dcrouter/ts/classes.dcrouter.ts

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
import { UnifiedEmailServer, type IUnifiedEmailServerOptions } from './mail/routing/classes.unified.email.server.js';
import type { IEmailRoute } from './mail/routing/interfaces.js';
import { logger } from './logger.js';
// Import the email configuration helpers directly from mail/delivery
import { configureEmailStorage, configureEmailServer } from './mail/delivery/index.js';
// Import storage manager
import { StorageManager, type IStorageConfig } from './storage/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;
  };
  
  /** 
   * DNS domain for automatic DNS server setup with DoH
   * When set, DNS server will:
   * - Always bind to UDP port 53 on the VM's IP address
   * - Use socket-handler approach for DNS-over-HTTPS
   * - Automatically handle NS delegation validation
   */
  dnsDomain?: string;
  
  /**
   * DNS records to register when using dnsDomain
   * These are in addition to auto-generated records from email domains with internal-dns mode
   */
  dnsRecords?: Array<{
    name: string;
    type: 'A' | 'AAAA' | 'CNAME' | 'MX' | 'TXT' | 'NS' | 'SOA';
    value: string;
    ttl?: number;
  }>;
  
  /** 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;
}

/**
 * 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 dnsServer?: plugins.smartdns.dnsServerMod.DnsServer;
  public emailServer?: UnifiedEmailServer;
  public storageManager: StorageManager;
  
  
  // Environment access 
  private qenv = new plugins.qenv.Qenv('./', '.nogit/');
  
  constructor(optionsArg: IDcRouterOptions) {
    // Set defaults in options
    this.options = {
      ...optionsArg
    };
    
    // Initialize storage manager
    this.storageManager = new StorageManager(this.options.storage);
  }

  public async start() {
    console.log('Starting DcRouter services...');
    
    try {
      // 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();
        
        // Apply custom email storage configuration if available
        if (this.emailServer && this.options.emailPortConfig?.receivedEmailsPath) {
          logger.log('info', 'Applying custom email storage configuration');
          configureEmailStorage(this.emailServer, this.options);
        }
      }
      
      // Set up DNS server if configured by dnsDomain
      if (this.options.dnsDomain) {
        await this.setupDnsWithSocketHandler();
      }
      
      console.log('DcRouter started successfully');
    } catch (error) {
      console.error('Error starting DcRouter:', error);
      // Try to clean up any services that may have started
      await this.stop();
      throw error;
    }
  }
  
  /**
   * 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 domain is configured, add DNS routes
    if (this.options.dnsDomain) {
      const dnsRoutes = this.generateDnsRoutes();
      console.log(`DNS Routes for domain ${this.options.dnsDomain}:`, 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
      };
      
      // If we have DNS challenge handlers, enhance the config
      if (challengeHandlers.length > 0) {
        // We'll need to pass this to SmartProxy somehow
        // For now, we'll set it as a property
        (smartProxyConfig as any).acmeChallengeHandlers = challengeHandlers;
        (smartProxyConfig as any).acmeChallengePriority = ['dns-01', 'http-01'];
      }
      
      // 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);
      });
      
      if (acmeConfig) {
        this.smartProxy.on('certificate-issued', (event) => {
          console.log(`[DcRouter] Certificate issued for ${event.domain}, expires ${event.expiryDate}`);
        });
        
        this.smartProxy.on('certificate-renewed', (event) => {
          console.log(`[DcRouter] Certificate renewed for ${event.domain}, expires ${event.expiryDate}`);
        });
        
        this.smartProxy.on('certificate-failed', (event) => {
          console.error(`[DcRouter] Certificate failed for ${event.domain}:`, event.error);
        });
      }
      
      // 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 action based on mode
      let action: any;
      
      if (emailConfig.useSocketHandler) {
        // Socket-handler mode
        action = {
          type: 'socket-handler' as any,
          socketHandler: this.createMailSocketHandler(port)
        };
      } else {
        // Traditional forwarding mode
        const defaultPortMapping = {
          25: 10025,   // SMTP
          587: 10587,  // Submission
          465: 10465   // SMTPS
        };
        
        const portMapping = this.options.emailPortConfig?.portMapping || defaultPortMapping;
        const internalPort = portMapping[port] || port + 10000;
        
        action = {
          type: 'forward',
          target: {
            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);
    }
    
