@clduab11/gemini-flow/src/security/production-security-hardening.ts

Revolutionary AI agent swarm coordination platform with Google Services integration, multimedia processing, and production-ready monitoring. Features 8 Google AI services, quantum computing capabilities, and enterprise-grade security.

/**
 * Production Security Hardening Framework
 *
 * Enterprise-grade security implementation for production Google Services deployment with:
 * 1. Application Security:
 *    - Input validation and sanitization for all endpoints
 *    - SQL injection prevention (parameterized queries)
 *    - XSS protection (CSP headers, output encoding)
 *    - CSRF tokens for state-changing operations
 *    - Rate limiting and DDoS protection
 *
 * 2. Infrastructure Security:
 *    - Network segmentation and firewall rules
 *    - WAF configuration for API protection
 *    - TLS 1.3 enforcement with HSTS
 *    - Certificate pinning for mobile/desktop clients
 *    - Secrets rotation policies (90-day max)
 *
 * 3. Compliance and Auditing:
 *    - SIEM integration (Splunk/ELK)
 *    - Audit log aggregation and retention (7 years)
 *    - PII detection and masking
 *    - GDPR data subject request automation
 *    - SOC2 Type II compliance checklist
 *
 * 4. Incident Response:
 *    - Security runbooks for common scenarios
 *    - Automated threat detection rules
 *    - Incident response team escalation
 *    - Forensics data collection scripts
 */

import { EventEmitter } from "events";
import { Logger } from "../utils/logger.js";
import crypto from "crypto";
import jwt from "jsonwebtoken";
import bcrypt from "bcrypt";
import rateLimit from "express-rate-limit";
import helmet from "helmet";
import compression from "compression";
import validator from "validator";
import DOMPurify from "isomorphic-dompurify";
import { DatabaseConnection } from "../core/sqlite-connection-pool.js";

// Security Configuration Interfaces
export interface ProductionSecurityConfig {
  version: string;
  environment: "development" | "staging" | "production";
  enforcementLevel: "audit" | "warn" | "block" | "strict";

  // Application Security
  applicationSecurity: {
    inputValidation: {
      enabled: boolean;
      strictMode: boolean;
      allowedTags: string[];
      maxInputLength: number;
      sqlInjectionPrevention: boolean;
    };
    xssProtection: {
      enabled: boolean;
      contentSecurityPolicy: string;
      xssFilter: boolean;
      frameOptions: string;
    };
    csrfProtection: {
      enabled: boolean;
      tokenExpiry: number;
      cookieSettings: {
        httpOnly: boolean;
        secure: boolean;
        sameSite: "strict" | "lax" | "none";
      };
    };
    rateLimiting: {
      enabled: boolean;
      windowMs: number;
      maxRequests: number;
      skipSuccessfulRequests: boolean;
      skipFailedRequests: boolean;
    };
    ddosProtection: {
      enabled: boolean;
      thresholds: {
        requests_per_second: number;
        concurrent_connections: number;
        bandwidth_mbps: number;
      };
    };
  };

  // Infrastructure Security
  infrastructureSecurity: {
    networkSecurity: {
      segmentationEnabled: boolean;
      firewallRules: FirewallRule[];
      allowedCidrs: string[];
      blockedCountries: string[];
    };
    tlsSecurity: {
      version: "1.2" | "1.3";
      hstsEnabled: boolean;
      hstsMaxAge: number;
      certificatePinning: {
        enabled: boolean;
        pins: string[];
        backupPins: string[];
      };
    };
    wafConfiguration: {
      enabled: boolean;
      ruleSets: string[];
      customRules: WafRule[];
      geoBlocking: string[];
    };
    secretsManagement: {
      rotationInterval: number; // days
      vaultIntegration: boolean;
      encryptionAtRest: boolean;
      accessLogging: boolean;
    };
  };

  // Compliance and Auditing
  compliance: {
    siemIntegration: {
      enabled: boolean;
      provider: "splunk" | "elk" | "sentinel" | "custom";
      endpoint: string;
      indexPattern: string;
    };
    auditLogging: {
      enabled: boolean;
      retentionYears: number;
      encryptLogs: boolean;
      realTimeAnalysis: boolean;
    };
    piiDetection: {
      enabled: boolean;
      patterns: string[];
      maskingStrategy: "full" | "partial" | "hash";
      alertOnDetection: boolean;
    };
    gdprCompliance: {
      enabled: boolean;
      automatedResponseTime: number; // hours
      dataSubjectPortal: string;
      consentManagement: boolean;
    };
    soc2Compliance: {
      enabled: boolean;
      controls: string[];
      evidenceCollection: boolean;
      continuousMonitoring: boolean;
    };
  };

  // Incident Response
  incidentResponse: {
    automated: boolean;
    escalationMatrix: EscalationLevel[];
    runbookPaths: string[];
    forensicsEnabled: boolean;
    threatIntelIntegration: boolean;
  };
}

export interface FirewallRule {
  id: string;
  name: string;
  action: "allow" | "deny" | "log";
  protocol: "tcp" | "udp" | "icmp" | "all";
  sourceIp?: string;
  destinationIp?: string;
  sourcePort?: number | string;
  destinationPort?: number | string;
  priority: number;
  enabled: boolean;
}

export interface WafRule {
  id: string;
  name: string;
  condition: string;
  action: "block" | "challenge" | "log" | "allow";
  severity: "low" | "medium" | "high" | "critical";
  enabled: boolean;
}

export interface EscalationLevel {
  level: number;
  title: string;
  severity: "low" | "medium" | "high" | "critical";
  timeToEscalate: number; // minutes
  contacts: string[];
  actions: string[];
}

