(function ($) {
    $(function () {

        var addFormGroup = function (event) {
            event.preventDefault();

            //var $formGroup = $(this).closest('.form-group');
            var $formGroup = $(this).closest('.form-group');
            var $multipleFormGroup = $formGroup.closest('.multiple-form-group');
            var $formGroupClone = $formGroup.clone();

            $(this)
                .toggleClass('btn-default btn-add btn-danger btn-remove')
                .html('Remover');

            $formGroupClone.find('input').val('');
            $formGroupClone.insertAfter($formGroup);

            var $lastFormGroupLast = $multipleFormGroup.find('.form-group:last');
            if ($multipleFormGroup.data('max') <= countFormGroup($multipleFormGroup)) {
                $lastFormGroupLast.find('.btn-add').attr('disabled', false);
            }
        };

        var removeFormGroup = function (event) {
            event.preventDefault();

            var $formGroup = $(this).closest('.form-group');
            var $multipleFormGroup = $formGroup.closest('.multiple-form-group');

            var $lastFormGroupLast = $multipleFormGroup.find('.form-group:last');
            if ($multipleFormGroup.data('max') >= countFormGroup($multipleFormGroup)) {
                $lastFormGroupLast.find('.btn-add').attr('disabled', false);
            }

            $formGroup.remove();
        };

        var countFormGroup = function ($form) {
            return $form.find('.form-group').length;
        };

        $(document).on('click', '.btn-add', addFormGroup);
        $(document).on('click', '.btn-remove', removeFormGroup);

    });
})(jQuery);