import * as plugins from './plugins.js';
import * as paths from './paths.js';

// Certificate types are available via plugins.tsclass

// Import the email server and its configuration from smartmta
import {
  UnifiedEmailServer,
  type IUnifiedEmailServerOptions,
  type IEmailRoute,
  type IEmailDomainConfig,
} from '@push.rocks/smartmta';
import { logger } from './logger.js';
// Import storage manager
import { StorageManager, type IStorageConfig } from './storage/index.js';
import { StorageBackedCertManager } from './classes.storage-cert-manager.js';
import { CertProvisionScheduler } from './classes.cert-provision-scheduler.js';
// Import cache system
import { CacheDb, CacheCleaner, type ICacheDbOptions } from './cache/index.js';

import { OpsServer } from './opsserver/index.js';
import { MetricsManager } from './monitoring/index.js';
import { RadiusServer, type IRadiusServerConfig } from './radius/index.js';

export interface IDcRouterOptions {
  /** 
   * Direct SmartProxy configuration - gives full control over HTTP/HTTPS and TCP/SNI traffic
   * This is the preferred way to configure HTTP/HTTPS and general TCP/SNI traffic 
   */
  smartProxyConfig?: plugins.smartproxy.ISmartProxyOptions;
  
  /**
   * Email server configuration
   * This enables all email handling with pattern-based routing
   */
  emailConfig?: IUnifiedEmailServerOptions;
  
  /**
   * Custom email port configuration
   * Allows configuring specific ports for email handling
   * This overrides the default port mapping in the emailConfig
   */
  emailPortConfig?: {
    /** External to internal port mapping */
    portMapping?: Record<number, number>;
    /** Custom port configuration for specific ports */
    portSettings?: Record<number, any>;
    /** Path to store received emails */
    receivedEmailsPath?: string;
  };
  
  /** TLS/certificate configuration */
  tls?: {
    /** Contact email for ACME certificates */
    contactEmail: string;
    /** Domain for main certificate */
    domain?: string;
    /** Path to certificate file (if not using auto-provisioning) */
    certPath?: string;
    /** Path to key file (if not using auto-provisioning) */
    keyPath?: string;
    /** Path to CA certificate file (for custom CAs) */
    caPath?: string;
  };
  
  /**
   * The nameserver domains (e.g., ['ns1.example.com', 'ns2.example.com'])
   * These will automatically get A records pointing to publicIp or proxyIps[0]
   * These are what go in the NS records for ALL domains in dnsScopes
   */
  dnsNsDomains?: string[];
  
  /**
   * Domains this DNS server is authoritative for (e.g., ['example.com', 'mail.example.org'])
   * NS records will be auto-generated for these domains
   * Any DNS record outside these scopes will trigger a warning
   * Email domains with `internal-dns` mode must be included here
   */
  dnsScopes?: string[];
  
  /**
   * IPs of proxies that forward traffic to your server (optional)
   * When defined AND useIngressProxy is true, A records with server IP are replaced with proxy IPs
   * If not defined or empty, all A records use the real server IP
   * Helps hide real server IP for security/privacy
   */
  proxyIps?: string[];
  
  /**
   * Public IP address for nameserver A records (required if proxyIps not set)
   * This is the IP that will be used for the nameserver domains (dnsNsDomains)
   * If proxyIps is set, the first proxy IP will be used instead
   */
  publicIp?: string;
  
  /**
   * DNS records to register
   * Must be within the defined dnsScopes (or receive warning)
   * Only need A, CNAME, TXT, MX records (NS records auto-generated, SOA handled by smartdns)
   * Can use `useIngressProxy: false` to expose real server IP (defaults to true)
   */
  dnsRecords?: Array<{
    name: string;
    type: 'A' | 'AAAA' | 'CNAME' | 'MX' | 'TXT' | 'NS' | 'SOA';
    value: string;
    ttl?: number;
    useIngressProxy?: boolean;  // Whether to replace server IP with proxy IP (default: true)
  }>;
  
  /** DNS challenge configuration for ACME (optional) */
  dnsChallenge?: {
    /** Cloudflare API key for DNS challenges */
    cloudflareApiKey?: string;
    /** Other DNS providers can be added here */
  };
  
  /** Storage configuration */
  storage?: IStorageConfig;

  /**
   * Cache database configuration using smartdata and LocalTsmDb
   * Provides persistent caching for emails, IP reputation, bounces, etc.
   */
  cacheConfig?: {
    /** Enable cache database (default: true) */
    enabled?: boolean;
    /** Storage path for TsmDB data (default: ~/.serve.zone/dcrouter/tsmdb) */
    storagePath?: string;
    /** Database name (default: dcrouter) */
    dbName?: string;
    /** Default TTL in days for cached items (default: 30) */
    defaultTTLDays?: number;
    /** Cleanup interval in hours (default: 1) */
    cleanupIntervalHours?: number;
    /** TTL configuration per data type (in days) */
    ttlConfig?: {
      /** Email cache TTL (default: 30 days) */
      emails?: number;
      /** IP reputation cache TTL (default: 1 day) */
      ipReputation?: number;
      /** Bounce records TTL (default: 30 days) */
      bounces?: number;
      /** DKIM keys TTL (default: 90 days) */
      dkimKeys?: number;
      /** Suppression list TTL (default: 30 days, can be permanent) */
      suppression?: number;
    };
  };

  /**
   * RADIUS server configuration for network authentication
   * Enables MAC Authentication Bypass (MAB) and VLAN assignment
   */
  radiusConfig?: IRadiusServerConfig;
}

/**
 * DcRouter can be run on ingress and egress to and from a datacenter site.
 */
/**
 * Context passed to HTTP routing rules
 */
/**
 * Context passed to port proxy (SmartProxy) routing rules
 */
export interface PortProxyRuleContext {
  proxy: plugins.smartproxy.SmartProxy;
  routes: plugins.smartproxy.IRouteConfig[];
}

export class DcRouter {
  public options: IDcRouterOptions;

  // Core services
  public smartProxy?: plugins.smartproxy.SmartProxy;
  public smartAcme?: plugins.smartacme.SmartAcme;
  public dnsServer?: plugins.smartdns.dnsServerMod.DnsServer;
  public emailServer?: UnifiedEmailServer;
  public radiusServer?: RadiusServer;
  public storageManager: StorageManager;
  public opsServer: OpsServer;
  public metricsManager?: MetricsManager;

  // Cache system (smartdata + LocalTsmDb)
  public cacheDb?: CacheDb;
  public cacheCleaner?: CacheCleaner;

