#!/usr/bin/env node

var onchange = require('./')
var arrify = require('arrify')

// Parse argv with minimist...it's easier this way.
var argv = require('minimist')(process.argv.slice(2), {
  '--': true,
  boolean: ['v', 'i', 'w', 'await-write-finish'],
  string: ['e', 'c', 'killSignal'],
  alias: {
    verbose: ['v'],
    initial: ['i'],
    exclude: ['e'],
    wait: ['w'],
    cwd: ['c'],
    delay: ['d'],
    poll: ['p'],
    outpipe: ['o'],
    filter: ['f']
  },
  default: {
    exclude: '**/node_modules/**'
  }
})

// Print usage info
if (!argv._.length || argv.help) {
  console.log('Usage: onchange [...file] -- <command> [...args]')
  process.exit()
}

// Setup some storage variables
var matches = argv._.slice()
var args = argv['--'].slice()
var command = args.shift()

var options = {
  exclude: typeof argv.exclude === 'boolean' ? [] : arrify(argv.exclude),
  verbose: argv.verbose,
  initial: argv.initial,
  wait: argv.wait,
  cwd: argv.cwd,
  delay: argv.delay,
  poll: argv.poll,
  killSignal: argv.killSignal,
  outpipe: argv.outpipe,
  filter: argv.filter && (Array.isArray(argv.filter) ? argv.filter : argv.filter.split(/\W+/)),
  awaitWriteFinish: argv['await-write-finish']
}

if (!command && !options.outpipe) {
  console.error('Remember to pass the command after "--":')
  console.error('  onchange \'**/*.js\' -- echo \'{{changed}}\'')
  process.exit(1)
}

// Start watcher
onchange(matches, command, args, options)