require_relative "init"
require "roman-numerals"
require "isodoc"
require_relative "../../relaton/render/general"
require_relative "presentation_bibdata"
require_relative "presentation_preface"

module IsoDoc
  module ITU
    class PresentationXMLConvert < IsoDoc::PresentationXMLConvert
      def bibrender_formattedref(formattedref, _xml)
        formattedref << "." unless /\.$/.match?(formattedref.text)
        id = reference_format_start(formattedref.parent) and
          formattedref.children.first.previous = id
      end

      def bibrender_relaton(xml, renderings)
        f = renderings[xml["id"]][:formattedref]
        ids = reference_format_start(xml)
        f &&= "<formattedref>#{ids}#{f}</formattedref>"
        # retain date in order to generate reference tag
        keep = "./docidentifier | ./uri | ./note | ./date | ./biblio-tag"
        xml.children = "#{f}#{xml.xpath(ns(keep)).to_xml}"
      end

      def multi_bibitem_ref_code(bib)
        skip = IsoDoc::Function::References::SKIP_DOCID
        skip1 = "@type = 'metanorma' or @type = 'metanorma-ordinal'"
        prim = "[@primary = 'true']"
        id = bib.xpath(ns("./docidentifier#{prim}[not(#{skip} or #{skip1})]"))
        id.empty? and id = bib.xpath(ns("./docidentifier#{prim}[not(#{skip1})]"))
        id.empty? and id = bib.xpath(ns("./docidentifier[not(#{skip} or #{skip1})]"))
        id.empty? and id = bib.xpath(ns("./docidentifier[not(#{skip1})]"))
        id.empty? and return id
        id.sort_by { |i| i["type"] == "ITU" ? 0 : 1 }
      end

      def render_multi_identifiers(ids)
        ids.map do |id|
          if id["type"] == "ITU" then doctype_title(id)
          else
            docid_prefix(id["type"], id.text.sub(/^\[/, "").sub(/\]$/, ""))
          end
        end.join("&#xA0;| ")
      end

      def reference_format_start(bib)
        id = multi_bibitem_ref_code(bib)
        id1 = render_multi_identifiers(id)
        out = id1
        date = bib.at(ns("./date[@type = 'published']/on | " \
          "./date[@type = 'published']/from")) and
          out << " (#{date.text.sub(/-.*$/, '')})"
        out += ", " if date || !id1.empty?
        out
      end

      def bibliography_bibitem_number1(bib, idx)
        mn = bib.at(ns(".//docidentifier[@type = 'metanorma']")) and
          /^\[?\d+\]?$/.match?(mn.text) and
          mn["type"] = "metanorma-ordinal"
        if (mn = bib.at(ns(".//docidentifier[@type = 'metanorma-ordinal']"))) &&
            !bibliography_bibitem_number_skip(bib)
          idx += 1
          mn.children = "[#{idx}]"
        end
        idx
      end

      def bibliography_bibitem_number_skip(bibitem)
        @xrefs.klass.implicit_reference(bibitem) ||
          bibitem["hidden"] == "true" || bibitem.parent["hidden"] == "true"
      end

      def norm_ref_entry_code(_ordinal, idents, _ids, _standard, datefn, _bib)
        ret = (idents[:metanorma] || idents[:ordinal] || idents[:sdo]).to_s
        /^\[.+\]$/.match?(ret) or ret = "[#{ret}]"
        ret += datefn
        ret.empty? and return ret
        ret.gsub("-", "&#x2011;").gsub(/ /, "&#xa0;")
      end

      def biblio_ref_entry_code(_ordinal, idents, _id, _standard, datefn, _bib)
        ret = (idents[:metanorma] || idents[:ordinal] || idents[:sdo]).to_s
        /^\[.+\]$/.match?(ret) or ret = "[#{ret}]"
        ret += datefn
        ret.empty? and return ret
        ret.gsub("-", "&#x2011;").gsub(/ /, "&#xa0;")
      end
    end
  end
end