text: const fs = require('fs')
  const path = require('path')
  const express = require('express')
  const bodyParser = require('body-parser')
  const request = require('./util/request')
  const packageJSON = require('./package.json')
  const exec = require('child_process').exec
  const cache = require('./util/apicache').middleware
  const { cookieToJson } = require('./util/index')
  const fileUpload = require('express-fileupload');
  // version check
  exec('npm info NeteaseCl   oudMusicApi version', (err, stdout, stderr) => {
    if(!err){
      let version = stdout.trim()
      if(packageJSON.version < version){
        console.log(`最新版本: ${version}, 当前版本: ${packageJSON.version}, 请及时更新`)
      }
    }
  })
  
  const app = express()
  
  // CORS & Preflight request
  app.use((req, res, next) => {
    // if(req.path !== '/' && !req.path.includes('.')){
    //   res.set({
    //     'Access-Control-Allow-Credentials': true,
    //     'Access-Control-Allow-Origin': req.headers.origin || '*',
    //     'Access-Control-Allow-Headers': 'X-Requested-With,Content-Type',
    //     'Access-Control-Allow-Methods': 'PUT,POST,GET,DELETE,OPTIONS',
    //     'Content-Type': 'application/json; charset=utf-8'
    //   })
    // }
      res.set({
        // 'Access-Control-Allow-Credentials': true,
        'Access-Control-Allow-Origin': '*',
        // 'Access-Control-Allow-Headers': 'X-Requested-With,Content-Type',
        // 'Access-Control-Allow-Methods': 'PUT,POST,GET,DELETE,OPTIONS',
        'Content-Type': 'application/json; charset=utf-8'
      })  
    req.method === 'OPTIONS' ? res.status(204).end() : next()
  })
  
  // cookie parser
  app.use((req, res, next) => {
    req.cookies = {}, (req.headers.cookie || '').split(/\s*;\s*/).forEach(pair => {
      let crack = pair.indexOf('=')
      if(crack < 1 || crack == pair.length - 1) return
      req.cookies[decodeURIComponent(pair.slice(0, crack)).trim()] = decodeURIComponent(pair.slice(crack + 1)).trim()
    })
    next()
  })
  
  // body parser
  app.use(bodyParser.json())
  app.use(bodyParser.urlencoded({extended: false}))
  
  app.use(fileUpload());
  
  
  
  // static
  app.use(express.static(path.join(__dirname, 'public')))
  
  // cache
  app.use(cache('2 minutes', ((req, res) => res.statusCode === 200)))
  // router
  const special = {
    'daily_signin.js': '/daily_signin',
    'fm_trash.js': '/fm_trash',
    'personal_fm.js': '/personal_fm'
  }
  
  fs.readdirSync(path.join(__dirname, 'module')).reverse().forEach(file => {
    if(!file.endsWith('.js')) return
    let route = (file in special) ? special[file] : '/' + file.replace(/\.js$/i, '').replace(/_/g, '/')
    route = '/api' + route;
    let question = require(path.join(__dirname, 'module', file))
  
    console.log(route)
    app.use(route, (req, res) => {
      if(typeof req.query.cookie === 'string'){
        req.query.cookie = cookieToJson(req.query.cookie)
      }
      let query = Object.assign({}, {cookie: req.cookies}, req.query, req.body, req.files )
  
      question(query, request)
        .then(data => {
          console.log('[OK]', decodeURIComponent(req.originalUrl))
          // res.append('Set-Cookie', answer.cookie)
          res.status(data.status).send(data.data)
        })
        .catch(answer => {
        //   console.log('[ERR]', decodeURIComponent(req.originalUrl), {status: answer.status, body: answer.body})
        //   if(answer.body.code == '301') answer.body.msg = '需要登录'
        //   res.append('Set-Cookie', answer.cookie)
        //   res.status(answer.status).send(answer.body)
        })
    })
  })
  
  const port = process.env.PORT || 3000
  const host = process.env.HOST || ''
  
  app.server = app.listen(port, host, () => {
    console.log(`server running @ http://${host ? host : 'localhost'}:${port}`)
  })
  
  require('./util/mongodb').connect();
  
  module.exports = app
  