export interface SecurityIncident {
  id: string;
  title: string;
  description: string;
  severity: "low" | "medium" | "high" | "critical";
  status: "open" | "investigating" | "contained" | "resolved" | "closed";
  category:
    | "malware"
    | "data_breach"
    | "unauthorized_access"
    | "ddos"
    | "insider_threat"
    | "other";
  detectedAt: Date;
  reportedBy: string;
  assignedTo?: string;
  affectedSystems: string[];
  affectedUsers: string[];
  timeline: IncidentEvent[];
  evidence: Evidence[];
  mitigationSteps: string[];
  rootCause?: string;
  lessonsLearned?: string[];
  resolvedAt?: Date;
  cost?: number;
}

export interface IncidentEvent {
  timestamp: Date;
  type:
    | "detection"
    | "escalation"
    | "mitigation"
    | "communication"
    | "resolution";
  description: string;
  actor: string;
  automated: boolean;
}

export interface Evidence {
  id: string;
  type:
    | "log"
    | "screenshot"
    | "network_capture"
    | "memory_dump"
    | "file"
    | "other";
  description: string;
  filePath?: string;
  hash: string;
  collectedAt: Date;
  collectedBy: string;
  chainOfCustody: CustodyEvent[];
}

export interface CustodyEvent {
  timestamp: Date;
  action: "collected" | "transferred" | "analyzed" | "stored" | "disposed";
  actor: string;
  details: string;
}

export interface ThreatDetectionRule {
  id: string;
  name: string;
  description: string;
  category:
    | "authentication"
    | "authorization"
    | "data_access"
    | "network"
    | "behavioral";
  severity: "low" | "medium" | "high" | "critical";
  query: string;
  threshold: number;
  timeWindow: number; // minutes
  enabled: boolean;
  actions: string[];
  falsePositiveRate?: number;
  lastTriggered?: Date;
}

export interface VulnerabilityAssessment {
  id: string;
  target: string;
  type: "automated" | "manual" | "penetration_test";
  startedAt: Date;
  completedAt?: Date;
  findings: VulnerabilityFinding[];
  riskScore: number;
  remediationPlan?: string[];
  nextAssessmentDate?: Date;
}

export interface VulnerabilityFinding {
  id: string;
  title: string;
  description: string;
  severity: "info" | "low" | "medium" | "high" | "critical";
  cvss3Score?: number;
  cve?: string;
  category: string;
  location: string;
  impact: string;
  recommendation: string;
  status: "open" | "acknowledged" | "mitigated" | "resolved" | "accepted";
  dueDate?: Date;
}

export class ProductionSecurityHardening extends EventEmitter {
  private logger: Logger;
  private config: ProductionSecurityConfig;
  private db: DatabaseConnection;

  // Security Components
  private inputValidator: InputValidator;
  private xssProtector: XssProtector;
  private csrfProtector: CsrfProtector;
  private rateLimiter: RateLimiter;
  private ddosProtector: DdosProtector;
  private firewallManager: FirewallManager;
  private tlsManager: TlsManager;
  private wafManager: WafManager;
  private secretsManager: SecretsManager;
  private siemIntegrator: SiemIntegrator;
  private auditLogger: ProductionAuditLogger;
  private piiDetector: PiiDetector;
  private gdprManager: GdprManager;
  private soc2Manager: Soc2Manager;
  private incidentManager: IncidentManager;
  private threatDetector: ThreatDetector;
  private forensicsCollector: ForensicsCollector;

  // State Management
  private activeIncidents: Map<string, SecurityIncident> = new Map();
  private threatRules: Map<string, ThreatDetectionRule> = new Map();
  private vulnerabilities: Map<string, VulnerabilityAssessment> = new Map();
  private securityMetrics = {
    blockedRequests: 0,
    detectedThreats: 0,
    incidentsCreated: 0,
    vulnerabilitiesFound: 0,
    complianceViolations: 0,
    encryptionOperations: 0,
    auditEventsGenerated: 0,
    piiDetections: 0,
  };

  constructor(config: ProductionSecurityConfig, db: DatabaseConnection) {
    super();
    this.logger = new Logger("ProductionSecurityHardening");
    this.config = config;
    this.db = db;

    this.initializeSecurityComponents();
    this.setupSecurityMiddleware();
    this.startMonitoring();

    this.logger.info("Production Security Hardening initialized", {
      environment: config.environment,
      enforcementLevel: config.enforcementLevel,
      featuresEnabled: this.getEnabledFeatures(),
    });
  }

  /**
   * 🔒 Application Security Implementation
   */

  /**
   * Input Validation and Sanitization
   */
  async validateAndSanitizeInput(
    input: any,
    schema: {
      type: "string" | "number" | "email" | "url" | "json" | "html";
      maxLength?: number;
      allowedChars?: string;
      required?: boolean;
      customValidation?: (value: any) => boolean;
    },
  ): Promise<{ isValid: boolean; sanitized: any; errors: string[] }> {
    try {
      const errors: string[] = [];
      let sanitized = input;

      // Required check
      if (
        schema.required &&
        (input === null || input === undefined || input === "")
      ) {
        errors.push("Field is required");
        return { isValid: false, sanitized: null, errors };
      }

      // Type-specific validation and sanitization
      switch (schema.type) {
        case "string":
          if (typeof input !== "string") {
            errors.push("Input must be a string");
            break;
          }

          // Length validation
          if (schema.maxLength && input.length > schema.maxLength) {
            errors.push(`Input exceeds maximum length of ${schema.maxLength}`);
          }

          // Character whitelist validation
          if (schema.allowedChars) {
            const regex = new RegExp(`^[${schema.allowedChars}]*$`);
            if (!regex.test(input)) {
              errors.push("Input contains invalid characters");
            }
          }

          // SQL injection prevention
          if (
            this.config.applicationSecurity.inputValidation
              .sqlInjectionPrevention
          ) {
            if (this.containsSqlInjection(input)) {
              errors.push("Potential SQL injection detected");
              this.logger.warn("SQL injection attempt blocked", {
                input: input.substring(0, 100),
              });
            }
          }

