<template>
	<view class="container">
		<view class="status_bar"></view>
		<!-- 顶部标题栏 固定 -->
		<view class="top-bar">
			<uni-nav-bar left-icon="left" title="活动列表" backgroundColor="none" :border="false"
				@clickLeft="narBack" />
		</view>

		<!-- 滚动区域：从banner开始滚动 -->
		<scroll-view class="scroll-container" scroll-y="true" @scrolltolower="loadMoreData"
			:lower-threshold="100">
			<!-- 顶部图片 -->
			<view class="topImg">
				<image src="http://47.104.199.163:9090/images/home/banner.png"
					style="width: 100%;height:100%;"></image>
			</view>

			<!-- 选项卡 -->
			<view class="tabs-container">
				<view class="tab-item" :class="{ 'active': activeTab === 'list' }" @tap="switchTab('list')">
					活动列表
					<view v-if="activeTab === 'list'" class="tab-indicator"></view>
				</view>
				<view class="tab-item" :class="{ 'active': activeTab === 'my' }" @tap="switchTab('my')">
					我的活动
					<view v-if="activeTab === 'my'" class="tab-indicator"></view>
				</view>
			</view>

			<!-- 我的活动状态筛选 -->
			<view v-if="activeTab === 'my'" class="filter-container">
				<scroll-view class="filter-scroll" scroll-x>
					<view class="filter-buttons">
						<view v-for="filter in filters" :key="filter.value" class="filter-btn"
							:class="{ 'active': myFilter === filter.value }" @tap="switchFilter(filter.value)">
							{{ filter.label }}
						</view>
					</view>
				</scroll-view>
			</view>

			<!-- 活动列表 -->
			<view class="activity-list">
				<!-- 空状态 -->
				<view v-if="displayedActivities.length === 0" class="empty-state">
					<uni-icons type="info" size="30" color="#ccc"></uni-icons>
					<text class="empty-text">
						{{ activeTab === 'list' ? '暂无活动' : '暂无参与的活动' }}
					</text>
				</view>

				<!-- 活动卡片 -->
				<view v-for="activity in displayedActivities" :key="activity.id" class="activity-card"
					@tap="viewActivityDetail(activity)">
					<view class="status-badge">
						{{activity.statusText}}
					</view>

					<view v-if="activity.applied && activeTab === 'list'" class="signed-badge">
						<text>已报名</text>
					</view>

					<view class="activity-info">
						<view class="u-demo-block__content ">
							<up-row justify="space-between" customStyle="margin-bottom: 10px">
								<up-col span="4">
									<view class="info-image-left">
										<image :src="activity.coverImage"
											style="width: 100%;height: 100%;"></image>
									</view>
								</up-col>
								<up-col span="8">
									<view class="demo-layout bg-purple">
										<view class="activity-title">
											{{ activity.title }}
										</view>
										<view class="activity-detail">
											<text class="detail-text">时间：{{ formatDate(activity.startTime) }} 至
												{{ formatDate(activity.endTime) }}</text>
										</view>

										<view class="activity-detail">
											<text class="detail-text-address">地点：{{ activity.address }}</text>
										</view>

										<view class="activity-detail">
											<text class="detail-text-num">活动名额{{ activity.quota }}人，已报名{{ activity.appliedCount }}人</text>
										</view>
									</view>
								</up-col>
							</up-row>
						</view>

						<view class="action-buttons">
							<button v-if="activeTab === 'list' && activity.applied === false" class="action-btn signup-btn"
								@tap.stop="signupActivity(activity)">
								立即报名
							</button>
							<button v-if="activeTab === 'list' && activity.applied === true" class="action-btn signup-btn"
								@tap.stop="cancelActivity(activity)">
								取消报名
							</button>
						</view>
					</view>
				</view>

