# encoding: utf-8
require 'active_support/json/encoding'

module Ckeditor
  module Utils
    autoload :JavascriptCode, 'ckeditor/utils/javascript_code'
    autoload :ContentTypeDetector, 'ckeditor/utils/content_type_detector'

    class << self
      def escape_single_quotes(str)
        str.gsub('\\','\0\0').gsub('</','<\/').gsub(/\r\n|\n|\r/, "\\n").gsub(/["']/) { |m| "\\#{m}" }
      end

      def parameterize_filename(filename)
        return filename unless Ckeditor.parameterize_filenames

        extension = File.extname(filename)
        basename = filename.gsub(/#{extension}$/, "")

        [basename.parameterize('_'), extension].join.downcase
      end

      def js_replace(dom_id, options = nil)
        js = ["(function() { if (typeof CKEDITOR != 'undefined') {"]

        if options && !options.keys.empty?
          js_options = ActiveSupport::JSON.encode(options)
          js << "if (CKEDITOR.instances['#{dom_id}'] == undefined) { CKEDITOR.replace('#{dom_id}', #{js_options}); }"
        else
          js << "if (CKEDITOR.instances['#{dom_id}'] == undefined) { CKEDITOR.replace('#{dom_id}'); }"
        end

        js << "} else { setTimeout(arguments.callee, 50); } })();"
        js.join(" ").html_safe
      end

      def js_fileuploader(uploader_type, options = {})
        options = { :multiple => true, :element => "fileupload" }.merge(options)

        case uploader_type.to_s.downcase
          when "image" then
            options[:action] = JavascriptCode.new("EDITOR.config.filebrowserImageUploadUrl")
            options[:allowedExtensions] = Ckeditor.image_file_types
          when "flash" then
            options[:action] = JavascriptCode.new("EDITOR.config.filebrowserFlashUploadUrl")
            options[:allowedExtensions] = ["swf"]
          else
            options[:action] = JavascriptCode.new("EDITOR.config.filebrowserUploadUrl")
            options[:allowedExtensions] = Ckeditor.attachment_file_types
        end

        js_options = ActiveSupport::JSON.encode(options)
        js_options.gsub!(/"(EDITOR\.config\.filebrowser(Image|Flash|)UploadUrl)"/, '\1')

        "(function() { new qq.FileUploaderInput(#{js_options}); }).call(this);".html_safe
      end

      def filethumb(filename)
        extname = filename.blank? ? "unknown" : File.extname(filename).gsub(/^\./, '')
        image = "#{extname}.gif"
        source = Ckeditor.root_path.join("app/assets/javascripts/ckeditor/filebrowser/images/thumbs")

        unless File.exists?(File.join(source, image))
          image = "unknown.gif"
        end

        File.join(Ckeditor.relative_path, "filebrowser/images/thumbs", image)
      end

      def select_assets(path, relative_path)
        relative_folder = Ckeditor.root_path.join(relative_path)
        folder = relative_folder.join(path)
        extensions = '*.{js,css,png,gif,jpg}'
        languages = (Ckeditor.assets_languages || ['en', 'ru'])

        # Files at root
        files = Dir[folder.join(extensions)]

        # Filter plugins
        if Ckeditor.assets_plugins.nil?
          files += Dir[folder.join('plugins', '**', extensions)]
        else
          Ckeditor.assets_plugins.each do |plugin|
            files += Dir[folder.join('plugins', plugin, '**', extensions)]
          end
        end

        # Other folders
        Dir[folder.join('*/')].each do |subfolder|
          path = Pathname.new(subfolder)
          next if ['plugins'].include?(path.basename.to_s)
          files += Dir[path.join('**', extensions)]
        end

        files.inject([]) do |items, name|
          file = Pathname.new(name)
          base = file.basename('.*').to_s

          if !name.include?('/lang/') || languages.include?(base)
            items << file.relative_path_from(relative_folder).to_s
          end

          items
        end
      end
    end
  end
end