module EasyAdminUi
  module CoreExt
    def self.included(base)
      base.extend ClassMethods
    end
  
    module ClassMethods
      attr_accessor :options
    
      def easy_admin(options = {})
        @options = options

        make_resourceful do
          actions :all
    
          response_for :index do |format|
            format.html do
              @options = options
              override = File.join('app/views', self.controller_path, 'index.html.erb')
              if File.exists?(override)
                render :template => override.gsub('app/views', '')
              else
                render :template => 'easy_admin_ui/index'
              end
            end
          end

          response_for :show do |format|
            format.html { redirect_to :action => 'index' }
          end

          [:new, :create_fails].each do |new_action|
            response_for new_action do |format|
              format.html do
                override = File.join(controller_full_path, 'new.html.erb')
                if File.exists?(override)
                  render :template => override.gsub('app/views', '')
                else
                  render :template => 'easy_admin_ui/new'
                end
              end
            end
          end

          [:edit, :update_fails].each do |edit_action|
            response_for edit_action do |format|
              format.html do
                override = File.join(controller_full_path, 'edit.html.erb')
                if File.exists?(override)
                  render :template => override.gsub('app/views', '')
                else
                  render :template => 'easy_admin_ui/edit'
                end
              end
            end
          end

          response_for :destroy do |format|
            format.js do
              render :update do |page|
                page.remove "tr_#{current_model_name.underscore}_#{@item.id}"
              end
            end
          end
        end

        class_eval do
          def options
            self.class.options
          end

          def current_objects
            @items = current_model.paginate(:page => params[:page], :per_page => options[:per_page], :order => options[:order])
          end

          def current_object
            @item ||= current_model.find(params[:id]) if params[:id]
            @item ||= current_model.new(params[current_model_name.underscore.to_sym])
          end

          def instance_variable_name
            'item'
          end

          helper_method :controller_full_path
          def controller_full_path
            File.join 'app/views', self.controller_path
          end
        end
      end
    end
  end
end