    // Add email domain-based routes if configured
    if (emailConfig.routes) {
      for (const route of emailConfig.routes) {
        emailRoutes.push({
          name: route.name,
          match: {
            ports: emailConfig.ports,
            domains: route.match.recipients ? [route.match.recipients.toString().split('@')[1]] : []
          },
          action: {
            type: 'forward',
            target: route.action.type === 'forward' && route.action.forward ? {
              host: route.action.forward.host,
              port: route.action.forward.port || 25
            } : undefined,
            tls: {
              mode: 'passthrough'
            }
          }
        });
      }
    }
    
    return emailRoutes;
  }
  
  /**
   * Generate SmartProxy routes for DNS configuration
   */
  private generateDnsRoutes(): plugins.smartproxy.IRouteConfig[] {
    if (!this.options.dnsDomain) {
      return [];
    }
    
    const dnsRoutes: plugins.smartproxy.IRouteConfig[] = [];
    
    // Create routes for DNS-over-HTTPS paths
    const dohPaths = ['/dns-query', '/resolve'];
    
    for (const path of dohPaths) {
      const dohRoute: plugins.smartproxy.IRouteConfig = {
        name: `dns-over-https-${path.replace('/', '')}`,
        match: {
          ports: [443], // HTTPS port for DoH
          domains: [this.options.dnsDomain],
          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 {
    // Normalize inputs
    domain = domain.toLowerCase();
    pattern = pattern.toLowerCase();
    
    // Check for exact match
    if (domain === pattern) {
      return true;
    }
    
    // Check for wildcard match (*.example.com)
    if (pattern.startsWith('*.')) {
      const patternSuffix = pattern.slice(2); // Remove the "*." prefix
      
      // Check if domain ends with the pattern suffix and has at least one character before it
      return domain.endsWith(patternSuffix) && domain.length > patternSuffix.length;
    }
    
    // No match
    return false;
  }

  public async stop() {
    console.log('Stopping DcRouter services...');
    
    try {
      // Stop all services in parallel for faster shutdown
      await Promise.all([
        // Stop unified email server if running
        this.emailServer ? this.emailServer.stop().catch(err => console.error('Error stopping email server:', 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()
      ]);
      
      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
    };
    
    // Create config with mapped ports
    const emailConfig: IUnifiedEmailServerOptions = {
      ...this.options.emailConfig,
      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.updateRoutes(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;
  }
  
  /**
   * Configure MTA for email handling with custom port and storage settings
   * @param config Configuration for the MTA service
   */
  public async configureEmailMta(config: {
    internalPort: number;
    host?: string;
    secure?: boolean;
    storagePath?: string;
    portMapping?: Record<number, number>;
  }): Promise<boolean> {
    logger.log('info', 'Configuring MTA service with custom settings');
    
    
    // Update email port configuration
    if (!this.options.emailPortConfig) {
      this.options.emailPortConfig = {};
    }
    
    // Configure storage paths for received emails
    if (config.storagePath) {
      // Set the storage path for received emails
      this.options.emailPortConfig.receivedEmailsPath = config.storagePath;
    }
    
    // Apply port mapping if provided
    if (config.portMapping) {
      this.options.emailPortConfig.portMapping = {
        ...this.options.emailPortConfig.portMapping,
        ...config.portMapping
      };
      
      logger.log('info', `Updated MTA port mappings: ${JSON.stringify(this.options.emailPortConfig.portMapping)}`);
    }
    
    // Use the dedicated helper to configure the email server
    // Pass through the options specified by the implementation
    if (this.emailServer) {
      configureEmailServer(this.emailServer, {
        ports: [config.internalPort], // Use whatever port the implementation specifies
        hostname: config.host,
        tls: config.secure ? {
          // Basic TLS settings if secure mode is enabled
          certPath: this.options.tls?.certPath,
          keyPath: this.options.tls?.keyPath,
          caPath: this.options.tls?.caPath
        } : undefined,
        storagePath: config.storagePath
      });
    }
    
