<template>
  <view class="home-container">
    <!-- 顶部固定栏 (使用 padding-top 避开状态栏) -->
    <view class="header-section" :style="{ paddingTop: statusBarHeight + 'px' }">
      <view class="header-content">
        <image
          class="user-avatar"
          :src="userInfo.avatarUrl || '/static/images/default-avatar.png'"
          mode="aspectFill"
          @tap="handleLogin"
        />
        <view class="header-texts">
          <text class="title">全民评分</text>
          <text class="subtitle">看看全国网友怎么评分</text>
        </view>
      </view>

      <!-- 顶部切换 tab -->
      <scroll-view class="category-tabs" scroll-x :show-scrollbar="false">
        <view class="tabs-wrapper">
          <view 
            class="tab-item" 
            :class="{ active: currentCategoryId === category.id }"
            v-for="category in categories" 
            :key="category.id"
            @tap="switchCategory(category.id)"
          >
            <text class="tab-text">{{ category.title }}</text>
            <view class="tab-line" v-if="currentCategoryId === category.id"></view>
          </view>
        </view>
      </scroll-view>
    </view>

    <!-- 占位，防止固定头部遮挡内容 (增加 tab 的高度) -->
    <view :style="{ height: statusBarHeight + 104 + 'px' }"></view>

    <!-- 列表内容 -->
    <view class="topic-list">
      <view class="topic-card" v-for="topic in topicList" :key="topic.id">
        <!-- 卡片头部：标题与统计信息 -->
        <view class="topic-header">
          <text class="topic-title">{{ topic.title }}</text>
          <view class="topic-stats">
            <view class="stat-item">
              <text class="stat-icon icon-group"></text>
              <text>{{ topic.participants }}人参与</text>
            </view>
            <view class="stat-item heat">
              <text class="stat-icon icon-fire"></text>
              <text>热度 {{ topic.heat }}</text>
            </view>
          </view>
        </view>
        
        <!-- 排行榜列表 -->
        <view class="rank-list">
          <view 
            class="rank-item" 
            v-for="(item, index) in topic.items" 
            :key="item.id"
            @tap="goToRating(topic.id, item.id)"
          >
            <text class="rank-num" :class="'rank-' + (index + 1)">{{ index + 1 }}</text>
            <image class="item-avatar" :src="item.avatar" mode="aspectFill"></image>
            <text class="item-name">{{ item.name }}</text>
            <text class="item-score" :class="'score-' + (index + 1)">{{ item.score }}</text>
          </view>
        </view>
        
        <!-- AI 总结 -->
        <view class="ai-summary">
          <text class="ai-icon icon-robot"></text>
          <view class="summary-text">
            <text class="summary-label">AI总结：</text>
            <text class="summary-content">{{ topic.aiSummary }}</text>
          </view>
        </view>
        
        <!-- 标签列表 -->
        <view class="tag-list">
          <view class="tag" v-for="(tag, tIndex) in topic.tags" :key="tIndex">
            <text>#{{ tag }}</text>
          </view>
        </view>
      </view>
      
      <!-- 加载更多 -->
      <view class="load-more">
        <text>{{ loading ? '加载中...' : (hasMore ? '上拉加载更多' : '没有更多了') }}</text>
      </view>
    </view>

    <!-- 登录弹窗 -->
    <LoginPopup @logind="handleLoginSuccess" />
  </view>
</template>

<script setup>
import { ref, computed } from "vue";
import { getStatusBarHeight } from "@/utils/system";
import {
  onShareAppMessage,
  onShareTimeline,
  onShow,
  onPullDownRefresh,
  onReachBottom,
  onLoad,
} from "@dcloudio/uni-app";
import { useUserStore } from "@/stores/user";
import { getShareReward } from "@/api/system";
import { fetchTopicList, fetchTopicCategories } from "@/api/topic";
import { getShareToken, saveViewRequest } from "@/utils/common.js";
import LoginPopup from "@/components/LoginPopup/LoginPopup.vue";
import adManager from "@/utils/adManager.js";

const userStore = useUserStore();
const statusBarHeight = ref(getStatusBarHeight());
const userInfo = computed(() => userStore?.userInfo || {});

const loading = ref(false);
const hasMore = ref(true);
const currentCategoryId = ref('');
const categories = ref([]);
const currentPage = ref(1);

const loadCategories = async () => {
  try {
    const res = await fetchTopicCategories();
    // 提取真实数据数组
    const list = res?.data?.list || res?.list || res || [];
    
    // 增加一个“全部”的默认选项，id 置空
    categories.value = [{ id: '', title: '全部' }, ...list];
    
