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

module Ckeditor
  module Utils
    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 = ["if (typeof CKEDITOR != 'undefined') {"]

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

        js << "}"
        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] = "EDITOR.config.filebrowserImageUploadUrl"
            options[:allowedExtensions] = Ckeditor.image_file_types
          when "flash" then
            options[:action] = "EDITOR.config.filebrowserFlashUploadUrl"
            options[:allowedExtensions] = ["swf"]
          else
            options[:action] = "EDITOR.config.filebrowserUploadUrl"
            options[:allowedExtensions] = Ckeditor.attachment_file_types
        end

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

        "(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,scss}'

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

        # 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)
          unless path.basename.to_s == 'plugins'
            files += Dir[path.join('**', extensions)]
          end
        end

        paths = files.map { |file| Pathname.new(file) }

        # Filter languages
        if Ckeditor.assets_languages.present?
          paths.select! do |path|
            path.dirname.basename.to_s != 'lang' ||
            Ckeditor.assets_languages.include?(path.basename.to_s.split('.')[0])
          end
        end

        paths.map { |path| path.relative_path_from(relative_folder).to_s.gsub('.scss', '') }.select { |path| path != 'ckeditor/ckeditor.js' }
      end
    end
  end
end