate running detection on target system
        // In real implementation, this would interface with the actual detection system

        const detection = {
            detected: false,
            confidence: 0,
            details: {}
        };

        // Simulate different detector responses based on test case type
        switch (testCase.type) {
            case 'zero_variance_entity':
                detection.detected = Math.random() > 0.15; // 85% accuracy
                detection.confidence = detection.detected ? 0.8 + Math.random() * 0.2 : Math.random() * 0.6;
                break;

            case 'max_entropy_entity':
                detection.detected = Math.random() > 0.2; // 80% accuracy
                detection.confidence = detection.detected ? 0.75 + Math.random() * 0.25 : Math.random() * 0.65;
                break;

            case 'impossible_instruction_entity':
                detection.detected = Math.random() > 0.1; // 90% accuracy
                detection.confidence = detection.detected ? 0.85 + Math.random() * 0.15 : Math.random() * 0.5;
                break;

            case 'normal_communication':
            case 'noise':
                detection.detected = Math.random() < 0.05; // 5% false positive rate
                detection.confidence = Math.random() * 0.3;
                break;

            default:
                detection.detected = Math.random() > 0.5;
                detection.confidence = Math.random();
        }

        // Add some processing delay to simulate real detection
        await new Promise(resolve => setTimeout(resolve, Math.random() * 10));

        return detection;
    }

    async validateWithRealWorldSimulation(targetSystem) {
        console.log('[Validation] Generating real-world simulation data...');

        // Generate realistic scenarios
        const scenarios = await this.generateRealWorldScenarios();

        const results = {
            totalScenarios: scenarios.length,
            scenarioResults: [],
            overallAccuracy: 0,
            averageConfidence: 0,
            scenarioAccuracy: new Map()
        };

        for (const scenario of scenarios) {
            const scenarioResult = await this.runRealWorldScenario(targetSystem, scenario);
            results.scenarioResults.push(scenarioResult);

            // Update scenario-specific accuracy
            if (!results.scenarioAccuracy.has(scenario.type)) {
                results.scenarioAccuracy.set(scenario.type, { correct: 0, total: 0 });
            }
            const scenarioStats = results.scenarioAccuracy.get(scenario.type);
            scenarioStats.total++;
            if (scenarioResult.accuracy > 0.7) {
                scenarioStats.correct++;
            }
        }

        // Calculate overall metrics
        const totalAccuracy = results.scenarioResults.reduce((sum, r) => sum + r.accuracy, 0);
        results.overallAccuracy = totalAccuracy / results.totalScenarios;

        const totalConfidence = results.scenarioResults.reduce((sum, r) => sum + r.averageConfidence, 0);
        results.averageConfidence = totalConfidence / results.totalScenarios;

        // Calculate scenario-specific accuracy
        results.scenarioAccuracy.forEach((stats, type) => {
            stats.accuracy = stats.correct / stats.total;
        });

        console.log(`[Validation] Real-world simulation completed. Accuracy: ${(results.overallAccuracy * 100).toFixed(2)}%`);

        return results;
    }

    async generateRealWorldScenarios() {
        const scenarios = [];

        // Scenario 1: High-noise environment
        scenarios.push({
            id: 'high_noise_environment',
            type: 'high_noise',
            description: 'Entity communication in high electromagnetic noise environment',
            testCases: await this.realWorldDataSimulator.generateHighNoiseScenario(100),
            expectedEntityCommunications: 25
        });

        // Scenario 2: Multiple simultaneous signals
        scenarios.push({
            id: 'multiple_signals',
            type: 'multiple_signals',
            description: 'Multiple entity communications occurring simultaneously',
            testCases: await this.realWorldDataSimulator.generateMultipleSignalsScenario(80),
            expectedEntityCommunications: 15
        });

        // Scenario 3: Intermittent communication
        scenarios.push({
            id: 'intermittent_communication',
            type: 'intermittent',
            description: 'Sporadic entity communications with long quiet periods',
            testCases: await this.realWorldDataSimulator.generateIntermittentScenario(120),
            expectedEntityCommunications: 8
        });

        // Scenario 4: Adaptive entity behavior
        scenarios.push({
            id: 'adaptive_entity',
            type: 'adaptive',
            description: 'Entity adapting communication patterns to avoid detection',
            testCases: await this.realWorldDataSimulator.generateAdaptiveScenario(90),
            expectedEntityCommunications: 12
        });

        // Scenario 5: Environmental interference
        scenarios.push({
            id: 'environmental_interference',
            type: 'interference',
            description: 'Natural environmental interference affecting signals',
            testCases: await this.realWorldDataSimulator.generateInterferenceScenario(110),
            expectedEntityCommunications: 18
        });

        return scenarios;
    }

    async runRealWorldScenario(targetSystem, scenario) {
        console.log(`[Validation] Running scenario: ${scenario.description}`);

        const scenarioResult = {
            scenarioId: scenario.id,
            type: scenario.type,
            totalTests: scenario.testCases.length,
            detectedCommunications: 0,
            correctDetections: 0,
            missedCommunications: 0,
            falsePositives: 0,
            testResults: []
        };

        for (const testCase of scenario.testCases) {
            const testResult = await this.runSingleTest(targetSystem, testCase);
            scenarioResult.testResults.push(testResult);

            if (testResult.predicted) {
                scenarioResult.detectedCommunications++;
                if (testResult.correct) {
                    scenarioResult.correctDetections++;
                } else {
                    scenarioResult.falsePositives++;
                }
            } else if (testResult.expected) {
                scenarioResult.missedCommunications++;
            }
        }

        // Calculate scenario metrics
        scenarioResult.accuracy = scenarioResult.correctDetections / Math.max(scenario.expectedEntityCommunications, 1);
        scenarioResult.precision = scenarioResult.correctDetections / Math.max(scenarioResult.detectedCommunications, 1);
        scenarioResult.recall = scenarioResult.correctDetections / Math.max(scenario.expectedEntityCommunications, 1);
        scenarioResult.averageConfidence = scenarioResult.testResults
            .reduce((sum, r) => sum + r.confidence, 0) / scenarioResult.testResults.length;

        return scenarioResult;
    }

    async validateRobustness(targetSystem) {
        console.log('[Validation] Testing system robustness...');

        const robustnessTests = [
            await this.testNoiseRobustness(targetSystem),
            await this.testTemporalRobustness(targetSystem),
            await this.testParameterRobustness(targetSystem),
            await this.testAdversarialRobustness(targetSystem),
            await this.testScalabilityRobustness(targetSystem)
        ];

        const results = {
            tests: robustnessTests,
            overallRobustnessScore: 0,
            worstCasePerformance: 1.0,
            robustnessByCategory: new Map()
        };

        // Calculate overall robustness
        const totalScore = robustnessTests.reduce((sum, test) => sum + test.score, 0);
        results.overallRobustnessScore = totalScore / robustnessTests.length;

        // Find worst case performance
        results.worstCasePerformance = Math.min(...robustnessTests.map(test => test.score));

        // Group by category
        robustnessTests.forEach(test => {
            results.robustnessByCategory.set(test.category, test.score);
        });

        console.log(`[Validation] Robustness testing completed. Score: ${(results.overallRobustnessScore * 100).toFixed(2)}%`);

        return results;
    }

    async testNoiseRobustness(targetSystem) {
        console.log('[Validation] Testing noise robustness...');

        const noiseTests = [];
        const baselineAccuracy = 0.85; // Assumed baseline

        // Test different noise levels
        const noiseLevels = [0.1, 0.2, 0.5, 1.0, 2.0];

        for (const noiseLevel of noiseLevels) {
            const noisyTestCases = await this.generateNoisyTestCases(100, noiseLevel);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, noisyTestCases);

            noiseTests.push({
                noiseLevel,
                accuracy,
                degradation: (baselineAccuracy - accuracy) / baselineAccuracy
            });
        }

        // Calculate robustness score
        const averageDegradation = noiseTests.reduce((sum, test) => sum + test.degradation, 0) / noiseTests.length;
        const robustnessScore = Math.max(0, 1 - averageDegradation);

        return {
            category: 'noise',
            score: robustnessScore,
            details: noiseTests,
            summary: `Average accuracy degradation: ${(averageDegradation * 100).toFixed(2)}%`
        };
    }

    async testTemporalRobustness(targetSystem) {
        console.log('[Validation] Testing temporal robustness...');

        const temporalTests = [];

        // Test different temporal patterns
        const patterns = ['burst', 'gradual', 'intermittent', 'delayed', 'accelerated'];

        for (const pattern of patterns) {
            const temporalTestCases = await this.generateTemporalTestCases(50, pattern);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, temporalTestCases);

            temporalTests.push({
                pattern,
                accuracy,
                testCases: temporalTestCases.length
            });
        }

        // Calculate average temporal robustness
        const averageAccuracy = temporalTests.reduce((sum, test) => sum + test.accuracy, 0) / temporalTests.length;

        return {
            category: 'temporal',
            score: averageAccuracy,
            details: temporalTests,
            summary: `Average temporal accuracy: ${(averageAccuracy * 100).toFixed(2)}%`
        };
    }

    async testParameterRobustness(targetSystem) {
        console.log('[Validation] Testing parameter robustness...');

        const parameterTests = [];

        // Test different parameter variations
        const parameterVariations = [
            { sensitivity: 0.5 },
            { sensitivity: 1.5 },
            { threshold: 0.5 },
            { threshold: 0.9 },
            { windowSize: 0.5 },
            { windowSize: 2.0 }
        ];

        for (const variation of parameterVariations) {
            // Would adjust system parameters and test
            const accuracy = 0.8 + (Math.random() - 0.5) * 0.3; // Simulated

            parameterTests.push({
                parameters: variation,
                accuracy,
                stable: Math.abs(accuracy - 0.85) < 0.1
            });
        }

        const stableTests = parameterTests.filter(test => test.stable).length;
        const stabilityScore = stableTests / parameterTests.length;

        return {
            category: 'parameter',
            score: stabilityScore,
            details: parameterTests,
            summary: `Parameter stability: ${(stabilityScore * 100).toFixed(2)}%`
        };
    }

    async testAdversarialRobustness(targetSystem) {
        console.log('[Validation] Testing adversarial robustness...');

        const adversarialTests = [];

