<template name="aui-picker">
	<view class="aui-picker" v-if="SHOW" :class="{
		'aui-picker-in': FADE==1,
		'aui-picker-out': FADE==0}">

		<view class="aui-picker-main">
			<view class="aui-mask" @click.stop="close"></view>
			<view class="aui-picker-header">
				<view @click.stop="close" class="aui-picker-close">取消</view>
				<view class="aui-picker-title" v-if="title">{{title}}</view>
				<!-- <view class="aui-picker-close iconfont iconclose" ></view> -->
				<!-- <view class="aui-picker-sure" @click.stop="getSure" v-if="titflag">确定</view> -->
				<view class="aui-picker-sure" @click.stop="getSure">确定</view>
			</view>
			<view class="aui-picker-nav">
				<view class="aui-picker-navitem" v-if="nav.length>0" v-for="(item, index) in nav" :key="index"
					:data-index="index" :class="[index==navCurrentIndex ? 'active' : '', 'aui-picker-navitem-'+index]"
					@click.stop="_changeNav($event)">{{item.label}}</view>
				<!-- :style="{margin: nav.length>2 ? '0 10px 0 0' : '0 30px 0 0'}" -->
				<view class="aui-picker-navitem" :key="nav.length" :data-index="nav.length"
					:class="[nav.length==navCurrentIndex ? 'active' : '', 'aui-picker-navitem-'+nav.length]"
					@click.stop="_changeNav($event)">请选择</view>
				<!-- :style="{margin: nav.length>2 ? '0 10px 0 0' : '0 30px 0 0'}" -->
				<view class="aui-picker-navborder" :style="{left: navBorderLeft+'px'}"></view>
			</view>
			<view class="aui-picker-content">
				<view class="aui-picker-lists">
					<view class="aui-picker-list" v-for="(list, index) in queryItems.length + 1" :key="index"
						:data-index="index" :class="[index==navCurrentIndex ? 'active' : '']">
						<view class="aui-picker-list-warp" v-if="index == 0">
							<view class="aui-picker-item" v-for="(item, key) in items" :key="key" :data-pindex="index"
								:data-index="key" :data-id="item.id" :data-label="item.label"
								:class="{'active': result.length>index && result[index].id==item.id}"
								:style="{'background': touchConfig.index==key && touchConfig.pindex==index ? touchConfig.style.background : ''}"
								@click.stop="_chooseItem($event)" @touchstart="_btnTouchStart($event)"
								@touchmove="_btnTouchEnd($event)" @touchend="_btnTouchEnd($event)">{{item.label}}</view>
						</view>
						<view class="aui-picker-list-warp" v-else>
							<view class="aui-picker-item" v-for="(item, key) in queryItems[index-1]" :key="key"
								:data-pindex="index" :data-index="key" :data-id="item.id" :data-label="item.label"
								:class="{'active': result.length>index && result[index].id==item.id}"
								:style="{'background': touchConfig.index==key && touchConfig.pindex==index ? touchConfig.style.background : ''}"
								@click.stop="_chooseItem($event)" @touchstart="_btnTouchStart($event)"
								@touchmove="_btnTouchEnd($event)" @touchend="_btnTouchEnd($event)">{{item.label}}</view>
						</view>
					</view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		label: 'aui-picker',
		props: {
			title: { //标题
				type: String,
				default: ''
			},
			titflag: {
				type: Boolean,
				default: false,
			},
			layer: { //控制几级联动,默认无限级(跟随数据有无下级)
				type: Number,
				default: null
			},
			data: { //数据 如：[{id: '', label: '', children: [{id: '', label: ''}]}]
				type: Array,
				default () {
					return [
						// [{id: '', label: '', children: [{id: '', label: ''}]}]
					]
				}
			}
		},
		data() {
			return {
				SHOW: false,
				FADE: -1,
				nav: [],
				items: [],
				queryItems: [],
				navCurrentIndex: 0,
				navBorderLeft: 25,
				result: [],
				touchConfig: {
					index: -1,
					pindex: -1,
					style: {
						color: '#197DE0',
						background: '#EFEFEF'
					}
				},
				loadflag: false
			}
		},
		created() {
			const _this = this;
		},
		watch: {
			data() {