  // Certificate status tracking from SmartProxy events (keyed by domain)
  public certificateStatusMap = new Map<string, {
    status: 'valid' | 'failed';
    routeNames: string[];
    expiryDate?: string;
    issuedAt?: string;
    source?: string;
    error?: string;
  }>();

  // Certificate provisioning scheduler with per-domain backoff
  public certProvisionScheduler?: CertProvisionScheduler;

  // TypedRouter for API endpoints
  public typedrouter = new plugins.typedrequest.TypedRouter();

  // Environment access
  private qenv = new plugins.qenv.Qenv('./', '.nogit/');
  
  constructor(optionsArg: IDcRouterOptions) {
    // Set defaults in options
    this.options = {
      ...optionsArg
    };

    // Default storage to filesystem if not configured
    if (!this.options.storage) {
      this.options.storage = {
        fsPath: plugins.path.join(paths.dcrouterHomeDir, 'storage'),
      };
    }

    // Initialize storage manager
    this.storageManager = new StorageManager(this.options.storage);
  }

  public async start() {
    console.log('╔═══════════════════════════════════════════════════════════════════╗');
    console.log('║                     Starting DcRouter Services                    ║');
    console.log('╚═══════════════════════════════════════════════════════════════════╝');
    

    this.opsServer = new OpsServer(this);
    await this.opsServer.start();

    try {
      // Initialize cache database if enabled (default: enabled)
      if (this.options.cacheConfig?.enabled !== false) {
        await this.setupCacheDb();
      }

      // Initialize MetricsManager
      this.metricsManager = new MetricsManager(this);
      await this.metricsManager.start();
      
      // Set up SmartProxy for HTTP/HTTPS and all traffic including email routes
      await this.setupSmartProxy();
      
      // Set up unified email handling if configured
      if (this.options.emailConfig) {
        await this.setupUnifiedEmailHandling();
      }
      
      // Set up DNS server if configured with nameservers and scopes
      if (this.options.dnsNsDomains && this.options.dnsNsDomains.length > 0 &&
          this.options.dnsScopes && this.options.dnsScopes.length > 0) {
        await this.setupDnsWithSocketHandler();
      }

      // Set up RADIUS server if configured
      if (this.options.radiusConfig) {
        await this.setupRadiusServer();
      }

      this.logStartupSummary();
    } catch (error) {
      console.error('❌ Error starting DcRouter:', error);
      // Try to clean up any services that may have started
      await this.stop();
      throw error;
    }
  }
  
  /**
   * Log comprehensive startup summary
   */
  private logStartupSummary(): void {
    console.log('\n╔═══════════════════════════════════════════════════════════════════╗');
    console.log('║                    DcRouter Started Successfully                   ║');
    console.log('╚═══════════════════════════════════════════════════════════════════╝\n');
    
    // Metrics summary
    if (this.metricsManager) {
      console.log('📊 Metrics Service:');
      console.log('   ├─ SmartMetrics: Active');
      console.log('   ├─ SmartProxy Stats: Active');
      console.log('   └─ Real-time tracking: Enabled');
    }
    
    // SmartProxy summary
    if (this.smartProxy) {
      console.log('🌐 SmartProxy Service:');
      const routeCount = this.options.smartProxyConfig?.routes?.length || 0;
      console.log(`   ├─ Routes configured: ${routeCount}`);
      console.log(`   ├─ ACME enabled: ${this.options.smartProxyConfig?.acme?.enabled || false}`);
      if (this.options.smartProxyConfig?.acme?.enabled) {
        console.log(`   ├─ ACME email: ${this.options.smartProxyConfig.acme.email || 'not set'}`);
        console.log(`   └─ ACME mode: ${this.options.smartProxyConfig.acme.useProduction ? 'production' : 'staging'}`);
      } else {
        console.log('   └─ ACME: disabled');
      }
    }
    
    // Email service summary
    if (this.emailServer && this.options.emailConfig) {
      console.log('\n📧 Email Service:');
      const ports = this.options.emailConfig.ports || [];
      console.log(`   ├─ Ports: ${ports.join(', ')}`);
      console.log(`   ├─ Hostname: ${this.options.emailConfig.hostname || 'localhost'}`);
      console.log(`   ├─ Domains configured: ${this.options.emailConfig.domains?.length || 0}`);
      if (this.options.emailConfig.domains && this.options.emailConfig.domains.length > 0) {
        this.options.emailConfig.domains.forEach((domain, index) => {
          const isLast = index === this.options.emailConfig!.domains!.length - 1;
          console.log(`   ${isLast ? '└─' : '├─'} ${domain.domain} (${domain.dnsMode || 'default'})`);
        });
      }
      console.log(`   └─ DKIM: Initialized for all domains`);
    }
    
    // DNS service summary
    if (this.dnsServer && this.options.dnsNsDomains && this.options.dnsScopes) {
      console.log('\n🌍 DNS Service:');
      console.log(`   ├─ Nameservers: ${this.options.dnsNsDomains.join(', ')}`);
      console.log(`   ├─ Primary NS: ${this.options.dnsNsDomains[0]}`);
      console.log(`   ├─ Authoritative for: ${this.options.dnsScopes.length} domains`);
      console.log(`   ├─ UDP Port: 53`);
      console.log(`   ├─ DNS-over-HTTPS: Enabled via socket handler`);
      console.log(`   └─ DNSSEC: ${this.options.dnsNsDomains[0] ? 'Enabled' : 'Disabled'}`);
      
      // Show authoritative domains
      if (this.options.dnsScopes.length > 0) {
        console.log('\n   Authoritative Domains:');
        this.options.dnsScopes.forEach((domain, index) => {
          const isLast = index === this.options.dnsScopes!.length - 1;
          console.log(`   ${isLast ? '└─' : '├─'} ${domain}`);
        });
      }
    }
    
    // RADIUS service summary
    if (this.radiusServer && this.options.radiusConfig) {
      console.log('\n🔐 RADIUS Service:');
      console.log(`   ├─ Auth Port: ${this.options.radiusConfig.authPort || 1812}`);
      console.log(`   ├─ Acct Port: ${this.options.radiusConfig.acctPort || 1813}`);
      console.log(`   ├─ Clients configured: ${this.options.radiusConfig.clients?.length || 0}`);
      const vlanStats = this.radiusServer.getVlanManager().getStats();
      console.log(`   ├─ VLAN mappings: ${vlanStats.totalMappings}`);
      console.log(`   └─ Accounting: ${this.options.radiusConfig.accounting?.enabled ? 'Enabled' : 'Disabled'}`);
    }

