require "date"
require "nokogiri"
require "htmlentities"
require "json"
require "pathname"
require "open-uri"
require "pp"

module Asciidoctor
  module ISO
    module Front
      def metadata_id(node, xml)
        xml.id do |i|
          i.project_number node.attr("docnumber"),
            **attr_code(part: node.attr("partnumber"))
          if node.attr("tc-docnumber")
            i.tc_document_number node.attr("tc-docnumber")
          end
        end
      end

      def metadata_version(node, xml)
        xml.version do |v|
          v.edition node.attr("edition") if node.attr("edition")
          v.revision_date node.attr("revdate") if node.attr("revdate")
          v.draft node.attr("draft") if node.attr("draft")
        end
      end

      def metadata_author(node, xml)
        xml.creator **{ role: "author" } do |a|
          a.technical_committee node.attr("technical-committee"),
            **attr_code(number: node.attr("technical-committee-number"))
          if node.attr("subcommittee")
            a.subcommittee node.attr("subcommittee"),
              **attr_code(number: node.attr("subcommittee-number"))
          end
          if node.attr("workgroup")
            a.workgroup node.attr("workgroup"),
              **attr_code(number: node.attr("workgroup-number"))
          end
          a.secretariat node.attr("secretariat") if node.attr("secretariat")
        end
      end

      def metadata_copyright(node, xml)
        from = node.attr("copyright-year") || Date.today.year
        xml.copyright do |c|
          c.from from
          c.owner do |o|
            o.affiliation "ISO"
          end
        end
      end

      def metadata_status(node, xml)
        xml.status do |s|
          s.stage ( node.attr("docstage") || "60" )
          s.substage ( node.attr("docsubstage") || "60" )
        end
      end

      def metadata(node, xml)
        metadata_status(node, xml)
        metadata_author(node, xml)
        xml.language node.attr("language")
        xml.script "latn"
        xml.type node.attr("doctype")
        metadata_id(node, xml)
        metadata_version(node, xml)
        metadata_copyright(node, xml)
      end

      def title(node, xml)
        ["en", "fr"].each do |lang|
          xml.title **{ language: lang } do |t|
            if node.attr("title-intro-#{lang}")
              t.title_intro { |t1| t1 << node.attr("title-intro-#{lang}") }
            end
            t.title_main { |t1| t1 << node.attr("title-main-#{lang}") }
            if node.attr("title-part-#{lang}")
              t.title_part node.attr("title-part-#{lang}")
            end
          end
        end
      end
    end
  end
end