          // XSS prevention
          sanitized = DOMPurify.sanitize(input, {
            ALLOWED_TAGS:
              this.config.applicationSecurity.inputValidation.allowedTags,
            ALLOWED_ATTR: ["href", "src", "alt", "title"],
          });

          break;

        case "email":
          if (!validator.isEmail(input)) {
            errors.push("Invalid email format");
          }
          sanitized = validator.normalizeEmail(input) || input;
          break;

        case "url":
          if (!validator.isURL(input, { require_protocol: true })) {
            errors.push("Invalid URL format");
          }
          break;

        case "number":
          if (!validator.isNumeric(input.toString())) {
            errors.push("Input must be a number");
          }
          sanitized = parseFloat(input);
          break;

        case "json":
          try {
            sanitized = JSON.parse(input);
          } catch {
            errors.push("Invalid JSON format");
          }
          break;

        case "html":
          // Strict HTML sanitization
          sanitized = DOMPurify.sanitize(input, {
            ALLOWED_TAGS: [
              "p",
              "br",
              "strong",
              "em",
              "u",
              "h1",
              "h2",
              "h3",
              "h4",
              "h5",
              "h6",
            ],
            ALLOWED_ATTR: [],
          });
          break;
      }

      // Custom validation
      if (schema.customValidation && !schema.customValidation(sanitized)) {
        errors.push("Custom validation failed");
      }

      const isValid = errors.length === 0;

      if (isValid) {
        this.securityMetrics.encryptionOperations++;
      } else {
        await this.auditLogger.logSecurityEvent({
          type: "input_validation_failed",
          severity: "medium",
          details: {
            errors,
            originalInput: input.toString().substring(0, 100),
          },
        });
      }

      return { isValid, sanitized, errors };
    } catch (error) {
      this.logger.error("Input validation failed", { error, input });
      return { isValid: false, sanitized: null, errors: ["Validation error"] };
    }
  }

  /**
   * SQL Injection Prevention with Parameterized Queries
   */
  async executeParameterizedQuery(
    query: string,
    parameters: any[],
    options: {
      readOnly?: boolean;
      timeout?: number;
      maxRows?: number;
    } = {},
  ): Promise<any> {
    try {
      // Validate query structure
      if (this.containsDangerousSqlPatterns(query)) {
        throw new Error("Query contains potentially dangerous patterns");
      }

      // Log query for audit
      await this.auditLogger.logSecurityEvent({
        type: "database_query_executed",
        severity: "low",
        details: {
          query: query.substring(0, 200),
          parameterCount: parameters.length,
          readOnly: options.readOnly || false,
        },
      });

      // Execute with connection pool
      const connection = await this.db.getConnection();

      try {
        // Set query timeout
        if (options.timeout) {
          await connection.run(`PRAGMA busy_timeout = ${options.timeout}`);
        }

        // Execute parameterized query
        let result;
        if (options.readOnly) {
          result = await connection.all(query, parameters);

          // Limit result size
          if (options.maxRows && result.length > options.maxRows) {
            result = result.slice(0, options.maxRows);
            this.logger.warn("Query result truncated due to maxRows limit", {
              originalCount: result.length,
              maxRows: options.maxRows,
            });
          }
        } else {
          result = await connection.run(query, parameters);
        }

        return result;
      } finally {
        this.db.releaseConnection(connection);
      }
    } catch (error) {
      this.logger.error("Parameterized query execution failed", {
        error,
        query,
      });

      // Log potential attack
      if (this.containsSqlInjection(query)) {
        await this.createSecurityIncident({
          title: "SQL Injection Attempt Detected",
          description: "Potential SQL injection attack blocked",
          severity: "high",
          category: "unauthorized_access",
          evidence: [
            {
              type: "log",
              description: "Blocked SQL query",
              hash: crypto.createHash("sha256").update(query).digest("hex"),
            },
          ],
        });
      }

      throw error;
    }
  }

  /**
   * XSS Protection with CSP Headers and Output Encoding
   */
  getXssProtectionHeaders(): Record<string, string> {
    const csp =
      this.config.applicationSecurity.xssProtection.contentSecurityPolicy;

    return {
      "Content-Security-Policy": csp,
      "X-Content-Type-Options": "nosniff",
      "X-Frame-Options":
        this.config.applicationSecurity.xssProtection.frameOptions,
      "X-XSS-Protection": this.config.applicationSecurity.xssProtection
        .xssFilter
        ? "1; mode=block"
        : "0",
      "Referrer-Policy": "strict-origin-when-cross-origin",
      "Permissions-Policy":
        "camera=(), microphone=(), geolocation=(), payment=()",
    };
  }

  /**
   * CSRF Token Management
   */
  async generateCsrfToken(sessionId: string): Promise<string> {
    const token = crypto.randomBytes(32).toString("hex");
    const expiresAt = new Date(
      Date.now() + this.config.applicationSecurity.csrfProtection.tokenExpiry,
    );

    // Store token
    await this.db.executeQuery(
      "INSERT OR REPLACE INTO csrf_tokens (session_id, token, expires_at, created_at) VALUES (?, ?, ?, ?)",
      [sessionId, token, expiresAt.toISOString(), new Date().toISOString()],
    );

    return token;
  }

  async validateCsrfToken(sessionId: string, token: string): Promise<boolean> {
    try {
      const result = await this.db.executeQuery(
        "SELECT token, expires_at FROM csrf_tokens WHERE session_id = ? AND token = ?",
        [sessionId, token],
      );

      if (!result || result.length === 0) {
        await this.auditLogger.logSecurityEvent({
          type: "csrf_token_invalid",
          severity: "medium",
          details: { sessionId, tokenProvided: !!token },
        });
        return false;
      }

      const tokenData = result[0];
      const expiresAt = new Date(tokenData.expires_at);

      if (expiresAt < new Date()) {
        await this.auditLogger.logSecurityEvent({
          type: "csrf_token_expired",
          severity: "medium",
          details: { sessionId, expiresAt },
        });
        return false;
      }

      // Clean up used token
      await this.db.executeQuery(
        "DELETE FROM csrf_tokens WHERE session_id = ? AND token = ?",
        [sessionId, token],
      );

      return true;
    } catch (error) {
      this.logger.error("CSRF token validation failed", { error, sessionId });
      return false;
    }
  }

