#!/usr/bin/env node

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

const fs = require('fs')
const parseArgs = require('minimist')
const debug = require('debug')('nuxt:generate')

const { Nuxt, Builder, Generator } = require('../')
const resolve = require('path').resolve

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

if (argv.help) {
  console.log(`
    Description
      Generate a static web application (server-rendered)
    Usage
      $ nuxt generate <dir>
    Options
      --mode, -m [spa|universal|ssr-only] 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
}
options.dev = false // Force production mode (no webpack middleware called)

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

debug('Generating...')
const nuxt = new Nuxt(options)
const builder = new Builder(nuxt)
const generator = new Generator(nuxt, builder)
generator.generate()
  .then(() => {
    debug('Generate done')
    process.exit(0)
  })
  .catch((err) => {
    console.error(err) // eslint-disable-line no-console
    process.exit(1)
  })