// API 代理 - 将 /api/* 请求转发到后端服务
const API_BASE = 'https://tg-live-game-api.ifoodme.com';

export const onRequest: PagesFunction = async (context) => {
  const { request } = context;
  const url = new URL(request.url);

  // 构建目标 URL: /api/auth/login -> https://tg-live-game-api.ifoodme.com/api/auth/login
  const targetUrl = `${API_BASE}${url.pathname}${url.search}`;

  // 复制请求头，移除 host
  const headers = new Headers(request.headers);
  headers.delete('host');
  headers.set('origin', API_BASE);

  // 转发请求
  const response = await fetch(targetUrl, {
    method: request.method,
    headers,
    body: request.method !== 'GET' && request.method !== 'HEAD'
      ? request.body
      : undefined,
  });

  // 复制响应头
  const responseHeaders = new Headers(response.headers);

  // 添加 CORS 头
  responseHeaders.set('Access-Control-Allow-Origin', url.origin);
  responseHeaders.set('Access-Control-Allow-Credentials', 'true');

  return new Response(response.body, {
    status: response.status,
    statusText: response.statusText,
    headers: responseHeaders,
  });
};