module CMDx::CoreExt::ModuleExtensions

def __cmdx_attr_delegator(*methods, **options)
  methods.each do |method|
    method_name = Utils::NameAffix.call(method, options.fetch(:to), options)
    define_method(method_name) do |*args, **kwargs, &block|
      object = (options[:to] == :class ? self.class : send(options[:to]))
      unless options[:allow_missing] || object.respond_to?(method, true)
        raise NoMethodError,
              "undefined method `#{method}' for #{options[:to]}"
      end
      object.send(method, *args, **kwargs, &block)
    end
    case options
    in { protected: true } then send(:protected, method_name)
    in { private: true } then send(:private, method_name)
    else # Leave public
    end
  end
end

def __cmdx_attr_setting(method, **options)
  define_singleton_method(method) do
    @cmd_facets ||= {}
    return @cmd_facets[method] if @cmd_facets.key?(method)
    value = superclass.__cmdx_try(method)
    return @cmd_facets[method] = value.dup unless value.nil?
    default = options[:default]
    value   = default.__cmdx_call
    @cmd_facets[method] = default.is_a?(Proc) ? value : value.dup
  end
end