# -*- encoding : utf-8 -*-

require_dependency "card/content/diff"

class Card
  class Format
    class HtmlFormat < Format
      register :html

      attr_accessor :options_need_save, :start_time, :skip_autosave

      # builtin layouts allow for rescue / testing
      LAYOUTS = Mod::Loader.load_layouts.merge "none" => "{{_main}}"

      # helper methods for layout view
      def get_layout_content
        Auth.as_bot do
          if (requested_layout = params[:layout])
            layout_from_card_or_code requested_layout
          else
            layout_from_rule
          end
        end
      end

      def layout_from_rule
        if (rule = card.rule_card :layout) &&
           (rule.type_id == Card::PointerID) &&
           (layout_name = rule.item_names.first)
          layout_from_card_or_code layout_name
        end
      end

      def layout_from_card_or_code name
        layout_card = Card.fetch name.to_s, skip_virtual: true,
                                            skip_modules: true
        if layout_card && layout_card.ok?(:read)
          layout_card.content
        elsif (hardcoded_layout = LAYOUTS[name])
          hardcoded_layout
        else
          "<h1>Unknown layout: #{name}</h1>"\
          "Built-in Layouts: #{LAYOUTS.keys.join(', ')}"
        end
      end

      def get_nest_defaults nested_card
        { view: (nested_card.rule(:default_html_view) || :titled) }
      end

      def default_item_view
        :closed
      end

      def html_escape_except_quotes s
        # to be used inside single quotes (makes for readable json attributes)
        s.to_s.gsub(/&/, "&amp;").gsub(/\'/, "&apos;")
         .gsub(/>/, "&gt;").gsub(/</, "&lt;")
      end

      def main?
        if show_layout?
          @depth == 1 && @mainline # assumes layout includes {{_main}}
        else
          @depth.zero? && params[:is_main]
        end
      end

      def focal? # meaning the current card is the requested card
        if show_layout?
          main?
        else
          @depth.zero?
        end
      end
    end
  end
end