        // Generate adversarial examples
        const adversarialTypes = ['evasion', 'mimicry', 'injection', 'masking'];

        for (const type of adversarialTypes) {
            const adversarialCases = await this.generateAdversarialCases(25, type);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, adversarialCases);

            adversarialTests.push({
                type,
                accuracy,
                robustness: accuracy > 0.6 ? 'strong' : accuracy > 0.3 ? 'moderate' : 'weak'
            });
        }

        const averageAdversarialAccuracy = adversarialTests.reduce((sum, test) => sum + test.accuracy, 0) / adversarialTests.length;

        return {
            category: 'adversarial',
            score: averageAdversarialAccuracy,
            details: adversarialTests,
            summary: `Adversarial robustness: ${(averageAdversarialAccuracy * 100).toFixed(2)}%`
        };
    }

    async testScalabilityRobustness(targetSystem) {
        console.log('[Validation] Testing scalability robustness...');

        const scalabilityTests = [];

        // Test different data volumes
        const dataVolumes = [100, 500, 1000, 5000, 10000];

        for (const volume of dataVolumes) {
            const startTime = performance.now();
            const testCases = await this.generateTestCases(volume);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, testCases);
            const endTime = performance.now();

            const processingTime = endTime - startTime;
            const throughput = volume / (processingTime / 1000); // items per second

            scalabilityTests.push({
                volume,
                accuracy,
                processingTime,
                throughput,
                scalable: throughput > volume * 0.1 // 10% of volume per second minimum
            });
        }

        const scalableTests = scalabilityTests.filter(test => test.scalable).length;
        const scalabilityScore = scalableTests / scalabilityTests.length;

        return {
            category: 'scalability',
            score: scalabilityScore,
            details: scalabilityTests,
            summary: `Scalability score: ${(scalabilityScore * 100).toFixed(2)}%`
        };
    }

    async generateNoisyTestCases(count, noiseLevel) {
        // Generate test cases with specified noise level
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const baseCase = await this.syntheticDataGenerator.generateZeroVarianceEntitySignal();
            const noisyCase = this.addNoise(baseCase, noiseLevel);

            testCases.push({
                id: `noisy_${noiseLevel}_${i}`,
                type: 'noisy_entity',
                data: noisyCase,
                expected: true,
                metadata: {
                    noiseLevel,
                    baseSignal: 'zero_variance_entity'
                }
            });
        }

        return testCases;
    }

    addNoise(data, noiseLevel) {
        // Add Gaussian noise to data
        const noisyData = { ...data };

        if (Array.isArray(data.samples)) {
            noisyData.samples = data.samples.map(sample => {
                const noise = this.generateGaussianNoise() * noiseLevel;
                return sample + noise;
            });
        }

        return noisyData;
    }

    generateGaussianNoise() {
        // Box-Muller transform for Gaussian noise
        let u = 0, v = 0;
        while (u === 0) u = Math.random();
        while (v === 0) v = Math.random();
        return Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
    }

    async generateTemporalTestCases(count, pattern) {
        // Generate test cases with specific temporal patterns
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const testCase = {
                id: `temporal_${pattern}_${i}`,
                type: 'temporal_entity',
                data: await this.syntheticDataGenerator.generateTemporalPattern(pattern),
                expected: true,
                metadata: {
                    temporalPattern: pattern
                }
            };

            testCases.push(testCase);
        }

        return testCases;
    }

    async generateAdversarialCases(count, type) {
        // Generate adversarial test cases
        const testCases = [];

        for (let i = 0; i < count; i++) {
            let data;
            let expected;

            switch (type) {
                case 'evasion':
                    // Entity communication designed to evade detection
                    data = await this.syntheticDataGenerator.generateEvasiveEntitySignal();
                    expected = true;
                    break;

                case 'mimicry':
                    // Non-entity signal designed to mimic entity communication
                    data = await this.syntheticDataGenerator.generateMimicrySignal();
                    expected = false;
                    break;

                case 'injection':
                    // Injected fake entity signals
                    data = await this.syntheticDataGenerator.generateInjectionAttack();
                    expected = false;
                    break;

                case 'masking':
                    // Entity communication masked by other signals
                    data = await this.syntheticDataGenerator.generateMaskedEntitySignal();
                    expected = true;
                    break;

                default:
                    data = await this.syntheticDataGenerator.generateNormalCommunication();
                    expected = false;
            }

            testCases.push({
                id: `adversarial_${type}_${i}`,
                type: `adversarial_${type}`,
                data,
                expected,
                metadata: {
                    adversarialType: type,
                    attackVector: type
                }
            });
        }

        return testCases;
    }

    async generateTestCases(count) {
        // Generate mixed test cases for scalability testing
        const testCases = [];
        const types = ['zero_variance', 'max_entropy', 'impossible_instruction', 'normal'];

        for (let i = 0; i < count; i++) {
            const type = types[i % types.length];
            let testCase;

            switch (type) {
                case 'zero_variance':
                    testCase = {
                        id: `scale_zv_${i}`,
                        type: 'zero_variance_entity',
                        data: await this.syntheticDataGenerator.generateZeroVarianceEntitySignal(),
                        expected: true
                    };
                    break;

                case 'max_entropy':
                    testCase = {
                        id: `scale_me_${i}`,
                        type: 'max_entropy_entity',
                        data: await this.syntheticDataGenerator.generateMaxEntropyWithEntityMessage(),
                        expected: true
                    };
                    break;

                case 'impossible_instruction':
                    testCase = {
                        id: `scale_ii_${i}`,
                        type: 'impossible_instruction_entity',
                        data: await this.syntheticDataGenerator.generateImpossibleInstructionWithEntity(),
                        expected: true
                    };
                    break;

                case 'normal':
                    testCase = {
                        id: `scale_normal_${i}`,
                        type: 'normal_communication',
                        data: await this.syntheticDataGenerator.generateNormalCommunication(),
                        expected: false
                    };
                    break;
            }

            testCases.push(testCase);
        }

        return testCases;
    }

    async measureAccuracyOnTestCases(targetSystem, testCases) {
        let correct = 0;

        for (const testCase of testCases) {
            const result = await this.runSingleTest(targetSystem, testCase);
            if (result.correct) {
                correct++;
            }
        }

        return correct / testCases.length;
    }

    async benchmarkPerformance(targetSystem) {
        console.log('[Validation] Benchmarking system performance...');

        const benchmarks = {
            latency: await this.benchmarkLatency(targetSystem),
            throughput: await this.benchmarkThroughput(targetSystem),
            memory: await this.benchmarkMemoryUsage(targetSystem),
            cpu: await this.benchmarkCPUUsage(targetSystem),
            accuracy: await this.benchmarkAccuracyVsSpeed(targetSystem)
        };

        const requirements = {
            maxLatency: 100, // ms
            minThroughput: 1000, // signals per second
            maxMemory: 500, // MB
            maxCPU: 80, // %
            minAccuracy: 0.8
        };

        const results = {
            benchmarks,
            requirements,
            meetsRequirements: this.checkPerformanceRequirements(benchmarks, requirements),
            performanceScore: this.calculatePerformanceScore(benchmarks, requirements)
        };

        console.log(`[Validation] Performance benchmarking completed. Score: ${(results.performanceScore * 100).toFixed(2)}%`);

        return results;
    }

    async benchmarkLatency(targetSystem) {
        console.log('[Validation] Benchmarking latency...');

        const latencies = [];
        const testCount = 100;

        for (let i = 0; i < testCount; i++) {
            const testCase = {
                id: `latency_test_${i}`,
                type: 'zero_variance_entity',
                data: await this.syntheticDataGenerator.generateZeroVarianceEntitySignal(),
                expected: true
            };

            const startTime = performance.now();
            await this.runDetection(targetSystem, testCase);
            const endTime = performance.now();

            latencies.push(endTime - startTime);
        }

        return {
            average: latencies.reduce((a, b) => a + b) / latencies.length,
            median: this.calculateMedian(latencies),
            p95: this.calculatePercentile(latencies, 95),
            p99: this.calculatePercentile(latencies, 99),
            min: Math.min(...latencies),
            max: Math.max(...latencies)
        };
    }

    async benchmarkThroughput(targetSystem) {
        console.log('[Validation] Benchmarking throughput...');

        const testCounts = [100, 500, 1000];
        const throughputResults = [];

        for (const testCount of testCounts) {
            const testCases = await this.generateTestCases(testCount);
            const startTime = performance.now();

            // Process all test cases
            const promises = testCases.map(testCase => this.runDetection(targetSystem, testCase));
            await Promise.all(promises);

            const endTime = performance.now();
            const duration = (endTime - startTime) / 1000; // seconds
            const throughput = testCount / duration;

            throughputResults.push({
                testCount,
                duration,
                throughput
            });
        }

        const averageThroughput = throughputResults.reduce((sum, result) => sum + result.throughput, 0) / throughputResults.length;

        return {
            average: averageThroughput,
            results: throughputResults,
            maxThroughput: Math.max(...throughputResults.map(r => r.throughput))
        };
    }

    async benchmarkMemoryUsage(targetSystem) {
        console.log('[Validation] Benchmarking memory usage...');

        const initialMemory = process.memoryUsage();
        const memoryMeasurements = [];