    // Storage summary
    if (this.storageManager && this.options.storage) {
      console.log('\n💾 Storage:');
      console.log(`   └─ Path: ${this.options.storage.fsPath || 'default'}`);
    }

    // Cache database summary
    if (this.cacheDb) {
      console.log('\n🗄️  Cache Database (smartdata + LocalTsmDb):');
      console.log(`   ├─ Storage: ${this.cacheDb.getStoragePath()}`);
      console.log(`   ├─ Database: ${this.cacheDb.getDbName()}`);
      console.log(`   └─ Cleaner: ${this.cacheCleaner?.isActive() ? 'Active' : 'Inactive'} (${(this.options.cacheConfig?.cleanupIntervalHours || 1)}h interval)`);
    }

    console.log('\n✅ All services are running\n');
  }
  
  /**
   * Set up the cache database (smartdata + LocalTsmDb)
   */
  private async setupCacheDb(): Promise<void> {
    logger.log('info', 'Setting up CacheDb...');

    const cacheConfig = this.options.cacheConfig || {};

    // Initialize CacheDb singleton
    this.cacheDb = CacheDb.getInstance({
      storagePath: cacheConfig.storagePath || paths.defaultTsmDbPath,
      dbName: cacheConfig.dbName || 'dcrouter',
      debug: false,
    });

    await this.cacheDb.start();

    // Start the cache cleaner
    const cleanupIntervalMs = (cacheConfig.cleanupIntervalHours || 1) * 60 * 60 * 1000;
    this.cacheCleaner = new CacheCleaner(this.cacheDb, {
      intervalMs: cleanupIntervalMs,
      verbose: false,
    });
    this.cacheCleaner.start();

    logger.log('info', `CacheDb initialized at ${this.cacheDb.getStoragePath()}`);
  }

  /**
   * Set up SmartProxy with direct configuration and automatic email routes
   */
  private async setupSmartProxy(): Promise<void> {
    console.log('[DcRouter] Setting up SmartProxy...');
    let routes: plugins.smartproxy.IRouteConfig[] = [];
    let acmeConfig: plugins.smartproxy.IAcmeOptions | undefined;
    
    // If user provides full SmartProxy config, use it directly
    if (this.options.smartProxyConfig) {
      routes = this.options.smartProxyConfig.routes || [];
      acmeConfig = this.options.smartProxyConfig.acme;
      console.log(`[DcRouter] Found ${routes.length} routes in config`);
      console.log(`[DcRouter] ACME config present: ${!!acmeConfig}`);
    }
    
    // If email config exists, automatically add email routes
    if (this.options.emailConfig) {
      const emailRoutes = this.generateEmailRoutes(this.options.emailConfig);
      console.log(`Email Routes are:`)
      console.log(emailRoutes)
      routes = [...routes, ...emailRoutes]; // Enable email routing through SmartProxy
    }
    
    // If DNS is configured, add DNS routes
    if (this.options.dnsNsDomains && this.options.dnsNsDomains.length > 0) {
      const dnsRoutes = this.generateDnsRoutes();
      console.log(`DNS Routes for nameservers ${this.options.dnsNsDomains.join(', ')}:`, dnsRoutes);
      routes = [...routes, ...dnsRoutes];
    }
    
    // Merge TLS/ACME configuration if provided at root level
    if (this.options.tls && !acmeConfig) {
      acmeConfig = {
        accountEmail: this.options.tls.contactEmail,
        enabled: true,
        useProduction: true,
        autoRenew: true,
        renewThresholdDays: 30
      };
    }
    
    // Configure DNS challenge if available
    let challengeHandlers: any[] = [];
    if (this.options.dnsChallenge?.cloudflareApiKey) {
      console.log('Configuring Cloudflare DNS challenge for ACME');
      const cloudflareAccount = new plugins.cloudflare.CloudflareAccount(this.options.dnsChallenge.cloudflareApiKey);
      const dns01Handler = new plugins.smartacme.handlers.Dns01Handler(cloudflareAccount);
      challengeHandlers.push(dns01Handler);
    }
    
    // If we have routes or need a basic SmartProxy instance, create it
    if (routes.length > 0 || this.options.smartProxyConfig) {
      console.log('Setting up SmartProxy with combined configuration');
      
      // Create SmartProxy configuration
      const smartProxyConfig: plugins.smartproxy.ISmartProxyOptions = {
        ...this.options.smartProxyConfig,
        routes,
        acme: acmeConfig,
        certStore: {
          loadAll: async () => {
            const keys = await this.storageManager.list('/proxy-certs/');
            const certs: Array<{ domain: string; publicKey: string; privateKey: string; ca?: string }> = [];
            for (const key of keys) {
              const data = await this.storageManager.getJSON(key);
              if (data) certs.push(data);
            }
            return certs;
          },
          save: async (domain: string, publicKey: string, privateKey: string, ca?: string) => {
            await this.storageManager.setJSON(`/proxy-certs/${domain}`, {
              domain, publicKey, privateKey, ca,
            });
          },
          remove: async (domain: string) => {
            await this.storageManager.delete(`/proxy-certs/${domain}`);
          },
        },
      };
      
      // Initialize cert provision scheduler
      this.certProvisionScheduler = new CertProvisionScheduler(this.storageManager);

      // If we have DNS challenge handlers, create SmartAcme and wire to certProvisionFunction
      if (challengeHandlers.length > 0) {
        this.smartAcme = new plugins.smartacme.SmartAcme({
          accountEmail: acmeConfig?.accountEmail || this.options.tls?.contactEmail || 'admin@example.com',
          certManager: new StorageBackedCertManager(this.storageManager),
          environment: 'production',
          challengeHandlers: challengeHandlers,
          challengePriority: ['dns-01'],
        });
        await this.smartAcme.start();

        const scheduler = this.certProvisionScheduler;
        smartProxyConfig.certProvisionFunction = async (domain, eventComms) => {
          // Check backoff before attempting provision
          if (await scheduler.isInBackoff(domain)) {
            const info = await scheduler.getBackoffInfo(domain);
            const msg = `Domain ${domain} is in backoff (${info?.failures} failures), retry after ${info?.retryAfter}`;
            eventComms.warn(msg);
            throw new Error(msg);
          }

          try {
            // smartacme v9 handles concurrency, per-domain dedup, and rate limiting internally
            eventComms.log(`Attempting DNS-01 via SmartAcme for ${domain}`);
            eventComms.setSource('smartacme-dns-01');
            const cert = await this.smartAcme.getCertificateForDomain(domain);
            if (cert.validUntil) {
              eventComms.setExpiryDate(new Date(cert.validUntil));
            }
            const result = {
              id: cert.id,
              domainName: cert.domainName,
              created: cert.created,
              validUntil: cert.validUntil,
              privateKey: cert.privateKey,
              publicKey: cert.publicKey,
              csr: cert.csr,
            };

