# frozen_string_literal: true

module RelatonBib
  # Document status.
  class DocumentStatus
    # @return [RelatonBib::DocumentStatus::Stage]
    attr_reader :stage

    # @return [RelatonBib::DocumentStatus::Stage, nil]
    attr_reader :substage

    # @return [String, nil]
    attr_reader :iteration

    # @param stage [String, Hash, RelatonBib::DocumentStatus::Stage]
    # @param substage [String, Hash, nil, RelatonBib::DocumentStatus::Stage]
    # @param iteration [String, nil]
    def initialize(stage:, substage: nil, iteration: nil)
      @stage = stage_new stage
      @substage = stage_new substage
      @iteration = iteration
    end

    # @param [Nokogiri::XML::Builder]
    def to_xml(builder)
      builder.status do
        # FormattedString.instance_method(:to_xml).bind(status).call builder
        builder.stage { |b| stage.to_xml b }
        builder.substage { |b| substage.to_xml b } if substage
        builder.iteration iteration unless iteration.to_s.empty?
      end
    end

    # @return [Hash]
    def to_hash
      hash = { "stage" => stage.to_hash }
      hash["substage"] = substage.to_hash if substage
      hash["iteration"] = iteration if iteration
      hash
    end

    # @param prefix [String]
    # @return [String]
    def to_asciibib(prefix = "")
      pref = prefix.empty? ? prefix : "#{prefix}."
      out = "#{pref}docstatus.stage:: #{stage.value}\n"
      out += "#{pref}docstatus.substage:: #{substage.value}\n" if substage
      out += "#{pref}docstatus.iteration:: #{iteration}\n" if iteration
      out
    end

    private

    # @param stg [RelatonBib::DocumentStatus::Stage, Hash, String, nil]
    # @return [RelatonBib::DocumentStatus::Stage]
    def stage_new(stg)
      case stg
      when Stage then stg
      when Hash then self.class::Stage.new(**stg)
      when String then self.class::Stage.new(value: stg)
      end
    end

    class Stage
      # @return [String]
      attr_reader :value

      # @return [String, nil]
      attr_reader :abbreviation

      # @param value [String]
      # @param abbreviation [String, nil]
      def initialize(value:, abbreviation: nil)
        @value = value
        @abbreviation = abbreviation
      end

      # @param [Nokogiri::XML::Builder]
      def to_xml(builder)
        builder.parent[:abbreviation] = abbreviation if abbreviation
        builder.text value
      end

      # @return [Hash]
      def to_hash
        hash = { "value" => value }
        hash["abbreviation"] = abbreviation if abbreviation
        hash
      end
    end
  end
end