// SSL/TLS Implementation Example
class TLSConnection {
    constructor() {
        this.cipherSuites = new Map([
            ['TLS_AES_256_GCM_SHA384', {
                cipher: 'AES-256-GCM',
                hash: 'SHA-384',
                keyExchange: 'ECDHE'
            }],
            ['TLS_CHACHA20_POLY1305_SHA256', {
                cipher: 'CHACHA20-POLY1305',
                hash: 'SHA-256',
                keyExchange: 'ECDHE'
            }]
        ]);
        
        this.sessionCache = new Map();
        this.certificates = new CertificateStore();
    }

    async performHandshake() {
        try {
            // Generate cryptographic parameters
            const clientRandom = crypto.randomBytes(32);
            const serverRandom = await this.getServerRandom();
            
            // Perform key exchange
            const { publicKey, privateKey } = await this.generateKeyPair();
            const sharedSecret = await this.computeSharedSecret(
                publicKey,
                privateKey
            );
            
            // Derive session keys
            const sessionKeys = await this.deriveSessionKeys(
                sharedSecret,
                clientRandom,
                serverRandom
            );
            
            return {
                masterSecret: sessionKeys.masterSecret,
                encryptionKey: sessionKeys.encryptionKey,
                macKey: sessionKeys.macKey
            };
        } catch (error) {
            throw new TLSHandshakeError(
                `Handshake failed: ${error.message}`
            );
        }
    }

    async validateCertificate(cert) {
        const validator = new CertificateValidator({
            trustAnchors: this.certificates.getTrustAnchors(),
            crlCheckEnabled: true,
            ocspCheckEnabled: true
        });

        return await validator.validate(cert);
    }
}

class CertificateManager {
    constructor() {
        this.store = new CertificateStore();
        this.validator = new CertificateValidator();
        this.ocspChecker = new OCSPChecker();
    }

    async generateCSR(domain, options) {
        const keyPair = await this.generateKeyPair();
        
        const csr = new CertificateSigningRequest({
            commonName: domain,
            organization: options.organization,
            countryCode: options.country,
            publicKey: keyPair.publicKey,
            signatureAlgorithm: 'sha256WithRSAEncryption'
        });

        return {
            csr: csr.toPEM(),
            privateKey: keyPair.privateKey.toPEM()
        };
    }

    async validateCertificateChain(chain) {
        const validationContext = {
            trustAnchors: await this.store.getTrustAnchors(),
            time: new Date(),
            policies: this.getValidationPolicies()
        };

        for (const cert of chain) {
            // Validate basic constraints
            if (!this.validateBasicConstraints(cert)) {
                throw new ValidationError('Invalid basic constraints');
            }

            // Check certificate status
            const status = await this.ocspChecker.checkStatus(cert);
            if (status !== 'valid') {
                throw new ValidationError(`Invalid certificate status: ${status}`);
            }

            // Validate key usage
            if (!this.validateKeyUsage(cert)) {
                throw new ValidationError('Invalid key usage');
            }
        }

        return true;
    }
}

class SecurityMonitor {
    constructor() {
        this.alertSystem = new AlertSystem();
        this.mitigationSystem = new MitigationSystem();
        this.analyzer = new ThreatAnalyzer();
    }

    async monitorConnection(connection) {
        // Monitor for suspicious patterns
        const patterns = await this.analyzer.detectPatterns(connection);
        
        for (const pattern of patterns) {
            if (this.isSuspicious(pattern)) {
                await this.handleSuspiciousActivity(pattern);
            }
        }
    }

    async handleSuspiciousActivity(activity) {
        // Log the incident
        await this.alertSystem.logIncident({
            type: activity.type,
            severity: this.calculateSeverity(activity),
            timestamp: new Date(),
            details: activity.details
        });

        // Apply mitigation measures
        const mitigation = this.mitigationSystem
            .getMitigation(activity.type);
        
        await mitigation.apply();
    }

    calculateSeverity(activity) {
        const factors = {
            frequency: this.getActivityFrequency(activity),
            impact: this.assessPotentialImpact(activity),
            confidence: this.determineDetectionConfidence(activity)
        };

        return this.severityCalculator.calculate(factors);
    }
}

class AdvancedSecuritySystem {
    constructor(config) {
        this.securityLayers = new Map();
        this.stateManager = new SecurityStateManager({
            maxStates: 1000,
            stateTimeout: 3600,
            cleanupInterval: 300
        });
        
        this.initializeLayers();
    }

    async initializeLayers() {
        // Record Protocol Layer
        this.securityLayers.set('record', new RecordProtocolLayer({
            fragmentationStrategy: new AdaptiveFragmentation(),
            compressionMethod: 'DEFLATE',
            encryptionSuite: await this.selectOptimalCipherSuite()
        }));

        // Handshake Protocol Layer
        this.securityLayers.set('handshake', new HandshakeProtocolLayer({
            keyExchangeMethods: ['ECDHE', 'DHE'],
            signatureAlgorithms: ['ECDSA', 'RSA-PSS'],
            certificateVerification: new ExtendedCertVerifier()
        }));