            // Success — clear any backoff
            await scheduler.clearBackoff(domain);
            return result;
          } catch (err) {
            // Record failure for backoff tracking
            await scheduler.recordFailure(domain, err.message);
            eventComms.warn(`SmartAcme DNS-01 failed for ${domain}: ${err.message}, falling back to http-01`);
            return 'http01';
          }
        };
      }
      
      // Create SmartProxy instance
      console.log('[DcRouter] Creating SmartProxy instance with config:', JSON.stringify({
        routeCount: smartProxyConfig.routes?.length,
        acmeEnabled: smartProxyConfig.acme?.enabled,
        acmeEmail: smartProxyConfig.acme?.email,
        certProvisionFunction: !!smartProxyConfig.certProvisionFunction
      }, null, 2));
      
      this.smartProxy = new plugins.smartproxy.SmartProxy(smartProxyConfig);
      
      // Set up event listeners
      this.smartProxy.on('error', (err) => {
        console.error('[DcRouter] SmartProxy error:', err);
        console.error('[DcRouter] Error stack:', err.stack);
      });
      
      // Always listen for certificate events — emitted by both ACME and certProvisionFunction paths
      // Events are keyed by domain for domain-centric certificate tracking
      this.smartProxy.on('certificate-issued', (event: plugins.smartproxy.ICertificateIssuedEvent) => {
        console.log(`[DcRouter] Certificate issued for ${event.domain} via ${event.source}, expires ${event.expiryDate}`);
        const routeNames = this.findRouteNamesForDomain(event.domain);
        this.certificateStatusMap.set(event.domain, {
          status: 'valid', routeNames,
          expiryDate: event.expiryDate, issuedAt: new Date().toISOString(),
          source: event.source,
        });
      });

      this.smartProxy.on('certificate-renewed', (event: plugins.smartproxy.ICertificateIssuedEvent) => {
        console.log(`[DcRouter] Certificate renewed for ${event.domain} via ${event.source}, expires ${event.expiryDate}`);
        const routeNames = this.findRouteNamesForDomain(event.domain);
        this.certificateStatusMap.set(event.domain, {
          status: 'valid', routeNames,
          expiryDate: event.expiryDate, issuedAt: new Date().toISOString(),
          source: event.source,
        });
      });

      this.smartProxy.on('certificate-failed', (event: plugins.smartproxy.ICertificateFailedEvent) => {
        console.error(`[DcRouter] Certificate failed for ${event.domain} (${event.source}):`, event.error);
        const routeNames = this.findRouteNamesForDomain(event.domain);
        this.certificateStatusMap.set(event.domain, {
          status: 'failed', routeNames, error: event.error,
          source: event.source,
        });
      });
      
      // Start SmartProxy
      console.log('[DcRouter] Starting SmartProxy...');
      await this.smartProxy.start();
      console.log('[DcRouter] SmartProxy started successfully');
      
      console.log(`SmartProxy started with ${routes.length} routes`);
    }
  }
  
  

  /**
   * Generate SmartProxy routes for email configuration
   */
  private generateEmailRoutes(emailConfig: IUnifiedEmailServerOptions): plugins.smartproxy.IRouteConfig[] {
    const emailRoutes: plugins.smartproxy.IRouteConfig[] = [];
    
    // Create routes for each email port
    for (const port of emailConfig.ports) {
      // Create a descriptive name for the route based on the port
      let routeName = 'email-route';
      let tlsMode = 'passthrough';
      
      // Handle different email ports differently
      switch (port) {
        case 25: // SMTP
          routeName = 'smtp-route';
          tlsMode = 'passthrough'; // STARTTLS handled by email server
          break;
          
        case 587: // Submission
          routeName = 'submission-route';
          tlsMode = 'passthrough'; // STARTTLS handled by email server
          break;
          
        case 465: // SMTPS
          routeName = 'smtps-route';
          tlsMode = 'terminate'; // Terminate TLS and re-encrypt to email server
          break;
          
        default:
          routeName = `email-port-${port}-route`;
          tlsMode = 'passthrough';
          
          // Check if we have specific settings for this port
          if (this.options.emailPortConfig?.portSettings && 
              this.options.emailPortConfig.portSettings[port]) {
            const portSettings = this.options.emailPortConfig.portSettings[port];
            
            // If this port requires TLS termination, set the mode accordingly
            if (portSettings.terminateTls) {
              tlsMode = 'terminate';
            }
            
            // Override the route name if specified
            if (portSettings.routeName) {
              routeName = portSettings.routeName;
            }
          }
          break;
      }
      
      // Create forward action to route to internal email server ports
      const defaultPortMapping: Record<number, number> = {
        25: 10025,   // SMTP
        587: 10587,  // Submission
        465: 10465   // SMTPS
      };

      const portMapping = this.options.emailPortConfig?.portMapping || defaultPortMapping;
      const internalPort = portMapping[port] || port + 10000;

      let action: any = {
        type: 'forward',
        targets: [{
          host: 'localhost', // Forward to internal email server
          port: internalPort
        }],
        tls: {
          mode: tlsMode as any
        }
      };
      
      // For TLS terminate mode, add certificate info
      if (tlsMode === 'terminate' && action.tls) {
        action.tls.certificate = 'auto';
      }
      
      // Create the route configuration
      const routeConfig: plugins.smartproxy.IRouteConfig = {
        name: routeName,
        match: {
          ports: [port]
        },
        action: action
      };
      
      // Add the route to our list
      emailRoutes.push(routeConfig);
    }
    
    return emailRoutes;
  }
  
  /**
   * Generate SmartProxy routes for DNS configuration
   */
  private generateDnsRoutes(): plugins.smartproxy.IRouteConfig[] {
    if (!this.options.dnsNsDomains || this.options.dnsNsDomains.length === 0) {
      return [];
    }
    
    const dnsRoutes: plugins.smartproxy.IRouteConfig[] = [];
    
    // Create routes for DNS-over-HTTPS paths
    const dohPaths = ['/dns-query', '/resolve'];
    
