const express = require('express');
const app = express();
const tencentcloud = require('tencentcloud-sdk-nodejs-intl-en');

const CccClient = tencentcloud.ccc.v20200210.Client;
const models = tencentcloud.ccc.v20200210.Models;

const Credential = tencentcloud.common.Credential;
const ClientProfile = tencentcloud.common.ClientProfile;
const HttpProfile = tencentcloud.common.HttpProfile;

app.get('/genUserSig', (req, res) => {
  // Read the userId from the request parameters (for example, /genUserSig?userId=qiao123).
  // Unique user identifier in the caller's business system.
  const userId = req.query.userId;

  if (!userId) {
    return res.status(400).send({
      error: 'Missing parameter: userId is required',
    });
  }

  let cred = new Credential('Your_SecretId', 'Your_SecretKey');
  let httpProfile = new HttpProfile();

  httpProfile.endpoint = 'ccc.intl.tencentcloudapi.com';
  let clientProfile = new ClientProfile();
  clientProfile.httpProfile = httpProfile;

  let client = new CccClient(cred, 'ap-singapore', clientProfile);
  let clientReq = new models.CreateUserSigRequest();
  let params = {
    SdkAppId: 20000000,
    Uid: userId,
    ExpiredTime: 3600,
    // Optional field.
    // ClientData: 'xxx',
  };

  clientReq.from_json_string(JSON.stringify(params));
  client.CreateUserSig(clientReq, function (err, response) {
    if (err) {
      console.log(err);
      res.status(500).send({
        error: err.message || 'Internal Server Error',
      });
      return;
    }

    res.send({
      userId: userId,
      userSig: response.UserSig,
      // ClientData is an optional field. However, if it is specified in the request, it must be returned to SDK initialization.
      // userClientData: params.ClientData,
    });
  });
});