    // 初始化选中的ID为“全部”
    if (!currentCategoryId.value && categories.value.length > 0) {
      currentCategoryId.value = categories.value[0].id;
    }
    
    // 加载初始列表
    loadTopicList(currentCategoryId.value, currentPage.value);
  } catch (error) {
    console.error("获取分类失败:", error);
    // 兜底数据
    categories.value = [
      { id: '', title: '全部' },
      { id: 1, title: '历史' },
      { id: 2, title: '数码' },
    ];
    // 使用兜底也尝试加载一次
    loadTopicList(currentCategoryId.value, currentPage.value);
  }
};

const loadTopicList = async (categoryId, page = 1) => {
  if (page === 1) {
    topicList.value = [];
  }
  try {
    loading.value = true;
    const res = await fetchTopicList(categoryId, page);
    // 提取真实数据数组
    const list =  res?.list || [];
    
    // 合并数据
    topicList.value = [...topicList.value, ...list];
    hasMore.value = list.length >= 5;
  } catch (error) {
    console.error("获取主题列表失败:", error);
    hasMore.value = false;
  } finally {
    loading.value = false;
  }
};

const switchCategory = (categoryId) => {
  if (currentCategoryId.value === categoryId) return;
  currentCategoryId.value = categoryId;
  
  // 切换分类时重新加载数据
  currentPage.value = 1;
  hasMore.value = true;
  loadTopicList(categoryId, currentPage.value);
};

const mockData = [
  {
    id: 1,
    title: '你心中的千古一帝',
    participants: '23.5万',
    heat: '98k',
    items: [
      { id: 1, name: '李世民', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=1', score: '9.8' },
      { id: 2, name: '秦始皇', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=2', score: '9.5' },
      { id: 3, name: '康熙', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=3', score: '9.2' },
    ],
    aiSummary: '多数用户认为李世民综合能力最强，兼具文治武功。',
    tags: ['历史', '皇帝', '争议']
  },
  {
    id: 2,
    title: '国产手机系统谁最强',
    participants: '15万',
    heat: '76k',
    items: [
      { id: 1, name: 'iOS', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=4', score: '8.5' },
      { id: 2, name: 'HyperOS', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=5', score: '8.2' },
      { id: 3, name: 'OriginOS', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=6', score: '8.0' },
    ],
    aiSummary: '系统流畅度与动效是用户关注的核心，底层优化成为评分关键。',
    tags: ['数码', '手机', '测评']
  },
  {
    id: 3,
    title: '最值得定居的城市',
    participants: '12.8万',
    heat: '62k',
    items: [
      { id: 1, name: '成都', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=7', score: '9.2' },
      { id: 2, name: '杭州', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=8', score: '8.9' },
      { id: 3, name: '厦门', avatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=9', score: '8.7' },
    ],
    aiSummary: '宜居性与就业机会是主要博弈点，慢节奏生活深受青睐。',
    tags: ['城市', '生活', '推荐']
  }
];

const topicList = ref([...mockData]);

const goToRating = (topicId, itemId) => {
  uni.navigateTo({
    url: `/pages/rating/index?topicId=${topicId}&itemId=${itemId}`
  });
};

const handleLogin = () => {
  if (!userInfo.value.nickName) {
    uni.$emit("show-login-popup");
  }
};

let firstLoad = true;

const initData = () => {
  if (adManager.isAdShowing) return; // 防止广告页返回时立即重新渲染引发 insertTextView:fail
};

onLoad(async (options) => {
  uni.$trackRecord({
    eventName: "index_page_visit",
    eventType: `visit`,
  })
  if (options.shareToken) {
    saveViewRequest(options.shareToken, "index");
  }
  await loadCategories(); // 初始化时加载分类
  await loadTopicList(currentCategoryId.value); // 初始化时加载主题列表
  initData();
});

onShow(() => {
  if (firstLoad) {
    firstLoad = false;
    return;
  }
  initData();
});

const handleLoginSuccess = () => {
};

// 下拉刷新
onPullDownRefresh(async () => {
  currentPage.value = 1;
  hasMore.value = true;
  await loadTopicList(currentCategoryId.value, currentPage.value);
  uni.stopPullDownRefresh();
});

// 上拉加载更多
onReachBottom(() => {
  if (!hasMore.value || loading.value) return;
  currentPage.value += 1;
  loadTopicList(currentCategoryId.value, currentPage.value);
});

onShareAppMessage(async () => {
  const shareToken = await getShareToken("index");
  getShareReward();
  return {
    title: "全民评分",
    path: "/pages/index/index?shareToken=" + shareToken,
  };
});

onShareTimeline(async () => {
  const shareToken = await getShareToken("index");
  getShareReward();
  return {
    title: "全民评分",
    query: `shareToken=${shareToken}`,
  };
});