  /**
   * Rate Limiting and DDoS Protection
   */
  createRateLimitMiddleware() {
    const config = this.config.applicationSecurity.rateLimiting;

    return rateLimit({
      windowMs: config.windowMs,
      max: config.maxRequests,
      skipSuccessfulRequests: config.skipSuccessfulRequests,
      skipFailedRequests: config.skipFailedRequests,
      standardHeaders: true,
      legacyHeaders: false,
      handler: async (req: any, res: any) => {
        const clientIp = req.ip || req.connection.remoteAddress;

        // Log rate limit violation
        await this.auditLogger.logSecurityEvent({
          type: "rate_limit_exceeded",
          severity: "medium",
          details: {
            clientIp,
            userAgent: req.headers["user-agent"],
            path: req.path,
            method: req.method,
          },
        });

        this.securityMetrics.blockedRequests++;

        // Check if this IP should be temporarily blocked
        await this.checkForDdosPattern(clientIp);

        res.status(429).json({
          error: "Too many requests",
          retryAfter: Math.ceil(config.windowMs / 1000),
        });
      },
      skip: (req: any) => {
        // Skip rate limiting for health checks and internal services
        const path = req.path;
        return path.startsWith("/health") || path.startsWith("/internal/");
      },
    });
  }

  async checkForDdosPattern(clientIp: string): Promise<void> {
    const thresholds =
      this.config.applicationSecurity.ddosProtection.thresholds;

    // Get recent requests from this IP
    const recentRequests = await this.db.executeQuery(
      `SELECT COUNT(*) as count FROM audit_logs 
       WHERE json_extract(details, '$.clientIp') = ? 
       AND created_at > datetime('now', '-1 minute')`,
      [clientIp],
    );

    if (recentRequests[0]?.count > thresholds.requests_per_second * 60) {
      // Potential DDoS attack
      await this.createSecurityIncident({
        title: "Potential DDoS Attack Detected",
        description: `High request volume from IP ${clientIp}`,
        severity: "high",
        category: "ddos",
        evidence: [
          {
            type: "log",
            description: `Request count: ${recentRequests[0].count} in 1 minute`,
            hash: crypto
              .createHash("sha256")
              .update(`ddos-${clientIp}-${Date.now()}`)
              .digest("hex"),
          },
        ],
      });

      // Temporarily block IP
      await this.firewallManager.addTemporaryBlock(clientIp, 3600); // 1 hour
    }
  }

  /**
   * 🏗️ Infrastructure Security Implementation
   */

  /**
   * Network Segmentation and Firewall Rules
   */
  async configureNetworkSecurity(): Promise<void> {
    const config = this.config.infrastructureSecurity.networkSecurity;

    if (!config.segmentationEnabled) {
      return;
    }

    // Apply firewall rules
    for (const rule of config.firewallRules) {
      if (rule.enabled) {
        await this.firewallManager.applyRule(rule);
      }
    }

    // Configure geo-blocking
    for (const country of config.blockedCountries) {
      await this.firewallManager.blockCountry(country);
    }

    this.logger.info("Network security configured", {
      rulesApplied: config.firewallRules.length,
      blockedCountries: config.blockedCountries.length,
    });
  }

  /**
   * TLS 1.3 Enforcement with HSTS
   */
  getTlsSecurityHeaders(): Record<string, string> {
    const tlsConfig = this.config.infrastructureSecurity.tlsSecurity;
    const headers: Record<string, string> = {};

    if (tlsConfig.hstsEnabled) {
      headers["Strict-Transport-Security"] =
        `max-age=${tlsConfig.hstsMaxAge}; includeSubDomains; preload`;
    }

    // Additional security headers
    headers["X-Content-Type-Options"] = "nosniff";
    headers["X-Download-Options"] = "noopen";
    headers["X-Permitted-Cross-Domain-Policies"] = "none";

    return headers;
  }

  /**
   * Certificate Pinning Configuration
   */
  getCertificatePinningConfig(): any {
    const pinning =
      this.config.infrastructureSecurity.tlsSecurity.certificatePinning;

    if (!pinning.enabled) {
      return null;
    }

    return {
      pins: pinning.pins,
      backupPins: pinning.backupPins,
      maxAge: 90 * 24 * 60 * 60, // 90 days
      includeSubdomains: true,
      reportUri: "/api/security/pin-report",
    };
  }

  /**
   * WAF Configuration for API Protection
   */
  async configureWaf(): Promise<void> {
    const wafConfig = this.config.infrastructureSecurity.wafConfiguration;

    if (!wafConfig.enabled) {
      return;
    }

    // Apply built-in rule sets
    for (const ruleSet of wafConfig.ruleSets) {
      await this.wafManager.enableRuleSet(ruleSet);
    }

    // Apply custom rules
    for (const rule of wafConfig.customRules) {
      if (rule.enabled) {
        await this.wafManager.addCustomRule(rule);
      }
    }

    // Configure geo-blocking
    for (const country of wafConfig.geoBlocking) {
      await this.wafManager.blockGeography(country);
    }

    this.logger.info("WAF configured", {
      ruleSets: wafConfig.ruleSets.length,
      customRules: wafConfig.customRules.length,
      geoBlocks: wafConfig.geoBlocking.length,
    });
  }

  /**
   * Secrets Rotation Policies
   */
  async rotateSecrets(): Promise<void> {
    const secretsConfig = this.config.infrastructureSecurity.secretsManagement;

    // Get secrets due for rotation
    const dueSecrets = await this.secretsManager.getSecretsForRotation(
      secretsConfig.rotationInterval,
    );

    for (const secret of dueSecrets) {
      try {
        const newSecret = await this.secretsManager.generateNewSecret(
          secret.type,
        );
        await this.secretsManager.rotateSecret(secret.id, newSecret);

        await this.auditLogger.logSecurityEvent({
          type: "secret_rotated",
          severity: "low",
          details: {
            secretId: secret.id,
            secretType: secret.type,
            lastRotation: secret.lastRotated,
          },
        });
      } catch (error) {
        this.logger.error("Secret rotation failed", {
          error,
          secretId: secret.id,
        });

        await this.createSecurityIncident({
          title: "Secret Rotation Failure",
          description: `Failed to rotate secret ${secret.id}`,
          severity: "medium",
          category: "other",
        });
      }
    }
  }

