#!/usr/bin/env node

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

const fs = require('fs')
const parseArgs = require('minimist')
const { Nuxt, Builder, Generator } = require('../')
const resolve = require('path').resolve
const debug = require('debug')('nuxt:build')
debug.color = 2 // Force green color

const argv = parseArgs(process.argv.slice(2), {
  alias: {
    h: 'help',
    c: 'config-file',
    a: 'analyze',
    m: 'mode'
  },
  boolean: ['h', 'a'],
  string: ['c', 'm'],
  default: {
    c: 'nuxt.config.js'
  }
})

if (argv.help) {
  console.log(`
    Description
      Compiles the application for production deployment
    Usage
      $ nuxt build <dir>
    Options
      --analyze, -a                     Launch webpack-bundle-analyzer to optimize your bundles.
      --mode, -m [spa|universal|static] Nuxt Mode (default: universal)
      --config-file, -c                 Path to Nuxt.js config file (default: nuxt.config.js)
      --help, -h                        Displays this message
  `)
  process.exit(0)
}

const rootDir = resolve(argv._[0] || '.')
const nuxtConfigFile = resolve(rootDir, argv['config-file'])

var options = {}
if (fs.existsSync(nuxtConfigFile)) {
  options = require(nuxtConfigFile)
} else if (argv['config-file'] !== 'nuxt.config.js') {
  console.error(`> Could not load config file ${argv['config-file']}`)
  process.exit(1)
}
if (typeof options.rootDir !== 'string') {
  options.rootDir = rootDir
}
// Create production build when calling `nuxt build`
options.dev = false

// Nuxt Mode
if (argv['mode']) {
  options.mode = argv['mode']
}

// Analyze option
options.build = options.build || {}
if (argv.analyze) {
  options.build.analyze = true
}

debug('Building...')
const nuxt = new Nuxt(options)
const builder = new Builder(nuxt)

builder.build()
  .then(() => {
    debug('Building done')
    if (options.mode === 'spa') {
      // Generate on spa mode
      return new Generator(nuxt, builder).generate({ build: false }).then(() => {
        if (!nuxt.options.dev) {
          // eslint-disable-next-line no-console
          console.log(`✓ You can now directly upload ${nuxt.options.generate.dir}/ or start server using "nuxt start"`)
        }
      })
    }
  })
  .catch((err) => {
    console.error(err) // eslint-disable-line no-console
    process.exit(1)
  })