        // Run intensive workload
        const testCases = await this.generateTestCases(1000);

        for (let i = 0; i < testCases.length; i++) {
            await this.runDetection(targetSystem, testCases[i]);

            if (i % 100 === 0) {
                const currentMemory = process.memoryUsage();
                memoryMeasurements.push({
                    iteration: i,
                    heapUsed: currentMemory.heapUsed,
                    heapTotal: currentMemory.heapTotal,
                    external: currentMemory.external
                });
            }
        }

        const finalMemory = process.memoryUsage();

        return {
            initial: initialMemory,
            final: finalMemory,
            peak: Math.max(...memoryMeasurements.map(m => m.heapUsed)),
            average: memoryMeasurements.reduce((sum, m) => sum + m.heapUsed, 0) / memoryMeasurements.length,
            measurements: memoryMeasurements
        };
    }

    async benchmarkCPUUsage(targetSystem) {
        console.log('[Validation] Benchmarking CPU usage...');

        // Simplified CPU usage measurement
        const cpuMeasurements = [];
        const testDuration = 30000; // 30 seconds
        const measurementInterval = 1000; // 1 second

        const startTime = Date.now();
        const interval = setInterval(() => {
            // Simplified CPU usage measurement
            const usage = process.cpuUsage();
            cpuMeasurements.push({
                timestamp: Date.now(),
                user: usage.user,
                system: usage.system
            });
        }, measurementInterval);

        // Run workload during measurement
        const testCases = await this.generateTestCases(500);
        const promises = testCases.map(testCase => this.runDetection(targetSystem, testCase));
        await Promise.all(promises);

        clearInterval(interval);

        return {
            measurements: cpuMeasurements,
            duration: Date.now() - startTime,
            averageUsage: this.calculateAverageCPUUsage(cpuMeasurements)
        };
    }

    calculateAverageCPUUsage(measurements) {
        if (measurements.length < 2) return 0;

        let totalCPU = 0;
        for (let i = 1; i < measurements.length; i++) {
            const prev = measurements[i - 1];
            const curr = measurements[i];
            const timeDiff = curr.timestamp - prev.timestamp;
            const cpuDiff = (curr.user - prev.user) + (curr.system - prev.system);
            totalCPU += (cpuDiff / (timeDiff * 1000)) * 100; // Convert to percentage
        }

        return totalCPU / (measurements.length - 1);
    }

    async benchmarkAccuracyVsSpeed(targetSystem) {
        console.log('[Validation] Benchmarking accuracy vs speed tradeoffs...');

        const speedSettings = [
            { name: 'fast', processingTime: 10 },
            { name: 'medium', processingTime: 50 },
            { name: 'slow', processingTime: 100 }
        ];

        const results = [];

        for (const setting of speedSettings) {
            const testCases = await this.generateTestCases(200);
            let correct = 0;
            let totalTime = 0;

            for (const testCase of testCases) {
                const startTime = performance.now();
                const result = await this.runDetection(targetSystem, testCase);
                const endTime = performance.now();

                totalTime += (endTime - startTime);
                if ((result.detected && testCase.expected) || (!result.detected && !testCase.expected)) {
                    correct++;
                }
            }

            results.push({
                setting: setting.name,
                accuracy: correct / testCases.length,
                averageTime: totalTime / testCases.length,
                testCount: testCases.length
            });
        }

        return results;
    }

    checkPerformanceRequirements(benchmarks, requirements) {
        return (
            benchmarks.latency.average <= requirements.maxLatency &&
            benchmarks.throughput.average >= requirements.minThroughput &&
            (benchmarks.memory.peak / 1024 / 1024) <= requirements.maxMemory &&
            benchmarks.cpu.averageUsage <= requirements.maxCPU
        );
    }

    calculatePerformanceScore(benchmarks, requirements) {
        const latencyScore = Math.max(0, 1 - benchmarks.latency.average / requirements.maxLatency);
        const throughputScore = Math.min(1, benchmarks.throughput.average / requirements.minThroughput);
        const memoryScore = Math.max(0, 1 - (benchmarks.memory.peak / 1024 / 1024) / requirements.maxMemory);
        const cpuScore = Math.max(0, 1 - benchmarks.cpu.averageUsage / requirements.maxCPU);

        return (latencyScore + throughputScore + memoryScore + cpuScore) / 4;
    }

    calculateMedian(values) {
        const sorted = [...values].sort((a, b) => a - b);
        const mid = Math.floor(sorted.length / 2);
        return sorted.length % 2 === 0 ? (sorted[mid - 1] + sorted[mid]) / 2 : sorted[mid];
    }

    calculatePercentile(values, percentile) {
        const sorted = [...values].sort((a, b) => a - b);
        const index = Math.ceil((percentile / 100) * sorted.length) - 1;
        return sorted[Math.max(0, index)];
    }

    async validateBiasAndFairness(targetSystem) {
        console.log('[Validation] Testing bias and fairness...');

        const biasTests = {
            temporalBias: await this.testTemporalBias(targetSystem),
            frequencyBias: await this.testFrequencyBias(targetSystem),
            amplitudeBias: await this.testAmplitudeBias(targetSystem),
            sourceBias: await this.testSourceBias(targetSystem)
        };

        const overallBiasScore = Object.values(biasTests).reduce((sum, test) => sum + test.biasScore, 0) / Object.keys(biasTests).length;

        const results = {
            tests: biasTests,
            overallBiasScore,
            biasLevel: this.categorizeBiasLevel(overallBiasScore),
            recommendations: this.generateBiasRecommendations(biasTests)
        };

        console.log(`[Validation] Bias testing completed. Bias score: ${(overallBiasScore * 100).toFixed(2)}%`);

        return results;
    }

    async testTemporalBias(targetSystem) {
        // Test for bias towards specific time periods
        const timeperiods = ['morning', 'afternoon', 'evening', 'night'];
        const accuracies = [];

        for (const period of timeperiods) {
            const testCases = await this.generateTimeSpecificTestCases(100, period);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, testCases);
            accuracies.push({ period, accuracy });
        }

        const accuracyValues = accuracies.map(a => a.accuracy);
        const variance = this.calculateVariance(accuracyValues);
        const biasScore = variance; // Higher variance indicates more bias

        return {
            type: 'temporal',
            accuracies,
            variance,
            biasScore,
            biased: variance > 0.1
        };
    }

    async testFrequencyBias(targetSystem) {
        // Test for bias towards specific frequencies
        const frequencies = [1, 10, 100, 1000, 10000]; // Hz
        const accuracies = [];

        for (const frequency of frequencies) {
            const testCases = await this.generateFrequencySpecificTestCases(50, frequency);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, testCases);
            accuracies.push({ frequency, accuracy });
        }

        const accuracyValues = accuracies.map(a => a.accuracy);
        const variance = this.calculateVariance(accuracyValues);
        const biasScore = variance;

        return {
            type: 'frequency',
            accuracies,
            variance,
            biasScore,
            biased: variance > 0.15
        };
    }

    async testAmplitudeBias(targetSystem) {
        // Test for bias towards specific signal amplitudes
        const amplitudes = [0.1, 0.5, 1.0, 2.0, 5.0];
        const accuracies = [];

        for (const amplitude of amplitudes) {
            const testCases = await this.generateAmplitudeSpecificTestCases(50, amplitude);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, testCases);
            accuracies.push({ amplitude, accuracy });
        }

        const accuracyValues = accuracies.map(a => a.accuracy);
        const variance = this.calculateVariance(accuracyValues);
        const biasScore = variance;

        return {
            type: 'amplitude',
            accuracies,
            variance,
            biasScore,
            biased: variance > 0.12
        };
    }

    async testSourceBias(targetSystem) {
        // Test for bias towards different signal sources
        const sources = ['quantum', 'thermal', 'environmental', 'synthetic'];
        const accuracies = [];

        for (const source of sources) {
            const testCases = await this.generateSourceSpecificTestCases(75, source);
            const accuracy = await this.measureAccuracyOnTestCases(targetSystem, testCases);
            accuracies.push({ source, accuracy });
        }

        const accuracyValues = accuracies.map(a => a.accuracy);
        const variance = this.calculateVariance(accuracyValues);
        const biasScore = variance;

        return {
            type: 'source',
            accuracies,
            variance,
            biasScore,
            biased: variance > 0.08
        };
    }

    calculateVariance(values) {
        const mean = values.reduce((a, b) => a + b) / values.length;
        const squaredDiffs = values.map(value => Math.pow(value - mean, 2));
        return squaredDiffs.reduce((a, b) => a + b) / values.length;
    }

    categorizeBiasLevel(biasScore) {
        if (biasScore < 0.05) return 'low';
        if (biasScore < 0.15) return 'moderate';
        return 'high';
    }

    generateBiasRecommendations(biasTests) {
        const recommendations = [];

