// Node 脚本：生成带 storeId 的小程序 URL Link（可指定体验版）
// 优点：可直接分享为链接或转成二维码，支持 env_version
// 用法（Windows PowerShell）：
//   $env:WX_APPID="wxbb048b80cd2a14b9"; $env:WX_SECRET="<你的AppSecret>"; node server/generate-url-link.js

const https = require('https');

const APPID = process.env.WX_APPID || 'wxbb048b80cd2a14b9';
const SECRET = process.env.WX_SECRET; // 必须提供 AppSecret

const STORE_ID = 'ARhMGM5Y1W';
const PATH = 'nova-pbf/pages/index/index';
const QUERY = `storeId=${STORE_ID}`;
const ENV_VERSION = 'trial'; // 可选: 'develop' | 'trial' | 'release'

function httpGetJson(url) {
  return new Promise((resolve, reject) => {
    https
      .get(url, (res) => {
        let data = '';
        res.on('data', (chunk) => (data += chunk));
        res.on('end', () => {
          try {
            const json = JSON.parse(data);
            resolve(json);
          } catch (e) {
            reject(e);
          }
        });
      })
      .on('error', reject);
  });
}

function httpPostJson(url, bodyObj) {
  const body = JSON.stringify(bodyObj);
  return new Promise((resolve, reject) => {
    const req = https.request(url, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Content-Length': Buffer.byteLength(body),
      },
    });
    let data = '';
    req.on('response', (res) => {
      res.on('data', (chunk) => (data += chunk));
      res.on('end', () => {
        try {
          const json = JSON.parse(data);
          resolve(json);
        } catch (e) {
          reject(e);
        }
      });
    });
    req.on('error', reject);
    req.write(body);
    req.end();
  });
}

async function main() {
  if (!SECRET) {
    console.error('❌ 未提供 WX_SECRET（AppSecret）。请设置环境变量后重试。');
    process.exit(1);
  }

  console.log('🔑 获取 access_token...');
  const tokenResp = await httpGetJson(
    `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${APPID}&secret=${SECRET}`
  );
  if (!tokenResp.access_token) {
    console.error('❌ 获取 access_token 失败:', tokenResp);
    process.exit(1);
  }
  const accessToken = tokenResp.access_token;
  console.log('✅ access_token 获取成功');

  console.log('🔗 生成 URL Link...');
  const apiUrl = `https://api.weixin.qq.com/wxa/generate_urllink?access_token=${accessToken}`;
  const payload = {
    path: PATH,
    query: QUERY,
    env_version: ENV_VERSION,
    is_expire: false,
  };

  const resp = await httpPostJson(apiUrl, payload);
  if (!resp.url_link) {
    console.error('❌ 生成 URL Link 失败:', resp);
    process.exit(1);
  }

  console.log('✅ URL Link 生成成功：');
  console.log(resp.url_link);
  console.log('📌 打开该链接即可跳转到小程序（环境：', ENV_VERSION, '），并携带 query:', QUERY);
}

main().catch((e) => {
  console.error('程序异常:', e);
  process.exit(1);
});