#!/usr/bin/env node

const fs = require('fs')
const path = require('path')
const slash = require('slash')
const chalk = require('chalk')
const semver = require('semver')
const { error } = require('@vue/cli-shared-utils')
const requiredVersion = require('../package.json').engines.node

if (!semver.satisfies(process.version, requiredVersion)) {
  error(
    `You are using Node ${process.version}, but this version of vue-cli ` +
    `requires Node ${requiredVersion}.\nPlease upgrade your Node version.`
  )
  process.exit(1)
}

// enter debug mode when creating test repo
if (slash(process.cwd()).indexOf('/packages/test') > 0 &&
    fs.existsSync(path.resolve(process.cwd(), '../@vue'))) {
  process.env.VUE_CLI_DEBUG = true
}

const program = require('commander')
const loadCommand = require('../lib/util/loadCommand')

program
  .version(require('../package').version)
  .usage('<command> [options]')

program
  .command('create <app-name>')
  .description('create a new project powered by vue-cli-service')
  .option('-s, --saved', 'Skip prompts and use saved config')
  .option('-d, --default', 'Skip prompts and use default config')
  .option('-c, --config <json>', 'Skip prompts and use inline JSON string as config')
  .option('-r, --registry <url>', 'Use specified NPM registry when installing dependencies')
  .option('-m, --package-manager <command>', 'Use specified NPM client when installing dependencies')
  .option('-f, --force', 'Overwrite target directory if it exists')
  .action((name, cmd) => {
    require('../lib/create')(name, cleanArgs(cmd))
  })

program
  .command('serve [entry]')
  .description('serve a .js or vue file in development mode with zero config')
  .option('-o, --open', 'Open browser')
  .action((entry, cmd) => {
    loadCommand('serve', '@vue/cli-service-global').serve(entry, cleanArgs(cmd))
  })

program
  .command('build [entry]')
  .description('build a .js or .vue file in production mode with zero config')
  .action((entry, cmd) => {
    loadCommand('build', '@vue/cli-service-global').build(entry, cleanArgs(cmd))
  })

program
  .command('init <template> <app-name>')
  .description('generate a project from a remote template (legacy API, requires @vue/cli-init)')
  .action(() => {
    loadCommand('init', '@vue/cli-init')
  })

// add some useful info on help
program.on('--help', () => {
  console.log()
  console.log(`  Run ${chalk.cyan(`vue <command> --help`)} for detailed usage of given command.`)
  console.log()
})

program.commands.forEach(c => c.on('--help', () => console.log()))

// enhance common error messages
const enhanceErrorMessages = (methodName, log) => {
  program.Command.prototype[methodName] = function (...args) {
    this.outputHelp()
    console.log(`  ` + chalk.red(log(...args)))
    console.log()
    process.exit(1)
  }
}

enhanceErrorMessages('missingArgument', argName => {
  return `Missing required argument ${chalk.yellow(`<${argName}>`)}.`
})

enhanceErrorMessages('unknownOption', optionName => {
  return `Unknown option ${chalk.yellow(optionName)}.`
})

enhanceErrorMessages('optionMissingArgument', (option, flag) => {
  return `Missing required argument for option ${chalk.yellow(option.flags)}` + (
    flag ? `, got ${chalk.yellow(flag)}` : ``
  )
})

program.parse(process.argv)

if (!process.argv.slice(2).length) {
  program.outputHelp()
}

// commander passes the Command object itself as options,
// extract only actual options into a fresh object.
function cleanArgs (cmd) {
  const args = {}
  cmd.options.forEach(o => {
    const key = o.long.replace(/^--/, '')
    args[key] = cmd[key]
  })
  return args
}