<!--
 * @Descripttion: 表单表格
 * @version: 1.3
 * @Author: sakuya
 * @Date: 2023年2月9日12:32:26
 * @LastEditors: sakuya
 * @LastEditTime: 2023年2月17日10:41:47
-->

<template>
	<div class="sc-form-table" ref="scFormTable">
		<el-table :data="data" row-key="id" highlight-current-row ref="table" border :height="tableHeight" @select="select" @select-all="selectAll">
			<el-table-column v-if="canMultiple" type="selection" width="45"></el-table-column>
			<el-table-column type="index" width="50" fixed="left">
				<template #header>
					<el-button v-if="!hideAdd" type="primary" icon="el-icon-plus" size="small" circle @click="rowAdd"></el-button>
				</template>
				<template #default="scope">
					<div :class="['sc-form-table-handle', {'sc-form-table-handle-delete':!hideDelete}]">
						<span v-if="!hideIndex">{{scope.$index + 1}}</span>
						<el-button v-if="!hideDelete" type="danger" icon="el-icon-delete" size="small" plain circle @click="rowDel(scope.row, scope.$index)"></el-button>
					</div>
				</template>
			</el-table-column>
			<el-table-column label="" width="50" v-if="dragSort">
				<template #default>
					<div class="move" style="cursor: move;"><el-icon-d-caret style="width: 1em; height: 1em;"/></div>
				</template>
			</el-table-column>
			<slot></slot>
			<template #empty>
				{{placeholder}}
			</template>
		</el-table>
	</div>
</template>

<script>
	import Sortable from 'sortablejs'

	export default {
		props: {
			tableHeight:{
				type: [Number, String],
				default: 300
			},
			modelValue: { type: Array, default: () => [] },
			addTemplate: { type: Object, default: () => {} },
			placeholder: { type: String, default: "暂无数据" },
			dragSort: { type: Boolean, default: false },
			hideAdd: { type: Boolean, default: false },
			hideDelete: { type: Boolean, default: false },
			hideIndex: { type: Boolean, default: false },
			canMultiple: { type: Boolean, default: false },
			pushType: { type: String, default: 'push' }
		},
		data(){
			return {
				data: [],
				defaultValue:[],
			}
		},
		mounted(){
			this.data = this.modelValue
			if(this.dragSort){
				this.rowDrop()
			}
		},
		watch:{
			modelValue(){
				this.data = this.modelValue
			},
			data: {
				handler(){
					this.$emit('update:modelValue', this.data);
				},
				deep: true
			}
		},
		methods: {
			rowDrop(){
				const _this = this
				const tbody = this.$refs.table.$el.querySelector('.el-table__body-wrapper tbody')
				Sortable.create(tbody, {
					handle: ".move",
					animation: 300,
					ghostClass: "ghost",
					onEnd({ newIndex, oldIndex }) {
						_this.data.splice(newIndex, 0, _this.data.splice(oldIndex, 1)[0])
						const newArray = _this.data.slice(0)
						const tmpHeight = _this.$refs.scFormTable.offsetHeight
						_this.$refs.scFormTable.style.setProperty('height', tmpHeight + 'px')
						_this.data = []
						_this.$nextTick(() => {
							_this.data = newArray
							_this.$nextTick(() => {
								_this.$refs.scFormTable.style.removeProperty('height')
							})

						})
					}
				})
			},
			rowAdd(){
				const temp = JSON.parse(JSON.stringify(this.addTemplate));
				if(this.pushType == 'unshift'){
					this.data.unshift(temp);
				}else{
					this.data.push(temp);
				}
				this.$emit('add', temp)
			},
			rowDel(row, index){
				this.data.splice(index, 1)
			},
			//插入行
			pushRow(row){
				const temp = row || JSON.parse(JSON.stringify(this.addTemplate))
				this.data.push(temp)
			},
			//根据index删除
			deleteRow(index){
				this.data.splice(index, 1)
			},
			//表格勾选事件
			select(rows, row){
				var isSelect = rows.length && rows.indexOf(row) !== -1;
				if(isSelect){//被选中
					if(this.defaultValue.indexOf(row) == -1){
						this.defaultValue.push(row)
					}
				}else{//被取消
					if(this.defaultValue.indexOf(row) !== -1){
						this.defaultValue.splice(this.defaultValue.findIndex(item => item.id == row.id), 1)
					}
				} 
				this.$emit('selectChange', 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.id == row.id)
						if(!isHas){
							this.defaultValue.push(row)
						}
					})
				}else{
					this.defaultValue = [];
				}
				this.$emit('selectAllChange', this.defaultValue);
			},
			clearSelection(){
			    let that = this;
				that.defaultValue = [];
				this.$emit('selectChange', this.defaultValue);
			},
			setCurrentRows(row){
				let that = this;
				that.$nextTick(() => {
					that.$refs.table.toggleRowSelection(row, true); 
					that.defaultValue.push(row)
					this.$emit('selectChange', this.defaultValue);
				})
				
			},
		},
	}
</script>

<style scoped>
	.sc-form-table {width: 100%;}
	.sc-form-table .sc-form-table-handle {text-align: center;}
	.sc-form-table .sc-form-table-handle span {display: inline-block;}
	.sc-form-table .sc-form-table-handle button {display: none;}
	.sc-form-table .hover-row .sc-form-table-handle-delete span {display: none;}
	.sc-form-table .hover-row .sc-form-table-handle-delete button {display: inline-block;}
	.sc-form-table .move {text-align: center;font-size: 14px;margin-top: 3px;}
</style>
