#!/usr/bin/env node --harmony_proxies

const http = require('http')
const fs = require('fs')
const serveStatic = require('serve-static')
const Nuxt = require('../')
const { resolve } = require('path')

const rootDir = resolve(process.argv.slice(2)[0] || '.')
const nuxtConfigFile = resolve(rootDir, 'nuxt.config.js')
let options = {}
if (fs.existsSync(nuxtConfigFile)) {
  options = require(nuxtConfigFile)
}
if (typeof options.rootDir !== 'string') {
  options.rootDir = rootDir
}

new Nuxt(options)
.then((nuxt) => {
  new Server(nuxt)
  .listen(process.env.PORT, process.env.HOST)
})
.catch((err) => {
  console.error(err)
  process.exit()
})

class Server {

  constructor (nuxt) {
    this.server = http.createServer(this.handle.bind(this))
    this.staticServer = serveStatic('static', { fallthrough: false })
    this.nuxt = nuxt
    return this
  }

  handle (req, res) {
    const method = req.method.toUpperCase()

    if (method !== 'GET' && method !== 'HEAD') {
      return this.nuxt.render(req, res)
    }
    this._staticHandler(req, res)
    .catch((e) => {
      // File not found
      this.nuxt.render(req, res)
    })
  }

  listen (port, host) {
    host = host || 'localhost'
    port = port || 3000
    this.server.listen(port, host, () => {
      console.log('Ready on http://%s:%s', host, port)
    })
  }

  _staticHandler (req, res) {
    return new Promise((resolve, reject) => {
      this.staticServer(req, res, (error) => {
        if (!error) {
          return resolve()
        }
        error.message = `Route ${error.message} while resolving ${req.url}`
        reject(error)
      })
    })
  }
}