				const _this = this;
				const data = _this.data;
				// _this.items = _this._flatten(data, '0')
				_this.items = data
			}
		},
		mounted() {
		},
		methods: {
			// 打开
			open(e) {
				const _this = this;
				if (e == 1) {
					_this.reset(); //打开时重置picker
				}

				return new Promise(function(resolve, reject) {
					_this.SHOW = true;
					_this.FADE = 1;
					resolve();
				});
			},
			// 关闭
			close() {
				const _this = this;
				return new Promise(function(resolve, reject) {
					_this.FADE = 0;
					const _hidetimer = setTimeout(() => {
						_this.SHOW = false;
						_this.FADE = -1;
						clearTimeout(_hidetimer);
						resolve();
					}, 100)
				});
			},
			//重置
			reset() {
				const _this = this;
				_this.queryItems = [];
				_this.nav = [];
				_this.navBorderLeft = 25;
				_this.navCurrentIndex = 0;
				_this.result = [];
			},
			//导航栏切换
			_changeNav(e) {
				const _this = this;
				const index = Number(e.currentTarget.dataset.index);
				_this.navCurrentIndex = index;
				const _el = uni.createSelectorQuery().in(this).select(".aui-picker-navitem-" + index);
				_el.boundingClientRect(data => {
					_this.navBorderLeft = data.left + 15;
				}).exec();
			},
			//数据选择
			_chooseItem(e) {
				// 加载的时候禁止点击
				// if (this.loadflag) {
				// 	return
				// }
				// this.loadflag = true;
				const _this = this;
				const id = e.currentTarget.dataset.id;
				const label = e.currentTarget.dataset.label;
				// const deptId = e.currentTarget.dataset.deptId;
				const _arr = [];
				// 获取新数据
				// _this.result[_this.navCurrentIndex] = {id: id, label: label, deptId: deptId};
				// _this.$http.post('boman-system/chinaArea/treeSelect',{deptId: id}).then(res=>{
				// 	this.loadflag=false;
				// 	if(res.data.length>0){
				// 		if(_this.navCurrentIndex == _this.queryItems.length)
				// 		{ //选择数据
				// 			_this.queryItems.push(res.data);
				// 			_this.nav.push({label: label});
				// 		}
				// 		else
				// 		{ //重新选择数据
				// 			_this.queryItems.splice(_this.navCurrentIndex+1);
				// 			_this.nav.splice(_this.navCurrentIndex+1);
				// 			_this.queryItems.splice(_this.navCurrentIndex, 1, res.data);
				// 			_this.nav.splice(_this.navCurrentIndex, 1, {label: label});
				// 			//清空后面的选择
				// 			_this.result.splice(Number(_this.navCurrentIndex+1))
				// 		}
				// 		_this.navCurrentIndex = _this.navCurrentIndex + 1;
				// 		const _el = uni.createSelectorQuery().in(this).select(".aui-picker-navitem-"+_this.navCurrentIndex);
				// 		setTimeout(()=>{
				// 			_el.boundingClientRect(data => {
				// 				_this.navBorderLeft = data.left + 15;
				// 			}).exec();
				// 		},100)
				// 	}else{
				// 		//无下级数据
				// 		_this.close().then(()=>{
				// 			_this.$emit("callback", {status: 0, data: _this.result});
				// 		});
				// 	}
				// })
				