        // Application Data Layer
        this.securityLayers.set('application', new ApplicationDataLayer({
            bufferSize: 16384,
            flowControl: new AdaptiveFlowController(),
            errorRecovery: new GracefulRecoveryHandler()
        }));
    }

    async selectOptimalCipherSuite() {
        const systemCapabilities = await this.analyzeSystemCapabilities();
        const securityRequirements = this.getSecurityRequirements();
        
        return this.cipherSuiteOptimizer.selectOptimal({
            capabilities: systemCapabilities,
            requirements: securityRequirements,
            preferences: this.getOrganizationalPreferences()
        });
    }
}

class AutomationSystem {
    constructor() {
        this.certificateManager = new CertificateLifecycleManager();
        this.deploymentManager = new ZeroDowntimeDeployer();
        this.monitoringSystem = new SecurityMonitor();
        
        this.initializeAutomation();
    }

    async initializeAutomation() {
        // Configure certificate lifecycle automation
        await this.setupCertificateAutomation();
        
        // Configure key rotation automation
        await this.setupKeyRotationAutomation();
        
        // Configure monitoring and alerting
        await this.setupMonitoringAutomation();
    }

    async setupCertificateAutomation() {
        const certAutomation = new ACMEAutomation({
            provider: 'LetsEncrypt',
            renewalThreshold: 30, // days
            renewalBatchSize: 10,
            validationMethods: ['dns-01', 'http-01']
        });

        certAutomation.on('pre-renewal', async (cert) => {
            await this.backupCertificate(cert);
            await this.validateRenewalEligibility(cert);
        });

        certAutomation.on('post-renewal', async (cert) => {
            await this.validateNewCertificate(cert);
            await this.deployNewCertificate(cert);
            await this.verifyDeployment(cert);
        });

        return certAutomation;
    }

    async setupKeyRotationAutomation() {
        const keyRotation = new KeyRotationManager({
            rotationInterval: 90, // days
            keyAlgorithm: 'ECDSA',
            keyStrength: 'P-384',
            backupEnabled: true
        });

        keyRotation.on('pre-rotation', async (key) => {
            await this.validateKeyMaterial(key);
            await this.prepareKeyRotation(key);
        });

        keyRotation.on('post-rotation', async (key) => {
            await this.verifyKeyRotation(key);
            await this.updateSecurityPolicies(key);
        });

        return keyRotation;
    }
}

class InfrastructureSecurityManager {
    constructor() {
        this.hsmController = new HSMController({
            redundancy: true,
            backupInterval: 3600,
            keyRotationPolicy: new KeyRotationPolicy({
                interval: '90d',
                algorithm: 'ECDSA',
                keyStrength: 'P-384'
            })
        });

        this.accessControlSystem = new EnterpriseAccessControl({
            rbacModel: new HierarchicalRBAC(),
            mfaProvider: new MultiFactorAuth({
                providers: ['TOTP', 'FIDO2', 'SmartCard'],
                failureThreshold: 3,
                lockoutPeriod: '30m'
            }),
            auditSystem: new SecurityAuditSystem({
                retention: '365d',
                realTimeAlerts: true
            })
        });
    }

    async initializeSecurityInfrastructure() {
        // Initialize HSM connectivity
        await this.hsmController.initialize();
        
        // Setup secure channels
        const secureChannels = await this.establishSecureChannels({
            encryption: 'AES-256-GCM',
            keyExchange: 'ECDHE',
            mac: 'HMAC-SHA384'
        });

        // Configure network security
        await this.configureNetworkSecurity({
            firewallRules: this.generateSecurityRules(),
            idsPolicies: await this.loadIDSPolicies(),
            trafficAnalysis: new MLTrafficAnalyzer({
                modelPath: '/models/traffic/latest',
                updateInterval: '1h'
            })
        });

        return {
            status: 'initialized',
            securityMetrics: await this.measureSecurityBaseline()
        };
    }

    async measureSecurityBaseline() {
        const metrics = new SecurityMetricsCollector();
        
        return {
            keyStrength: await metrics.evaluateKeyStrength(),
            networkSecurity: await metrics.evaluateNetworkSecurity(),
            accessControl: await metrics.evaluateAccessControl(),
            overallScore: await metrics.calculateCompositeScore()
        };
    }
}

class AdvancedCryptographyManager {
    constructor() {
        this.algorithmSuite = new HybridCryptoSuite({
            classical: {
                asymmetric: ['RSA-4096', 'ECDSA-P384'],
                symmetric: ['AES-256-GCM', 'ChaCha20-Poly1305']
            },
            postQuantum: {
                keyEncapsulation: ['Kyber1024', 'NTRU-HRSS'],
                signatures: ['Dilithium3', 'SPHINCS+']
            }
        });

        this.keyManager = new QuantumSafeKeyManager({
            rotationSchedule: new AdaptiveScheduler(),
            backupStrategy: new SecureBackup({
                redundancy: 3,
                geoDistribution: true
            })
        });
    }

    async initializeHybridCrypto() {
        // Initialize quantum-safe parameters
        const quantumParams = await this.generateQuantumSafeParams();
        
        // Setup hybrid key exchange
        const hybridKeyExchange = new HybridKeyExchange({
            classical: await this.algorithmSuite.getClassicalKeyExchange(),
            postQuantum: await this.algorithmSuite.getPostQuantumKeyExchange(),
            combiner: new SecureCombiner({
                method: 'XOR-KDF',
                hashFunction: 'SHA3-384'
            })
        });

        return hybridKeyExchange;
    }

    async performHybridHandshake(connection) {
        const classicalKeys = await this.performClassicalHandshake(connection);
        const quantumKeys = await this.performQuantumHandshake(connection);
        
        return this.combineKeyMaterial({
            classical: classicalKeys,
            quantum: quantumKeys,
            metadata: {
                timestamp: Date.now(),
                sessionId: crypto.randomBytes(32)
            }
        });
    }
}