# frozen_string_literal: true

module Ezdoc
  module Xml
    class StylesXml
      NAMESPACE = "http://schemas.openxmlformats.org/wordprocessingml/2006/main"

      ALIGNMENT_MAP = {
        left: "left",
        center: "center",
        right: "right",
        justify: "both"
      }.freeze

      def initialize(styles)
        @styles = styles
      end

      def to_xml
        builder = Nokogiri::XML::Builder.new(encoding: "UTF-8") do |xml|
          xml.styles("xmlns:w" => NAMESPACE) do
            xml.parent.namespace = xml.parent.namespace_definitions.find { |ns| ns.prefix == "w" }

            @styles.each_value do |style|
              render_style(xml, style)
            end
          end
        end
        builder.to_xml
      end

      private

      def render_style(xml, style)
        style_type = style.paragraph_properties? ? "paragraph" : "character"

        xml["w"].style("w:type" => style_type, "w:styleId" => style.style_id) do
          xml["w"].name("w:val" => style.display_name)

          render_paragraph_properties(xml, style) if style.paragraph_properties?
          render_run_properties(xml, style) if style.text_properties?
        end
      end

      def render_paragraph_properties(xml, style)
        xml["w"].pPr do
          xml["w"].jc("w:val" => ALIGNMENT_MAP[style.align]) if style.align
          xml["w"].ind("w:left" => style.indent.to_s) if style.indent
          xml["w"].spacing("w:before" => style.spacing_before.to_s) if style.spacing_before
          xml["w"].spacing("w:after" => style.spacing_after.to_s) if style.spacing_after
        end
      end

      def render_run_properties(xml, style)
        xml["w"].rPr do
          xml["w"].rFonts("w:ascii" => style.font, "w:hAnsi" => style.font) if style.font
          xml["w"].sz("w:val" => style.size_half_points.to_s) if style.size
          xml["w"].color("w:val" => style.color) if style.color
          xml["w"].b if style.bold
          xml["w"].i if style.italic
          xml["w"].u("w:val" => "single") if style.underline
        end
      end
    end
  end
end