#!/usr/bin/env node

const chalk = require('chalk')

const path = require('path')
const eject = require('./eject')

const program = require('commander')

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

program
  .version(require('../package.json').version)
  .command('eject <dir> [otherDirs...]')
  .description('copy the default skin into .xgplayer/skin for customization.')
  .action((dir = '.', otherDirs = ['custom']) => {
    wrapCommand(eject)(path.resolve(dir), otherDirs[0])
  })
// output help information on unknown commands
program
  .arguments('<command>')
  .action((cmd) => {
    program.outputHelp()
    console.log(`  ` + chalk.red(`Unknown command ${chalk.yellow(cmd)}.`))
    console.log()
  })

// add some useful info on help
program.on('--help', () => {
  console.log()
  console.log(`  Run ${chalk.cyan(`xgplayer <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) {
    if (methodName === 'unknownOption' && this._allowUnknownOption) {
      return
    }
    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()
}

function wrapCommand (fn) {
  return (...args) => {
    return fn(...args).catch(err => {
      console.error(chalk.red(err.stack))
    })
  }
}