/**
 * Used to parse the .env.development proxy configuration
 */
import type { ProxyOptions } from 'vite';

type ProxyItem = [string, string];

type ProxyList = ProxyItem[];

type ProxyTargetList = Record<string, ProxyOptions>;

const httpsRE = /^https:\/\//;

/**
 * Generate proxy
 * @param listStr
 */
export function createProxy(listStr: string = '') {
  if (!listStr) return [];
  let list: ProxyList = [];
  try {
    list = JSON.parse(listStr.replaceAll("'", '"'));
  } catch {
    return [];
  }
  const ret: ProxyTargetList = {};
  for (const [prefix, target] of list) {
    const isHttps = httpsRE.test(target);

    // https://github.com/http-party/node-http-proxy#options
    ret[prefix] = {
      // 代理目标地址
      target,
      changeOrigin: true,
      ws: true,
      rewrite: (path) => path.replace(new RegExp(`^${prefix}`), ''),
      // https is require secure=false
      ...(isHttps ? { secure: false } : {}),
    };
  }
  return ret;
}