<!--
* @Descripttion: 表格选择器组件
* @version: 1.3
* @Author: sakuya
* @Date: 2021年6月10日10:04:07
* @LastEditors: sakuya
* @LastEditTime: 2022年6月6日21:50:36
-->

<template>
<el-select ref="select" v-model="defaultLable" :clearable="clearable" :multiple="multiple" :collapse-tags="collapseTags" :collapse-tags-tooltip="collapseTagsTooltip" :filterable="filterable" :placeholder="placeholder" :disabled="disabled" :filter-method="filterMethod" @remove-tag="removeTag" @visible-change="visibleChange" @clear="clear">
	<template #header>
		<slot name="header" :form="formData" :submit="formSubmit"></slot>
	</template>
	<template #empty>
		<div :style="{width: tableWidth+'px'}" v-loading="loading">
			<el-table ref="table" :data="tableData" :height="245" :highlight-current-row="!multiple" @row-click="click" @select="select" @select-all="selectAll">
				<el-table-column v-if="multiple" type="selection" width="45"></el-table-column>
				<el-table-column v-else type="index" width="45">
					<template #default="scope"><span>{{scope.$index+(currentPage - 1) * pageSize + 1}}</span></template>
				</el-table-column>
				<slot></slot>
			</el-table>
		</div>
	</template>
	<template #footer>
		<el-pagination background layout="prev, pager, next" :total="total" :page-size="pageSize" v-model:currentPage="currentPage" @current-change="reload"></el-pagination>
	</template>
</el-select>
</template>

<script>
import config from "@/config/tableSelect";

export default {
	props: {
		modelValue: null,
		apiObj: { type: Object, default: () => {} },
		params: { type: Object, default: () => {} },
		placeholder: { type: String, default: "请选择" },
		size: { type: String, default: "default" },
		clearable: { type: Boolean, default: false },
		multiple: { type: Boolean, default: false },
		filterable: { type: Boolean, default: false },
		collapseTags: { type: Boolean, default: false },
		collapseTagsTooltip: { type: Boolean, default: false },
		disabled: { type: Boolean, default: false },
		tableWidth: {type: Number, default: 400},
		mode: { type: String, default: "popover" },
		props: { type: Object, default: () => {} }
	},
	data() {
		return {
			loading: false,
			keyword: null,
			defaultValue: [],
			defaultLable: [],
			tableData: [],
			pageSize: config.pageSize,
			total: 0,
			currentPage: 1,
			defaultProps: {
				label: config.props.label,
				value: config.props.value,
				page: config.request.page,
				pageSize: config.request.pageSize,
				keyword: config.request.keyword
			},
			formData: {}
		}
	},
	computed: {

	},
	watch: {
		modelValue:{
			handler(){
				this.defaultValue = this.modelValue
				this.autoCurrentLabel()
			},
			deep: true,
			immediate: true
		}
	},
	mounted() {
		this.defaultProps = Object.assign(this.defaultProps, this.props);
		this.defaultValue =  this.modelValue
		this.autoCurrentLabel()
	},
	methods: {
		//表格显示隐藏回调
		visibleChange(visible){
			if(visible){
				this.currentPage = 1
				this.keyword = null
				this.formData = {}
				this.getData()
			}else{
				this.autoCurrentLabel()
			}
		},
		//获取表格数据
		async getData(){
			this.loading = true;
			var reqData = {
				[this.defaultProps.page]: this.currentPage,
				[this.defaultProps.pageSize]: this.pageSize,
				[this.defaultProps.keyword]: this.keyword
			}
			Object.assign(reqData, this.params, this.formData)
			var res = await this.apiObj.get(reqData);
			var parseData = config.parseData(res)
			this.tableData = parseData.rows;
			this.total = parseData.total;
			this.loading = false;
			this.$nextTick(() => {
				if(this.multiple){
					this.defaultValue.forEach(row => {
						var setrow = this.tableData.filter(item => item[this.defaultProps.value]===row[this.defaultProps.value] )
						if(setrow.length > 0){
							this.$refs.table.toggleRowSelection(setrow[0], true);
						}
					})
				}else{
					var setrow = this.tableData.filter(item => item[this.defaultProps.value]===this.defaultValue[this.defaultProps.value] )
					this.$refs.table.setCurrentRow(setrow[0]);
				}
				this.$refs.table.setScrollTop(0)
			})
		},
		//插糟表单提交
		formSubmit(){
			this.currentPage = 1
			this.keyword = null
			this.getData()
		},
		//分页刷新表格
		reload(){
			this.getData()
		},
		//自动模拟options赋值
		autoCurrentLabel(){
			this.$nextTick(() => {
				if(this.multiple){
					this.defaultValue.map(item => {
						this.defaultLable.push(item[this.props.label])
					})
				}else{
					this.defaultLable = this.defaultValue[this.defaultProps.label]
				}
			})
		},
		//表格勾选事件
		select(rows, row){
			var isSelect = rows.length && rows.indexOf(row) !== -1
			if(isSelect){
				this.defaultValue.push(row)
			}else{
				this.defaultValue.splice(this.defaultValue.findIndex(item => item[this.defaultProps.value] == row[this.defaultProps.value]), 1)
			}
			this.autoCurrentLabel()
			this.$emit('update:modelValue', this.defaultValue);
			this.$emit('change', this.defaultValue);
		},
		//表格全选事件
		selectAll(rows){
			var isAllSelect = rows.length > 0
			if(isAllSelect){
				rows.forEach(row => {
					var isHas = this.defaultValue.find(item => item[this.defaultProps.value] == row[this.defaultProps.value])
					if(!isHas){
						this.defaultValue.push(row)
					}
				})
			}else{
				this.tableData.forEach(row => {
					var isHas = this.defaultValue.find(item => item[this.defaultProps.value] == row[this.defaultProps.value])
					if(isHas){
						this.defaultValue.splice(this.defaultValue.findIndex(item => item[this.defaultProps.value] == row[this.defaultProps.value]), 1)
					}
				})
			}
			this.autoCurrentLabel()
			this.$emit('update:modelValue', this.defaultValue);
			this.$emit('change', this.defaultValue);
		},
		click(row){
			if(this.multiple){
				//处理多选点击行
			}else{
				this.defaultValue = row
				this.$refs.select.blur()
				this.autoCurrentLabel()
				this.$emit('update:modelValue', this.defaultValue);
				this.$emit('change', this.defaultValue);
			}
		},
		//tags删除后回调
		removeTag(tag){
			var row = this.findRowByKey(tag[this.defaultProps.value])
			this.$refs.table.toggleRowSelection(row, false);
			this.$emit('update:modelValue', this.defaultValue);
		},
		//清空后的回调
		clear(){
			this.$emit('update:modelValue', this.defaultValue);
		},
		// 关键值查询表格数据行
		findRowByKey (value) {
			return this.tableData.find(item => item[this.defaultProps.value] === value)
		},
		filterMethod(keyword){
			if(!keyword){
				this.keyword = null;
				return false;
			}
			this.keyword = keyword;
			this.getData()
		},
		// 触发select隐藏
		blur(){
			this.$refs.select.blur();
		},
		// 触发select显示
		focus(){
			this.$refs.select.focus();
		}
	}
}
</script>

<style scoped>
</style>