    // If email handling is already set up, restart it to apply changes
    if (this.emailServer) {
      logger.log('info', 'Restarting unified email handling to apply MTA configuration changes');
      await this.stopUnifiedEmailComponents();
      await this.setupUnifiedEmailHandling();
    }
    
    return true;
  }
  
  /**
   * 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;
    
    // Group records by domain pattern
    const recordsByDomain = new Map<string, typeof records>();
    
    for (const record of records) {
      const pattern = record.name.includes('*') ? record.name : `*.${record.name}`;
      if (!recordsByDomain.has(pattern)) {
        recordsByDomain.set(pattern, []);
      }
      recordsByDomain.get(pattern)!.push(record);
    }
    
    // Register handlers for each domain pattern
    for (const [domainPattern, domainRecords] of recordsByDomain) {
      const recordTypes = [...new Set(domainRecords.map(r => r.type))];
      
      this.dnsServer.registerHandler(domainPattern, recordTypes, (question) => {
        const matchingRecord = domainRecords.find(
          r => r.name === question.name && r.type === question.type
        );
        
        if (matchingRecord) {
          return {
            name: matchingRecord.name,
            type: matchingRecord.type,
            class: 'IN',
            ttl: matchingRecord.ttl || 300,
            data: this.parseDnsRecordData(matchingRecord.type, matchingRecord.value)
          };
        }
        
        return null;
      });
    }
  }
  
  /**
   * 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;
      default:
        return value;
    }
  }
  
  /**
   * Set up DNS server with socket handler for DoH
   */
  private async setupDnsWithSocketHandler(): Promise<void> {
    if (!this.options.dnsDomain) {
      throw new Error('dnsDomain is required for DNS socket handler setup');
    }
    
    logger.log('info', `Setting up DNS server with socket handler for domain: ${this.options.dnsDomain}`);
    
    // 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: this.options.dnsDomain,
      // 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`);
    
    // Register DNS records if provided
    if (this.options.dnsRecords && this.options.dnsRecords.length > 0) {
      this.registerDnsRecords(this.options.dnsRecords);
      logger.log('info', `Registered ${this.options.dnsRecords.length} DNS records`);
    }
  }
  
  /**
   * 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();
      }
    };
  }
  
  /**
   * Create mail socket handler for email traffic
   */
  private createMailSocketHandler(port: number): (socket: plugins.net.Socket) => Promise<void> {
    return async (socket: plugins.net.Socket) => {
      if (!this.emailServer) {
        logger.log('error', 'Mail socket handler called but email server not initialized');
        socket.end();
        return;
      }
      
      logger.log('debug', `Mail socket handler: handling connection for port ${port}`);
      
      try {
        // Port 465 requires immediate TLS
        if (port === 465) {
          // Wrap the socket in TLS
          const tlsOptions = {
            isServer: true,
            key: this.options.tls?.keyPath ? plugins.fs.readFileSync(this.options.tls.keyPath, 'utf8') : undefined,
            cert: this.options.tls?.certPath ? plugins.fs.readFileSync(this.options.tls.certPath, 'utf8') : undefined
          };
          
          const tlsSocket = new plugins.tls.TLSSocket(socket, tlsOptions);
          
          tlsSocket.on('secure', () => {
            // Pass the secure socket to the email server
            this.emailServer!.handleSocket(tlsSocket, port);
          });
          
          tlsSocket.on('error', (err) => {
            logger.log('error', `TLS handshake error on port ${port}: ${err.message}`);
            socket.destroy();
          });
        } else {
          // For ports 25 and 587, pass raw socket (STARTTLS handled by email server)
          await this.emailServer.handleSocket(socket, port);
        }
      } catch (error) {
        logger.log('error', `Mail socket handler error on port ${port}: ${error.message}`);
        socket.destroy();
      }
    };
  }
}

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

export default DcRouter;