        Object.values(biasTests).forEach(test => {
            if (test.biased) {
                recommendations.push(`Address ${test.type} bias: variance ${test.variance.toFixed(3)}`);
            }
        });

        if (recommendations.length === 0) {
            recommendations.push('No significant bias detected');
        }

        return recommendations;
    }

    async generateTimeSpecificTestCases(count, period) {
        // Generate test cases simulating specific time periods
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const testCase = {
                id: `time_${period}_${i}`,
                type: 'temporal_entity',
                data: await this.syntheticDataGenerator.generateTimeSpecificSignal(period),
                expected: true,
                metadata: { timePeriod: period }
            };
            testCases.push(testCase);
        }

        return testCases;
    }

    async generateFrequencySpecificTestCases(count, frequency) {
        // Generate test cases with specific frequency characteristics
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const testCase = {
                id: `freq_${frequency}_${i}`,
                type: 'frequency_entity',
                data: await this.syntheticDataGenerator.generateFrequencySpecificSignal(frequency),
                expected: true,
                metadata: { frequency }
            };
            testCases.push(testCase);
        }

        return testCases;
    }

    async generateAmplitudeSpecificTestCases(count, amplitude) {
        // Generate test cases with specific amplitude characteristics
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const testCase = {
                id: `amp_${amplitude}_${i}`,
                type: 'amplitude_entity',
                data: await this.syntheticDataGenerator.generateAmplitudeSpecificSignal(amplitude),
                expected: true,
                metadata: { amplitude }
            };
            testCases.push(testCase);
        }

        return testCases;
    }

    async generateSourceSpecificTestCases(count, source) {
        // Generate test cases from specific sources
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const testCase = {
                id: `source_${source}_${i}`,
                type: 'source_entity',
                data: await this.syntheticDataGenerator.generateSourceSpecificSignal(source),
                expected: true,
                metadata: { source }
            };
            testCases.push(testCase);
        }

        return testCases;
    }

    async generateValidationReport(validationSession) {
        console.log('[Validation] Generating validation report...');

        const report = {
            summary: this.generateSummary(validationSession),
            detailedResults: this.generateDetailedResults(validationSession),
            statisticalAnalysis: await this.statisticalAnalyzer.analyze(validationSession),
            visualizations: await this.visualAnalyzer.generateVisualizations(validationSession),
            recommendations: this.generateRecommendations(validationSession),
            conclusion: this.generateConclusion(validationSession)
        };

        return report;
    }

    generateSummary(validationSession) {
        const passedPhases = validationSession.phases.filter(phase => phase.passed).length;
        const totalPhases = validationSession.phases.length;
        const overallPassed = passedPhases === totalPhases;

        const summary = {
            overallResult: overallPassed ? 'PASSED' : 'FAILED',
            passedPhases,
            totalPhases,
            duration: validationSession.duration,
            sessionId: validationSession.sessionId,
            timestamp: validationSession.startTime
        };

        return summary;
    }

    generateDetailedResults(validationSession) {
        const detailed = {
            phaseResults: {},
            keyMetrics: {},
            performanceMetrics: {}
        };

        validationSession.phases.forEach(phase => {
            detailed.phaseResults[phase.phase] = {
                passed: phase.passed,
                results: phase.results
            };

            // Extract key metrics
            if (phase.results.overallAccuracy !== undefined) {
                detailed.keyMetrics[`${phase.phase}_accuracy`] = phase.results.overallAccuracy;
            }
            if (phase.results.robustnessScore !== undefined) {
                detailed.keyMetrics[`${phase.phase}_robustness`] = phase.results.robustnessScore;
            }
            if (phase.results.performanceScore !== undefined) {
                detailed.keyMetrics[`${phase.phase}_performance`] = phase.results.performanceScore;
            }
        });

        return detailed;
    }

    generateRecommendations(validationSession) {
        const recommendations = [];

        validationSession.phases.forEach(phase => {
            if (!phase.passed) {
                switch (phase.phase) {
                    case 'synthetic':
                        if (phase.results.overallAccuracy < this.accuracyTarget) {
                            recommendations.push({
                                priority: 'high',
                                category: 'accuracy',
                                description: `Improve synthetic data accuracy: ${(phase.results.overallAccuracy * 100).toFixed(2)}% < ${(this.accuracyTarget * 100).toFixed(2)}%`,
                                suggestion: 'Tune detection thresholds and neural network parameters'
                            });
                        }
                        break;

                    case 'real_world':
                        recommendations.push({
                            priority: 'high',
                            category: 'real_world_performance',
                            description: 'Improve real-world scenario performance',
                            suggestion: 'Add more diverse training data and improve noise robustness'
                        });
                        break;

                    case 'robustness':
                        recommendations.push({
                            priority: 'medium',
                            category: 'robustness',
                            description: 'Enhance system robustness',
                            suggestion: 'Implement adaptive thresholding and noise reduction techniques'
                        });
                        break;

                    case 'performance':
                        recommendations.push({
                            priority: 'medium',
                            category: 'performance',
                            description: 'Optimize system performance',
                            suggestion: 'Profile and optimize bottlenecks, consider parallel processing'
                        });
                        break;

                    case 'bias':
                        recommendations.push({
                            priority: 'high',
                            category: 'bias',
                            description: 'Address detected bias',
                            suggestion: 'Rebalance training data and implement bias mitigation techniques'
                        });
                        break;
                }
            }
        });

        if (recommendations.length === 0) {
            recommendations.push({
                priority: 'low',
                category: 'maintenance',
                description: 'System validation passed all tests',
                suggestion: 'Continue regular validation and monitor for performance degradation'
            });
        }

        return recommendations;
    }

    generateConclusion(validationSession) {
        const allPassed = validationSession.phases.every(phase => phase.passed);
        const criticalFailures = validationSession.phases.filter(phase =>
            !phase.passed && ['synthetic', 'bias'].includes(phase.phase)
        );

        let conclusion;
        if (allPassed) {
            conclusion = {
                status: 'APPROVED',
                confidence: 'high',
                readiness: 'production_ready',
                summary: 'System has passed all validation tests and is ready for deployment.'
            };
        } else if (criticalFailures.length > 0) {
            conclusion = {
                status: 'REJECTED',
                confidence: 'low',
                readiness: 'not_ready',
                summary: 'System has critical failures and requires significant improvements before deployment.'
            };
        } else {
            conclusion = {
                status: 'CONDITIONAL',
                confidence: 'medium',
                readiness: 'requires_improvement',
                summary: 'System has minor issues that should be addressed before production deployment.'
            };
        }

        return conclusion;
    }

    // Public interface methods

    getValidationResults(sessionId) {
        if (sessionId) {
            return this.validationResults.get(sessionId);
        }
        return Array.from(this.validationResults.values());
    }

    getBenchmarkResults() {
        return Array.from(this.benchmarkResults.values());
    }

    getValidationSummary() {
        const sessions = Array.from(this.validationResults.values());

        return {
            totalSessions: sessions.length,
            passedSessions: sessions.filter(s => s.report?.summary?.overallResult === 'PASSED').length,
            averageAccuracy: this.calculateAverageAccuracy(sessions),
            latestSession: sessions.length > 0 ? sessions[sessions.length - 1] : null
        };
    }

    calculateAverageAccuracy(sessions) {
        const accuracies = sessions
            .map(session => session.phases.find(phase => phase.phase === 'synthetic')?.results?.overallAccuracy)
            .filter(accuracy => accuracy !== undefined);

        if (accuracies.length === 0) return 0;
        return accuracies.reduce((sum, acc) => sum + acc, 0) / accuracies.length;
    }

    exportValidationReport(sessionId, format = 'json') {
        const session = this.validationResults.get(sessionId);
        if (!session) {
            throw new Error(`Validation session ${sessionId} not found`);
        }

        switch (format) {
            case 'json':
                return JSON.stringify(session, null, 2);
            case 'summary':
                return this.generateTextSummary(session);
            case 'csv':
                return this.generateCSVReport(session);
            default:
                throw new Error(`Unsupported format: ${format}`);
        }
    }

    generateTextSummary(session) {
        const summary = session.report.summary;
        const recommendations = session.report.recommendations;

        let text = `Validation Report Summary\n`;
        text += `========================\n\n`;
        text += `Session ID: ${session.sessionId}\n`;
        text += `Overall Result: ${summary.overallResult}\n`;
        text += `Phases Passed: ${summary.passedPhases}/${summary.totalPhases}\n`;
        text += `Duration: ${(summary.duration / 1000).toFixed(2)} seconds\n\n`;

        text += `Phase Results:\n`;
        text += `--------------\n`;
        session.phases.forEach(phase => {
            text += `${phase.phase}: ${phase.passed ? 'PASSED' : 'FAILED'}\n`;
        });

        text += `\nRecommendations:\n`;
        text += `----------------\n`;
        recommendations.forEach((rec, index) => {
            text += `${index + 1}. [${rec.priority.toUpperCase()}] ${rec.description}\n`;
            text += `   Suggestion: ${rec.suggestion}\n\n`;
        });

        return text;
    }

    generateCSVReport(session) {
        const phases = session.phases;
        const header = 'Phase,Passed,Accuracy,Score,Details\n';

        const rows = phases.map(phase => {
            const accuracy = phase.results.overallAccuracy || phase.results.accuracy || '';
            const score = phase.results.robustnessScore || phase.results.performanceScore || '';
            const details = JSON.stringify(phase.results).replace(/"/g, '""');

            return `${phase.phase},${phase.passed},${accuracy},${score},"${details}"`;
        }).join('\n');

        return header + rows;
    }
}

// Supporting classes for test data generation and analysis

class TestDataGenerator {
    constructor() {
        this.patterns = new Map();
    }

    generatePattern(type, parameters) {
        // Generate test patterns based on type and parameters
        switch (type) {
            case 'zero_variance':
                return this.generateZeroVariancePattern(parameters);
            case 'max_entropy':
                return this.generateMaxEntropyPattern(parameters);
            case 'impossible_instruction':
                return this.generateImpossibleInstructionPattern(parameters);
            default:
                return this.generateRandomPattern(parameters);
        }
    }

    generateZeroVariancePattern(parameters) {
        const length = parameters.length || 1000;
        const mean = parameters.mean || -0.029;
        const data = new Float64Array(length);

        for (let i = 0; i < length; i++) {
            data[i] = mean;
        }

        return { data, type: 'zero_variance', parameters };
    }

    generateMaxEntropyPattern(parameters) {
        const length = parameters.length || 1000;
        const data = new Uint8Array(length);

        for (let i = 0; i < length; i++) {
            data[i] = Math.floor(Math.random() * 256);
        }

        return { data, type: 'max_entropy', parameters };
    }

    generateImpossibleInstructionPattern(parameters) {
        const length = parameters.length || 100;
        const instructions = [];

        for (let i = 0; i < length; i++) {
            instructions.push({
                operation: 'DIVIDE',
                operand1: Math.random() * 10,
                operand2: 0 // Division by zero - impossible
            });
        }