    // Use the first nameserver domain for DoH routes
    const primaryNameserver = this.options.dnsNsDomains[0];
    
    for (const path of dohPaths) {
      const dohRoute: plugins.smartproxy.IRouteConfig = {
        name: `dns-over-https-${path.replace('/', '')}`,
        match: {
          ports: [443], // HTTPS port for DoH
          domains: [primaryNameserver],
          path: path
        },
        action: {
          type: 'socket-handler' as any,
          socketHandler: this.createDnsSocketHandler()
        } as any
      };
      
      dnsRoutes.push(dohRoute);
    }
    
    return dnsRoutes;
  }

  /**
   * Check if a domain matches a pattern (including wildcard support)
   * @param domain The domain to check
   * @param pattern The pattern to match against (e.g., "*.example.com")
   * @returns Whether the domain matches the pattern
   */
  private isDomainMatch(domain: string, pattern: string): boolean {
    domain = domain.toLowerCase();
    pattern = pattern.toLowerCase();

    if (domain === pattern) return true;

    // Routing-glob: *example.com matches example.com, sub.example.com, *.example.com
    if (pattern.startsWith('*') && !pattern.startsWith('*.')) {
      const baseDomain = pattern.slice(1); // *nevermind.cloud → nevermind.cloud
      if (domain === baseDomain || domain === `*.${baseDomain}`) return true;
      if (domain.endsWith(baseDomain) && domain.length > baseDomain.length) return true;
    }

    // Standard wildcard: *.example.com matches sub.example.com and example.com
    if (pattern.startsWith('*.')) {
      const suffix = pattern.slice(2);
      if (domain === suffix) return true;
      return domain.endsWith(suffix) && domain.length > suffix.length;
    }

    return false;
  }

  /**
   * Find the first route name that matches a given domain
   */
  private findRouteNameForDomain(domain: string): string | undefined {
    if (!this.smartProxy) return undefined;
    for (const route of this.smartProxy.routeManager.getRoutes()) {
      if (!route.match.domains || !route.name) continue;
      const routeDomains = Array.isArray(route.match.domains)
        ? route.match.domains
        : [route.match.domains];
      for (const pattern of routeDomains) {
        if (this.isDomainMatch(domain, pattern)) return route.name;
      }
    }
    return undefined;
  }

  /**
   * Find ALL route names that match a given domain
   */
  public findRouteNamesForDomain(domain: string): string[] {
    if (!this.smartProxy) return [];
    const names: string[] = [];
    for (const route of this.smartProxy.routeManager.getRoutes()) {
      if (!route.match.domains || !route.name) continue;
      const routeDomains = Array.isArray(route.match.domains)
        ? route.match.domains
        : [route.match.domains];
      for (const pattern of routeDomains) {
        if (this.isDomainMatch(domain, pattern)) {
          names.push(route.name);
          break; // This route already matched, no need to check other patterns
        }
      }
    }
    return names;
  }

  public async stop() {
    console.log('Stopping DcRouter services...');

    await this.opsServer.stop();

    try {
      // Stop all services in parallel for faster shutdown
      await Promise.all([
        // Stop cache cleaner if running
        this.cacheCleaner ? Promise.resolve(this.cacheCleaner.stop()) : Promise.resolve(),

        // Stop metrics manager if running
        this.metricsManager ? this.metricsManager.stop().catch(err => console.error('Error stopping MetricsManager:', err)) : Promise.resolve(),

        // Stop unified email server if running
        this.emailServer ? this.emailServer.stop().catch(err => console.error('Error stopping email server:', err)) : Promise.resolve(),

        // Stop SmartAcme if running
        this.smartAcme ? this.smartAcme.stop().catch(err => console.error('Error stopping SmartAcme:', err)) : Promise.resolve(),

        // Stop HTTP SmartProxy if running
        this.smartProxy ? this.smartProxy.stop().catch(err => console.error('Error stopping SmartProxy:', err)) : Promise.resolve(),

        // Stop DNS server if running
        this.dnsServer ?
          this.dnsServer.stop().catch(err => console.error('Error stopping DNS server:', err)) :
          Promise.resolve(),

        // Stop RADIUS server if running
        this.radiusServer ?
          this.radiusServer.stop().catch(err => console.error('Error stopping RADIUS server:', err)) :
          Promise.resolve()
      ]);

      // Stop cache database after other services (they may need it during shutdown)
      if (this.cacheDb) {
        await this.cacheDb.stop().catch(err => console.error('Error stopping CacheDb:', err));
      }

      console.log('All DcRouter services stopped');
    } catch (error) {
      console.error('Error during DcRouter shutdown:', error);
      throw error;
    }
  }

  /**
   * Update SmartProxy configuration
   * @param config New SmartProxy configuration
   */
  public async updateSmartProxyConfig(config: plugins.smartproxy.ISmartProxyOptions): Promise<void> {
    // Stop existing SmartProxy if running
    if (this.smartProxy) {
      await this.smartProxy.stop();
      this.smartProxy = undefined;
    }
    
    // Update configuration
    this.options.smartProxyConfig = config;
    
    // Start new SmartProxy with updated configuration (will include email routes if configured)
    await this.setupSmartProxy();
    
    console.log('SmartProxy configuration updated');
  }
  
  
  
  /**
   * Set up unified email handling with pattern-based routing
   * This implements the consolidated emailConfig approach
   */
  private async setupUnifiedEmailHandling(): Promise<void> {
    if (!this.options.emailConfig) {
      throw new Error('Email configuration is required for unified email handling');
    }

    // Apply port mapping if behind SmartProxy
    const portMapping = this.options.emailPortConfig?.portMapping || {
      25: 10025,   // SMTP
      587: 10587,  // Submission
      465: 10465   // SMTPS
    };
    
    // Transform domains if they are provided as strings
    let transformedDomains = this.options.emailConfig.domains;
    if (transformedDomains && transformedDomains.length > 0) {
      // Check if domains are strings (for backward compatibility)
      if (typeof transformedDomains[0] === 'string') {
        transformedDomains = (transformedDomains as any).map((domain: string) => ({
          domain,
          dnsMode: 'external-dns' as const,
          dkim: {
            selector: 'default',
            keySize: 2048,
            rotateKeys: false,
            rotationInterval: 90
          }
        }));
      }
    }
    
    // Create config with mapped ports
    const emailConfig: IUnifiedEmailServerOptions = {
      ...this.options.emailConfig,
      domains: transformedDomains,
      ports: this.options.emailConfig.ports.map(port => portMapping[port] || port + 10000),
      hostname: 'localhost' // Listen on localhost for SmartProxy forwarding
    };
    
    // Create unified email server
    this.emailServer = new UnifiedEmailServer(this, emailConfig);
    
    // Set up error handling
    this.emailServer.on('error', (err: Error) => {
      logger.log('error', `UnifiedEmailServer error: ${err.message}`);
    });
    
