class Widget::Settings < Widget::Base
  dont_cache! # Settings may change due to permissions

  @@settings_to_render = [:filter, :group_by, :controls]

  def render_filter_settings
    render_widget Widget::Settings::Fieldset, @subject,
        { :type => "filters", :help_text => self.filter_help } do
      render_widget Widget::Filters, @subject
    end
  end

  def render_group_by_settings
    render_widget Widget::Settings::Fieldset, @subject,
        { :type => "group_by", :help_text => self.group_by_help } do
      render_widget Widget::GroupBys, @subject
    end
  end

  def render_controls_settings
    content_tag :div, :class => "buttons form_controls" do
      widgets = ''.html_safe
      render_widget(Widget::Controls::Apply, @subject, :to => widgets)
      render_widget(Widget::Controls::Save, @subject, :to => widgets,
                    :can_save => allowed_to?(:save, @subject, current_user))
      if allowed_to?(:create, @subject, current_user)
        render_widget(Widget::Controls::SaveAs, @subject, :to => widgets,
                      :can_save_as_public => allowed_to?(:save_as_public, @subject, current_user))
      end
      render_widget(Widget::Controls::Clear, @subject, :to => widgets)
      render_widget(Widget::Controls::Delete, @subject, :to => widgets,
                    :can_delete => allowed_to?(:delete, @subject, current_user))
    end
  end

  def render
    write(form_tag("#", :id => 'query_form', :method => :post) do
      content_tag :div, :id => "query_form_content" do
        # will render a setting menu for every setting.
        # To add new settings, write a new instance method render_<a name>_setting
        # and add <a name> to the @@settings_to_render list.
        content = ''.html_safe
        @@settings_to_render.each do |setting_name|
          render_method_name = "render_#{setting_name}_settings"
          content << self.send(render_method_name) if respond_to? render_method_name
        end
        content
      end
    end)
  end

  def filter_help
    if help_text.kind_of?(Array)
      help_text[0]
    else
      nil
    end
  end

  def group_by_help
    if help_text.kind_of?(Array)
      help_text[1]
    else
      nil
    end
  end
end