<template>
  <view class="activity-page">
    <!-- 搜索栏和一级Tab合并容器 -->
    <view class="search-section">
      <view class="search-bar">
        <uv-icon name="search" size="18" color="#999"></uv-icon>
        <input type="text" placeholder="搜索活动名称" class="search-input" v-model="searchKeyword" />
      </view>
      
      <!-- 一级Tab：当前活动/往期活动 移到搜索容器内 -->
      <view class="primary-tabs">
        <view 
          class="primary-tab-item" 
          :class="{ active: primaryActiveTab === 'current' }"
          @click="switchPrimaryTab('current')"
        >
          当前活动
        </view>
        <view 
          class="primary-tab-item" 
          :class="{ active: primaryActiveTab === 'past' }"
          @click="switchPrimaryTab('past')"
        >
          往期活动
        </view>
      </view>
    </view>

    <!-- 二级Tab：使用uv-tabs组件 -->
    <view class="secondary-tabs">
      <uv-tabs 
        :list="secondaryTabs" 
        :current="secondaryActiveIndex"
        @change="switchSecondaryTab"
        lineColor="#007AFF"
        activeColor="#007AFF"
        inactiveColor="#666"
        :lineWidth="30"
        :lineHeight="3"
        itemStyle="padding: 10px 20px;"
      ></uv-tabs>
    </view>

    <!-- 活动列表 -->
    <view class="activity-list">
      <view 
        class="activity-item" 
        v-for="(item, index) in filteredActivities" 
        :key="index"
        @click="goToActivityDetail(item)"
      >
        <!-- 活动图片 -->
        <view class="activity-image">
          <image :src="item.image" mode="aspectFill" class="image"></image>
        </view>
        
        <!-- 活动信息 -->
        <view class="activity-info">
          <view class="title-row">
            <!-- 活动标签 -->
            <view class="activity-tag" :style="{ backgroundColor: item.tagColor }">
              {{ item.tag }}
            </view>
            <view class="activity-title">{{ item.title }}</view>
          </view>
          <view class="activity-location">
            <uv-icon name="map-fill" size="14" color="#999"></uv-icon>
            <text class="location-text">{{ item.location }}</text>
          </view>
          <view class="activity-time">
            <uv-icon name="calendar" size="14" color="#999"></uv-icon>
            <text class="time-text">{{ item.time }}</text>
          </view>
          <view class="activity-participants">
            <uv-icon name="account-fill" size="14" color="#999"></uv-icon>
            <text class="participants-text">报名人数：{{ item.participants }}/{{ item.maxParticipants }}</text>
          </view>
        </view>
        
        <!-- 报名按钮 -->
        <view class="activity-action">
          <uv-button type="primary" size="mini" shape="circle" :text="item.isFullOrExpired ? '已结束' : '报名中'" :disabled="item.isFullOrExpired" @click.stop="signUpActivity(item)"></uv-button>
        </view>
      </view>
    </view>

    <!-- 空状态 -->
    <view class="empty-state" v-if="filteredActivities.length === 0">
      <uv-empty mode="data" text="暂无活动数据"></uv-empty>
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      searchKeyword: '',
      primaryActiveTab: 'current', // current: 当前活动, past: 往期活动
      secondaryActiveIndex: 0,
      secondaryTabs: [
        { name: '全部' },
        { name: '品牌项目' },
        { name: '公益活动' },
        { name: '培训活动' }
      ],
      // 模拟活动数据
      activities: [
        {
          id: 1,
          title: '关爱自闭症儿童活动',
          location: '长沙市雨花区时代阳光大道国际人才2145',
          time: '2025/08/1-2025/09/01',
          participants: 12,
          maxParticipants: 30,
          image: '/static/bannerImage.png',
          tag: '30分',
          tagColor: '#007AFF',
          category: 'charity', // all, brand, charity, training
          status: 'current', // current, past
          isFullOrExpired: false
        },
        {
          id: 2,
          title: '社区环保志愿服务',
          location: '长沙市岳麓区梅溪湖国际新城',
          time: '2025/07/15-2025/07/20',
          participants: 25,
          maxParticipants: 40,
          image: '/static/bannerImage.png',
          tag: '20分',
          tagColor: '#52C41A',
          category: 'charity',
          status: 'current',
          isFullOrExpired: false
        },
        {
          id: 3,
          title: '青少年编程培训',
          location: '长沙市开福区万达广场',
          time: '2025/06/01-2025/06/30',
          participants: 30,
          maxParticipants: 30,
          image: '/static/bannerImage.png',
          tag: '50分',
          tagColor: '#FF6B35',
          category: 'training',
          status: 'past',
          isFullOrExpired: true
        },
        {
          id: 4,
          title: '品牌推广活动',
          location: '长沙市天心区IFS国金中心',
          time: '2025/05/10-2025/05/15',
          participants: 18,
          maxParticipants: 25,
          image: '/static/bannerImage.png',
          tag: '40分',
          tagColor: '#722ED1',
          category: 'brand',
          status: 'past',
          isFullOrExpired: true
        }
      ]
    }
  },
  computed: {
    filteredActivities() {
      let filtered = this.activities;
      
