import { SimpleRouter } from '@kevisual/router/simple';
import crypto from 'crypto';
import xml2js from 'xml2js';
export const simpleRouter = new SimpleRouter();

simpleRouter.get('/api/wxmsg', async (req, res) => {
  const query = simpleRouter.getSearch(req);
  const body = await simpleRouter.getBody(req);
  const {
    signature, // 微信加密签名，signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
    timestamp, // 时间戳
    nonce, // 随机数
    echostr, // 随机字符串
  } = query;
  const token = 'xiongabc123';
  let str = [token, timestamp, nonce].sort().join('');
  let strSha1 = crypto.createHash('sha1').update(str).digest('hex');
  // 签名对比，相同则按照微信要求返回echostr参数值
  if (signature == strSha1) {
    res.end(echostr);
  } else {
    res.end('send fail');
  }
});

export const getJsonFromXml = async (req: any): Promise<any> => {
  return await new Promise((resolve) => {
    // 读取请求数据
    let data = '';
    req.setEncoding('utf8');
    // 监听data事件，接收数据片段
    req.on('data', (chunk) => {
      data += chunk;
    });
    // 当请求结束时处理数据
    req.on('end', () => {
      try {
        // 使用xml2js解析XML
        xml2js.parseString(data, function (err, result) {
          if (err) {
            console.error('XML解析错误:', err);
            resolve(null);
          } else {
            const jsonString = JSON.stringify(result);
            resolve(jsonString);
          }
        });
      } catch (error) {
        console.error('处理请求时出错:', error);
        resolve(null);
      }
    });
  });
};

simpleRouter.post('/api/wxmsg', async (req, res) => {
  console.log('tuisong');
  const msg = await getJsonFromXml(req);
  console.log('Receive:', msg);
  const builder = new xml2js.Builder();
  const result = builder.buildObject({
    xml: {
      ToUserName: msg.FromUserName,
      FromUserName: msg.ToUserName,
      CreateTime: Date.now(),
      MsgType: msg.MsgType,
      Content: 'Hello ' + msg.Content,
    },
  });
  res.end(result);
});
export const listen = async (req, res) => {
  return await simpleRouter.parse(req, res);
};