require 'fileutils'

namespace :assets do
  desc "Compile all the assets"
  task :precompile do
    Rake::Task["assets:precompile:all"].invoke
  end

  desc "Remove compiled assets"
  task :clean do
    puts "Removing compiled assets..."
    FileUtils.rm_rf(Dir.glob(File.join(_public_folder, '**', '*')))
    puts "Done!"
  end

  namespace :precompile do
    task :all do
      puts "Compiling all assets..."      
      Rake::Task["assets:precompile:css"].invoke
      Rake::Task["assets:precompile:js"].invoke
      Rake::Task["assets:precompile:img"].invoke
      Rake::Task["assets:precompile:font"].invoke
      puts "Done!"
    end

    task :css do
      _css_files.each do |css_file|
        _compile(css_file, false)
        _compile(css_file, true)
      end
    end

    task :js do
      _js_files.each do |js_file|
        _compile(js_file, false)
        _compile(js_file, true)
      end
    end

    task :img do
      _img_files.each do |img_file|
        _compile(img_file, false)
      end
    end

    task :font do
      _font_files.each do |font_file|
        _compile(font_file, false)
      end
    end
  end

  private

  def _public_folder 
    File.join(ClassyAssets::Configuration.public_path, ClassyAssets::Configuration.asset_prefix)
  end

  def _assets_root
    File.join(ClassyAssets::Configuration.root_path, ClassyAssets::Configuration.asset_prefix)
  end

  def _asset_files(type)
    files = Dir.glob(File.join(_assets_root, type, '**', '*'))
    files.reject! {|f| File.directory?(f) }
    files.map! {|f| Pathname.new(f).basename.to_s }
    files.to_a
  end

  def _css_files
    _asset_files('stylesheets')
  end

  def _js_files
    _asset_files('javascripts')
  end
  
  def _img_files
    _asset_files('images')
  end

  def _font_files
    _asset_files('fonts')
  end

  def _path_to(filename)
    Pathname.new(File.join(_public_folder, filename))
  end

  def _sprockets
    @sprockets ||= ClassyAssets::Configuration.sprockets
  end
  
  def _replace_ext(filename)
    filename.gsub!(/sass$|scss$/,'css')
    filename.gsub!(/coffee$/,'js')
    filename
  end

  def _compile(filename, compress = false)
    filename = _replace_ext(filename)
    asset = _sprockets[filename]
    if compress
      file = _path_to(filename + ".gz")
    else
      file = _path_to(filename)
    end
    FileUtils.mkdir_p file.dirname
    asset.write_to(file, { compress: compress })
    puts " ✓ #{file.basename}"
  end
end