<template>
	<view class="ticket-order-page">
		<view class="status_bar" :style="navHeight"></view>
		<view class="tabs">
			<view class="empty"></view>
			<swiper
				ref="swiper1"
				disable-touch="true"
				class="tab-box"
				:current="tabIndex"
				:duration="300"
				@change="onswiperchange"
				@transition="onswiperscroll"
				@animationfinish="animationfinish"
				@onAnimationEnd="animationfinish"
			>
				<swiper-item class="swiper-item" v-for="(page, index) in tabList" :key="index">
					<orderPage :ref="'page' + index" class="page-item"></orderPage>
				</swiper-item>
			</swiper>
		</view>
	</view>
</template>

<script>
import { mapState } from 'vuex';

import { timeRangeFormat } from '@/utils/date.js';

// #ifdef APP-PLUS
const dom = weex.requireModule('dom');
// #endif

import orderPage from './order-page.nvue';

// 缓存每页最多
const MAX_CACHE_DATA = 100;
// 缓存页签数量
const MAX_CACHE_PAGE = 3;
const TAB_PRELOAD_OFFSET = 1;

export default {
	components: {
		orderPage
	},
	data() {
		return {
			tabList: [
				{
					id: 'tab01',
					name: '全部',
					newsid: 0
				},
			],
			tabIndex: 0,
			cacheTab: [],
			scrollInto: '',
			navigateFlag: false,
			indicatorLineLeft: 0,
			indicatorLineWidth: 0,
			isTap: false,
			// 测试使用观察变化
			_lastTabIndex: 0,
			swiperWidth: 0,
			tabbarWidth: 0,
			tabListSize: {},
			_touchTabIndex: 0,
			ishowDetail: false
		};
	},
	computed: {
		underlineStyle() {
			return {
				left: this.indicatorLineLeft + 'px',
				width: this.indicatorLineWidth + 'px'
			};
		},
		navHeight() {
			return {
				height: `${this.sysinfo.safeArea.top + 44}px`
			};
		},
		conditionTop() {
			return {
				top: `${this.sysinfo.safeArea.top + 44 + 42}px`
			};
		},
		...mapState(['sysinfo'])
	},
	created() {},
	onReady() {
		this._lastTabIndex = 0;
		this.swiperWidth = 0;
		this.tabbarWidth = 0;
		this.tabListSize = {};
		this._touchTabIndex = 0;

		this.pageList = [];
		for (let i = 0; i < this.tabList.length; i++) {
			let item = this.$refs['page' + i];
			if (Array.isArray(item)) {
				this.pageList.push(item[0]);
			} else {
				this.pageList.push(item);
			}
		}
		this.switchTab(this.tabIndex);

		this.selectorQuery();
	},
	methods: {
		handleShowDetail() {
			this.ishowDetail = !this.ishowDetail;
		},
		clearData() {
			
		},
		search() {
			this.pageList && this.pageList[this.tabIndex].refreshData();
		},
		ontabtap(e, type) {
			let index = e.target.dataset.current || e.currentTarget.dataset.current;
			//let offsetIndex = this._touchTabIndex = Math.abs(index - this._lastTabIndex) > 1;

			// #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
			this.isTap = true;
			var currentSize = this.tabListSize[index];
			this.updateIndicator(currentSize.left, currentSize.width);
			this._touchTabIndex = index;
			// #endif
			this.switchTab(index);
		},
		onswiperchange(e) {
			// 注意：百度小程序会触发2次

			// #ifndef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
			let index = e.target.current || e.detail.current;
			this.switchTab(index);
			// #endif
		},
		onswiperscroll(e) {
			if (this.isTap) {
				return;
			}

			var offsetX = e.detail.dx;
			var preloadIndex = this._lastTabIndex;
			if (offsetX > TAB_PRELOAD_OFFSET) {
				preloadIndex++;
			} else if (offsetX < -TAB_PRELOAD_OFFSET) {
				preloadIndex--;
			}
			if (preloadIndex === this._lastTabIndex || preloadIndex < 0 || preloadIndex > this.pageList.length - 1) {
				return;
			}
			if (this.pageList[preloadIndex].dataList.length === 0) {
				this.loadTabData(preloadIndex);
			}

