'use strict';

const moment = require('moment')

module.exports = function (app, opts) {
   async function token4yingshi ({ key, secret, token, expire } = {}) {
      const { models } = app.fs.dc
      if (!key || !secret) {
         throw '参数 { key, secret } 缺一不可'
      }

      if (token && expire && moment().isBefore(moment(expire))) {
         return token
      } else {
         const secretRes = await models.SecretYingshi.findOne({
            where: { key, secret }
         })
         if (secretRes && secretRes.expire && secretRes.token && moment().isBefore(moment(secretRes.expire))) {
            return secretRes.token
         }
      }

      // 也可以做基于 redis 的缓存
      const tokenRes = await app.fs.yingshiRequest.post(`lapp/token/get`, {
         query: {
            appKey: key,
            appSecret: secret
         }
      })
      if (tokenRes.code == 200) {
         const { accessToken, expireTime } = tokenRes.data
         await models.SecretYingshi.update({
            token: accessToken,
            expire: expireTime
         }, {
            where: {
               key, secret
            }
         })
         return accessToken
      } else {
         throw tokenRes
      }
   }

   return {
      token4yingshi
   }
}