const cloud = require('wx-server-sdk')
cloud.init({
  env: "zs-redpackage-0gbq2222433377t1200b6fd
})

function randomString(e) {    
  e = e || 32;
  var t = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678",
  a = t.length,
  n = "";
  for (i = 0; i < e; i++) n += t.charAt(Math.floor(Math.random() * a));
  return n
}
const wxContext = cloud.getWXContext()


exports.main = (event, context) => {
  const timeStamp = new Date().getTime()
  const randomSix = randomString(6)
  const outTradeNo = `${randomSix}${timeStamp}`
  return new Promise((resolve, reject) => {
    cloud.cloudPay.unifiedOrder({
      "functionName": "pay_cb",
      "envId": 'zs-redpackage-0gbq2222433377t1200b6fd',
      "subMchId": "1606636452",
      "nonceStr": randomString(),
      "body": event.name,
      "detail": event.name,
      "outTradeNo": outTradeNo,
      "totalFee": event.price * 100,
      "spbillCreateIp": "221.181.214.198",
      "tradeType": "JSAPI",
      "openid": wxContext.OPENID,
      "subOpenid": wxContext.OPENID,
    }).then(res => {
      if (res.returnCode === 'SUCCESS') {
        resolve({
          success: 1,
          ...res,
          body: event.name,
          detail: event.name,
          totalFee: event.price,
          timeStamp: timeStamp,
          outTradeNo: outTradeNo
        })
      } else {
        reject({
          success: 0,
          ...res
        })
      }
    }).catch(err => {
      reject(err)
    })
  })
}