  /**
   * 📊 Compliance and Auditing Implementation
   */

  /**
   * SIEM Integration
   */
  async forwardToSiem(event: any): Promise<void> {
    const siemConfig = this.config.compliance.siemIntegration;

    if (!siemConfig.enabled) {
      return;
    }

    try {
      await this.siemIntegrator.forwardEvent(event, {
        provider: siemConfig.provider,
        endpoint: siemConfig.endpoint,
        indexPattern: siemConfig.indexPattern,
      });
    } catch (error) {
      this.logger.error("SIEM forwarding failed", { error, event });
    }
  }

  /**
   * Audit Log Aggregation and Retention
   */
  async aggregateAuditLogs(): Promise<void> {
    const auditConfig = this.config.compliance.auditLogging;

    if (!auditConfig.enabled) {
      return;
    }

    // Get logs older than retention period
    const retentionDate = new Date();
    retentionDate.setFullYear(
      retentionDate.getFullYear() - auditConfig.retentionYears,
    );

    // Archive old logs
    const oldLogs = await this.db.executeQuery(
      "SELECT * FROM audit_logs WHERE created_at < ?",
      [retentionDate.toISOString()],
    );

    if (oldLogs.length > 0) {
      // Archive to long-term storage
      await this.auditLogger.archiveLogs(oldLogs);

      // Remove from active database
      await this.db.executeQuery(
        "DELETE FROM audit_logs WHERE created_at < ?",
        [retentionDate.toISOString()],
      );

      this.logger.info("Audit logs archived", {
        archivedCount: oldLogs.length,
        retentionDate,
      });
    }
  }

  /**
   * PII Detection and Masking
   */
  async detectAndMaskPii(
    data: any,
  ): Promise<{ masked: any; piiDetected: boolean; patterns: string[] }> {
    const piiConfig = this.config.compliance.piiDetection;

    if (!piiConfig.enabled) {
      return { masked: data, piiDetected: false, patterns: [] };
    }

    const detectedPatterns: string[] = [];
    let masked = JSON.parse(JSON.stringify(data)); // Deep clone

    // Check for PII patterns
    for (const pattern of piiConfig.patterns) {
      const regex = new RegExp(pattern, "gi");
      const stringData = JSON.stringify(data);

      if (regex.test(stringData)) {
        detectedPatterns.push(pattern);

        // Apply masking based on strategy
        masked = this.applyPiiMasking(
          masked,
          pattern,
          piiConfig.maskingStrategy,
        );
      }
    }

    if (detectedPatterns.length > 0) {
      this.securityMetrics.piiDetections++;

      if (piiConfig.alertOnDetection) {
        await this.auditLogger.logSecurityEvent({
          type: "pii_detected",
          severity: "medium",
          details: {
            patterns: detectedPatterns,
            maskingStrategy: piiConfig.maskingStrategy,
          },
        });
      }
    }

    return {
      masked,
      piiDetected: detectedPatterns.length > 0,
      patterns: detectedPatterns,
    };
  }

  /**
   * GDPR Data Subject Request Automation
   */
  async handleGdprRequest(request: {
    type:
      | "access"
      | "rectification"
      | "erasure"
      | "portability"
      | "restriction";
    subjectId: string;
    requesterEmail: string;
    verificationData: any;
    scope?: string[];
  }): Promise<{
    requestId: string;
    status: "pending" | "approved" | "completed" | "rejected";
    responseData?: any;
    estimatedCompletion?: Date;
  }> {
    const requestId = crypto.randomUUID();
    const gdprConfig = this.config.compliance.gdprCompliance;

    if (!gdprConfig.enabled) {
      throw new Error("GDPR compliance not enabled");
    }

    // Verify identity
    const identityVerified = await this.gdprManager.verifyIdentity(
      request.subjectId,
      request.requesterEmail,
      request.verificationData,
    );

    if (!identityVerified) {
      return {
        requestId,
        status: "rejected",
      };
    }

    const estimatedCompletion = new Date(
      Date.now() + gdprConfig.automatedResponseTime * 60 * 60 * 1000,
    );

    // Store request
    await this.db.executeQuery(
      `INSERT INTO gdpr_requests 
       (id, type, subject_id, requester_email, status, created_at, estimated_completion) 
       VALUES (?, ?, ?, ?, ?, ?, ?)`,
      [
        requestId,
        request.type,
        request.subjectId,
        request.requesterEmail,
        "pending",
        new Date().toISOString(),
        estimatedCompletion.toISOString(),
      ],
    );

    // Process request based on type
    let responseData: any = null;
    let status: "pending" | "approved" | "completed" | "rejected" = "pending";

    try {
      switch (request.type) {
        case "access":
          responseData = await this.gdprManager.generateAccessReport(
            request.subjectId,
            request.scope,
          );
          status = "completed";
          break;

        case "erasure":
          await this.gdprManager.erasePersonalData(
            request.subjectId,
            request.scope,
          );
          status = "completed";
          break;

        case "portability":
          responseData = await this.gdprManager.exportPersonalData(
            request.subjectId,
            request.scope,
          );
          status = "completed";
          break;

        default:
          // Other types require manual processing
          status = "pending";
      }

      // Update request status
      await this.db.executeQuery(
        "UPDATE gdpr_requests SET status = ?, response_data = ?, completed_at = ? WHERE id = ?",
        [
          status,
          responseData ? JSON.stringify(responseData) : null,
          status === "completed" ? new Date().toISOString() : null,
          requestId,
        ],
      );
    } catch (error) {
      this.logger.error("GDPR request processing failed", { error, requestId });
      status = "rejected";
    }

