module Docxtor2
  class Package::Document::TableOfContents < Package::Document::Element
    def initialize(text, &block)
      super({ :style => Known::Styles::TOC }, &block)
      @text = text
    end

    # TODO: Add support for extended styling & properties

    def render(xml)
      super(xml)

      @xml.w :sdt, "xmlns:w" => "http://schemas.openxmlformats.org/wordprocessingml/2006/main" do

        write_properties

        @xml.w :sdtContent do

          write_heading

          @xml.w :p do
            @xml.w :pPr do
              @xml.w :pStyle, "w:val" => Known::Styles::TOC_PARAGRAPH
              @xml.w :tabs do
                @xml.w :tab, "w:val" => "right", "w:leader" => "dot", "w:pos" => 9350
              end
              @xml.w :rPr do
                @xml.w :noProof
              end
            end
            @xml.w :r do
              @xml.w :fldChar, "w:fldCharType" => "begin", "w:dirty" => true
            end

            write_instruct

            @xml.w :r do
              @xml.w :fldChar, "w:fldCharType" => "separate"
            end
          end

          @xml.w :p do
            @xml.w :r do
              # @xml.w :rPr do
              #   @xml.w :b
              #   @xml.w :bCs
              #   @xml.w :noProof
              # end
              @xml.w :fldChar, "w:fldCharType" => "end"
            end
          end

        end
      end
    end

    private

    def write_properties
      @xml.w :sdtPr do
        @xml.w :docPartObj do
          @xml.w :docPartGallery, "w:val" => "Table of Contents"
          @xml.w :docPartUnique
        end
      end
    end

    def write_heading
      @xml.w :p do
        @xml.w :pPr do
          @xml.w :pStyle, "w:val" => @params[:style]
        end
        @xml.w :r do
          @xml.w :t do
            @xml.text! @text
          end
        end
      end
    end

    def write_instruct
      @xml.w :r do
        @xml.w :instrText, "xml:space" => "preserve" do
          @xml.text! " TOC \\o '1-3' \\h \\z \\u "
        end
      end
    end

  end
end