layui.define(['jquery', 'form'], function (exports) {


    var $ = layui.$;
    var form = layui.form;

    var DropdownDisable = {
        init: function (options) {
            var dropdownSelector = options.dropdown;
            var inputSelector = options.input;
            var filter = options.filter;
            var disableValue = options.disableValue || "为空";

            var $dropdown = $(dropdownSelector);
            var $input = $(inputSelector);

            if (!$dropdown.length || !$input.length || !filter) return;

            form.on('select(' + filter + ')', function (data) {
                DropdownDisable._updateInput($input, data.value === disableValue);
            });

            DropdownDisable._updateInput($input, $dropdown.val() === disableValue);
        },

        _updateInput: function ($input, disabled) {
            if (disabled) {
                $input.prop('disabled', true)
                    .addClass('layui-disabled')
                    .attr('placeholder', '已禁用输入');
            } else {
                $input.prop('disabled', false)
                    .removeClass('layui-disabled')
                    .attr('placeholder', '请输入内容');
            }
        }
    };

    exports('dropdownDisable', DropdownDisable);
});