    // Log request processing
    await this.auditLogger.logSecurityEvent({
      type: "gdpr_request_processed",
      severity: "low",
      details: {
        requestId,
        type: request.type,
        subjectId: request.subjectId,
        status,
      },
    });

    return {
      requestId,
      status,
      responseData,
      estimatedCompletion:
        status === "pending" ? estimatedCompletion : undefined,
    };
  }

  /**
   * SOC2 Type II Compliance Checklist
   */
  async generateSoc2ComplianceReport(): Promise<{
    overallStatus: "compliant" | "non_compliant" | "partial";
    controls: Array<{
      id: string;
      name: string;
      status: "pass" | "fail" | "not_applicable";
      evidence: string[];
      findings: string[];
      recommendations: string[];
    }>;
    lastAssessment: Date;
    nextAssessment: Date;
  }> {
    const soc2Config = this.config.compliance.soc2Compliance;

    if (!soc2Config.enabled) {
      throw new Error("SOC2 compliance not enabled");
    }

    const controls = await this.soc2Manager.assessControls(soc2Config.controls);
    const passedControls = controls.filter((c) => c.status === "pass").length;
    const totalControls = controls.filter(
      (c) => c.status !== "not_applicable",
    ).length;

    let overallStatus: "compliant" | "non_compliant" | "partial";
    if (passedControls === totalControls) {
      overallStatus = "compliant";
    } else if (passedControls > totalControls * 0.8) {
      overallStatus = "partial";
    } else {
      overallStatus = "non_compliant";
    }

    const lastAssessment = new Date();
    const nextAssessment = new Date(Date.now() + 365 * 24 * 60 * 60 * 1000); // 1 year

    // Store compliance report
    await this.db.executeQuery(
      `INSERT INTO compliance_reports 
       (id, type, status, controls_passed, controls_total, created_at, next_assessment) 
       VALUES (?, ?, ?, ?, ?, ?, ?)`,
      [
        crypto.randomUUID(),
        "SOC2",
        overallStatus,
        passedControls,
        totalControls,
        lastAssessment.toISOString(),
        nextAssessment.toISOString(),
      ],
    );

    return {
      overallStatus,
      controls,
      lastAssessment,
      nextAssessment,
    };
  }

  /**
   * 🚨 Incident Response Implementation
   */

  /**
   * Security Incident Creation and Management
   */
  async createSecurityIncident(
    incident: Omit<
      SecurityIncident,
      "id" | "detectedAt" | "status" | "timeline"
    >,
  ): Promise<string> {
    const incidentId = crypto.randomUUID();
    const now = new Date();

    const fullIncident: SecurityIncident = {
      id: incidentId,
      detectedAt: now,
      status: "open",
      timeline: [
        {
          timestamp: now,
          type: "detection",
          description: "Incident created",
          actor: "system",
          automated: true,
        },
      ],
      ...incident,
    };

    this.activeIncidents.set(incidentId, fullIncident);
    this.securityMetrics.incidentsCreated++;

    // Store in database
    await this.db.executeQuery(
      `INSERT INTO security_incidents 
       (id, title, description, severity, category, status, detected_at, created_at) 
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
      [
        incidentId,
        incident.title,
        incident.description,
        incident.severity,
        incident.category,
        "open",
        now.toISOString(),
        now.toISOString(),
      ],
    );

    // Trigger escalation based on severity
    await this.escalateIncident(incidentId, incident.severity);

    // Start forensics collection
    if (this.config.incidentResponse.forensicsEnabled) {
      await this.forensicsCollector.startCollection(incidentId);
    }

    // Log incident creation
    await this.auditLogger.logSecurityEvent({
      type: "security_incident_created",
      severity: incident.severity,
      details: {
        incidentId,
        category: incident.category,
        title: incident.title,
      },
    });

    this.emit("incident_created", fullIncident);

    this.logger.warn("Security incident created", {
      incidentId,
      title: incident.title,
      severity: incident.severity,
      category: incident.category,
    });

    return incidentId;
  }

  /**
   * Automated Threat Detection
   */
  async runThreatDetection(): Promise<void> {
    for (const [ruleId, rule] of this.threatRules) {
      if (!rule.enabled) continue;

      try {
        const matches = await this.executeDetectionQuery(rule);

        if (matches.length >= rule.threshold) {
          await this.handleThreatDetection(rule, matches);

          // Update last triggered
          rule.lastTriggered = new Date();
          this.securityMetrics.detectedThreats++;
        }
      } catch (error) {
        this.logger.error("Threat detection rule failed", {
          error,
          ruleId: rule.id,
          ruleName: rule.name,
        });
      }
    }
  }

  async executeDetectionQuery(rule: ThreatDetectionRule): Promise<any[]> {
    // Calculate time window
    const windowStart = new Date(Date.now() - rule.timeWindow * 60 * 1000);

    // Execute rule query with time window
    const query = rule.query.replace(
      "${time_window}",
      windowStart.toISOString(),
    );

    return await this.db.executeQuery(query);
  }

  async handleThreatDetection(
    rule: ThreatDetectionRule,
    matches: any[],
  ): Promise<void> {
    // Create security incident
    const incidentId = await this.createSecurityIncident({
      title: `Threat Detected: ${rule.name}`,
      description: rule.description,
      severity: rule.severity,
      category: this.mapRuleCategoryToIncidentCategory(rule.category),
      reportedBy: "automated_detection",
      affectedSystems: this.extractAffectedSystems(matches),
      affectedUsers: this.extractAffectedUsers(matches),
      evidence: matches.map((match) => ({
        id: crypto.randomUUID(),
        type: "log" as const,
        description: `Detection rule match: ${rule.name}`,
        hash: crypto
          .createHash("sha256")
          .update(JSON.stringify(match))
          .digest("hex"),
        collectedAt: new Date(),
        collectedBy: "system",
        chainOfCustody: [],
      })),
      mitigationSteps: rule.actions,
    });

