fs            = require 'fs'
{print}       = require 'util'
{spawn, exec} = require 'child_process'
glob          = require 'glob'


# Configurations

config = {}
config.binPath = './node_modules/.bin/'


# Cake tasks

# `cake build`
# Builds all assets that are needed to run the application in production.
task 'build', 'Builds what is needed for production', ->
  buildApp()

# `cake docs`
# Builds the documentation files.
task 'docs', 'Generate annotated source code with docco', ->
  serverFilesForDocs (files) ->
    options = ['-o', 'docs/server'].concat(files)
    run 'docco', options
  clientFilesForDocs (files) ->
    options = ['-o', 'docs/client'].concat(files)
    run 'docco', options


# Internal methods

# Spawns an application with `options` and calls `onExit`
# when it finishes.
run = (bin, options, onExit) ->
  bin = config.binPath + bin
  console.log timeNow() + ' - running: ' + bin + ' ' + (if options? then options.join(' ') else "")
  cmd = spawn bin, options
  cmd.stdout.on 'data', (data) -> print data.toString()
  cmd.stderr.on 'data', (data) -> print data.toString()
  cmd.on 'exit', (code) ->
    console.log 'done.'
    onExit?(code, options)

# Returns a string with the current time to print out.
timeNow = ->
  today = new Date()
  today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds()

# Runs the command to build the application for use in production.
buildApp = ->
  options = ['-o', 'public/js/build.js']
  run 'r.js', options

# Returns an array with all files from the server that should be used when generating
# the documentation
serverFilesForDocs = (callback) ->
  r = []
  glob '*.coffee', (error, files) ->
    r = r.concat(files)
    glob '*.js', (error, files) ->
      r = r.concat(files)
      glob 'routes/**/*.coffee', (error, files) ->
        r = r.concat(files)
        glob 'lib/**/*.coffee', (error, files) ->
          r = r.concat(files)
          callback(r)

# Returns an array with all files from the client that should be used when generating
# the documentation
clientFilesForDocs = (callback) ->
  glob 'public/**/*.coffee', (error, files) ->
    callback(files)