#!/usr/bin/env node

// Show logs
process.env.DEBUG = 'nuxt:*'

var _ = require('lodash')
var debug = require('debug')('nuxt:build')
debug.color = 2 // force green color
var fs = require('fs')
var Nuxt = require('../')
var chokidar = require('chokidar')
var resolve = require('path').resolve
var without = require('lodash').without

var nuxtConfigFileName = 'nuxt.config.js'

// --config-file option
var indexOfConfig = false
if (process.argv.indexOf('--config-file') !== -1) {
  indexOfConfig = process.argv.indexOf('--config-file')
} else if (process.argv.indexOf('-c') !== -1) {
  indexOfConfig = process.argv.indexOf('-c')
}

if (indexOfConfig !== false) {
  nuxtConfigFileName = process.argv.slice(indexOfConfig)[1]
  process.argv = without(process.argv, '--config-file', '-c', nuxtConfigFileName)
}

var rootDir = resolve(process.argv.slice(2)[0] || '.')
var nuxtConfigFile = resolve(rootDir, nuxtConfigFileName)

var options = {}
if (fs.existsSync(nuxtConfigFile)) {
  options = require(nuxtConfigFile)
}
if (typeof options.rootDir !== 'string') {
  options.rootDir = rootDir
}
options.dev = true // Add hot reloading and watching changes

var nuxt = module.exports = new Nuxt(options)
var port = process.env.PORT || process.env.npm_package_config_nuxt_port
var host = process.env.HOST || process.env.npm_package_config_nuxt_host
var server = nuxt.server = new nuxt.Server(nuxt).listen(port, host)

listenOnConfigChanges(nuxt, server)

nuxt.build()
  .catch((err) => {
    console.error(err) // eslint-disable-line no-console
    process.exit(1)
  })

function listenOnConfigChanges(nuxt, server) {
  // Listen on nuxt.config.js changes
  var build = _.debounce(() => {
    debug('[nuxt.config.js] changed')
    delete require.cache[nuxtConfigFile]
    var options = {}
    if (fs.existsSync(nuxtConfigFile)) {
      try {
        options = require(nuxtConfigFile)
      } catch (e) {
        return console.error(e) // eslint-disable-line no-console
      }
    }
    options.rootDir = rootDir
    nuxt.close()
      .then(() => {
        nuxt.renderer = null
        debug('Rebuilding the app...')
        return new Nuxt(options).build()
      })
      .then((nuxt) => {
        server.nuxt = nuxt
      })
      .catch((error) => {
        console.error('Error while rebuild the app:', error) // eslint-disable-line no-console
        process.exit(1)
      })
  }, 200)
  var nuxtConfigFile = resolve(rootDir, nuxtConfigFileName)
  chokidar.watch(nuxtConfigFile, Object.assign({}, nuxt.options.watchers.chokidar, {ignoreInitial: true}))
    .on('all', build)
}