# frozen_string_literal: true

module Axlsx
  # a vml drawing used for comments in Excel.
  class VmlDrawing
    # creates a new Vml Drawing object.
    # @param [Comments] comments the comments object this drawing is associated with
    def initialize(comments)
      raise ArgumentError, "you must provide a comments object" unless comments.is_a?(Comments)

      @comments = comments
    end

    # The part name for this vml drawing
    # @return [String]
    def pn
      format(VML_DRAWING_PN, @comments.worksheet.index + 1)
    end

    # serialize the vml_drawing to xml.
    # @param [String] str
    # @return [String]
    def to_xml_string(str = +'')
      str << <<~XML
        <xml xmlns:v="urn:schemas-microsoft-com:vml"
         xmlns:o="urn:schemas-microsoft-com:office:office"
         xmlns:x="urn:schemas-microsoft-com:office:excel">
         <o:shapelayout v:ext="edit">
          <o:idmap v:ext="edit" data="#{@comments.worksheet.index + 1}"/>
         </o:shapelayout>
         <v:shapetype id="_x0000_t202" coordsize="21600,21600" o:spt="202"
          path="m0,0l0,21600,21600,21600,21600,0xe">
          <v:stroke joinstyle="miter"/>
          <v:path gradientshapeok="t" o:connecttype="rect"/>
         </v:shapetype>
      XML
      @comments.each { |comment| comment.vml_shape.to_xml_string str }
      str << "</xml>"
    end
  end
end
