import { IncomingMessage } from 'node:http';
export const error = (msg: string, code = 500) => {
  return JSON.stringify({ code, message: msg });
};
const cookie = {
  parse: (cookieStr: string) => {
    const cookies: Record<string, string> = {};
    const cookiePairs = cookieStr.split(';');
    for (const pair of cookiePairs) {
      const [key, value] = pair.split('=').map((v) => v.trim());
      if (key && value) {
        cookies[key] = decodeURIComponent(value);
      }
    }
    return cookies;
  }
}
/**
 * 从请求中获取token，优先级：Authorization header > query parameter > cookie
 * @param req 
 * @returns 
 */
export const getToken = async (req: IncomingMessage) => {
  let token = (req.headers?.['authorization'] as string) || (req.headers?.['Authorization'] as string) || '';
  const url = new URL(req.url || '', 'http://localhost');
  if (!token) {
    token = url.searchParams.get('token') || '';
  }
  if (!token) {
    const parsedCookies = cookie.parse(req.headers.cookie || '');
    token = parsedCookies.token || '';
  }
  if (token) {
    token = token.replace('Bearer ', '');
  }

  return { token };
};