    // Start the server
    await this.emailServer.start();
    
    logger.log('info', `Email server started on ports: ${emailConfig.ports.join(', ')}`);
  }
  
  /**
   * Update the unified email configuration
   * @param config New email configuration
   */
  public async updateEmailConfig(config: IUnifiedEmailServerOptions): Promise<void> {
    // Stop existing email components
    await this.stopUnifiedEmailComponents();
    
    // Update configuration
    this.options.emailConfig = config;
    
    // Start email handling with new configuration
    await this.setupUnifiedEmailHandling();
    
    console.log('Unified email configuration updated');
  }
  
  /**
   * Stop all unified email components
   */
  private async stopUnifiedEmailComponents(): Promise<void> {
    try {
      // Stop the unified email server which contains all components
      if (this.emailServer) {
        await this.emailServer.stop();
        logger.log('info', 'Unified email server stopped');
        this.emailServer = undefined;
      }
      
      logger.log('info', 'All unified email components stopped');
    } catch (error) {
      logger.log('error', `Error stopping unified email components: ${error.message}`);
      throw error;
    }
  }
  
  /**
   * Update domain rules for email routing
   * @param rules New domain rules to apply
   */
  public async updateEmailRoutes(routes: IEmailRoute[]): Promise<void> {
    // Validate that email config exists
    if (!this.options.emailConfig) {
      throw new Error('Email configuration is required before updating routes');
    }
    
    // Update the configuration
    this.options.emailConfig.routes = routes;
    
    // Update the unified email server if it exists
    if (this.emailServer) {
      this.emailServer.updateEmailRoutes(routes);
    }
    
    console.log(`Email routes updated with ${routes.length} routes`);
  }
  
  /**
   * Get statistics from all components
   */
  public getStats(): any {
    const stats: any = {
      emailServer: this.emailServer?.getStats()
    };
    
    return stats;
  }
  
  /**
   * Register DNS records with the DNS server
   * @param records Array of DNS records to register
   */
  private registerDnsRecords(records: Array<{name: string; type: string; value: string; ttl?: number}>): void {
    if (!this.dnsServer) return;
    
    // Register a separate handler for each record
    // This ensures multiple records of the same type (like NS records) are all served
    for (const record of records) {
      // Register handler for this specific record
      this.dnsServer.registerHandler(record.name, [record.type], (question) => {
        // Check if this handler matches the question
        if (question.name === record.name && question.type === record.type) {
          return {
            name: record.name,
            type: record.type,
            class: 'IN',
            ttl: record.ttl || 300,
            data: this.parseDnsRecordData(record.type, record.value)
          };
        }
        
        return null;
      });
    }
    
    logger.log('info', `Registered ${records.length} DNS handlers (one per record)`);
  }
  
  /**
   * Parse DNS record data based on record type
   * @param type DNS record type
   * @param value DNS record value
   * @returns Parsed data for the DNS response
   */
  private parseDnsRecordData(type: string, value: string): any {
    switch (type) {
      case 'A':
        return value; // IP address as string
      case 'MX':
        const [priority, exchange] = value.split(' ');
        return { priority: parseInt(priority), exchange };
      case 'TXT':
        return value;
      case 'NS':
        return value;
      case 'SOA':
        // SOA format: primary-ns admin-email serial refresh retry expire minimum
        const parts = value.split(' ');
        return {
          mname: parts[0],
          rname: parts[1],
          serial: parseInt(parts[2]),
          refresh: parseInt(parts[3]),
          retry: parseInt(parts[4]),
          expire: parseInt(parts[5]),
          minimum: parseInt(parts[6])
        };
      default:
        return value;
    }
  }
  
  /**
   * Set up DNS server with socket handler for DoH
   */
  private async setupDnsWithSocketHandler(): Promise<void> {
    if (!this.options.dnsNsDomains || this.options.dnsNsDomains.length === 0) {
      throw new Error('dnsNsDomains is required for DNS server setup');
    }
    
    if (!this.options.dnsScopes || this.options.dnsScopes.length === 0) {
      throw new Error('dnsScopes is required for DNS server setup');
    }
    
    const primaryNameserver = this.options.dnsNsDomains[0];
    logger.log('info', `Setting up DNS server with primary nameserver: ${primaryNameserver}`);
    
    // Get VM IP address for UDP binding
    const networkInterfaces = plugins.os.networkInterfaces();
    let vmIpAddress = '0.0.0.0'; // Default to all interfaces
    
    // Try to find the VM's internal IP address
    for (const [_name, interfaces] of Object.entries(networkInterfaces)) {
      if (interfaces) {
        for (const iface of interfaces) {
          if (!iface.internal && iface.family === 'IPv4') {
            vmIpAddress = iface.address;
            break;
          }
        }
      }
    }
    
    // Create DNS server instance with manual HTTPS mode
    this.dnsServer = new plugins.smartdns.dnsServerMod.DnsServer({
      udpPort: 53,
      udpBindInterface: vmIpAddress,
      httpsPort: 443, // Required but won't bind due to manual mode
      manualHttpsMode: true, // Enable manual HTTPS socket handling
      dnssecZone: primaryNameserver,
      primaryNameserver: primaryNameserver, // Automatically generates correct SOA records
      // For now, use self-signed cert until we integrate with Let's Encrypt
      httpsKey: '',
      httpsCert: ''
    });
    
    // Start the DNS server (UDP only)
    await this.dnsServer.start();
    logger.log('info', `DNS server started on UDP ${vmIpAddress}:53`);
    
    // Validate DNS configuration
    await this.validateDnsConfiguration();
    
    // Generate and register authoritative records
    const authoritativeRecords = await this.generateAuthoritativeRecords();
    
    // Generate email DNS records
    const emailDnsRecords = await this.generateEmailDnsRecords();
    
    // Initialize DKIM for all email domains
    await this.initializeDkimForEmailDomains();
    
    // Load DKIM records from JSON files (they should now exist)
    const dkimRecords = await this.loadDkimRecords();
    
    // Combine all records: authoritative, email, DKIM, and user-defined
    const allRecords = [...authoritativeRecords, ...emailDnsRecords, ...dkimRecords];
    if (this.options.dnsRecords && this.options.dnsRecords.length > 0) {
      allRecords.push(...this.options.dnsRecords);
    }
    
    // Apply proxy IP replacement if configured
    await this.applyProxyIpReplacement(allRecords);
    
