<template>
<el-container>
	<el-aside width="300px" v-loading="menuloading">
		<el-container>
			<el-header>
				<el-input placeholder="输入关键字进行过滤" v-model="menuFilterText" clearable></el-input>
			</el-header>
			<el-main class="nopadding">
				<el-tree ref="menu" class="menu" node-key="id" :data="menuList" :props="menuProps" draggable highlight-current :expand-on-click-node="false" check-strictly show-checkbox :filter-node-method="menuFilterNode" @node-click="menuClick" @node-drop="nodeDrop">

					<template #default="{node, data}">
						<span class="custom-tree-node el-tree-node__label">
							<span class="label">
								{{ node.label }}
							</span>
							<span class="do">
								<el-icon @click.stop="add(node, data)"><el-icon-plus /></el-icon>
							</span>
						</span>
					</template>

				</el-tree>
			</el-main>
			<el-footer style="height:51px;">
				<el-button type="primary" size="small" icon="el-icon-plus" @click="add()"></el-button>
				<el-button type="danger" size="small" plain icon="el-icon-delete" @click="delMenu"></el-button>
			</el-footer>
		</el-container>
	</el-aside>
	<el-container>
		<el-main class="nopadding" style="padding:20px;" ref="main">
			<save ref="save" :menu="menuList"></save>
		</el-main>
	</el-container>
</el-container>
</template>

<script>
let newMenuIndex = 1;
import save from './save'

export default {
	name: "settingMenu",
	components: {
		save
	},
	data(){
		return {
			menuloading: false,
			menuList: [],
			menuProps: {
				label: (data)=>{
					return data.title
				}
			},
			menuFilterText: ""
		}
	},
	watch: {
		menuFilterText(val){
			this.$refs.menu.filter(val);
		}
	},
	mounted() {
		this.getMenu();
	},
	methods: {
		//加载树数据
		async getMenu(){
			this.menuloading = true
			var res = await this.$API.system.menu.list.get();
			this.menuloading = false
			this.menuList = res.data;
		},
		//树点击
		menuClick(data, node){
			var pid = node.level==1?undefined:node.parent.data.id;
			this.$refs.save.setData(data, pid)
			this.$refs.main.$el.scrollTop = 0
		},
		//树过滤
		menuFilterNode(value, data){
			if (!value) return true;
			var targetText = data.meta.title;
			return targetText.indexOf(value) !== -1;
		},
		//树拖拽
		nodeDrop(draggingNode, dropNode, dropType){
			this.$refs.save.setData({})
			this.$message(`拖拽对象：${draggingNode.data.meta.title}, 释放对象：${dropNode.data.meta.title}, 释放对象的位置：${dropType}`)
		},
		//增加
		async add(node, data){
			var newMenuName = "新菜单" + newMenuIndex++;
			var newMenuData = {
				parent_id: data ? data.id : "",
				name: newMenuName,
				path: "",
				component: "",
				title: newMenuName,
				type: "menu",
				sort: 0
			}
			this.menuloading = true
			var res = await this.$API.system.menu.add.post(newMenuData)
			this.menuloading = false
			newMenuData.id = res.data.id

			this.$refs.menu.append(newMenuData, node)
			this.$refs.menu.setCurrentKey(newMenuData.id)
			var pid = node ? node.data.id : ""
			this.$refs.save.setData(newMenuData, pid)
		},
		//删除菜单
		async delMenu(){
			var CheckedNodes = this.$refs.menu.getCheckedNodes()
			if(CheckedNodes.length == 0){
				this.$message.warning("请选择需要删除的项")
				return false;
			}

			var confirm = await this.$confirm('确认删除已选择的菜单吗？','提示', {
				type: 'warning',
				confirmButtonText: '删除',
				confirmButtonClass: 'el-button--danger'
			}).catch(() => {})
			if(confirm != 'confirm'){
				return false
			}

			this.menuloading = true
			var reqData = {
				ids: CheckedNodes.map(item => item.id)
			}
			var res = await this.$API.system.menu.delete.post(reqData)
			this.menuloading = false

			if(res.code == 1){
				CheckedNodes.forEach(item => {
					var node = this.$refs.menu.getNode(item)
					if(node.isCurrent){
						this.$refs.save.setData({})
					}
					this.$refs.menu.remove(item)
				})
			}else{
				this.$message.warning(res.msg)
			}
		}
	}
}
</script>

<style scoped>
.custom-tree-node {display: flex;flex: 1;align-items: center;justify-content: space-between;font-size: 14px;padding-right: 24px;height:100%;}
.custom-tree-node .label {display: flex;align-items: center;;height: 100%;}
.custom-tree-node .label .el-tag {margin-left: 5px;}
.custom-tree-node .do {display: none;}
.custom-tree-node .do i {margin-left:5px;color: #999;}
.custom-tree-node .do i:hover {color: #333;}

.custom-tree-node:hover .do {display: inline-block;}
</style>