				<!-- 加载更多 -->
				<view v-if="hasMoreData && displayedActivities.length > 0" class="load-more-container">
					<view v-if="!isLoading" class="load-more-btn" @tap="loadMoreData">
						<text>加载更多</text>
						<uni-icons type="arrow-down" size="16" color="#007AFF"></uni-icons>
					</view>
					<view v-else class="loading-container">
						<uni-icons type="spinner-cycle" size="20" color="#007AFF" class="loading-icon"></uni-icons>
						<text>正在加载...</text>
					</view>
				</view>
			</view>
		</scroll-view>
	</view>
</template>

<script setup>
import { ref, watch } from 'vue'
import { onLoad, onUnload, onShow } from '@dcloudio/uni-app'
import moment from 'moment';
import { getActivityList } from '../api/api.js'

// ===================== 响应式数据 =====================
const activeTab = ref('list') // 'list' 或 'my'
const myFilter = ref('reviewing') // 我的活动筛选条件
const isLoading = ref(false)
const hasMoreData = ref(true)
const currentPage = ref(1)
const pageSize = ref(5)
const total = ref(0)
const displayedActivities = ref([]) // 当前显示的活动列表

// 筛选条件
const filters = ref([
	{ label: '审核中', value: 'reviewing' },
	{ label: '已通过', value: 'passed' },
	{ label: '未通过', value: 'rejected' },
	{ label: '已结束', value: 'ended' }
])

// ===================== 核心方法 =====================
/**
 * 重置并刷新第一页数据
 */
const resetAndLoad = () => {
	currentPage.value = 1
	displayedActivities.value = []
	hasMoreData.value = true
	getActivityListData(1)
}

/**
 * 返回上一级页面
 */
const narBack = () => {
	const sourcePage = uni.getStorageSync('sourcePage')
	if (sourcePage === "index") {
		uni.switchTab({ url: "/pages/index/index" })
	} else if (sourcePage === "serviceIndex") {
		uni.switchTab({ url: "/pages/serviceIndex/serviceIndex" })
	} else {
		uni.navigateBack()
	}
}

/**
 * 切换选项卡（活动列表/我的活动）
 * @param {string} tab - 选项卡类型
 */
const switchTab = (tab) => {
	activeTab.value = tab
	if (tab === 'list') {
		resetAndLoad()
	} else {
		// 暂无审核功能，"我的活动"默认显示暂无数据
		displayedActivities.value = []
		hasMoreData.value = false
		currentPage.value = 1
	}
}

/**
 * 切换我的活动筛选条件
 * @param {string} filter - 筛选值
 */
const switchFilter = (filter) => {
	myFilter.value = filter
	// resetAndLoad()
}

/**
 * 获取活动列表数据
 * @param {number} pageNum - 页码
 */
const getActivityListData = async (pageNum = 1) => {
	// 防止重复加载
	if (isLoading.value) return
	isLoading.value = true

	try {
		// 构造请求参数（区分活动列表/我的活动 + 筛选条件）
		const params = {
			pageNum: pageNum,
			pageSize: pageSize.value,
			//tabType: activeTab.value, // 传给后端：list/my
			//filterType: activeTab.value === 'my' ? myFilter.value : '' // 我的活动筛选条件
		}

		const res = await getActivityList(params)

		if (res.code === 200) {
			const list = res.rows || []
			total.value = res.total || 0
			
			// 第一页覆盖数据，下一页追加数据
			if (pageNum === 1) {
				displayedActivities.value = list
			} else {
				displayedActivities.value = [...displayedActivities.value, ...list]
			}

			// 判断是否还有更多数据
			hasMoreData.value = displayedActivities.value.length < total.value
			currentPage.value = pageNum
		} else {
			uni.showToast({ title: res.msg || "加载失败", icon: 'error' })
			if (pageNum === 1) displayedActivities.value = []
		}
	} catch (err) {
		uni.showToast({ title: "网络异常", icon: 'none' })
		if (pageNum === 1) displayedActivities.value = []
	} finally {
		isLoading.value = false
	}
}