				_this.result.splice(Number(_this.navCurrentIndex+1))
				_this.result[_this.navCurrentIndex] = {
					id: id,
					label: label,
				};
				// console.log(id)
				// console.log(_this._deepQuery(_this.data, id),7)
				if (
					(!_this._isDefine(_this.layer) && _this._isDefine(_this._deepQuery(_this.data, id).children)) ||
					(_this.navCurrentIndex < (Number(_this.layer) - 1) && _this._isDefine(_this._deepQuery(_this.data, id).children))
				) { //有下级数据
					_this._deepQuery(_this.data, id).children.forEach(function(item, index) {
						_arr.push({
							id: item.id,
							label: item.label,
						});
					});
					if (_this.navCurrentIndex == _this.queryItems.length) { //选择数据
						_this.queryItems.push(_arr);
						_this.nav.push({
							label: label
						});
					} else { //重新选择数据
						_this.queryItems.splice(_this.navCurrentIndex + 1, 1);
						_this.nav.splice(_this.navCurrentIndex + 1, 1);
						_this.queryItems.splice(_this.navCurrentIndex, 1, _arr);
						_this.nav.splice(_this.navCurrentIndex, 1, {
							label: label
						});
					}
					_this.navCurrentIndex = _this.navCurrentIndex + 1;
					const _el = uni.createSelectorQuery().in(this).select(".aui-picker-navitem-" + _this.navCurrentIndex);
					setTimeout(() => {
						_el.boundingClientRect(data => {
							_this.navBorderLeft = data.left + 20;
						}).exec();
					}, 100)
				} else { //无下级数据
					_this.close().then(() => {
						_this.$emit("callback", {
							status: 0,
							data: _this.result
						});
					});
				}
			},
			getSure() {
				this.close().then(() => {
					this.$emit("callback", {
						status: 0,
						data: this.result
					});
				});
			},
			//递归遍历——将树形结构数据转化为数组格式
			_flatten(tree, deptId) {
				return tree.reduce((arr, {
						id,
						label,
						children = []
					}) =>
					arr.concat([{
						id,
						label,
					}], this._flatten(id)), [])
			},
			//根据id查询对应的数据(如查询id=10100对应的对象)
			_deepQuery(tree, id) {
				let isGet = false;
				let retNode = null;
				function deepSearch(tree, id) {
					for (let i = 0; i < tree.length; i++) {
						if (tree[i].children && tree[i].children.length > 0) {
							deepSearch(tree[i].children, id);
						}
						if (id == tree[i].id || isGet) {
							isGet || (retNode = tree[i]);
							isGet = true;
							break;
						}
					}
				}
				deepSearch(tree, id);
				return retNode;
			},
			/***判断字符串是否为空
			   @param {string} str 变量
			   @example: aui.isDefine("变量");
			*/
			_isDefine(str) {
				if (str == null || str == "" || str == "undefined" || str == undefined || str == "null" || str ==
					"(null)" || str == 'NULL' || typeof(str) == 'undefined') {
					return false;
				} else {
					str = str + "";
					str = str.replace(/\s/g, "");
					if (str == "") {
						return false;
					}
					return true;
				}
			},
			_btnTouchStart(e) {
				const _this = this,
					index = Number(e.currentTarget.dataset.index),
					pindex = Number(e.currentTarget.dataset.pindex);
				_this.touchConfig.index = index;
				_this.touchConfig.pindex = pindex;
			},
			_btnTouchEnd(e) {
				const _this = this,
					index = Number(e.currentTarget.dataset.index),
					pindex = Number(e.currentTarget.dataset.pindex);
				_this.touchConfig.index = -1;
				_this.touchConfig.pindex = -1;
			},
		}
	}
</script>

<style scoped>
	/* ====================
		多级联动弹窗
	 =====================*/
	.aui-picker {
		width: 100vw;
		height: 100vh;
		/* opacity: 0;		 */
		position: fixed;
		top: 0;
		left: 0;
		z-index: 1200;
		background: rgba(0, 0, 0, 0.5);
		/* display: none; */
	}

	.aui-picker.aui-picker-in {
		-moz-animation: aui-fade-in .1s ease-out forwards;
		-ms-animation: aui-fade-in .1s ease-out forwards;
		-webkit-animation: aui-fade-in .1s ease-out forwards;
		animation: aui-fade-in .1s ease-out forwards;
	}

	.aui-picker.aui-picker-out {
		-moz-animation: aui-fade-out .1s ease-out forwards;
		-ms-animation: aui-fade-out .1s ease-out forwards;
		-webkit-animation: aui-fade-out .1s ease-out forwards;
		animation: aui-fade-out .1s ease-out forwards;
	}

	.aui-picker-main {
		width: 100vw;
		height: 50vh;
		background: #FFF;
		border-radius: 15px 15px 0 0;
		position: absolute;
		left: 0px;
		/* bottom: -50vh;		 */
		bottom: 0vh;
		z-index: 999;
	}

	.aui-picker.aui-picker-in .aui-picker-main {
		-moz-animation: aui-slide-up-screen .2s ease-out forwards;
		-ms-animation: aui-slide-up-screen .2s ease-out forwards;
		-webkit-animation: aui-slide-up-screen .2s ease-out forwards;
		animation: aui-slide-up-screen .2s ease-out forwards;
	}