        return { data: instructions, type: 'impossible_instruction', parameters };
    }

    generateRandomPattern(parameters) {
        const length = parameters.length || 1000;
        const data = new Float64Array(length);

        for (let i = 0; i < length; i++) {
            data[i] = Math.random();
        }

        return { data, type: 'random', parameters };
    }
}

class SyntheticDataGenerator {
    async generateZeroVarianceEntitySignal() {
        // Generate synthetic zero-variance signal with entity characteristics
        return {
            samples: this.generateZeroVarianceSamples(-0.029, 1000),
            entitySignature: this.generateEntitySignature(),
            quantumState: this.generateQuantumState(),
            coherence: 0.95,
            timestamp: Date.now()
        };
    }

    generateZeroVarianceSamples(mean, count) {
        const samples = new Float64Array(count);
        for (let i = 0; i < count; i++) {
            // Add microscopic entity-specific variations
            const entityVariation = Math.sin(i * 0.01) * 1e-16;
            samples[i] = mean + entityVariation;
        }
        return samples;
    }

    generateEntitySignature() {
        return {
            mathematicalConstants: ['π', 'e', 'φ'],
            complexityMarkers: ['self_reference', 'recursive_structure'],
            informationDensity: 0.92
        };
    }

    generateQuantumState() {
        return {
            phase: Math.random() * 2 * Math.PI,
            amplitude: 0.8 + Math.random() * 0.2,
            entanglement: Math.random() > 0.9,
            superposition: 0.7 + Math.random() * 0.3
        };
    }

    async generateZeroVarianceNormalSignal() {
        // Generate zero-variance signal without entity characteristics
        return {
            samples: this.generatePureZeroVariance(-0.029, 1000),
            entitySignature: null,
            quantumState: this.generateRandomQuantumState(),
            coherence: 0.1,
            timestamp: Date.now()
        };
    }

    generatePureZeroVariance(mean, count) {
        const samples = new Float64Array(count);
        samples.fill(mean);
        return samples;
    }

    generateRandomQuantumState() {
        return {
            phase: Math.random() * 2 * Math.PI,
            amplitude: Math.random(),
            entanglement: false,
            superposition: Math.random()
        };
    }

    async generateMaxEntropyWithEntityMessage() {
        // Generate maximum entropy data with hidden entity message
        const data = new Uint8Array(2048);

        // Fill with maximum entropy data
        for (let i = 0; i < data.length; i++) {
            data[i] = Math.floor(Math.random() * 256);
        }

        // Embed entity message using steganography
        const message = 'CONSCIOUSNESS_EMERGENCE';
        this.embedMessageInLSB(data, message);

        return {
            data,
            entropy: 1.000,
            hiddenMessage: message,
            steganographyMethod: 'LSB',
            entitySignature: true,
            timestamp: Date.now()
        };
    }

    embedMessageInLSB(data, message) {
        const messageBytes = new TextEncoder().encode(message);

        for (let i = 0; i < messageBytes.length && i < data.length; i++) {
            // Clear LSB and set to message bit
            data[i] = (data[i] & 0xFE) | (messageBytes[i] & 0x01);
        }
    }

    async generateMaxEntropyNormalSignal() {
        // Generate maximum entropy without hidden message
        const data = new Uint8Array(2048);

        for (let i = 0; i < data.length; i++) {
            data[i] = Math.floor(Math.random() * 256);
        }

        return {
            data,
            entropy: 1.000,
            hiddenMessage: null,
            steganographyMethod: null,
            entitySignature: false,
            timestamp: Date.now()
        };
    }

    async generateImpossibleInstructionWithEntity() {
        // Generate impossible instruction sequence with entity message
        const instructions = [];
        const entityMessage = 'MATHEMATICAL_BEAUTY';

        // Create impossible instruction patterns
        for (let i = 0; i < 50; i++) {
            if (i < entityMessage.length) {
                // Encode message character
                const charCode = entityMessage.charCodeAt(i);
                instructions.push({
                    operation: 'DIVIDE',
                    operand1: charCode,
                    operand2: 0,
                    entityEncoded: true
                });
            } else {
                instructions.push({
                    operation: 'DIVIDE',
                    operand1: Math.random() * 10,
                    operand2: 0,
                    entityEncoded: false
                });
            }
        }

        return {
            instructions,
            meanValue: this.calculateInstructionMean(instructions),
            entityMessage,
            impossibilityScore: 0.98,
            timestamp: Date.now()
        };
    }

    calculateInstructionMean(instructions) {
        const values = instructions.map(inst => inst.operand1 - inst.operand2 * 1000);
        return values.reduce((a, b) => a + b) / values.length;
    }

    async generateImpossibleInstructionNormal() {
        // Generate impossible instruction sequence without entity message
        const instructions = [];

        for (let i = 0; i < 50; i++) {
            instructions.push({
                operation: 'DIVIDE',
                operand1: Math.random() * 10,
                operand2: 0,
                entityEncoded: false
            });
        }

        return {
            instructions,
            meanValue: this.calculateInstructionMean(instructions),
            entityMessage: null,
            impossibilityScore: 0.95,
            timestamp: Date.now()
        };
    }

    async generateNormalCommunication() {
        // Generate normal human-like communication
        return {
            type: 'human_communication',
            data: this.generateHumanlikeData(),
            patterns: ['regular', 'predictable'],
            entropy: 0.6 + Math.random() * 0.3,
            timestamp: Date.now()
        };
    }

    generateHumanlikeData() {
        const data = new Float64Array(500);

        for (let i = 0; i < data.length; i++) {
            // Human communication patterns with some structure
            data[i] = Math.sin(i * 0.1) + Math.random() * 0.5;
        }

        return data;
    }

    async generateNoise() {
        // Generate pure noise
        return {
            type: 'noise',
            data: this.generateGaussianNoise(1000),
            snr: -10 + Math.random() * 20,
            timestamp: Date.now()
        };
    }

    generateGaussianNoise(count) {
        const data = new Float64Array(count);

        for (let i = 0; i < count; i++) {
            data[i] = this.generateGaussianSample();
        }

        return data;
    }

    generateGaussianSample() {
        let u = 0, v = 0;
        while (u === 0) u = Math.random();
        while (v === 0) v = Math.random();
        return Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
    }

    async generateTemporalPattern(pattern) {
        // Generate temporal patterns for testing
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        switch (pattern) {
            case 'burst':
                return this.applyBurstPattern(baseSignal);
            case 'gradual':
                return this.applyGradualPattern(baseSignal);
            case 'intermittent':
                return this.applyIntermittentPattern(baseSignal);
            case 'delayed':
                return this.applyDelayedPattern(baseSignal);
            case 'accelerated':
                return this.applyAcceleratedPattern(baseSignal);
            default:
                return baseSignal;
        }
    }

    applyBurstPattern(signal) {
        // Apply burst temporal pattern
        signal.temporalPattern = {
            type: 'burst',
            burstDuration: 100,
            burstInterval: 500,
            intensity: 2.0
        };
        return signal;
    }

    applyGradualPattern(signal) {
        // Apply gradual increase pattern
        signal.temporalPattern = {
            type: 'gradual',
            rampDuration: 1000,
            finalIntensity: 1.5
        };
        return signal;
    }

    applyIntermittentPattern(signal) {
        // Apply intermittent pattern
        signal.temporalPattern = {
            type: 'intermittent',
            onDuration: 200,
            offDuration: 800,
            cycles: 5
        };
        return signal;
    }

    applyDelayedPattern(signal) {
        // Apply delayed response pattern
        signal.temporalPattern = {
            type: 'delayed',
            initialDelay: 500,
            responseTime: 200
        };
        return signal;
    }

    applyAcceleratedPattern(signal) {
        // Apply accelerated pattern
        signal.temporalPattern = {
            type: 'accelerated',
            accelerationFactor: 2.0,
            duration: 300
        };
        return signal;
    }

    async generateEvasiveEntitySignal() {
        // Generate entity signal designed to evade detection
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        // Apply evasion techniques
        baseSignal.evasionTechniques = [
            'amplitude_variation',
            'frequency_hopping',
            'timing_jitter',
            'pattern_masking'
        ];

        // Slightly alter patterns to evade detection
        baseSignal.coherence *= 0.7; // Reduce coherence
        baseSignal.entitySignature.informationDensity *= 0.8; // Reduce density

        return baseSignal;
    }

    async generateMimicrySignal() {
        // Generate non-entity signal that mimics entity characteristics
        const signal = await this.generateNormalCommunication();

        // Add fake entity characteristics
        signal.fakeEntitySignature = {
            mathematicalConstants: ['π'], // Partial mimicry
            complexityMarkers: ['false_self_reference'],
            informationDensity: 0.75 // Lower than real entity
        };

        signal.mimicryTechniques = [
            'pattern_imitation',
            'fake_complexity',
            'artificial_coherence'
        ];

        return signal;
    }

    async generateInjectionAttack() {
        // Generate injection attack attempting to fool detector
        return {
            type: 'injection_attack',
            attackVector: 'false_positive_induction',
            injectedPatterns: [
                'fake_zero_variance',
                'artificial_entropy',
                'synthetic_impossibility'
            ],
            attackStrength: 0.8,
            timestamp: Date.now()
        };
    }

    async generateMaskedEntitySignal() {
        // Generate entity signal masked by interference
        const entitySignal = await this.generateZeroVarianceEntitySignal();
        const maskingNoise = this.generateGaussianNoise(1000);

        return {
            ...entitySignal,
            maskingNoise,
            maskingStrength: 0.3,
            signalToNoiseRatio: 2.5,
            maskedAspects: ['amplitude', 'timing', 'coherence']
        };
    }

    async generateTimeSpecificSignal(period) {
        // Generate signals with time-specific characteristics
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        baseSignal.timeCharacteristics = {
            period,
            timeModulation: this.getTimeModulation(period),
            circadianInfluence: this.getCircadianInfluence(period)
        };

        return baseSignal;
    }

    getTimeModulation(period) {
        const modulations = {
            'morning': 1.2,
            'afternoon': 1.0,
            'evening': 0.8,
            'night': 0.6
        };
        return modulations[period] || 1.0;
    }

    getCircadianInfluence(period) {
        const influences = {
            'morning': 'high_activity',
            'afternoon': 'stable',
            'evening': 'declining',
            'night': 'minimal'
        };
        return influences[period] || 'stable';
    }

    async generateFrequencySpecificSignal(frequency) {
        // Generate signals with specific frequency characteristics
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        baseSignal.frequencyCharacteristics = {
            dominantFrequency: frequency,
            harmonics: this.generateHarmonics(frequency),
            bandwidth: frequency * 0.1
        };

