import type { ProxyOptions } from 'vite';

/**
 * 处理运行环境配置项，使其拥有正确的类型
 *
 * @template E
 * @param {(Record<keyof E, string> | E)} importMetaEnv 导入的环境变量
 * @returns {E}
 */
export const resolveEnv = <E extends ImportMetaEnv>(importMetaEnv: Record<keyof E, string> | E): E => {
  const ret = {} as unknown as E;
  const envNameList = Object.keys(importMetaEnv) as (keyof E)[];

  for (const envName of envNameList) {
    let value = typeof importMetaEnv[envName] === 'string' && importMetaEnv[envName].replace(/\\n/g, '\n');
    value = value === 'true' ? true : value === 'false' ? false : value;

    if (typeof value === 'string' && value.startsWith('[') && value.endsWith(']')) {
      try {
        value = JSON.parse(value.replace(/'/g, '"'));
      } catch (error) {
        value = '';
      }
    }
    ret[envName] = value;
  }

  return ret;
};

/**
 * 开发服务器代理配置
 *
 * @template L extends [string, ...string[]][]
 * @param {L} list 代理配置项
 */
export const resolveProxy = <L extends [string, ...string[]][]>(list: L) => {
  const httpsRE = /^https:\/\//;
  const ret: Record<string, ProxyOptions> = {};

  if (typeof list === 'object') {
    for (const [prefix, target] of list) {
      const isHttps = httpsRE.test(target!);

      // https://github.com/http-party/node-http-proxy#options
      ret[prefix] = {
        target: target,
        changeOrigin: true,
        ws: true,
        rewrite: (path) => path.replace(new RegExp(`^${prefix}`), ''),
        // https 需要开启 secure = false
        ...(isHttps ? { secure: false } : {}),
      };
    }
  }

  return ret;
};