</script>

<style lang="scss" scoped>
.home-container {
  min-height: 100vh;
  background-color: #f5f6fa;
  box-sizing: border-box;
}

.header-section {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background-color: rgba(245, 246, 250, 0.95);
  backdrop-filter: blur(20rpx);
  padding-bottom: 20rpx;
}

.header-content {
  display: flex;
  align-items: center;
  padding: 0 32rpx;
  height: 120rpx;
}

.header-texts {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.title {
  font-size: 44rpx;
  font-weight: 800;
  color: #111;
  margin-bottom: 6rpx;
}

.subtitle {
  font-size: 24rpx;
  color: #666;
}

.user-avatar {
  width: 72rpx;
  height: 72rpx;
  border-radius: 50%;
  border: 2rpx solid #fff;
  box-shadow: 0 4rpx 12rpx rgba(0, 0, 0, 0.1);
  margin-right: 24rpx; /* 头像在左边时，增加右侧间距 */
}

/* Tab 样式 */
.category-tabs {
  width: 100%;
  white-space: nowrap;
  height: 88rpx;
}

.tabs-wrapper {
  display: inline-flex;
  padding: 0 16rpx;
  height: 100%;
  align-items: center;
}

.tab-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 24rpx;
  height: 100%;
  position: relative;
}

.tab-text {
  font-size: 30rpx;
  color: #666;
  transition: all 0.3s ease;
}

.tab-item.active .tab-text {
  font-size: 34rpx;
  font-weight: bold;
  color: #111;
}

.tab-line {
  position: absolute;
  bottom: 12rpx;
  width: 32rpx;
  height: 6rpx;
  background-color: #2953ff;
  border-radius: 4rpx;
  transition: all 0.3s ease;
}

.topic-list {
  padding: 24rpx 32rpx;
}

.topic-card {
  background-color: #ffffff;
  border-radius: 40rpx; /* 增加圆角，更圆润 */
  padding: 36rpx; /* 稍微增加内边距，让内容更呼吸 */
  margin-bottom: 36rpx;
  box-shadow: 0 8rpx 32rpx rgba(0, 0, 0, 0.04); /* 更柔和、扩散的阴影 */
  transition: transform 0.3s ease, box-shadow 0.3s ease; /* 增加过渡动画 */
}

.topic-card:active {
  transform: scale(0.98); /* 点击时微缩放效果 */
  box-shadow: 0 4rpx 16rpx rgba(0, 0, 0, 0.02);
}

.topic-header {
  margin-bottom: 32rpx;
}

.topic-title {
  font-size: 38rpx; /* 稍微调大标题 */
  font-weight: 800; /* 加粗标题 */
  color: #1a1a1a;
  margin-bottom: 16rpx;
  display: block;
  letter-spacing: 1rpx; /* 增加字间距 */
}

.topic-stats {
  display: flex;
  align-items: center;
}

.stat-item {
  display: flex;
  align-items: center;
  font-size: 24rpx;
  color: #888; /* 稍微调浅次要文本颜色 */
  margin-right: 32rpx;
  background-color: #f8f9fa; /* 增加极浅的背景色块 */
  padding: 6rpx 16rpx;
  border-radius: 100rpx; /* 完全圆角的统计标签 */
}

.stat-item.heat {
  color: #ff4d4f;
  background-color: #fff1f0; /* 热度专属浅红背景 */
}

.stat-icon {
  width: 24rpx;
  height: 24rpx;
  margin-right: 8rpx;
  display: inline-block;
  background-size: cover;
}

.icon-group {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23999999'%3E%3Cpath d='M16 11c1.66 0 2.99-1.34 2.99-3S17.66 5 16 5c-1.66 0-3 1.34-3 3s1.34 3 3 3zm-8 0c1.66 0 2.99-1.34 2.99-3S9.66 5 8 5C6.34 5 5 6.34 5 8s1.34 3 3 3zm0 2c-2.33 0-7 1.17-7 3.5V19h14v-2.5c0-2.33-4.67-3.5-7-3.5zm8 0c-.29 0-.62.02-.97.05 1.16.84 1.97 1.97 1.97 3.45V19h6v-2.5c0-2.33-4.67-3.5-7-3.5z'/%3E%3C/svg%3E");
}

