module RelatonIetf
  class IetfBibliographicItem < RelatonBib::BibliographicItem
    DOCTYPES = %w[rfc internet-draft].freeze

    # @return [String, NilClass]
    attr_reader :doctype

    # @return [Array<String>]
    attr_reader :keyword

    # @param doctype [String]
    # @param keyword [Array<String>]
    def initialize(**args)
      if args[:doctype] && !DOCTYPES.include?(args[:doctype])
        warn "[relaton-ietf] WARNING: invalid doctype #{args[:doctype]}"
      end
      super
    end

    #
    # Fetch flavor schema version
    #
    # @return [String] schema version
    #
    def ext_schema
      @ext_schema ||= schema_versions["relaton-model-ietf"]
    end

    # @param hash [Hash]
    # @return [RelatonIetf::IetfBibliographicItem]
    def self.from_hash(hash)
      item_hash = ::RelatonIetf::HashConverter.hash_to_bib(hash)
      new(**item_hash)
    end

    # @param opts [Hash]
    # @option opts [Nokogiri::XML::Builder] :builder XML builder
    # @option opts [Boolean] :bibdata
    # @option opts [Symbol, NilClass] :date_format (:short), :full
    # @option opts [String, Symbol] :lang language
    # @return [String] XML
    def to_xml(**opts)
      opts[:date_format] ||= :short
      super(**opts)
    end

    #
    # Render BibXML (RFC)
    #
    # @param [Nokogiri::XML::Builder, nil] builder
    # @param [Boolean] include_keywords (false)
    #
    # @return [String, Nokogiri::XML::Builder::NodeBuilder] XML
    #
    def to_bibxml(builder = nil, include_keywords: false)
      Renderer::BibXML.new(self).render builder: builder, include_keywords: include_keywords
    end
  end
end