      // 根据一级tab筛选
      filtered = filtered.filter(item => item.status === this.primaryActiveTab);
      
      // 根据二级tab筛选
      const categoryMap = {
        0: 'all',
        1: 'brand',
        2: 'charity',
        3: 'training'
      };
      
      const selectedCategory = categoryMap[this.secondaryActiveIndex];
      if (selectedCategory !== 'all') {
        filtered = filtered.filter(item => item.category === selectedCategory);
      }
      
      // 根据搜索关键词筛选
      if (this.searchKeyword.trim()) {
        filtered = filtered.filter(item => 
          item.title.toLowerCase().includes(this.searchKeyword.toLowerCase())
        );
      }
      
      return filtered;
    }
  },
  methods: {
    // 切换一级tab
    switchPrimaryTab(tab) {
      this.primaryActiveTab = tab;
    },
    
    // 切换二级tab
    switchSecondaryTab(index) {
      this.secondaryActiveIndex = index;
    },
    
    // 跳转到活动详情
    goToActivityDetail(activity) {
      uni.navigateTo({
        url: `/subPages/index/activityDetail?id=${activity.id}`
      });
    },
    
    // 报名活动
    signUpActivity(item) {
      if (item.isFullOrExpired) {
        uni.showToast({
          title: '活动已结束',
          icon: 'none'
        });
        return;
      }
      uni.navigateTo({
        url: `/subPages/index/activityDetail?id=${item.id}`
      });
    }
  },
  
  onLoad() {
    // 页面加载时的初始化逻辑
    console.log('活动页面加载完成');
  }
}
</script>

<style lang="scss" scoped>
.activity-page {
  background-color: #f5f5f5;
  min-height: 100vh;
}

// 搜索栏样式 - 修改为包含一级Tab
.search-section {
  height: 350rpx;
  background: linear-gradient(180deg,#1488db, #98b5f1);
  padding-top: 180rpx; /* 使用padding-top避免margin塌陷 */
  box-sizing: border-box; /* 确保padding包含在高度内 */
}

.search-bar {
  background-color: white;
  border-radius: 50rpx;
  padding: 20rpx 30rpx;
  display: flex;
  align-items: center;
  gap: 20rpx;
  width: 85%;
  margin: 0 auto ; /* 移除margin-top，只保留左右居中和下边距 */
}

.search-input {
  flex: 1;
  font-size: 28rpx;
  color: #333;
  
  &::placeholder {
    color: #999;
  }
}

// 一级Tab样式 - 调整为在蓝色背景内
.primary-tabs {
  display: flex;
  padding: 0 20rpx;
  margin-bottom: 20rpx;
}

.primary-tab-item {
  flex: 1;
  text-align: center;
  padding: 20rpx 0;
  font-size: 32rpx;
  color: #000000; /* 白色半透明 */
  position: relative;
  
  &.active {
    color: white; /* 激活状态为纯白色 */
    font-weight: 600;
    
    &::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 100rpx;
      height: 6rpx;
      background-color: white; /* 下划线改为白色 */
      border-radius: 3rpx;
    }
  }
}

// 二级Tab样式 - 保持不变
.secondary-tabs {
  background-color: white;
  border-bottom: 1px solid #f0f0f0;
}

// 活动列表样式
.activity-list {
  padding: 20rpx;
}

.activity-item {
  background-color: white;
  border-radius: 12rpx;
  margin-bottom: 30rpx;
  padding: 20rpx;
  display: flex;
  box-shadow: 0 4rpx 20rpx rgba(0, 0, 0, 0.05);
}

.activity-image {
  width: 180rpx;
  height: 180rpx;
  border-radius: 8rpx;
  overflow: hidden;
  flex-shrink: 0;
  margin-right: 20rpx;
}

.image {
  width: 100%;
  height: 100%;
}

.activity-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.title-row {
  display: flex;
  align-items: center;
  margin-bottom: 10rpx;
}

.activity-tag {
  width: 31px;
  height: 20px;
  background: #218cdd;
  border-radius: 3.5px;
  margin-right: 7rpx;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18rpx;
  color: white;
  font-weight: 600;
}

.activity-title {
  font-size: 28rpx;
  font-weight: bold;
  color: #333;
  line-height: 1.4;
}

.activity-location,
.activity-time,
.activity-participants {
  display: flex;
  align-items: center;
  margin-bottom: 6rpx;
  
  .location-text,
  .time-text,
  .participants-text {
    font-size: 24rpx;
    color: #666;
    margin-left: 6rpx;
  }
}

.activity-action {
  display: flex;
  align-items: flex-end;
  padding-bottom: 10rpx;
}

// 空状态样式
.empty-state {
  padding: 100rpx 40rpx;
}
</style>