.icon-fire {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ff4d4f'%3E%3Cpath d='M19.48 13.03c-.02-.19-.13-.36-.29-.46-.17-.11-.38-.13-.56-.05-.98.42-2.12.3-2.92-.31-1.07-.81-1.55-2.22-1.28-3.75.12-.66.1-1.32-.06-1.97-.24-.95-1.1-1.6-2.09-1.58-1 .02-1.83.74-2 1.72-.25 1.55-.95 2.94-2 4.02-1.38 1.41-2.05 3.39-1.85 5.4.2 2.05 1.42 3.86 3.25 4.82 1.37.72 2.94 1.01 4.5.83 2.74-.32 5.06-2.28 5.86-4.95.23-.75.29-1.52.19-2.28-.06-.5-.21-.99-.41-1.45l-.34-.99zm-4.98 6.47c-1.37 0-2.5-1.13-2.5-2.5s1.13-2.5 2.5-2.5 2.5 1.13 2.5 2.5-1.13 2.5-2.5 2.5z'/%3E%3C/svg%3E");
}

.rank-list {
  margin-bottom: 32rpx;
  background-color: #fafbfc; /* 增加极浅的灰底色作为容器 */
  border-radius: 32rpx;
  padding: 16rpx 24rpx;
}

.rank-item {
  display: flex;
  align-items: center;
  padding: 16rpx 0;
  border-bottom: 2rpx dashed rgba(0, 0, 0, 0.03); /* 柔和的虚线分割 */
}

.rank-item:last-child {
  border-bottom: none;
}

.rank-num {
  width: 44rpx;
  font-size: 32rpx;
  font-weight: 800;
  text-align: center;
  margin-right: 16rpx;
  font-style: italic; /* 数字增加倾斜感，更动感 */
}

.rank-1 {
  color: #2953ff;
  font-size: 36rpx; /* 第一名数字更大 */
}

.rank-2 {
  color: #ff8f00; /* 第二名橘色 */
}

.rank-3 {
  color: #ffc107; /* 第三名黄色 */
}

.item-avatar {
  width: 76rpx;
  height: 76rpx;
  border-radius: 50%;
  margin-right: 24rpx;
  background-color: #f0f0f0;
  box-shadow: 0 4rpx 12rpx rgba(0,0,0,0.06); /* 头像增加微阴影 */
  border: 4rpx solid #fff; /* 头像增加白边 */
}

.item-name {
  flex: 1;
  font-size: 32rpx;
  color: #2c2c2c;
  font-weight: 500;
}

.item-score {
  font-size: 36rpx;
  font-weight: 800;
  font-family: 'DIN Alternate', sans-serif; /* 推荐使用数字字体，如果没有则回退到 sans-serif */
}

.score-1 {
  color: #2953ff;
}

.score-2 {
  color: #ff8f00;
}

.score-3 {
  color: #ffc107;
}

.ai-summary {
  display: flex;
  align-items: flex-start;
  padding: 24rpx 32rpx;
  background: linear-gradient(135deg, #f8f6ff 0%, #ffffff 100%); /* 增加极浅的渐变背景 */
  border: 2rpx solid rgba(157, 91, 254, 0.15); /* 边框更加柔和透明 */
  border-radius: 24rpx;
  margin-bottom: 24rpx;
  box-shadow: 0 4rpx 16rpx rgba(157, 91, 254, 0.04); /* 增加紫色的微光阴影 */
}

.ai-icon {
  width: 36rpx;
  height: 36rpx;
  margin-right: 16rpx;
  margin-top: 2rpx;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%237B46F1'%3E%3Cpath d='M12 2a2 2 0 0 1 2 2c0 .74-.4 1.39-1 1.73V7h5a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V9a2 2 0 0 1 2-2h5V5.73A2 2 0 0 1 10 4a2 2 0 0 1 2-2zm-3 8a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3zm6 0a1.5 1.5 0 1 0 0 3 1.5 1.5 0 0 0 0-3z'/%3E%3C/svg%3E");
}

.summary-text {
  flex: 1;
  font-size: 28rpx;
  line-height: 1.6;
}

.summary-label {
  color: #7b46f1; /* 柔和一点的紫色 */
  font-weight: 800;
}

.summary-content {
  color: #4a4a4a;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16rpx;
}

.tag {
  background-color: #f4eaff;
  padding: 6rpx 20rpx;
  border-radius: 100rpx;
}

.tag text {
  color: #9d5bfe;
  font-size: 22rpx;
}

.load-more {
  text-align: center;
  padding: 30rpx 0;
  color: #999;
  font-size: 24rpx;
}
</style>
