require_relative "cleanup_ref"

module Asciidoctor
  module BSI
    class Converter < ISO::Converter
      def cleanup(xmldoc)
        super
        ol_cleanup(xmldoc)
        commentary_cleanup(xmldoc)
        xmldoc
      end

      def ol_cleanup(doc)
        doc.xpath("//clause[not(.//clause)] | //annex | //preface/* | //note")
          .each do |c|
          (c.xpath(".//ol") - c.xpath(".//ul//ol | .//ol//ol"))
            .each_with_index do |l, i|
            ol_cleanup1(l, i)
          end
        end
      end

      def ol_cleanup1(list, idx)
        styles = %w(alphabet arabic roman)
        list["type"] = styles[idx % styles.size]
        (list.xpath(".//ol") - list.xpath(".//ol//ol")).each do |l|
          ol_cleanup1(l, idx + 1)
        end
      end

      def commentary_cleanup(xmldoc)
        @isodoc ||= isodoc(@lang, @script)
        xmldoc.xpath("//admonition[@type = 'commentary'][not(@target)]")
          .each do |a|
          a["target"] = @isodoc.get_clause_id(a)
        end
      end

      def get_id_prefix(xmldoc)
        prefix = []
        xmldoc.xpath("//bibdata/contributor[role/@type = 'publisher']"\
                     "/organization").each do |x|
          x1 = x.at("abbreviation")&.text || x.at("name")&.text
          x1 == "BSI" and prefix.unshift("BS") or prefix << x1
        end
        prefix
      end

      # BS as a prefix goes first
      def docidentifier_cleanup(xmldoc)
        prefix = get_id_prefix(xmldoc)
        id = xmldoc.at("//bibdata/docidentifier[@type = 'BS']") or return
        id.content = id_prefix(prefix, id)
        id = xmldoc.at("//bibdata/ext/structuredidentifier/project-number") and
          id.content = id_prefix(prefix, id)
      end

      def table_footnote_renumber1(fn, i, seen)
        content = footnote_content(fn)
        if seen[content] then outnum = seen[content]
        else
          i += 1
          outnum = i
          seen[content] = outnum
        end
        fn["reference"] = (outnum - 1 + "A".ord).chr
        fn["table"] = true
        [i, seen]
      end

      # TODO: Rules for structure 10.5 amendments:
      # cite as BS 6380:2012+A1, reference as BS 6380:2012+A1:2016

      # TODO: Rules for structure 16.5.2 wording of terms boilerplate:
      # "British Standard (part of BS..)
    end
  end
end