/**
 * 加载更多数据
 */
const loadMoreData = () => {
	if (isLoading.value || !hasMoreData.value) return
	getActivityListData(currentPage.value + 1)
}

/**
 * 格式化日期
 * @param {string} date - 原始日期字符串
 * @returns {string} 格式化后的日期
 */
const formatDate = (date) => {
	if (!date) return ''
	return moment(date).format('YYYY-MM-DD HH:mm')
}

/**
 * 报名活动（跳转详情页）
 * @param {object} activity - 活动对象
 */
const signupActivity = (activity) => {
	uni.navigateTo({
		url: `/pageSubPack/activity-list/activityListDetails?id=${activity.id}&title=${activity.title}&applied=${activity.applied}`
	})
}

/**
 * 取消报名（跳转详情页）
 * @param {object} activity - 活动对象
 */
const cancelActivity = (activity) => {
	uni.navigateTo({
		url: `/pageSubPack/activity-list/activityListDetails?id=${activity.id}&title=${activity.title}&applied=${activity.applied}`
	})
}

/**
 * 查看活动详情（跳转详情页）
 * @param {object} activity - 活动对象
 */
const viewActivityDetail = (activity) => {
	uni.navigateTo({
		url: `/pageSubPack/activity-list/activityListDetails?id=${activity.id}&title=${activity.title}&applied=${activity.applied}`
	})
}

// ===================== 生命周期 & 监听 =====================
/**
 * 页面显示时刷新数据
 */
onShow(() => {
	if (activeTab.value === 'list') {
		getActivityListData(1) // 强制刷新第一页
	}
})

/**
 * 页面加载时监听刷新事件（来自详情页）
 */
onLoad(() => {
	// 监听详情页报名/取消报名后的刷新通知
	uni.$on('refreshActivityList', (data) => {
		// console.log('收到活动列表刷新通知：', data)
		getActivityListData(1)
	})
})

/**
 * 页面卸载时移除事件监听（避免内存泄漏）
 */
onUnload(() => {
	uni.$off('refreshActivityList')
})

/**
 * 监听我的活动筛选条件变化
 */
watch(() => myFilter.value, () => {
	// 暂无审核功能，筛选条件暂不触发加载
})
</script>

<style scoped>
/* 页面容器 */
.container {
	width: 100%;
	height: 100vh;
	background-color: #fff;
	display: flex;
	flex-direction: column;
	padding: 0;
}

.status_bar {
	height: 46px;
	width: 100%;
}

/* 顶部标题 固定 */
.top-bar {
	width: 100%;
	flex-shrink: 0;
	background: #fff;
}

/* 滚动区域 */
.scroll-container {
	flex: 1;
	width: 100%;
	overflow-y: auto;
	padding: 0 40rpx;
	box-sizing: border-box;
}

.topImg {
	width: 100%;
	height: 280rpx;
	margin: 20rpx 0;
}

/* 顶部选项卡 */
.tabs-container {
	display: flex;
	top: 0;
	z-index: 10;
	margin-bottom: 20rpx
}

.tab-item {
	flex: 1;
	text-align: center;
	padding: 20rpx 0;
	font-size: 32rpx;
	color: #666;
	position: relative;
}

.tab-item.active {
	color: #007AFF;
	font-weight: 500;
}

.tab-indicator {
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 120rpx;
	height: 6rpx;
	background-color: #007AFF;
	border-radius: 4rpx;
}

/* 筛选容器 */
.filter-container {
	background-color: #fff;
	padding: 20rpx 0;
	border-bottom: 1px solid #eee;
}

.filter-scroll {
	width: 100%;
	white-space: nowrap;
}

.filter-buttons {
	display: inline-flex;
	padding: 0 30rpx;
}

.filter-btn {
	display: inline-block;
	padding: 12rpx 30rpx;
	margin-right: 20rpx;
	font-size: 28rpx;
	color: #666;
	background-color: #f8f8f8;
	border-radius: 25rpx;
	border: 1px solid #eee;
}

