layui.define(['form', 'common', 'ajax'], function (exports) {
    let $ = layui.$;
    let form = layui.form;
    let layer = layui.layer;
    let common = layui.common;
    let ajax = layui.ajax;

    /**
     * 获取选择的option
     *
     * @param selectId 下拉框ID
     * @param selectedValue 选择的值
     * @return {DOMStringMap|null}
     */
    function getSelectedOption(selectId, selectedValue) {
        let options = $(selectId).children();
        for (let i = 0; i < options.length; i++) {
            let option = options[i];
            if (selectedValue === option.value) {
                return option;
            }
        }
        return null;
    }

    /**
     * 正常
     * @param opt
     */
    function dataDynamic(opt) {
        let url = opt.url;
        let name = opt.name;
        let valueKey = opt.valueKey ? opt.valueKey : '';
        let nameKey = opt.nameKey ? opt.nameKey : '';
        let where = opt.where ? opt.where : {};
        let formFilter = opt.formFilter;
        let selectedValue = opt.selectedValue;
        // 请求得到的列表Key，格式'a.b.c'
        let dataListKey = opt.dataListKey ? opt.dataListKey : '';
        let required = typeof (opt.required) !== 'undefined' && opt.required !== null ? opt.required : false;
        let optionDatasetKeyArray = opt.optionDatasetKeyArray && $.isArray(opt.optionDatasetKeyArray) ? opt.optionDatasetKeyArray : [];
        let onInit = opt.onInit && $.isFunction(opt.onInit) ? opt.onInit : null;
        let onSelect = opt.onSelect && $.isFunction(opt.onSelect) ? opt.onSelect : null;
        let elemContainer = $(`#${name}Container`);

        /**
         * 初始化容器
         */
        function initContainer() {
            elemContainer.empty();
            elemContainer.append(`
                <select id="${name}" name="${name}" lay-filter="${name}Select" ${required ? 'lay-verify="required"' : ''}></select>
            `);
        }

        /**
         * 初始化选项
         */
        function initOption() {
            let elem = $(`#${name}`);
            elem.empty();
            ajax.get(url, where, null, function (code, data) {
                let optionArray = ['<option value="">请选择</option>'];
                let dataList = data;
                if (dataListKey) {
                    let dataListKeyArray = dataListKey.split('.');
                    $.each(dataListKeyArray, function (i, key) {
                        dataList = dataList[key];
                    })
                }
                $.each(dataList, function (i, item) {
                    let optionValue = valueKey ? item[valueKey] : item;
                    let optionName = nameKey ? item[nameKey] : item;
                    let optionDatasetArray = [];
                    $.each(optionDatasetKeyArray, function (j, optionDatasetKey) {
                        let optionDatasetValue = item[optionDatasetKey];
                        if (!optionDatasetValue) {
                            return;
                        }
                        optionDatasetArray.push(`data-${common.camelCase2lineCase(optionDatasetKey)}="${optionDatasetValue}"`);
                    });
                    optionArray.push(`<option value="${optionValue}" ${(selectedValue && selectedValue === optionValue) ? 'selected' : ''} ${optionDatasetArray.join(' ')}>${optionName}</option>`);
                });
                elem.append(optionArray.join(''));
                // 赋值
                if (selectedValue) {
                    let formData = {};
                    formData[`${name}`] = selectedValue;
                    form.val(formFilter, formData);
                    onInit ? onInit(selectedValue, getSelectedOption(`#${name}`, selectedValue)) : null;
                }
                form.render('select', formFilter);
            }, function (code, data) {
                layer.msg(data.msg);
            });
        }

        /**
         * 添加事件
         */
        function addEvent() {
            form.on(`select(${name}Select)`, function (data) {
                let selectedOption = getSelectedOption(`#${name}`, data.value);
                onSelect ? onSelect(data, selectedOption) : null;
            });
        }

        initContainer();
        initOption();
        addEvent();
    }

    /**
     * 静态数据
     * @param opt
     */
    function dataStatic(opt) {
        let name = opt.name;
        let options = opt.options;
        let formFilter = opt.formFilter;
        let selectedValue = opt.selectedValue;
        let required = typeof (opt.required) !== 'undefined' && opt.required !== null ? opt.required : false;
        let onInit = opt.onInit && $.isFunction(opt.onInit) ? opt.onInit : null;
        let onSelect = opt.onSelect && $.isFunction(opt.onSelect) ? opt.onSelect : null;
        let elemContainer = $(`#${name}Container`);

        /**
         * 初始化容器
         */
        function initContainer() {
            elemContainer.empty();
            elemContainer.append(`
                <select id="${name}" name="${name}" lay-filter="${name}Select" ${required ? 'lay-verify="required"' : ''}></select>
            `);
        }

        /**
         * 初始化选项
         */
        function initOption() {
            let elem = $(`#${name}`);
            elem.empty();
            let optionArray = ['<option value="">请选择</option>'];
            $.each(options, function (i, option) {
                let value = option['value'];
                let title = option['title'];
                let optionDatasetArray = [];
                for (let key in option) {
                    if (key === 'value' || key === 'title') {
                        continue;
                    }
                    optionDatasetArray.push(`data-${common.camelCase2lineCase(key)}="${option[key]}"`);
                }
                optionArray.push(`<option value="${value}" ${(selectedValue && selectedValue === value) ? 'selected' : ''} ${optionDatasetArray.join(' ')}>${title}</option>`);
            });
            elem.append(optionArray.join(''));
            // 赋值
            if (selectedValue) {
                let formData = {};
                formData[`${name}`] = selectedValue;
                form.val(formFilter, formData);
                onInit ? onInit(selectedValue, getSelectedOption(`#${name}`, selectedValue)) : null;
            }
            form.render('select', formFilter);
        }

        /**
         * 添加事件
         */
        function addEvent() {
            form.on(`select(${name}Select)`, function (data) {
                let selectedOption = getSelectedOption(`#${name}`, data.value);
                onSelect ? onSelect(data, selectedOption) : null;
            });
        }

        initContainer();
        initOption();
        addEvent();
    }

    /**
     * 数据字典
     * @param opt
     */
    function dataDictionary(opt) {
        dataDynamic({
            url: ajax.path('api/data/list/parent-id/{parentId}', [opt.parentId]),
            name: opt.name,
            required: opt.required,
            formFilter: opt.formFilter,
            valueKey: 'dataId',
            nameKey: 'dataName',
            selectedValue: opt.selectedValue,
            optionDatasetKeyArray: opt.optionDatasetKeyArray,
            where: opt.where,
            onInit: opt.onInit,
            onSelect: opt.onSelect
        })
    }

    exports('select', {
        dataDynamic: dataDynamic,
        dataStatic: dataStatic,
        dataDictionary: dataDictionary
    });
});