fs = require 'fs'
{spawn, exec} = require 'child_process'


closureCompile = (mode, srcPath, destPath, callback = (->)) ->
  modeArgs = {
      pretty: ['--compilation_level', 'WHITESPACE_ONLY',
                 '--formatting', 'PRETTY_PRINT'],
      simple:   ['--compilation_level', 'SIMPLE_OPTIMIZATIONS'],
      advanced: ['--compilation_level', 'ADVANCED_OPTIMIZATIONS'],
  }[mode]
  args = [
    '/usr/bin/env',
    'java',
    '-jar', process.env['CLOSURE_JAR']
  ]
  for x in modeArgs
    args.push x
  args.push '--create_source_map', "#{destPath}.mapping"
  
  exec "cat #{srcPath} | /usr/bin/env #{args.join(' ')} > #{destPath}", (e, out, err) ->
    if e
      console.log out
      console.log err
    callback()


task 'build', () ->
  
  # foo.js
  exec "coffee -c .", () ->
    
    # Got cores?
    closureCompile 'pretty', 'foo.js', 'foo.pretty.js'
    closureCompile 'simple', 'foo.js', 'foo.simple.js', () ->
      closureCompile 'pretty', 'foo.simple.js', 'foo.simple.pretty.js'
    closureCompile 'advanced', 'foo.js', 'foo.advanced.js', () ->
      closureCompile 'pretty', 'foo.advanced.js', 'foo.advanced.pretty.js'