const Router = require('koa-router');
const router = new Router();
const path = require('path')
const WeChat = require('../util/wechat')
const fs = require('fs')
const configLocal = path.join(__dirname, '../static/wechats.json')

const wcConfig = {
  get () {
    return JSON.parse(fs.readFileSync(configLocal).toString())
  },
  set (data) {
    fs.writeFileSync(configLocal, JSON.stringify(data))
  }
}


router.get('/', async ctx => {
  let { name, uri, callback } = ctx.request.query
  let config = wcConfig.get().find(it => it.name === name)

  if (!config) {
    return ctx.body = '该服务号不存在' 
  }

  let token = await WeChat.getAccessToken(config.AppID, config.AppSecret)
  let ticket = await WeChat.getTicket(token)
  let timestamp = WeChat.grentTimeStamp()
  let nonceStr = WeChat.grentNonceStr()
  let signature = await WeChat.getSignature(ticket, nonceStr, timestamp, uri)
  let result = {
    appId: config.AppID,
    timestamp,
    nonceStr,
    signature
  }
  
  ctx.body = `${callback}(${JSON.stringify(result)})`
})

router.post('/repect', async ctx => {
  let { data } = ctx.request.body

  data.forEach(item => {
    item.domains = item.domains || []
  })

  wcConfig.set(data)
  ctx.body = {
    code: 200
  }
})

module.exports = exports = { path: '/share', router };