module RProgram
  module Options
    module ClassMethods
      #
      # @return [Hash]
      #   All defined non-options of the class.
      #
      def non_options
        @non_options ||= {}
      end

      #
      # Searches for the non-option with the matching name in the class
      # and it's ancestors.
      #
      # @param [Symbol, String] name
      #   The name to search for.
      #
      # @return [true, false]
      #   Specifies whether the non-option with the matching name was
      #   defined.
      #
      def has_non_option?(name)
        name = name.to_sym

        ancestors.each do |base|
          if base.include?(RProgram::Options)
            return true if base.non_options.include?(name)
          end
        end

        return false
      end

      #
      # Searches for the non-option with the matching name in the class
      # and it's ancestors.
      #
      # @param [Symbol, String] name
      #   The name to search for.
      #
      # @return [NonOption]
      #   The non-option with the matching name.
      #
      def get_non_option(name)
        name = name.to_sym

        ancestors.each do |base|
          if base.include?(RProgram::Options)
            if base.non_options.has_key?(name)
              return base.non_options[name]
            end
          end
        end

        return nil
      end

      #
      # @return [Hash]
      #   All defined options for the class.
      #
      def options
        @options ||= {}
      end

      #
      # Searches for the option with the matching name in the class and
      # it's ancestors.
      #
      # @param [Symbol, String] name
      #   The name to search for.
      #
      # @return [true, false]
      #   Specifies whether the option with the matching name was defined.
      #
      def has_option?(name)
        name = name.to_sym

        ancestors.each do |base|
          if base.include?(RProgram::Options)
            return true if base.options.has_key?(name)
          end
        end

        return false
      end

      #
      # Searches for the option with the matching name in the class and
      # it's ancestors.
      #
      # @param [Symbol, String] name
      #   The name to search for.
      #
      # @return [Option]
      #   The option with the matching name.
      #
      def get_option(name)
        name = name.to_sym

        ancestors.each do |base|
          if base.include?(RProgram::Options)
            return base.options[name] if base.options.has_key?(name)
          end
        end

        return nil
      end
    end
  end
end