#!/usr/bin/env node
import { resolve, join, basename } from 'path'
import parseArgs from 'minimist'
import { exists, writeFile, mkdir } from 'mz/fs'

const argv = parseArgs(process.argv.slice(2), {
  alias: {
    h: 'help'
  },
  boolean: ['h']
})

const dir = resolve(argv._[0] || '.')

exists(join(dir, 'package.json'))
.then(async present => {
  if (basename(dir) === 'pages') {
    console.warn('Your root directory is named "pages". This looks suspicious. You probably want to go one directory up.')
    return
  }

  if (!present) {
    await writeFile(join(dir, 'package.json'), basePackage.replace(/my-app/g, basename(dir)))
  }

  if (!await exists(join(dir, 'static'))) {
    await mkdir(join(dir, 'static'))
  }

  if (!await exists(join(dir, 'pages'))) {
    await mkdir(join(dir, 'pages'))
    await writeFile(join(dir, 'pages', 'index.js'), basePage)
  }
})
.catch((err) => {
  console.error(err)
  process.exit(1)
})

const basePackage = `{
  "name": "my-app",
  "description": "my app",
  "dependencies": {
    "next": "latest"
  },
  "scripts": {
    "dev": "next",
    "build": "next build",
    "start": "next start"
  }
}`

const basePage =`
import React from 'react'
export default () => <p>Hello, world</p>
`