    // Execute automated actions
    for (const action of rule.actions) {
      try {
        await this.executeAutomatedAction(action, matches, incidentId);
      } catch (error) {
        this.logger.error("Automated action failed", {
          error,
          action,
          incidentId,
        });
      }
    }
  }

  /**
   * Incident Response Team Escalation
   */
  async escalateIncident(
    incidentId: string,
    severity: "low" | "medium" | "high" | "critical",
  ): Promise<void> {
    const escalationLevels =
      this.config.incidentResponse.escalationMatrix.filter((level) =>
        this.shouldEscalateToLevel(severity, level),
      );

    for (const level of escalationLevels) {
      try {
        await this.notifyEscalationLevel(incidentId, level);

        // Schedule auto-escalation if not resolved
        setTimeout(
          async () => {
            const incident = this.activeIncidents.get(incidentId);
            if (incident && incident.status === "open") {
              await this.autoEscalateIncident(incidentId, level.level + 1);
            }
          },
          level.timeToEscalate * 60 * 1000,
        );
      } catch (error) {
        this.logger.error("Escalation notification failed", {
          error,
          incidentId,
          level: level.level,
        });
      }
    }
  }

  /**
   * Forensics Data Collection
   */
  async collectForensicsData(
    incidentId: string,
    targets: {
      systems: string[];
      timeRange: { start: Date; end: Date };
      dataTypes: ("logs" | "network" | "memory" | "disk" | "registry")[];
    },
  ): Promise<Evidence[]> {
    const evidence: Evidence[] = [];

    for (const dataType of targets.dataTypes) {
      try {
        const collectionResult = await this.forensicsCollector.collect(
          dataType,
          targets.systems,
          targets.timeRange,
        );

        const evidenceItem: Evidence = {
          id: crypto.randomUUID(),
          type:
            dataType === "network"
              ? "network_capture"
              : dataType === "memory"
                ? "memory_dump"
                : "log",
          description: `${dataType} data collection`,
          filePath: collectionResult.filePath,
          hash: collectionResult.hash,
          collectedAt: new Date(),
          collectedBy: "system",
          chainOfCustody: [
            {
              timestamp: new Date(),
              action: "collected",
              actor: "system",
              details: `Automated collection for incident ${incidentId}`,
            },
          ],
        };

        evidence.push(evidenceItem);
      } catch (error) {
        this.logger.error("Forensics data collection failed", {
          error,
          dataType,
          incidentId,
        });
      }
    }

    // Update incident with evidence
    const incident = this.activeIncidents.get(incidentId);
    if (incident) {
      incident.evidence.push(...evidence);
      incident.timeline.push({
        timestamp: new Date(),
        type: "mitigation",
        description: `Collected ${evidence.length} pieces of forensic evidence`,
        actor: "system",
        automated: true,
      });
    }

    return evidence;
  }

  /**
   * 🔍 Monitoring and Metrics
   */

  getSecurityMetrics(): typeof this.securityMetrics & {
    activeIncidents: number;
    threatRules: number;
    averageResponseTime: number;
  } {
    return {
      ...this.securityMetrics,
      activeIncidents: this.activeIncidents.size,
      threatRules: this.threatRules.size,
      averageResponseTime: this.calculateAverageResponseTime(),
    };
  }

  async generateSecurityDashboard(): Promise<{
    summary: {
      status: "healthy" | "warning" | "critical";
      activeIncidents: number;
      recentThreats: number;
      complianceScore: number;
    };
    incidents: SecurityIncident[];
    threats: ThreatDetectionRule[];
    vulnerabilities: VulnerabilityFinding[];
    recommendations: string[];
  }> {
    // Calculate compliance score
    const complianceScore = await this.calculateComplianceScore();

    // Get recent threats (last 24 hours)
    const recentThreats = Array.from(this.threatRules.values()).filter(
      (rule) =>
        rule.lastTriggered &&
        rule.lastTriggered > new Date(Date.now() - 24 * 60 * 60 * 1000),
    ).length;

    // Determine overall status
    const criticalIncidents = Array.from(this.activeIncidents.values()).filter(
      (i) => i.severity === "critical" && i.status !== "resolved",
    ).length;

    const status =
      criticalIncidents > 0
        ? "critical"
        : this.activeIncidents.size > 5 || recentThreats > 10
          ? "warning"
          : "healthy";

    // Get recent vulnerabilities
    const vulnerabilities = Array.from(this.vulnerabilities.values())
      .flatMap((assessment) => assessment.findings)
      .filter((finding) => finding.status !== "resolved")
      .sort((a, b) => (b.cvss3Score || 0) - (a.cvss3Score || 0))
      .slice(0, 10);

    // Generate recommendations
    const recommendations = await this.generateSecurityRecommendations({
      activeIncidents: this.activeIncidents.size,
      recentThreats,
      complianceScore,
      vulnerabilities: vulnerabilities.length,
    });

    return {
      summary: {
        status,
        activeIncidents: this.activeIncidents.size,
        recentThreats,
        complianceScore,
      },
      incidents: Array.from(this.activeIncidents.values()).slice(0, 10),
      threats: Array.from(this.threatRules.values())
        .filter((rule) => rule.lastTriggered)
        .sort((a, b) => b.lastTriggered!.getTime() - a.lastTriggered!.getTime())
        .slice(0, 10),
      vulnerabilities,
      recommendations,
    };
  }

  /**
   * Private Implementation Methods
   */

  private initializeSecurityComponents(): void {
    // Initialize all security components
    this.inputValidator = new InputValidator(this.config);
    this.xssProtector = new XssProtector(this.config);
    this.csrfProtector = new CsrfProtector(this.config);
    this.rateLimiter = new RateLimiter(this.config);
    this.ddosProtector = new DdosProtector(this.config);
    this.firewallManager = new FirewallManager(this.config);
    this.tlsManager = new TlsManager(this.config);
    this.wafManager = new WafManager(this.config);
    this.secretsManager = new SecretsManager(this.config, this.db);
    this.siemIntegrator = new SiemIntegrator(this.config);
    this.auditLogger = new ProductionAuditLogger(this.config, this.db);
    this.piiDetector = new PiiDetector(this.config);
    this.gdprManager = new GdprManager(this.config, this.db);
    this.soc2Manager = new Soc2Manager(this.config, this.db);
    this.incidentManager = new IncidentManager(this.config, this.db);
    this.threatDetector = new ThreatDetector(this.config, this.db);
    this.forensicsCollector = new ForensicsCollector(this.config);

