#!/usr/bin/env ruby

require 'flok'
require 'thor'
require 'fileutils'
require 'webrick'
require_relative '../spec/lib/helpers.rb'

class FlokCLI < Thor
  desc "new <path>", "Create a new flok project and/or module, you may supply an absolute path or relative, the last entry in the path will be the module name and folder name of the project"
  def new path
    #Name of this project
    name = File.basename(path)

    #Get the directory of the given path, if path is only 'foo', then this will go into '.' (nop)
    Dir.chdir File.dirname(path) do
      Flok::Project.create name
    end
  end

  desc "build <platform>", "Build the products for a platform"
  def build platform
    #Create a products folder if it dosen't already exist
    Dir.mkdir("./products") unless File.exists?("./products")

    ENV["PLATFORM"] = platform

    #Go into the flok gem project
    local_products_path = File.join(Dir.pwd, "products")
    Dir.chdir(File.join(File.dirname(__FILE__), "../")) do
      #1. Use the rake task
      system('rake build:world')

      #2. Copy everything in the gems ./flok/products/$PLATFORM -> $PROJECT/products/$PLATFORM
      FileUtils.cp_r "./products/#{platform}", local_products_path
    end

    #3. Build the client's ./app/controllers/*.rb into './products/$PLATFORM/user_compiler.js'
    controller_glob_path = "#{local_products_path}/#{platform}/glob/controllers.rb" 
    Flok.src_glob("rb", './app/controllers', controller_glob_path)
    user_compiler_js = Flok::UserCompiler.compile File.read(controller_glob_path)

    Dir.chdir File.join(local_products_path, platform) do
      #3. Put user_compiler_js in glob folder
      File.write "glob/user_compiler.js", user_compiler_js

      #4. Move application.js to the glob folder
      FileUtils.cp "application.js", "glob/application.js"
      FileUtils.rm "application.js"

      #5. Combine application.js and user_compiler.js.erb
      File.open "glob/application_user.js.erb", "w" do |f|
        f.puts File.read("glob/application.js")
        f.puts File.read("glob/user_compiler.js")
      end

      #6. The `erb` files is then sent to `./products/$PLATFORM/glob/application_user.js` with the below `ERB` variables allowable.
      erb_src = File.read "glob/application_user.js.erb"
      renderr = ERB.new(erb_src)
      context = ERBUserApplicationContext.new()
      new_src = renderr.result(context.get_binding)
      File.write "application_user.js", new_src
    end
  end

  desc "server", "Monitors for changes within your flok application and triggers an automatic rebuild of ./products/* for a PLATFORM when something in ./app changes"
  include SpecHelpers #Contains sh2
  def server platform
    File.write "Guardfile", %{
      guard :shell, :all_on_start => true do
        watch %r{^app/.*} do |m|
          system("#{$0} build #{platform}")
          res = system("#{$0} build #{platform}");
          $stdout.puts "BUILD RAN"
        end
      end
    }

    #Ensure puts does something because it's on another thread
    $stdout.sync = true

    ###########################################################################
    #We execute two tasks that run at the same time, (1) the webrick hoster
    #and (2) the guard reloader that triggers build
    ###########################################################################
    #1) Launch webrick server
    server = WEBrick::HTTPServer.new :Port => 9992, :DocumentRoot => "./products/#{platform}", :StartCallback => Proc.new {
    }
    server_started = false

    #2) Wait for initial build to launch (all_on_start)
    sh2("guard") do |inp, out|
      loop do
        res = out.readline
        if res =~ /BUILD RAN/
          #Start server
          Thread.new { server.start } unless server_started
          server_started = true

          puts "BUILD RAN"
        else
          $stderr.puts res
        end
      end
    end
  end

  #Part of the build command
  class ERBUserApplicationContext
    def get_binding
      return binding
    end

    def initialize
      #Debug / Release
      @debug = (ENV['FLOK_ENV'] == "DEBUG")
      @release = (ENV['FLOK_ENV'] == "RELEASE")
    end
  end
end

FlokCLI.start(ARGV)