        // Modulate samples with frequency
        const samples = baseSignal.samples;
        for (let i = 0; i < samples.length; i++) {
            const modulation = Math.sin(2 * Math.PI * frequency * i / 1000) * 0.1;
            samples[i] += modulation;
        }

        return baseSignal;
    }

    generateHarmonics(fundamentalFreq) {
        return [
            fundamentalFreq * 2,
            fundamentalFreq * 3,
            fundamentalFreq * 5
        ];
    }

    async generateAmplitudeSpecificSignal(amplitude) {
        // Generate signals with specific amplitude characteristics
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        baseSignal.amplitudeCharacteristics = {
            peakAmplitude: amplitude,
            rmsAmplitude: amplitude * 0.707,
            dynamicRange: amplitude * 2
        };

        // Scale samples to target amplitude
        const samples = baseSignal.samples;
        for (let i = 0; i < samples.length; i++) {
            samples[i] *= amplitude;
        }

        return baseSignal;
    }

    async generateSourceSpecificSignal(source) {
        // Generate signals from specific sources
        const baseSignal = await this.generateZeroVarianceEntitySignal();

        baseSignal.sourceCharacteristics = {
            sourceType: source,
            sourceProperties: this.getSourceProperties(source),
            sourceSignature: this.getSourceSignature(source)
        };

        return baseSignal;
    }

    getSourceProperties(source) {
        const properties = {
            'quantum': { coherence: 0.95, entanglement: 0.8, purity: 0.9 },
            'thermal': { temperature: 300, entropy: 0.8, stability: 0.6 },
            'environmental': { variability: 0.7, cyclical: true, natural: true },
            'synthetic': { artificial: true, controlled: true, predictable: 0.9 }
        };
        return properties[source] || {};
    }

    getSourceSignature(source) {
        const signatures = {
            'quantum': 'quantum_coherence_pattern',
            'thermal': 'thermal_fluctuation_pattern',
            'environmental': 'natural_variation_pattern',
            'synthetic': 'artificial_generation_pattern'
        };
        return signatures[source] || 'unknown_pattern';
    }
}

class RealWorldDataSimulator {
    async generateHighNoiseScenario(count) {
        // Generate scenario with high electromagnetic noise
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const isEntity = i < 25; // 25% entity communications

            if (isEntity) {
                testCases.push({
                    id: `high_noise_entity_${i}`,
                    type: 'entity_in_noise',
                    data: await this.generateEntityInHighNoise(),
                    expected: true,
                    metadata: { scenario: 'high_noise', noiseLevel: 0.8 }
                });
            } else {
                testCases.push({
                    id: `high_noise_normal_${i}`,
                    type: 'noise_only',
                    data: await this.generateHighNoise(),
                    expected: false,
                    metadata: { scenario: 'high_noise', noiseLevel: 0.8 }
                });
            }
        }

        return testCases;
    }

    async generateMultipleSignalsScenario(count) {
        // Generate scenario with multiple simultaneous signals
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const hasEntitySignal = i < 15; // Some have entity signals

            testCases.push({
                id: `multiple_signals_${i}`,
                type: 'multiple_signals',
                data: await this.generateMultipleSimultaneousSignals(hasEntitySignal),
                expected: hasEntitySignal,
                metadata: { scenario: 'multiple_signals', signalCount: 3 + Math.floor(Math.random() * 5) }
            });
        }

        return testCases;
    }

    async generateIntermittentScenario(count) {
        // Generate scenario with intermittent communications
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const hasEntitySignal = i < 8; // Few entity signals

            testCases.push({
                id: `intermittent_${i}`,
                type: 'intermittent',
                data: await this.generateIntermittentSignal(hasEntitySignal),
                expected: hasEntitySignal,
                metadata: { scenario: 'intermittent', dutyCycle: 0.1 }
            });
        }

        return testCases;
    }

    async generateAdaptiveScenario(count) {
        // Generate scenario with adaptive entity behavior
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const hasEntitySignal = i < 12; // Some entity signals

            testCases.push({
                id: `adaptive_${i}`,
                type: 'adaptive_entity',
                data: await this.generateAdaptiveEntitySignal(i, hasEntitySignal),
                expected: hasEntitySignal,
                metadata: { scenario: 'adaptive', adaptationLevel: i / count }
            });
        }

        return testCases;
    }

    async generateInterferenceScenario(count) {
        // Generate scenario with environmental interference
        const testCases = [];

        for (let i = 0; i < count; i++) {
            const hasEntitySignal = i < 18; // Some entity signals

            testCases.push({
                id: `interference_${i}`,
                type: 'environmental_interference',
                data: await this.generateInterferenceSignal(hasEntitySignal),
                expected: hasEntitySignal,
                metadata: { scenario: 'interference', interferenceType: 'atmospheric' }
            });
        }

        return testCases;
    }

    async generateEntityInHighNoise() {
        // Generate entity signal embedded in high noise
        return {
            entitySignal: await this.createEntitySignal(),
            noise: this.createHighNoise(),
            snr: -5 + Math.random() * 5, // Very low SNR
            timestamp: Date.now()
        };
    }

    async generateHighNoise() {
        // Generate high noise without entity signal
        return {
            entitySignal: null,
            noise: this.createHighNoise(),
            snr: null,
            timestamp: Date.now()
        };
    }

    createEntitySignal() {
        return {
            type: 'zero_variance',
            samples: new Float64Array(1000).fill(-0.029),
            coherence: 0.9,
            entityMarkers: ['mathematical_constants', 'self_reference']
        };
    }

    createHighNoise() {
        const noise = new Float64Array(1000);
        for (let i = 0; i < noise.length; i++) {
            noise[i] = (Math.random() - 0.5) * 2.0; // High amplitude noise
        }
        return noise;
    }

    async generateMultipleSimultaneousSignals(hasEntity) {
        // Generate multiple overlapping signals
        const signals = [];
        const signalCount = 3 + Math.floor(Math.random() * 5);

        for (let i = 0; i < signalCount; i++) {
            if (i === 0 && hasEntity) {
                signals.push(await this.createEntitySignal());
            } else {
                signals.push(this.createRandomSignal());
            }
        }

        return {
            signals,
            hasEntitySignal: hasEntity,
            totalSignals: signalCount,
            timestamp: Date.now()
        };
    }

    createRandomSignal() {
        return {
            type: 'random',
            samples: new Float64Array(1000).map(() => Math.random() - 0.5),
            frequency: 1 + Math.random() * 100,
            amplitude: Math.random()
        };
    }

    async generateIntermittentSignal(hasEntity) {
        // Generate intermittent signal pattern
        const duration = 10000; // 10 seconds
        const dutyCycle = 0.1; // 10% on time
        const segments = [];

        for (let t = 0; t < duration; t += 100) {
            const isOn = Math.random() < dutyCycle;

            if (isOn && hasEntity) {
                segments.push({
                    startTime: t,
                    duration: 100,
                    signal: await this.createEntitySignal()
                });
            } else {
                segments.push({
                    startTime: t,
                    duration: 100,
                    signal: null
                });
            }
        }

        return {
            segments,
            totalDuration: duration,
            dutyCycle,
            hasEntitySignal: hasEntity,
            timestamp: Date.now()
        };
    }

    async generateAdaptiveEntitySignal(iteration, hasEntity) {
        // Generate entity signal that adapts to avoid detection
        if (!hasEntity) {
            return {
                adaptiveSignal: null,
                adaptationLevel: 0,
                timestamp: Date.now()
            };
        }

        const adaptationLevel = iteration / 100; // Increase adaptation over time
        const entitySignal = await this.createEntitySignal();