			// #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
			var percentage = Math.abs(this.swiperWidth / offsetX);
			var currentSize = this.tabListSize[this._lastTabIndex];
			var preloadSize = this.tabListSize[preloadIndex];
			var lineL = currentSize.left + (preloadSize.left - currentSize.left) / percentage;
			var lineW = currentSize.width + (preloadSize.width - currentSize.width) / percentage;
			this.updateIndicator(lineL, lineW);
			// #endif
		},
		animationfinish(e) {
			// #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
			// let index = e.detail.current;
			// if (this._touchTabIndex === index) {
			// 	this.isTap = false;
			// }
			// this._lastTabIndex = index;
			// this.switchTab(index);
			// this.updateIndicator(this.tabListSize[index].left, this.tabListSize[index].width);
			// #endif
		},
		selectorQuery() {
		},
		updateIndicator(left, width) {
			this.indicatorLineLeft = left;
			this.indicatorLineWidth = width;
		},
		switchTab(index) {
			if (this.pageList[index].dataList.length === 0) {
				this.loadTabData(index);
			}
			if (this.tabIndex === index) {
				return;
			}
			// 缓存 tabId
			if (this.pageList[this.tabIndex].dataList.length > MAX_CACHE_DATA) {
				let isExist = this.cacheTab.indexOf(this.tabIndex);
				if (isExist < 0) {
					this.cacheTab.push(this.tabIndex);
				}
			}
			this.tabIndex = index;

			// #ifdef APP-NVUE
			// this.scrollTabTo(index);
			// #endif

			// #ifndef APP-NVUE
			this.scrollInto = this.tabList[index].id;
			// #endif

			// 释放 tabId
			if (this.cacheTab.length > MAX_CACHE_PAGE) {
				let cacheIndex = this.cacheTab[0];
				this.clearTabData(cacheIndex);
				this.cacheTab.splice(0, 1);
			}
			this.clearData();
		},
		scrollTabTo(index) {
			const el = this.$refs['tabitem' + index][0];
			let offset = 0;
			// TODO fix ios offset
			if (index > 0) {
				offset = this.tabbarWidth / 2 - this.tabListSize[index].width / 2;
				if (this.tabListSize[index].right < this.tabbarWidth / 2) {
					offset = this.tabListSize[0].width;
				}
			}
			dom.scrollToElement(el, {
				offset: -offset
			});
		},
		loadTabData(index) {
			this.pageList[index].loadData();
		},
		clearTabData(index) {
			this.pageList[index].clear();
		}
	}
};
</script>

<style lang="scss" scoped>
.ticket-order-page {
	flex-direction: column;
	flex: 1;
}

/* #ifndef APP-PLUS */
page {
	width: 100%;
	min-height: 100%;
	display: flex;
	background: $background-color-1;
}

.status_bar {
	height: var(--status-bar-height);
}

/* #endif */

.tabs {
	flex: 1;
	flex-direction: column;
	overflow: hidden;
	background-color: #ffffff;
}

.tab-bar {
	width: 750rpx;
	height: 42px;
	flex-direction: row;
	/* #ifndef APP-PLUS */
	white-space: nowrap;
	/* #endif */
	border-bottom: 0.5px solid #eeeeee;
}

/* #ifndef APP-NVUE */
.tab-bar ::-webkit-scrollbar {
	display: none;
	width: 0 !important;
	height: 0 !important;
	-webkit-appearance: none;
	background: transparent;
}

/* #endif */

.tab-bar-list {
	flex-direction: column;
}

.tab-bar-list-wrapper {
	width: 750rpx;
	flex-direction: row;
}

.scroll-view-indicator {
	position: relative;
	height: 2px;
	border-radius: 1px;
	background-color: transparent;
}

.scroll-view-underline {
	position: absolute;
	top: 0;
	bottom: 0;
	width: 0;
	background-color: $tabbar-color;
}

.scroll-view-animation {
	transition-duration: 0.2s;
	transition-property: left;
}

.conditon-block {
	position: fixed;
	left: 0;
	top: 172rpx;
	right: 0;
	bottom: 0;
	z-index: 10;
	width: 750rpx;
	height: 124rpx;
	overflow: hidden;
	background-color: #fff;
	display: flex;
	flex-direction: column;
	padding: 40rpx 32rpx 0 16rpx;
}

