class EacRubyUtils::CommonConstructor

def args_count
  (args_count_min..args_count_max)
end

def args_count_max
  args.count
end

def args_count_min
  args.count - default_values.count
end

def default_values
  options[:default] || []
end

def initialize(*args, &after_set_block)
  args_processed = self.class.parse_args_options(args)
  @args = args_processed.args
  @options = args_processed.options
  @after_set_block = after_set_block
end

def parse_arg_options_process_arg(result, arg)
  if arg.is_a?(::Hash)
    result.options = arg
    true
  else
    result.args << arg
    false
  end
end

def parse_args_options(args)
  result = ::OpenStruct.new(args: [], options: {})
  options_reached = false
  args.each do |arg|
    raise "Options reached and there is more arguments (Arguments: #{args})" if
    options_reached
    options_reached = parse_arg_options_process_arg(result, arg)
  end
  result
end

def setup_class(klass)
  setup_class_attr_readers(klass)
  setup_class_attr_writers(klass)
  setup_class_initialize(klass)
end

def setup_class_attr_readers(klass)
  klass.send(:attr_reader, *args)
  klass.send(:public, *args)
end

def setup_class_attr_writers(klass)
  klass.send(:attr_writer, *args)
  klass.send(:private, *args.map { |a| "#{a}=" })
end

def setup_class_initialize(klass)
  common_constructor = self
  klass.include(::ActiveSupport::Callbacks)
  klass.define_callbacks :initialize
  klass.send(:define_method, :initialize) do |*args|
    Initialize.new(common_constructor, args, self).run
  end
end