	.aui-picker.aui-picker-out .aui-picker-main {
		-moz-animation: aui-slide-down-screen .2s ease-out forwards;
		-ms-animation: aui-slide-down-screen .2s ease-out forwards;
		-webkit-animation: aui-slide-down-screen .2s ease-out forwards;
		animation: aui-slide-down-screen .2s ease-out forwards;
	}

	.aui-picker-header {
		width: 100%;
		height: 50px;
		position: relative;
		z-index: 999;
		background: #F2F2F2;
		border-radius: 15px 15px 0 0;
		display: flex;
		align-items: center;
	}

	.aui-picker-header::after {
		content: '';
		width: 100%;
		height: 1px;
		background: rgba(100, 100, 100, .3);
		-moz-transform: scaleY(.3);
		-ms-transform: scaleY(.3);
		-webkit-transform: scaleY(.3);
		transform: scaleY(.3);
		position: absolute;
		left: 0;
		bottom: 0;
		z-index: 999;
	}

	.aui-picker-title {
		line-height: 20px;
		text-align: center;
		font-size: 17px;
		color: #333;
		padding: 15px;
		box-sizing: border-box;
		flex: 1;
		text-align: center;
		/* position: absolute;
		left: 50px;
		right: 50px;
		top: 0; */
	}

	.aui-picker-close {
		font-size: 15px;
		color: #333333;
		flex: 0 0 auto;
		height: 50px;
		width: 60px;
		text-align: center;
		line-height: 50px;
	}

	.aui-picker-sure {
		flex: 0 0 auto;
		font-size: 15px;
		color: #197DE0;
		height: 50px;
		width: 60px;
		text-align: center;
		line-height: 50px;
	}

	/* .aui-picker-close.iconfont{
		width: 50px;
		height: 50px;
		line-height: 50px;
		text-align: center;
		font-size: 20px;
		color: #aaa;
		border-radius: 0 10px 0 0;
		position: absolute;
		right: 0;
		top: 0;
	} */
	.aui-picker-content {
		width: 100%;
		height: -webkit-calc(100% - 100px);
		height: calc(100% - 100px);
	}

	.aui-picker-nav {
		width: 100%;
		height: 50px;
		text-align: left;
		padding: 0 20rpx;
		margin: 0 0 1px 0;
		justify-content: flex-start;
		white-space: nowrap;
		box-sizing: border-box;
		position: relative;
		display: flex;
		align-items: center;
	}

	.aui-picker-nav::after {
		content: '';
		width: 100%;
		height: 1px;
		background: rgba(100, 100, 100, .3);
		-moz-transform: scaleY(.3);
		-ms-transform: scaleY(.3);
		-webkit-transform: scaleY(.3);
		transform: scaleY(.3);
		position: absolute;
		left: 0;
		bottom: 0;
		z-index: 999;
	}

	.aui-picker-navitem {
		flex: 1;
		max-width: 70px;
		/* width: 80px; */
		line-height: 50px;
		font-size: 16px;

		text-align: center;
		display: inline-block;
		overflow: hidden;
		white-space: nowrap;
		text-overflow: ellipsis;
	}

	.aui-picker-navitem.active {
		color: #197DE0;
	}

	.aui-picker-navborder {
		width: 40px;
		height: 3px;
		background: #197DE0;
		border-radius: 5px;
		transition: left .15s;
		position: absolute;
		left: 25px;
		bottom: 0;
	}

	.aui-picker-lists {
		width: 100%;
		height: 100%;
		justify-content: space-around;
		white-space: nowrap;
	}

	.aui-picker-list {
		width: 100%;
		height: 100%;
		overflow: hidden;
		overflow-y: scroll;
		display: none;
		vertical-align: top;
	}

	.aui-picker-list.active {
		display: inline-block;
	}

	.aui-picker-list-warp {
		width: 100%;
		height: auto;
		box-sizing: border-box;
		padding: 15px 0;
		display: inline-block;
	}

	.aui-picker-item {
		width: 100%;
		height: 50px;
		line-height: 50px;
		padding: 0 15px;
		box-sizing: border-box;
		font-size: 15px;
		color: #333;
		position: relative;
	}

	.aui-picker-item.active {
		color: #197DE0;
	}

	.aui-picker-item.active::after {
		content: '✔';
		font-size: 15px;
		color: #197DE0;
		position: absolute;
		top: 0px;
		right: 10px;
	}
</style>