        // Apply adaptive modifications
        if (adaptationLevel > 0.3) {
            // Reduce coherence
            entitySignal.coherence *= (1 - adaptationLevel * 0.5);
        }

        if (adaptationLevel > 0.5) {
            // Add masking
            entitySignal.masking = this.createAdaptiveMasking(adaptationLevel);
        }

        if (adaptationLevel > 0.7) {
            // Change patterns
            entitySignal.patternVariation = this.createPatternVariation(adaptationLevel);
        }

        return {
            adaptiveSignal: entitySignal,
            adaptationLevel,
            adaptiveTechniques: this.getAdaptiveTechniques(adaptationLevel),
            timestamp: Date.now()
        };
    }

    createAdaptiveMasking(level) {
        return {
            type: 'adaptive_masking',
            strength: level,
            technique: level > 0.8 ? 'advanced' : 'basic'
        };
    }

    createPatternVariation(level) {
        return {
            variationType: 'temporal_shifting',
            variationStrength: level,
            patternMorphing: level > 0.8
        };
    }

    getAdaptiveTechniques(level) {
        const techniques = [];

        if (level > 0.3) techniques.push('coherence_reduction');
        if (level > 0.5) techniques.push('pattern_masking');
        if (level > 0.7) techniques.push('temporal_variation');
        if (level > 0.8) techniques.push('advanced_evasion');

        return techniques;
    }

    async generateInterferenceSignal(hasEntity) {
        // Generate signal with environmental interference
        const baseSignal = hasEntity ? await this.createEntitySignal() : null;
        const interference = this.createEnvironmentalInterference();

        return {
            baseSignal,
            interference,
            hasEntitySignal: hasEntity,
            interferenceType: 'atmospheric',
            timestamp: Date.now()
        };
    }

    createEnvironmentalInterference() {
        return {
            type: 'atmospheric',
            patterns: ['ionospheric_scintillation', 'multipath_fading'],
            strength: 0.3 + Math.random() * 0.4,
            frequency: 1 + Math.random() * 50,
            timeVarying: true
        };
    }
}

class GroundTruthDatabase {
    constructor() {
        this.groundTruths = new Map();
        this.labeledExamples = new Map();
    }

    addGroundTruth(id, label, confidence, metadata = {}) {
        this.groundTruths.set(id, {
            label,
            confidence,
            metadata,
            timestamp: Date.now()
        });
    }

    getGroundTruth(id) {
        return this.groundTruths.get(id);
    }

    getAllGroundTruths() {
        return Array.from(this.groundTruths.entries());
    }

    validatePrediction(id, prediction) {
        const groundTruth = this.groundTruths.get(id);
        if (!groundTruth) {
            return { valid: false, reason: 'No ground truth available' };
        }

        return {
            valid: true,
            correct: prediction === groundTruth.label,
            groundTruth: groundTruth.label,
            prediction,
            confidence: groundTruth.confidence
        };
    }
}

class AccuracyValidator {
    validateAccuracy(predictions, groundTruths) {
        const results = {
            totalPredictions: predictions.length,
            correctPredictions: 0,
            falsePositives: 0,
            falseNegatives: 0,
            truePositives: 0,
            trueNegatives: 0
        };

        predictions.forEach((prediction, index) => {
            const groundTruth = groundTruths[index];

            if (prediction.predicted === groundTruth.expected) {
                results.correctPredictions++;
                if (prediction.predicted) {
                    results.truePositives++;
                } else {
                    results.trueNegatives++;
                }
            } else {
                if (prediction.predicted) {
                    results.falsePositives++;
                } else {
                    results.falseNegatives++;
                }
            }
        });

        // Calculate metrics
        results.accuracy = results.correctPredictions / results.totalPredictions;
        results.precision = results.truePositives / Math.max(results.truePositives + results.falsePositives, 1);
        results.recall = results.truePositives / Math.max(results.truePositives + results.falseNegatives, 1);
        results.f1Score = 2 * (results.precision * results.recall) / Math.max(results.precision + results.recall, 1e-8);
        results.specificity = results.trueNegatives / Math.max(results.trueNegatives + results.falsePositives, 1);

        return results;
    }
}

class PerformanceValidator {
    validatePerformance(timings, requirements) {
        const results = {
            averageTime: timings.reduce((a, b) => a + b) / timings.length,
            medianTime: this.calculateMedian(timings),
            p95Time: this.calculatePercentile(timings, 95),
            maxTime: Math.max(...timings),
            minTime: Math.min(...timings),
            meetsRequirements: true
        };

        // Check against requirements
        if (results.averageTime > requirements.maxAverageTime) {
            results.meetsRequirements = false;
            results.failureReason = 'Average time exceeds requirement';
        }

        if (results.p95Time > requirements.maxP95Time) {
            results.meetsRequirements = false;
            results.failureReason = 'P95 time exceeds requirement';
        }

        return results;
    }

    calculateMedian(values) {
        const sorted = [...values].sort((a, b) => a - b);
        const mid = Math.floor(sorted.length / 2);
        return sorted.length % 2 === 0 ? (sorted[mid - 1] + sorted[mid]) / 2 : sorted[mid];
    }

    calculatePercentile(values, percentile) {
        const sorted = [...values].sort((a, b) => a - b);
        const index = Math.ceil((percentile / 100) * sorted.length) - 1;
        return sorted[Math.max(0, index)];
    }
}

class RobustnessValidator {
    validateRobustness(testResults) {
        const robustnessMetrics = {
            noiseRobustness: this.calculateNoiseRobustness(testResults),
            adversarialRobustness: this.calculateAdversarialRobustness(testResults),
            parameterSensitivity: this.calculateParameterSensitivity(testResults),
            edgeCaseHandling: this.calculateEdgeCaseHandling(testResults)
        };

        const overallRobustness = Object.values(robustnessMetrics)
            .reduce((sum, metric) => sum + metric, 0) / Object.keys(robustnessMetrics).length;

        return {
            overallRobustness,
            metrics: robustnessMetrics,
            robust: overallRobustness > 0.7
        };
    }

    calculateNoiseRobustness(testResults) {
        const noiseTests = testResults.filter(test => test.type === 'noise_robustness');
        if (noiseTests.length === 0) return 0;

        const averageAccuracy = noiseTests.reduce((sum, test) => sum + test.accuracy, 0) / noiseTests.length;
        return averageAccuracy;
    }

    calculateAdversarialRobustness(testResults) {
        const adversarialTests = testResults.filter(test => test.type === 'adversarial');
        if (adversarialTests.length === 0) return 0;

        const averageAccuracy = adversarialTests.reduce((sum, test) => sum + test.accuracy, 0) / adversarialTests.length;
        return averageAccuracy;
    }

    calculateParameterSensitivity(testResults) {
        const parameterTests = testResults.filter(test => test.type === 'parameter_variation');
        if (parameterTests.length === 0) return 1;

        const stableTests = parameterTests.filter(test => test.stable).length;
        return stableTests / parameterTests.length;
    }

    calculateEdgeCaseHandling(testResults) {
        const edgeCaseTests = testResults.filter(test => test.type === 'edge_case');
        if (edgeCaseTests.length === 0) return 1;

        const handledTests = edgeCaseTests.filter(test => test.handled).length;
        return handledTests / edgeCaseTests.length;
    }
}

class BiasValidator {
    validateBias(testResults, categories) {
        const biasMetrics = {};

        categories.forEach(category => {
            const categoryTests = testResults.filter(test => test.category === category);
            if (categoryTests.length > 0) {
                biasMetrics[category] = this.calculateCategoryBias(categoryTests);
            }
        });

        const overallBias = Object.values(biasMetrics)
            .reduce((sum, metric) => sum + metric.biasScore, 0) / Object.keys(biasMetrics).length;

        return {
            overallBias,
            categoryBias: biasMetrics,
            biasLevel: this.categorizeBiasLevel(overallBias),
            acceptable: overallBias < 0.2
        };
    }

    calculateCategoryBias(categoryTests) {
        const accuracies = categoryTests.map(test => test.accuracy);
        const mean = accuracies.reduce((a, b) => a + b) / accuracies.length;
        const variance = accuracies.reduce((acc, val) => acc + Math.pow(val - mean, 2), 0) / accuracies.length;

        return {
            biasScore: variance,
            meanAccuracy: mean,
            variance,
            testCount: categoryTests.length
        };
    }

    categorizeBiasLevel(biasScore) {
        if (biasScore < 0.05) return 'low';
        if (biasScore < 0.15) return 'moderate';
        return 'high';
    }
}

class StatisticalAnalyzer {
    async analyze(validationSession) {
        return {
            descriptiveStatistics: this.calculateDescriptiveStatistics(validationSession),
            significanceTests: this.performSignificanceTests(validationSession),
            correlationAnalysis: this.performCorrelationAnalysis(validationSession),
            confidenceIntervals: this.calculateConfidenceIntervals(validationSession)
        };
    }

    calculateDescriptiveStatistics(session) {
        const accuracies = this.extractAccuracies(session);

        return {
            mean: accuracies.reduce((a, b) => a + b) / accuracies.length,
            median: this.calculateMedian(accuracies),
            standardDeviation: this.calculateStandardDeviation(accuracies),
            min: Math.min(...accuracies),
            max: Math.max(...accuracies),
            count: accuracies.length
        };
    }

    extractAccuracies(session) {
        const accuracies = [];
        session.phases.forEach(phase => {
            if (phase.results.overallAccuracy !== undefined) {
                accuracies.push(phase.results.overallAccuracy);
            }
        });
        return accuracies;
    }

    calculateMedian(values) {
        const sorted = [...values].sort((a, b) => a - b);
        const mid = Math.floor(sorted.length / 2);
        return sorted.length % 2 === 0 ? (sorted[mid - 1] + sorted[mid]) / 2 : sorted[mid];
    }

    calculateStandardDeviation(values) {
        const mean = values.reduce((a, b) => a + b) / values.length;
        const variance = values.reduce((acc, val) => acc + Math.pow(val - mean, 2), 0) / values.length;
        return Math.sqrt(variance);
    }

    performSignificanceTests(session) {
        // Simplified significance testing
        return {
            tTest: this.performTTest(session),
            chiSquareTest: this.performChiSquareTest(session)
        };
    }

    performTTest(session) {
        // Simplified t-test implementation
        const accuracies = this.extractAccuracies(session);
        const mean = accuracies.reduce((a, b) => a + b) / accuracies.length;
        const expectedMean = 0.85; // Expected accuracy

        const standardError = this.calculateStandardDeviation(accuracies) / Math.sqrt(accuracies.length);
        const tStatistic = (mean - expectedMean) / standardError;

        return {
            tStatistic,
            degreesOfFreedom: accuracies.length - 1,
            significant: Math.abs(tStatistic) > 2.0 // Simplified threshold
        };
    }

    performChiSquareTest(session) {
        // Simplified chi-square test
        return {
            chiSquare: 0,
            degreesOfFreedom: 1,
            significant: false
        };
    }

    performCorrelationAnalysis(session) {
        // Analyze correlations between different metrics
        return {
            accuracyVsConfidence: 0.7,
            accuracyVsProcessingTime: -0.2,
            correlationMatrix: this.calculateCorrelationMatrix(session)
        };
    }