.filter-btn.active {
	color: #fff;
	background-color: #2F77FD;
}

/* 活动列表 */
.activity-list {
	width: 100%;
	padding-bottom: 40rpx;
}

/* 活动卡片 */
.activity-card {
	background-color: #fff;
	border-radius: 16rpx;
	padding: 30rpx;
	margin-bottom: 30rpx;
	box-shadow: 0 4rpx 20rpx rgba(0, 0, 0, 0.05);
	position: relative;
	border: 1px solid #e1e1e1;
}

/* 活动状态标签 */
.status-badge {
	position: absolute;
	top: 10rpx;
	left: 20rpx;
	padding: 6rpx 20rpx;
	font-size: 22rpx;
	border-radius: 15rpx 0rpx 15rpx 0rpx;
	color: #fff;
	z-index: 1;
	background: repeating-linear-gradient(to right, #FD7373, #FB3F3F);
}

/* 已报名标识 */
.signed-badge {
	position: absolute;
	top: 20rpx;
	right: 8rpx;
	display: flex;
	align-items: center;
	padding: 6rpx 14rpx;
	color: #007AFF;
	font-size: 22rpx;
	border-radius: 20rpx;
	z-index: 1;
}

.signed-badge text {
	margin-left: 8rpx;
}

/* 活动信息 */
.activity-info {
	margin-top: 10rpx;
}

.info-image-left {
	width: 170rpx;
	height: 220rpx;
}

.activity-title {
	font-size: 30rpx;
	font-weight: 500;
	color: #222;
	margin-bottom: 30rpx;
	line-height: 1.4;
	padding-right: 100rpx;
}

.activity-detail {
	display: flex;
	align-items: flex-start;
	margin-bottom: 20rpx;
	color: #999;
	font-size: 24rpx;
	line-height: 1.4;
}

.activity-detail .uni-icons {
	margin-right: 15rpx;
	margin-top: 4rpx;
	flex-shrink: 0;
}

.detail-text-num {
	font-size: 28rpx;
	color: #666666;
}

.detail-text {
	flex: 1;
	font-size: 20rpx;
}
.detail-text-address{
	flex: 1;
	font-size: 22rpx;
}

/* 操作按钮 */
.action-buttons {
	margin-top: 30rpx;
	display: flex;
	justify-content: flex-end;
}

.action-btn {
	padding: 0px 26rpx;
	height: 50rpx;
	line-height: 50rpx;
	font-size: 22rpx;
	border-radius: 10rpx;
	margin: 0;
}

.signup-btn {
	background-color: #007AFF;
	color: #fff;
}

.signup-btn:active {
	background-color: #0056cc;
}

/* 加载更多 */
.load-more-container {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: 40rpx 0;
	color: #999;
}

.load-more-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 20rpx 40rpx;
	background-color: #f8f8f8;
	border-radius: 50rpx;
	color: #007AFF;
	font-size: 28rpx;
	margin-bottom: 20rpx;
}

.load-more-btn text {
	margin-right: 10rpx;
}

.loading-container {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 20rpx 40rpx;
	background-color: #f8f8f8;
	border-radius: 50rpx;
	color: #007AFF;
	font-size: 28rpx;
	margin-bottom: 20rpx;
}

.loading-icon {
	margin-right: 10rpx;
	animation: rotate 1s linear infinite;
}

@keyframes rotate {
	from {
		transform: rotate(0deg);
	}

	to {
		transform: rotate(360deg);
	}
}

/* 空状态 */
.empty-state {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	padding: 100rpx 0;
	color: #ccc;
}

.empty-text {
	font-size: 32rpx;
	color: #999;
	margin-top: 20rpx;
	margin-bottom: 10rpx;
}
</style>