const { Nuxt, Builder } = require('nuxt')
const app = require('express')()
const proxy = require('http-proxy-middleware')
const cookiejar = require('cookiejar')
const isProd = (process.env.NODE_ENV === 'production')
const host = process.env.HOST || '127.0.0.1'
const port = process.env.PORT || 4444
process.noDeprecation = true
app.set('port', port)

// We instantiate nuxt.js with the options
const config = require('./nuxt.config.js')
config.dev = !isProd


// 请求代理，dev模式下使用，接口服务器如果支持跨域可去掉
const proxyTable = config.proxyTable
if (proxyTable) {
  // 本地代理支持localhost、127.0.0.1等不同地址跨域
  app.use((req, res, next) => {
    res.header('Access-Control-Allow-Origin', '*')
    res.header('Access-Control-Allow-Methods', 'GET,POST,PUT,DELETE,TRACE,OPTIONS,PATCH')
    res.header('Access-Control-Allow-Headers', 'Origin,X-Requested-With,Content-Type,Accept,withCredentials')
    res.header('Access-Control-Allow-Credentials', 'true')
    next()
  })
  if (Array.isArray(proxyTable)) {
    app.use(proxy(proxyTable, {
      target: config.env.baseUrl,
      changeOrigin: true,
      logLevel: config.dev ? 'debug' : 'info',
      onProxyRes: (proxyRes) => {
        const setCookieHeaders = proxyRes.headers['set-cookie'] || []
        const modifiedSetCookieHeaders = setCookieHeaders
          .map(str => new cookiejar.Cookie(str))
          .map(cookie => {
            cookie.path = '/'
            return cookie
          })
          .map(cookie => cookie.toString())
        proxyRes.headers['set-cookie'] = modifiedSetCookieHeaders
      }
    }))
  } else {
    Object.keys(proxyTable).forEach((context) => {
      let options = proxyTable[context]
      if (typeof options === 'string') {
        options = { target: options }
      }
      app.use(proxy(context, options))
    })
  }
  // axios use proxy url
  config.env.proxyUrl = '/'
}


const nuxt = new Nuxt(config)

// Render every route with Nuxt.js
app.use(nuxt.render)

// Build only in dev mode with hot-reloading
if (config.dev) {
  new Builder(nuxt).build()
    .then(listen)
    .catch((error) => {
      console.error(error)
      process.exit(1)
    })
}
else {
  listen()
}

function listen() {
  // Listen the server
  app.listen(port)
  console.log(`\n Server listening on ${host}:${port}, at ${new Date().toLocaleString()} \n to api ${config.env.baseUrl}`)
}