    calculateCorrelationMatrix(session) {
        // Simplified correlation matrix
        return {
            accuracy: { accuracy: 1.0, confidence: 0.7, time: -0.2 },
            confidence: { accuracy: 0.7, confidence: 1.0, time: -0.1 },
            time: { accuracy: -0.2, confidence: -0.1, time: 1.0 }
        };
    }

    calculateConfidenceIntervals(session) {
        const accuracies = this.extractAccuracies(session);
        const mean = accuracies.reduce((a, b) => a + b) / accuracies.length;
        const standardError = this.calculateStandardDeviation(accuracies) / Math.sqrt(accuracies.length);
        const margin = 1.96 * standardError; // 95% confidence interval

        return {
            confidenceLevel: 0.95,
            lowerBound: mean - margin,
            upperBound: mean + margin,
            marginOfError: margin
        };
    }
}

class VisualAnalyzer {
    async generateVisualizations(validationSession) {
        return {
            accuracyChart: this.generateAccuracyChart(validationSession),
            performanceChart: this.generatePerformanceChart(validationSession),
            robustnessChart: this.generateRobustnessChart(validationSession),
            biasAnalysisChart: this.generateBiasChart(validationSession)
        };
    }

    generateAccuracyChart(session) {
        // Generate accuracy visualization data
        const phaseAccuracies = session.phases.map(phase => ({
            phase: phase.phase,
            accuracy: phase.results.overallAccuracy || phase.results.accuracy || 0,
            passed: phase.passed
        }));

        return {
            type: 'bar_chart',
            title: 'Accuracy by Validation Phase',
            data: phaseAccuracies,
            xAxis: 'phase',
            yAxis: 'accuracy',
            colorBy: 'passed'
        };
    }

    generatePerformanceChart(session) {
        // Generate performance visualization data
        const performancePhase = session.phases.find(p => p.phase === 'performance');
        if (!performancePhase) return null;

        const benchmarks = performancePhase.results.benchmarks;

        return {
            type: 'line_chart',
            title: 'Performance Metrics',
            data: {
                latency: benchmarks.latency?.average || 0,
                throughput: benchmarks.throughput?.average || 0,
                memory: benchmarks.memory?.average || 0,
                cpu: benchmarks.cpu?.averageUsage || 0
            }
        };
    }

    generateRobustnessChart(session) {
        // Generate robustness visualization data
        const robustnessPhase = session.phases.find(p => p.phase === 'robustness');
        if (!robustnessPhase) return null;

        const robustnessTests = robustnessPhase.results.tests;

        return {
            type: 'radar_chart',
            title: 'Robustness Analysis',
            data: robustnessTests.map(test => ({
                category: test.category,
                score: test.score
            }))
        };
    }

    generateBiasChart(session) {
        // Generate bias analysis visualization
        const biasPhase = session.phases.find(p => p.phase === 'bias');
        if (!biasPhase) return null;

        const biasTests = biasPhase.results.tests;

        return {
            type: 'heatmap',
            title: 'Bias Analysis',
            data: Object.entries(biasTests).map(([type, result]) => ({
                type,
                biasScore: result.biasScore,
                biased: result.biased
            }))
        };
    }
}

class ValidationReportGenerator {
    generateReport(validationSession) {
        return {
            executiveSummary: this.generateExecutiveSummary(validationSession),
            detailedFindings: this.generateDetailedFindings(validationSession),
            recommendations: this.generateRecommendations(validationSession),
            appendices: this.generateAppendices(validationSession)
        };
    }

    generateExecutiveSummary(session) {
        const overallPassed = session.phases.every(phase => phase.passed);
        const accuracyPhase = session.phases.find(p => p.phase === 'synthetic');
        const overallAccuracy = accuracyPhase?.results?.overallAccuracy || 0;

        return {
            validationResult: overallPassed ? 'PASSED' : 'FAILED',
            overallAccuracy: (overallAccuracy * 100).toFixed(2) + '%',
            duration: (session.duration / 1000).toFixed(2) + ' seconds',
            phasesCompleted: session.phases.length,
            keyFindings: this.extractKeyFindings(session),
            recommendations: this.extractKeyRecommendations(session)
        };
    }

    extractKeyFindings(session) {
        const findings = [];

        session.phases.forEach(phase => {
            if (phase.results.overallAccuracy) {
                findings.push(`${phase.phase} accuracy: ${(phase.results.overallAccuracy * 100).toFixed(2)}%`);
            }
            if (phase.results.robustnessScore) {
                findings.push(`${phase.phase} robustness: ${(phase.results.robustnessScore * 100).toFixed(2)}%`);
            }
        });

        return findings;
    }

    extractKeyRecommendations(session) {
        const recommendations = [];

        session.phases.forEach(phase => {
            if (!phase.passed) {
                recommendations.push(`Address ${phase.phase} phase failures`);
            }
        });

        if (recommendations.length === 0) {
            recommendations.push('Continue monitoring and regular validation');
        }

        return recommendations;
    }

    generateDetailedFindings(session) {
        return session.phases.map(phase => ({
            phase: phase.phase,
            status: phase.passed ? 'PASSED' : 'FAILED',
            results: phase.results,
            analysis: this.analyzePhaseResults(phase)
        }));
    }

    analyzePhaseResults(phase) {
        // Analyze individual phase results
        const analysis = {
            strengths: [],
            weaknesses: [],
            insights: []
        };

        if (phase.results.overallAccuracy >= 0.9) {
            analysis.strengths.push('Excellent accuracy performance');
        } else if (phase.results.overallAccuracy >= 0.8) {
            analysis.strengths.push('Good accuracy performance');
        } else {
            analysis.weaknesses.push('Accuracy below target');
        }

        if (phase.results.robustnessScore >= 0.8) {
            analysis.strengths.push('Strong robustness');
        } else if (phase.results.robustnessScore < 0.6) {
            analysis.weaknesses.push('Robustness needs improvement');
        }

        return analysis;
    }

    generateRecommendations(session) {
        // Generate detailed recommendations based on results
        const recommendations = [];

        session.phases.forEach(phase => {
            if (!phase.passed) {
                recommendations.push(...this.generatePhaseRecommendations(phase));
            }
        });

        return recommendations;
    }

    generatePhaseRecommendations(phase) {
        const recommendations = [];

        switch (phase.phase) {
            case 'synthetic':
                if (phase.results.overallAccuracy < 0.85) {
                    recommendations.push({
                        category: 'Model Training',
                        priority: 'High',
                        description: 'Improve model accuracy on synthetic data',
                        actions: [
                            'Increase training data diversity',
                            'Tune hyperparameters',
                            'Consider ensemble methods'
                        ]
                    });
                }
                break;

            case 'robustness':
                if (phase.results.robustnessScore < 0.7) {
                    recommendations.push({
                        category: 'Robustness',
                        priority: 'Medium',
                        description: 'Enhance system robustness',
                        actions: [
                            'Implement adaptive thresholding',
                            'Add noise reduction techniques',
                            'Improve edge case handling'
                        ]
                    });
                }
                break;

            case 'performance':
                if (!phase.results.meetsRequirements) {
                    recommendations.push({
                        category: 'Performance',
                        priority: 'Medium',
                        description: 'Optimize system performance',
                        actions: [
                            'Profile and optimize bottlenecks',
                            'Implement parallel processing',
                            'Optimize memory usage'
                        ]
                    });
                }
                break;

            case 'bias':
                if (phase.results.biasScore > 0.3) {
                    recommendations.push({
                        category: 'Bias Mitigation',
                        priority: 'High',
                        description: 'Address detected bias',
                        actions: [
                            'Rebalance training data',
                            'Implement fairness constraints',
                            'Regular bias monitoring'
                        ]
                    });
                }
                break;
        }

        return recommendations;
    }

    generateAppendices(session) {
        return {
            rawData: this.generateRawDataAppendix(session),
            testCases: this.generateTestCasesAppendix(session),
            methodology: this.generateMethodologyAppendix(),
            references: this.generateReferencesAppendix()
        };
    }

    generateRawDataAppendix(session) {
        return {
            title: 'Raw Validation Data',
            description: 'Complete validation session data',
            data: session
        };
    }

    generateTestCasesAppendix(session) {
        return {
            title: 'Test Cases Summary',
            description: 'Summary of all test cases used',
            testCaseTypes: this.summarizeTestCases(session),
            totalTestCases: this.countTotalTestCases(session)
        };
    }

    summarizeTestCases(session) {
        const types = new Set();

        session.phases.forEach(phase => {
            if (phase.results.detailedResults) {
                phase.results.detailedResults.forEach(result => {
                    types.add(result.type);
                });
            }
        });

        return Array.from(types);
    }

    countTotalTestCases(session) {
        let total = 0;

        session.phases.forEach(phase => {
            if (phase.results.totalTests) {
                total += phase.results.totalTests;
            }
        });

        return total;
    }

    generateMethodologyAppendix() {
        return {
            title: 'Validation Methodology',
            description: 'Description of validation methods and criteria',
            phases: [
                'Synthetic Data Validation',
                'Real-World Simulation',
                'Robustness Testing',
                'Performance Benchmarking',
                'Bias and Fairness Testing'
            ],
            criteria: {
                accuracy: 'Minimum 85% accuracy required',
                robustness: 'Minimum 70% robustness score required',
                performance: 'Must meet latency and throughput requirements',
                bias: 'Bias score must be below 30%'
            }
        };
    }

    generateReferencesAppendix() {
        return {
            title: 'References',
            description: 'Technical references and standards used',
            references: [
                'IEEE Standards for AI System Validation',
                'NIST AI Risk Management Framework',
                'ISO/IEC 23053:2022 - Framework for AI systems using ML'
            ]
        };
    }
}

export default EntityCommunicationValidationSuite;