/**
 * 客户端检测工具函数
 * 用于在服务器端从请求头中获取客户端信息
 */

/**
 * 从请求头中检测客户端ID
 * @param request - Remix Request对象
 * @returns 客户端ID字符串
 */
export const detectClientFromRequest = (request: Request): string => {
  // 从Nginx传递的头部获取客户端ID
  const clientId = request.headers.get('X-Client-ID');
  const originalPort = request.headers.get('X-Original-Port');
  
  if (clientId) {
    console.log(`🎯 检测到客户端ID: ${clientId} (端口: ${originalPort})`);
    return clientId;
  }
  
  // 根据端口映射客户端ID（备用方案）
  const portToClient: Record<string, string> = {
    '5174': 'client-a',
    '5175': 'client-b',
    '5176': 'client-c', 
    '5177': 'client-d'
  };
  
  if (originalPort && portToClient[originalPort]) {
    console.log(`🎯 通过端口映射检测到客户端: ${portToClient[originalPort]} (端口: ${originalPort})`);
    return portToClient[originalPort];
  }
  
  console.log('⚠️ 未能检测到客户端ID，使用默认值: main');
  return 'main';
};

/**
 * 获取请求的调试信息
 * @param request - Remix Request对象
 * @returns 调试信息对象
 */
export const getRequestDebugInfo = (request: Request) => {
  return {
    url: request.url,
    method: request.method,
    clientId: request.headers.get('X-Client-ID'),
    originalPort: request.headers.get('X-Original-Port'),
    forwardedPort: request.headers.get('X-Forwarded-Port'),
    realIp: request.headers.get('X-Real-IP'),
    forwardedFor: request.headers.get('X-Forwarded-For'),
    userAgent: request.headers.get('User-Agent')
  };
};