/**
 * Security Module Index
 *
 * Central export point for all security-related functionality in ZCLAW.
 *
 * Modules:
 * - crypto-utils: AES-256-GCM encryption, key derivation, hashing
 * - secure-storage: OS keychain integration with encrypted localStorage fallback
 * - api-key-storage: Secure API key management
 * - encrypted-chat-storage: Encrypted chat history persistence
 * - security-audit: Security event logging and reporting
 * - security-utils: Input validation, XSS prevention, rate limiting
 */

import { createLogger } from './logger';

const log = createLogger('Security');

// Re-export crypto utilities
export {
  // Core encryption
  encrypt,
  decrypt,
  encryptObject,
  decryptObject,
  deriveKey,
  generateMasterKey,
  generateSalt,

  // Hashing
  hashSha256,
  hashSha512,

  // Utilities
  arrayToBase64,
  base64ToArray,
  constantTimeEqual,
  generateRandomString,
  secureWipe,
  clearKeyCache,
  isCryptoAvailable,
  isValidEncryptedData,
} from './crypto-utils';

export type { EncryptedData } from './crypto-utils';

// Re-export secure storage
export {
  secureStorage,
  isSecureStorageAvailable,
  storeDeviceKeys,
  getDeviceKeys,
  deleteDeviceKeys,
  hasDeviceKeys,
  getDeviceKeysCreatedAt,
} from './secure-storage';

export type { Ed25519KeyPair } from './secure-storage';

// Re-export API key storage
export {
  // Types
  type ApiKeyType,
  type ApiKeyMetadata,

  // Core functions
  storeApiKey,
  getApiKey,
  deleteApiKey,
  listApiKeyMetadata,
  updateApiKeyMetadata,
  hasApiKey,
  validateStoredApiKey,
  rotateApiKey,

  // Utility functions
  validateApiKeyFormat,
  exportApiKeyConfig,
  isUsingKeychain,
  generateTestApiKey,
} from './api-key-storage';

// Re-export encrypted chat storage
export {
  initializeEncryptedChatStorage,
  saveConversations,
  loadConversations,
  clearAllChatData,
  exportEncryptedBackup,
  importEncryptedBackup,
  isEncryptedStorageActive,
  getStorageStats,
  rotateEncryptionKey,
} from './encrypted-chat-storage';

// Re-export security audit
export {
  // Core logging
  logSecurityEvent,
  logAuthEvent,
  logKeyEvent,
  logDataEvent,
  logSecurityViolation,
  logDecryptionFailure,
  logIntegrityFailure,
  logPermissionEvent,
  logSessionEvent,
  logSuspiciousActivity,
  logRateLimitEvent,

  // Query functions
  getSecurityEvents,
  getSecurityEventsByType,
  getSecurityEventsBySeverity,
  getSecurityEventsByTimeRange,
  getRecentCriticalEvents,
  getSecurityEventsBySession,

  // Report generation
  generateSecurityAuditReport,

  // Maintenance
  clearSecurityAuditLog,
  exportSecurityEvents,
  importSecurityEvents,
  verifyAuditLogIntegrity,

  // Session management
  getCurrentSessionId,
  setCurrentSessionId,
  setAuditEnabled,
  isAuditEnabledState,
  initializeSecurityAudit,
  shutdownSecurityAudit,
} from './security-audit';

export type {
  SecurityEventType,
  SecurityEventSeverity,
  SecurityEvent,
  SecurityAuditReport,
} from './security-audit';

// Re-export security utilities
export {
  // HTML sanitization
  escapeHtml,
  unescapeHtml,
  sanitizeHtml,

  // URL validation
  validateUrl,
  isSafeRedirectUrl,

  // Path validation
  validatePath,

  // Input validation
  isValidEmail,
  isValidUsername,
  validatePasswordStrength,
  sanitizeFilename,
  sanitizeJson,

  // Rate limiting
  isRateLimited,
  resetRateLimit,
  getRemainingAttempts,

  // CSP helpers
  generateCspNonce,
  buildCspHeader,
  DEFAULT_CSP_DIRECTIVES,

  // Security checks
  checkSecurityHeaders,

  // Random generation
  generateSecureToken,
  generateSecureId,
} from './security-utils';

// ============================================================================
// Security Initialization
// ============================================================================

/**
 * Initialize all security modules
 * Call this during application startup
 */
export async function initializeSecurity(sessionId?: string): Promise<void> {
  // Initialize security audit first
  const { initializeSecurityAudit } = await import('./security-audit');
  initializeSecurityAudit(sessionId);

  // Initialize encrypted chat storage
  const { initializeEncryptedChatStorage } = await import('./encrypted-chat-storage');
  await initializeEncryptedChatStorage();

  log.debug('All security modules initialized');
}

/**
 * Shutdown all security modules
 * Call this during application shutdown
 */
export async function shutdownSecurity(): Promise<void> {
  const { shutdownSecurityAudit } = await import('./security-audit');
  shutdownSecurityAudit();

  const { clearKeyCache } = await import('./crypto-utils');
  clearKeyCache();

  log.debug('All security modules shut down');
}

/**
 * Get a comprehensive security status report
 */
export async function getSecurityStatus(): Promise<{
  auditEnabled: boolean;
  keychainAvailable: boolean;
  chatStorageInitialized: boolean;
  storedApiKeys: number;
  recentEvents: number;
  criticalEvents: number;
}> {
  const { isAuditEnabledState, getSecurityEventsBySeverity } = await import('./security-audit');
  const { isSecureStorageAvailable } = await import('./secure-storage');
  const { isEncryptedStorageActive: isChatStorageInitialized } = await import('./encrypted-chat-storage');
  const { listApiKeyMetadata } = await import('./api-key-storage');

  const criticalEvents = getSecurityEventsBySeverity('critical').length;
  const errorEvents = getSecurityEventsBySeverity('error').length;

  return {
    auditEnabled: isAuditEnabledState(),
    keychainAvailable: await isSecureStorageAvailable(),
    chatStorageInitialized: await isChatStorageInitialized(),
    storedApiKeys: (await listApiKeyMetadata()).length,
    recentEvents: criticalEvents + errorEvents,
    criticalEvents,
  };
}