.conditon-block-auto {
	height: 460rpx;
	overflow: auto;
	max-height: 230px;
}

.icon-arrow {
	width: 32rpx;
	height: 20rpx;
	margin-top: 24rpx;
	transition-property: transform;
	transition-duration: 0.15s;
	transform: rotate(0deg);
}

.icon-arrow-rotate {
	transform: rotate(180deg);
}

.filter-btn {
	width: 148rpx;
	height: 68rpx;
	line-height: 64rpx;
	background-color: #f8f8f8;
	border-radius: 8px;
	margin-right: 20rpx;
	margin-bottom: 20rpx;
	margin-left: 0;
	border: 2rpx solid transparent;
	overflow: hidden;
	padding: 0;
}

.filter-btn__text {
	display: inline-block;
	width: 148rpx;
	height: 68rpx;
	border-radius: 8px;
	line-height: 68rpx;
	color: #8e8e8e;
	text-align: center;
	font-size: 24rpx;
}

.filter-btn-active {
	background: #f61d30;
}

.filter-btn-active__text {
	color: #fff;
	background: #f61d30;
}

.filter-content {
	display: flex;
	flex-wrap: wrap;
}

uni-button:after {
	border: 0;
}

.empty {
}

.tab-box {
	flex: 1;
	background: $background-color-1;
	padding: 0 16rpx;
}

.uni-tab-item {
	/* #ifndef APP-PLUS */
	display: inline-block;
	/* #endif */
	flex-wrap: nowrap;
	padding-left: 6px;
	padding-right: 6px;
	flex: 1;
	justify-content: center;
	text-align: center;
}

.uni-tab-item-title {
	color: $text-base-color;
	font-size: 28rpx;
	height: 40px;
	line-height: 40px;
	font-weight: 400;
	flex-wrap: nowrap;
	/* #ifndef APP-PLUS */
	white-space: nowrap;
	/* #endif */
}

.uni-tab-item-title-active {
	color: $tabbar-color;
	font-weight: 500;
}

.swiper-item {
	flex: 1;
	flex-direction: column;
}

.page-item {
	flex: 1;
	flex-direction: row;
	position: absolute;
	left: 16rpx;
	top: 0;
	right: 16rpx;
	bottom: 0;
}
.middle {
	display: flex;
	flex-direction: column;
	background-color: #fff;
	border-radius: 16rpx;
	padding: 0rpx 64rpx 0rpx 48rpx;
}

.text-block {
	overflow: hidden;
	height: 66rpx;
	margin-bottom: 14rpx;
	border-bottom: 1px solid #f4f5f6;
}

.text-block-last {
	margin-bottom: 0;
	border-bottom: 0;
}

.middle-date {
	flex: 2;
	font-size: 28rpx;
	line-height: 66rpx;
	color: #333;
	margin-bottom: 8rpx;
}

.middle-date-des {
	flex: 5;
	font-size: 28rpx;
	line-height: 66rpx;
	height: 66rpx;
	overflow: hidden;
	text-overflow: ellipsis;
	color: #888;
}

.picker-year {
	position: relative;
	border-radius: 4px;
	align-items: center;
	line-height: normal;
}

.uni-list-cell {
	flex: 1;
	height: 66rpx;
	line-height: 66rpx;
}

.uni-list-cell-db {
	flex: 1;
}

.picker-block {
	flex: 1;
}

.uni-input-text {
	height: 66rpx;
	line-height: 66rpx;
	font-size: 14px;
	color: #888;
	text-overflow: ellipsis;
	white-space: nowrap;
	overflow: hidden;
}

.planout-block-lists {
	display: flex;
	flex-direction: column;
}
.main {
	position: relative;
	flex-direction: column;
}
.planout-block {
	display: flex;
	justify-content: space-between;
	margin-bottom: 10rpx;
	padding: 0 180rpx;
}

.btn {
	flex: 1;
	line-height: 70rpx;
	background: $wly-primary-color;
	border-radius: 46rpx;
	border: none;
}

.btn-text {
	color: #fff;
	font-size: 34rpx;
}
.icon-arrow {
	width: 50rpx;
	height: 20rpx;
	margin-top: 24rpx;
	transition-property: transform;
	transition-duration: 0.15s;
	transform: rotate(0deg);
	position: absolute;
	right: 0;
	z-index: 10;
}

.icon-arrow-rotate {
	transform: rotate(180deg);
}
.height25 {
	height: 50rpx;
}
</style>