<template>
		<view class="u-wrap">
			<view class="search-warp" v-if="showAction">
				<scroll-view scroll-y :style="{'height': scrollHeight+'px'}" class="item-container">
					<view class="thumb-box" v-for="(item, index) in searchList" :key="index" @click="selval(item)">
						<view :class="[value==item[valueName]? 'item-active' : '']">
							<text>{{item.pname}}-{{item[labelName]}}</text>
						</view>
						
					</view>
				</scroll-view>
			</view>
			<view class="u-menu-wrap">
				<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
					<view v-for="(item,index) in list" :key="index" class="u-tab-item"
						:class="[current==index ? 'u-tab-item-active' : '']" :data-current="index"
						@tap.stop="swichMenu(index)">
						<text class="u-line-2">{{item[labelName]}}</text>
					</view>
				</scroll-view>
				<block v-for="(item,index) in list" :key="index">
					<scroll-view scroll-y class="right-box" v-if="current==index">
						<view class="page-view">
							<view class="class-item">
								<view class="item-container">
									<view class="thumb-box" v-for="(item1, index1) in item.childLklMccList" :key="index1"
										@click="selval(item1)">
										<view :class="[value==item1[valueName] ? 'item-active' : '']">
											<text>{{item1[labelName]}}</text>
										</view>
										<!-- <u-icon v-if="value==item1[valueName]" name="checkbox-mark" :color="iconColor"
											size="28">
										</u-icon> -->
									</view>
								</view>
							</view>
						</view>
					</scroll-view>
				</block>
			</view>
		</view>
</template>

<script>
	export default {
		name: 'macclist',
		props: {
			//label展示字段
			labelName: {
				type: String,
				default: 'name'
			},
			//value选中字段
			valueName: {
				type: String,
				default: 'id'
			},
			//初始选中值
			selectValue: {
				type: Number,
				default: 0
			},
			//选择数据
			listData: {
				type: Array,
				default: () => {
					return [];
				}
			}
		},
		data() {
			return {
				list: JSON.parse(JSON.stringify(this.listData)),
				scrollTop: 0, //tab标题的滚动条位置
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				value: this.selectValue,
				keyword: '',
				iconColor: 'primary',
				showAction: false,
				searchList: [],
				scrollHeight: 500
			}
		},
		watch: {
			listData: {
				handler(newName, oldName) {
					this.list = JSON.parse(JSON.stringify(newName))
				},
				deep: true,
			}
		},
		created() {
			var that = this;
			uni.getSystemInfo({
				success: function(res) {
					let windowHeight = res.windowHeight;
					let windowWidth = res.windowWidth;
					//#ifdef H5
					let headHeight = 110 / 750 * windowWidth;
					//#endif
					//#ifndef H5
					let headHeight = 200 / 750 * windowWidth;
					//#endif
					let scrollHeight = (windowHeight - headHeight);
					that.scrollHeight = scrollHeight;

				}
			});
		},
		methods: {
			selval(item) {
				this.value = item[this.valueName];
				this.keyword = '';
				this.showAction = false;
				this.$emit('confirem', item);
			},
			// 点击左边的栏目切换
			async swichMenu(index) {
				if (index == this.current) return;
				this.current = index;
				// 如果为0，意味着尚未初始化
				if (this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({
						size: true
					}, res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if (!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return;
						}
						this[dataVal] = res.height;
					}).exec();
				})
			},
			focus() {
				this.showAction = true;
			},
			cancle() {
				this.showAction = false;
				this.keyword = '';
			},
			toSearch() {
				let arr = [];
				this.list.map((item, index) => {
					item.children.map((it, ix) => {
						if (it[this.labelName].indexOf(this.keyword) >= 0) {
							it['pname'] = item[this.labelName];
							arr.push(it);
						}
					})
				})
				this.searchList = arr;
			}
		}
	}
</script>

<style lang="scss" scoped>
	.u-wrap {
		height: 100%;
		width: 100%;
		display: flex;
		flex-direction: column;
		position: relative;
		overflow: hidden;
		.head {
			display: flex;
			flex-direction: row;
			align-items: center;
			justify-content: space-between;
			height: 100rpx;
			padding: 0 20rpx;
			background-color: white;
		}
	}

	.u-search-box {
		padding: 0rpx 30rpx;
		background-color: white;
		display: flex;
		flex-direction: row;
		align-items: center;
		height: 100rpx;
		width: 100%;
	}

	.search-warp {
		display: flex;
		overflow: hidden;
		background-color: #FFFFFF;
		position: absolute;
		z-index: 10;
		top: 200rpx;
		left: 0;
		width: 100%;
	}

	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
		background-color: #F8F8F8;
	}

	.u-tab-view {
		width: 300rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 100rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		font-size: 26rpx;
		padding: 0 20rpx;
		color: #444;
		font-weight: 400;
	}

	.u-tab-item-active {
		position: relative;
		color: #333333;
		font-size: 28rpx;
		font-weight: 600;
		background: #fff;
	}

	.u-tab-item-active::before {
		content: "";
		position: absolute;
		border-left: 4px solid #ed6853;
		height: 32rpx;
		left: 0;
		top: 39rpx;
	}

	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: white;
	}

	.page-view {
		background-color: white;
	}

	.class-item {
		background-color: #fff;
		border-radius: 8rpx;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: #007AFF;
	}

	.item-container {
		display: flex;
		flex-direction: column;
		flex: 1;
	}

	.item-active {
		color: #ed6853;
	}

	.thumb-box {
		display: flex;
		flex-direction: row;
		justify-content: space-between;
		height: 100rpx;
		width: 100%;
		padding: 0 20rpx;
		align-items: center;
		font-size: 30rpx;
		color: #999999;
	}
</style>