    // Register all DNS records
    if (allRecords.length > 0) {
      this.registerDnsRecords(allRecords);
      logger.log('info', `Registered ${allRecords.length} DNS records (${authoritativeRecords.length} authoritative, ${emailDnsRecords.length} email, ${dkimRecords.length} DKIM, ${this.options.dnsRecords?.length || 0} user-defined)`);
    }
  }
  
  /**
   * Create DNS socket handler for DoH
   */
  private createDnsSocketHandler(): (socket: plugins.net.Socket) => Promise<void> {
    return async (socket: plugins.net.Socket) => {
      if (!this.dnsServer) {
        logger.log('error', 'DNS socket handler called but DNS server not initialized');
        socket.end();
        return;
      }
      
      logger.log('debug', 'DNS socket handler: passing socket to DnsServer');
      
      try {
        // Use the built-in socket handler from smartdns
        // This handles HTTP/2, DoH protocol, etc.
        await (this.dnsServer as any).handleHttpsSocket(socket);
      } catch (error) {
        logger.log('error', `DNS socket handler error: ${error.message}`);
        socket.destroy();
      }
    };
  }
  
  /**
   * Validate DNS configuration
   */
  private async validateDnsConfiguration(): Promise<void> {
    if (!this.options.dnsNsDomains || !this.options.dnsScopes) {
      return;
    }
    
    logger.log('info', 'Validating DNS configuration...');
    
    // Check if email domains with internal-dns are in dnsScopes
    if (this.options.emailConfig?.domains) {
      for (const domainConfig of this.options.emailConfig.domains) {
        if (domainConfig.dnsMode === 'internal-dns' && 
            !this.options.dnsScopes.includes(domainConfig.domain)) {
          logger.log('warn', `Email domain '${domainConfig.domain}' with internal-dns mode is not in dnsScopes. It should be added to dnsScopes.`);
        }
      }
    }
    
    // Validate user-provided DNS records are within scopes
    if (this.options.dnsRecords) {
      for (const record of this.options.dnsRecords) {
        const recordDomain = this.extractDomain(record.name);
        const isInScope = this.options.dnsScopes.some(scope => 
          recordDomain === scope || recordDomain.endsWith(`.${scope}`)
        );
        
        if (!isInScope) {
          logger.log('warn', `DNS record for '${record.name}' is outside defined scopes [${this.options.dnsScopes.join(', ')}]`);
        }
      }
    }
  }
  
  /**
   * Generate email DNS records for domains with internal-dns mode
   */
  private async generateEmailDnsRecords(): Promise<Array<{name: string; type: string; value: string; ttl?: number}>> {
    const records: Array<{name: string; type: string; value: string; ttl?: number}> = [];
    
    if (!this.options.emailConfig?.domains) {
      return records;
    }
    
    // Filter domains with internal-dns mode
    const internalDnsDomains = this.options.emailConfig.domains.filter(
      domain => domain.dnsMode === 'internal-dns'
    );
    
    for (const domainConfig of internalDnsDomains) {
      const domain = domainConfig.domain;
      const ttl = domainConfig.dns?.internal?.ttl || 3600;
      const mxPriority = domainConfig.dns?.internal?.mxPriority || 10;
      
      // MX record - points to the domain itself for email handling
      records.push({
        name: domain,
        type: 'MX',
        value: `${mxPriority} ${domain}`,
        ttl
      });
      
      // SPF record - using sensible defaults
      const spfRecord = 'v=spf1 a mx ~all';
      records.push({
        name: domain,
        type: 'TXT',
        value: spfRecord,
        ttl
      });
      
      // DMARC record - using sensible defaults
      const dmarcPolicy = 'none'; // Start with 'none' policy for monitoring
      const dmarcEmail = `dmarc@${domain}`;
      records.push({
        name: `_dmarc.${domain}`,
        type: 'TXT',
        value: `v=DMARC1; p=${dmarcPolicy}; rua=mailto:${dmarcEmail}`,
        ttl
      });
      
      // Note: DKIM records will be generated later when DKIM keys are available
      // They require the DKIMCreator which is part of the email server
    }
    
    logger.log('info', `Generated ${records.length} email DNS records for ${internalDnsDomains.length} internal-dns domains`);
    return records;
  }
  
  /**
   * Load DKIM records from JSON files
   * Reads all *.dkimrecord.json files from the DNS records directory
   */
  private async loadDkimRecords(): Promise<Array<{name: string; type: string; value: string; ttl?: number}>> {
    const records: Array<{name: string; type: string; value: string; ttl?: number}> = [];
    
    try {
      // Ensure paths are imported
      const dnsDir = paths.dnsRecordsDir;
      
      // Check if directory exists
      if (!plugins.fs.existsSync(dnsDir)) {
        logger.log('debug', 'No DNS records directory found, skipping DKIM record loading');
        return records;
      }
      
      // Read all files in the directory
      const files = plugins.fs.readdirSync(dnsDir);
      const dkimFiles = files.filter(f => f.endsWith('.dkimrecord.json'));
      
      logger.log('info', `Found ${dkimFiles.length} DKIM record files`);
      
      // Load each DKIM record
      for (const file of dkimFiles) {
        try {
          const filePath = plugins.path.join(dnsDir, file);
          const fileContent = plugins.fs.readFileSync(filePath, 'utf8');
          const dkimRecord = JSON.parse(fileContent);
          
          // Validate record structure
          if (dkimRecord.name && dkimRecord.type === 'TXT' && dkimRecord.value) {
            records.push({
              name: dkimRecord.name,
              type: 'TXT',
              value: dkimRecord.value,
              ttl: 3600 // Standard DKIM TTL
            });
            
            logger.log('info', `Loaded DKIM record for ${dkimRecord.name}`);
          } else {
            logger.log('warn', `Invalid DKIM record structure in ${file}`);
          }
        } catch (error) {
          logger.log('error', `Failed to load DKIM record from ${file}: ${error.message}`);
        }
      }
    } catch (error) {
      logger.log('error', `Failed to load DKIM records: ${error.message}`);
    }
    
    return records;
  }
  
  /**
   * Initialize DKIM keys for all configured email domains
   * This ensures DKIM records are available immediately at startup
   */
  private async initializeDkimForEmailDomains(): Promise<void> {
    if (!this.options.emailConfig?.domains || !this.emailServer) {
      return;
    }
    
    logger.log('info', 'Initializing DKIM keys for email domains...');
    
    // Get DKIMCreator instance from email server (public in smartmta)
    const dkimCreator = this.emailServer.dkimCreator;
    if (!dkimCreator) {
      logger.log('warn', 'DKIMCreator not available, skipping DKIM initialization');
      return;
    }
    