    // Load threat detection rules
    this.loadThreatDetectionRules();
  }

  private setupSecurityMiddleware(): void {
    // This would typically be called during Express/Fastify setup
    // Implementation would depend on the web framework being used
  }

  private startMonitoring(): void {
    // Start periodic security tasks
    setInterval(() => {
      this.runThreatDetection().catch((error) => {
        this.logger.error("Threat detection failed", { error });
      });
    }, 60000); // Every minute

    setInterval(() => {
      this.aggregateAuditLogs().catch((error) => {
        this.logger.error("Audit log aggregation failed", { error });
      });
    }, 3600000); // Every hour

    setInterval(() => {
      this.rotateSecrets().catch((error) => {
        this.logger.error("Secret rotation failed", { error });
      });
    }, 86400000); // Every day
  }

  private getEnabledFeatures(): string[] {
    const features: string[] = [];

    if (this.config.applicationSecurity.inputValidation.enabled)
      features.push("input_validation");
    if (this.config.applicationSecurity.xssProtection.enabled)
      features.push("xss_protection");
    if (this.config.applicationSecurity.csrfProtection.enabled)
      features.push("csrf_protection");
    if (this.config.applicationSecurity.rateLimiting.enabled)
      features.push("rate_limiting");
    if (this.config.applicationSecurity.ddosProtection.enabled)
      features.push("ddos_protection");
    if (this.config.infrastructureSecurity.networkSecurity.segmentationEnabled)
      features.push("network_segmentation");
    if (this.config.infrastructureSecurity.tlsSecurity.hstsEnabled)
      features.push("hsts");
    if (this.config.infrastructureSecurity.wafConfiguration.enabled)
      features.push("waf");
    if (this.config.compliance.siemIntegration.enabled) features.push("siem");
    if (this.config.compliance.auditLogging.enabled)
      features.push("audit_logging");
    if (this.config.compliance.piiDetection.enabled)
      features.push("pii_detection");
    if (this.config.compliance.gdprCompliance.enabled) features.push("gdpr");
    if (this.config.compliance.soc2Compliance.enabled) features.push("soc2");
    if (this.config.incidentResponse.automated)
      features.push("automated_incident_response");

    return features;
  }

  // Helper method implementations
  private containsSqlInjection(input: string): boolean {
    const sqlPatterns = [
      /('|(\-\-)|(;)|(\||\|)|(\*|\*))/i,
      /(union|select|insert|update|delete|drop|create|alter|exec|execute)/i,
      /(script|javascript|vbscript|onload|onerror)/i,
    ];

    return sqlPatterns.some((pattern) => pattern.test(input));
  }

  private containsDangerousSqlPatterns(query: string): boolean {
    const dangerousPatterns = [
      /;.*?(drop|delete|truncate|alter)/i,
      /union.*?select/i,
      /exec.*?\(/i,
      /xp_cmdshell/i,
    ];

    return dangerousPatterns.some((pattern) => pattern.test(query));
  }

  private applyPiiMasking(data: any, pattern: string, strategy: string): any {
    // Implementation would recursively traverse object and apply masking
    const stringData = JSON.stringify(data);
    const regex = new RegExp(pattern, "gi");

    let maskedString: string;
    switch (strategy) {
      case "full":
        maskedString = stringData.replace(regex, "***MASKED***");
        break;
      case "partial":
        maskedString = stringData.replace(regex, (match) => {
          const visible = Math.min(2, Math.floor(match.length * 0.2));
          return (
            match.substring(0, visible) + "*".repeat(match.length - visible)
          );
        });
        break;
      case "hash":
        maskedString = stringData.replace(regex, (match) => {
          return (
            crypto
              .createHash("sha256")
              .update(match)
              .digest("hex")
              .substring(0, 8) + "..."
          );
        });
        break;
      default:
        maskedString = stringData;
    }

    try {
      return JSON.parse(maskedString);
    } catch {
      return maskedString;
    }
  }

  private mapRuleCategoryToIncidentCategory(
    category: string,
  ): SecurityIncident["category"] {
    const mapping: Record<string, SecurityIncident["category"]> = {
      authentication: "unauthorized_access",
      authorization: "unauthorized_access",
      data_access: "data_breach",
      network: "ddos",
      behavioral: "insider_threat",
    };

    return mapping[category] || "other";
  }

  private extractAffectedSystems(matches: any[]): string[] {
    // Extract system information from detection matches
    return [...new Set(matches.map((match) => match.system_id || "unknown"))];
  }

  private extractAffectedUsers(matches: any[]): string[] {
    // Extract user information from detection matches
    return [...new Set(matches.map((match) => match.user_id).filter(Boolean))];
  }

  private async executeAutomatedAction(
    action: string,
    matches: any[],
    incidentId: string,
  ): Promise<void> {
    // Execute automated response actions
    switch (action) {
      case "block_ip":
        const ips = [
          ...new Set(matches.map((m) => m.client_ip).filter(Boolean)),
        ];
        for (const ip of ips) {
          await this.firewallManager.addTemporaryBlock(ip, 3600);
        }
        break;

      case "disable_user":
        const users = [
          ...new Set(matches.map((m) => m.user_id).filter(Boolean)),
        ];
        for (const userId of users) {
          await this.disableUserAccount(userId, incidentId);
        }
        break;

      case "alert_security_team":
        await this.notifySecurityTeam(incidentId, matches);
        break;

      default:
        this.logger.warn("Unknown automated action", { actio