<template>
	<view data-component-name="diy-many-goods-list" class="many-goods-list">
		<scroll-view scroll-x="true" class="many-goods-list-head" :scroll-into-view="'a' + cateIndex"
			:style="manyWrapCss">
			<view v-for="(item, index) in value.list" class="scroll-item" :class="{ active: index == cateIndex }"
				:id="'a' + index" :key="index" @click="handlerClick({ item, index })" @tap="handlerClick({ item, index })">
				<view class="split-line" v-if="index > 0"></view>
				<view class="cate">
					<view class="name" :style="{ color: value.headStyle.titleColor }">{{ item.title }}</view>
					<view class="desc" :class="{ 'color-base-bg': index == cateIndex && item.desc }">{{ item.desc }}
					</view>
				</view>
			</view>
		</scroll-view>
		<view class="many-goods-list-fill" :style="{ 'height': manyInfo.height }" v-if="fixedTop"></view>
		<diy-goods-list class="many-goods-list-body" v-if="goodsValue" :value="goodsValue"
			ref="diyGoodsList"></diy-goods-list>
	</view>
</template>

<script>
import DiyMinx from './minx.js'
export default {
	name: 'diy-many-goods-list',
	props: {
		value: {
			type: Object,
			default: () => {
				return {};
			}
		},
		scrollTop: {
			type: [Number, String]
		},
		global: {
			type: Object,
			default: () => {
				return {};
			}
		}
	},
	data() {
		return {
			cateIndex: 0, // 当前选中的分类id
			goodsValue: null, // 商品列表数据
			manyInfo: {
				bodyHeight: 0,
				bodyTop: 0,
				height: 0,
				top: 0
			}
		};
	},
	created() {
		this.changeCateIndex(this.value.list[0], 0, true);
	},
	mixins: [DiyMinx],
	watch: {
		// 组件刷新监听
		componentRefresh: function (nval) {
			this.changeCateIndex(this.value.list[0], 0, true);
		},
		scrollTop: function (nval) {
			const query = uni.createSelectorQuery().in(this);
			query
				.select('.many-goods-list')
				.boundingClientRect(data => {
					if (data) {
						this.manyInfo.top = data.top;
					}
				})
				.exec();

			query
				.select('.many-goods-list .many-goods-list-body')
				.boundingClientRect(data => {
					if (data) {
						this.manyInfo.bodyHeight = (data.height || 0);
						this.manyInfo.bodyTop = (data.top || 0);
					}
				})
				.exec();
		}
	},
	computed: {
		fixedTop() {
			let diyPositionObj = JSON.parse(JSON.stringify(this.$store.state.diyGroupPositionObj));
			let positionHeight = 0;
			let height = 0;

			delete diyPositionObj.diyManyGoodsList;

			if (diyPositionObj) {
				let arr = Object.values(diyPositionObj);
				arr.forEach((item, index) => {
					positionHeight += item.originalVal; //定位的高度【搜索框+导航分类+自定义头部】
				});
			}

			if (this.manyInfo.top < positionHeight && (this.manyInfo.bodyTop + this.manyInfo.bodyHeight >
				positionHeight + Number.parseFloat(this.manyInfo.height))) {
				height = positionHeight;
			}
			return height;
		},
		manyWrapCss() {
			let html = '';
			html += `position: ${this.fixedTop ? 'fixed' : 'initial'};`
			html += `top: ${this.fixedTop}px;`
			if (!this.global.topNavBg)
				html += `background-color: #fff;`
			else
				html += `background-color: ${this.fixedTop ? this.global.topNavColor : 'transparent'};`
			return html;
		}
	},
	mounted() {
		const query = uni.createSelectorQuery().in(this);
		query
			.select('.many-goods-list .many-goods-list-head')
			.boundingClientRect(data => {
				if (data) {
					this.manyInfo.height = (data.height || 0) + 'px';
					// 向vuex中的diyIndexPositionObj增加多商品组件定位位置
					let diyManyGoodsList = {
						originalVal: data.height || 0 //自身高度 px
					}
					this.$store.commit('setDiyGroupPositionObj', {
						diyManyGoodsList: diyManyGoodsList
					});
				}
			})
			.exec();
	},
	methods: {
		changeCateIndex(item, index, isFirst) {
			this.cateIndex = index;
			this.goodsValue = {
				sources: item.sources,
				categoryId: item.categoryId,
				categoryName: item.categoryName,
				goodsId: item.goodsId,
				componentBgColor: this.value.componentBgColor,
				componentAngle: this.value.componentAngle,
				topAroundRadius: this.value.topAroundRadius,
				bottomAroundRadius: this.value.bottomAroundRadius,
				elementBgColor: this.value.elementBgColor,
				elementAngle: this.value.elementAngle,
				topElementAroundRadius: this.value.topElementAroundRadius,
				bottomElementAroundRadius: this.value.bottomElementAroundRadius,
				count: this.value.count,
				nameLineMode: this.value.nameLineMode,
				template: this.value.template,
				style: this.value.style,
				ornament: this.value.ornament,
				sortWay: this.value.sortWay,
				saleStyle: this.value.saleStyle,
				tag: this.value.tag,
				btnStyle: this.value.btnStyle,
				goodsNameStyle: this.value.goodsNameStyle,
				theme: this.value.theme,
				priceStyle: this.value.priceStyle,
				slideMode: this.value.slideMode,
				imgAroundRadius: this.value.imgAroundRadius,
				margin: this.value.margin,
				goodsMarginType: this.value.goodsMarginType,
				goodsMarginNum: this.value.goodsMarginNum
			};

			// 如果是第一次加载，不需要执行下面代码
			if (isFirst) return;
			this.$refs.diyGoodsList.goodsValue = this.goodsValue;
			this.$refs.diyGoodsList.getGoodsList();
		},
		async handlerClick({ item, index }) {
			await this.__$emitEvent({
				eventName: 'many-goods-list-tap', data: { item, index }, promiseCallback: (event, handler, awaitedResult) => {
					if (!awaitedResult) return;
					this.changeCateIndex(item, index, false);
				}
			})
		},
	}
};
</script>

<style lang="scss" scoped>
.many-goods-list-head {
	left: 0;
	right: 0;
	z-index: 5;
	background-color: #fff;
}

scroll-view {
	width: 100%;
	white-space: nowrap;
	box-sizing: border-box;
	padding: 20rpx 0;

	.scroll-item {
		display: inline-block;
		text-align: center;
		vertical-align: top;
		width: calc(25% - 40rpx);
		position: relative;
		padding: 0 20rpx;

		&:first-child {
			width: calc(25% - 20rpx);
			padding-left: 0;
		}

		.split-line {
			display: inline-block;
			width: 1rpx;
			height: 30rpx;
			background-color: #e5e5e5;
			position: absolute;
			left: 0;
			top: 50%;
			transform: translateY(-50%);
		}

		&.active {
			.name {
				font-weight: bold;
			}

			.desc {
				color: #ffffff;
				border-radius: 20rpx;
			}
		}

		.name {
			font-size: 32rpx;
			color: $color-title;
			line-height: 1;
		}

		.cate {
			display: inline-block;
		}

		.desc {
			font-size: $font-size-tag;
			color: $color-tip;
			height: 36rpx;
			line-height: 36rpx;
			margin-top: 10rpx;
			min-width: 120rpx;
			max-width: 220rpx;
			overflow: hidden;
			text-overflow: ellipsis;
			padding: 0 10rpx;
		}
	}
}
</style>