    // Ensure necessary directories exist
    paths.ensureDirectories();
    
    // Generate DKIM keys for each email domain
    for (const domainConfig of this.options.emailConfig.domains) {
      try {
        // Generate DKIM keys for all domains, regardless of DNS mode
        // This ensures keys are ready even if DNS mode changes later
        await dkimCreator.handleDKIMKeysForDomain(domainConfig.domain);
        logger.log('info', `DKIM keys initialized for ${domainConfig.domain}`);
      } catch (error) {
        logger.log('error', `Failed to initialize DKIM for ${domainConfig.domain}: ${error.message}`);
      }
    }
    
    logger.log('info', 'DKIM initialization complete');
  }
  
  /**
   * Generate authoritative DNS records (NS only) for all domains in dnsScopes
   * SOA records are now automatically generated by smartdns with primaryNameserver setting
   */
  private async generateAuthoritativeRecords(): Promise<Array<{name: string; type: string; value: string; ttl?: number}>> {
    const records: Array<{name: string; type: string; value: string; ttl?: number}> = [];
    
    if (!this.options.dnsNsDomains || !this.options.dnsScopes) {
      return records;
    }
    
    // Determine the public IP for nameserver A records
    let publicIp: string | null = null;
    
    // Use proxy IPs if configured (these should be public IPs)
    if (this.options.proxyIps && this.options.proxyIps.length > 0) {
      publicIp = this.options.proxyIps[0]; // Use first proxy IP
      logger.log('info', `Using proxy IP for nameserver A records: ${publicIp}`);
    } else if (this.options.publicIp) {
      // Use explicitly configured public IP
      publicIp = this.options.publicIp;
      logger.log('info', `Using configured public IP for nameserver A records: ${publicIp}`);
    } else {
      // Auto-discover public IP using smartnetwork
      try {
        logger.log('info', 'Auto-discovering public IP address...');
        const smartNetwork = new plugins.smartnetwork.SmartNetwork();
        const publicIps = await smartNetwork.getPublicIps();
        
        if (publicIps.v4) {
          publicIp = publicIps.v4;
          logger.log('info', `Auto-discovered public IPv4: ${publicIp}`);
        } else {
          logger.log('warn', 'Could not auto-discover public IPv4 address');
        }
      } catch (error) {
        logger.log('error', `Failed to auto-discover public IP: ${error.message}`);
      }
      
      if (!publicIp) {
        logger.log('warn', 'No public IP available. Nameserver A records require either proxyIps, publicIp, or successful auto-discovery.');
      }
    }
    
    // Generate A records for nameservers if we have a public IP
    if (publicIp) {
      for (const nsDomain of this.options.dnsNsDomains) {
        records.push({
          name: nsDomain,
          type: 'A',
          value: publicIp,
          ttl: 3600
        });
      }
      logger.log('info', `Generated A records for ${this.options.dnsNsDomains.length} nameservers`);
    }
    
    // Generate NS records for each domain in scopes
    for (const domain of this.options.dnsScopes) {
      // Add NS records for all nameservers
      for (const nsDomain of this.options.dnsNsDomains) {
        records.push({
          name: domain,
          type: 'NS',
          value: nsDomain,
          ttl: 3600
        });
      }
      
      // SOA records are now automatically generated by smartdns DnsServer
      // with the primaryNameserver configuration option
    }
    
    logger.log('info', `Generated ${records.length} total records (A + NS) for ${this.options.dnsScopes.length} domains`);
    return records;
  }
  
  /**
   * Extract the base domain from a DNS record name
   */
  private extractDomain(recordName: string): string {
    // Handle wildcards
    if (recordName.startsWith('*.')) {
      recordName = recordName.substring(2);
    }
    return recordName;
  }
  
  /**
   * Apply proxy IP replacement logic to DNS records
   */
  private async applyProxyIpReplacement(records: Array<{name: string; type: string; value: string; ttl?: number; useIngressProxy?: boolean}>): Promise<void> {
    if (!this.options.proxyIps || this.options.proxyIps.length === 0) {
      return; // No proxy IPs configured, skip replacement
    }
    
    // Get server's public IP
    const serverIp = await this.detectServerPublicIp();
    if (!serverIp) {
      logger.log('warn', 'Could not detect server public IP, skipping proxy IP replacement');
      return;
    }
    
    logger.log('info', `Applying proxy IP replacement. Server IP: ${serverIp}, Proxy IPs: ${this.options.proxyIps.join(', ')}`);
    
    let proxyIndex = 0;
    for (const record of records) {
      if (record.type === 'A' && 
          record.value === serverIp && 
          record.useIngressProxy !== false) {
        // Round-robin through proxy IPs
        const proxyIp = this.options.proxyIps[proxyIndex % this.options.proxyIps.length];
        logger.log('info', `Replacing A record for ${record.name}: ${record.value} → ${proxyIp}`);
        record.value = proxyIp;
        proxyIndex++;
      }
    }
  }
  
  /**
   * Detect the server's public IP address
   */
  private async detectServerPublicIp(): Promise<string | null> {
    try {
      const smartNetwork = new plugins.smartnetwork.SmartNetwork();
      const publicIps = await smartNetwork.getPublicIps();
      
      if (publicIps.v4) {
        return publicIps.v4;
      }
      
      return null;
    } catch (error) {
      logger.log('warn', `Failed to detect public IP: ${error.message}`);
      return null;
    }
  }
  
  /**
   * Set up RADIUS server for network authentication
   */
  private async setupRadiusServer(): Promise<void> {
    if (!this.options.radiusConfig) {
      return;
    }

    logger.log('info', 'Setting up RADIUS server...');

    this.radiusServer = new RadiusServer(this.options.radiusConfig, this.storageManager);
    await this.radiusServer.start();

    logger.log('info', `RADIUS server started on ports ${this.options.radiusConfig.authPort || 1812} (auth) and ${this.options.radiusConfig.acctPort || 1813} (acct)`);
  }

  /**
   * Update RADIUS configuration at runtime
   */
  public async updateRadiusConfig(config: IRadiusServerConfig): Promise<void> {
    // Stop existing RADIUS server if running
    if (this.radiusServer) {
      await this.radiusServer.stop();
      this.radiusServer = undefined;
    }

    // Update configuration
    this.options.radiusConfig = config;

    // Start with new configuration
    await this.setupRadiusServer();

    logger.log('info', 'RADIUS configuration updated');
  }
}

// Re-export email server types for convenience
export type { IUnifiedEmailServerOptions };

// Re-export RADIUS types for convenience
export type { IRadiusServerConfig };

export default DcRouter;