<template>
  <view class="topic-card">
    <!-- 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="handleItemTap(item.id)"
      >
        <text class="rank-num" :class="'rank-' + (index + 1)">{{ index + 1 }}</text>
        <image class="item-avatar" :src="FILE_BASE_URL + item.avatarUrl" mode="aspectFill"></image>
        <text class="item-name">{{ item.name }}</text>
        <text class="item-score" :class="'score-' + (index + 1)">{{ item.scoreAvg }}</text>
      </view>
    </view>
    
    <!-- AI 总结 -->
    <view class="ai-summary" v-if="topic.aiSummary">
      <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>
</template>

<script setup>
import { FILE_BASE_URL } from "@/utils/constants";

const props = defineProps({
  topic: {
    type: Object,
    required: true,
    default: () => ({})
  }
});

const emit = defineEmits(['item-click']);

const handleItemTap = (itemId) => {
  emit('item-click', props.topic.id, itemId);
};
</script>

<style lang="scss" scoped>
.topic-card {
  background-color: #ffffff;
  border-radius: 40rpx;
  padding: 36rpx;
  margin-bottom: 32rpx;
  box-shadow: 0 8rpx 32rpx rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease;
}

.topic-card:active {
  transform: scale(0.98);
}

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

.topic-title {
  font-size: 38rpx;
  font-weight: 800;
  color: #222;
  margin-bottom: 20rpx;
  display: block;
  letter-spacing: 1rpx;
}

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

.stat-item {
  display: flex;
  align-items: center;
  font-size: 24rpx;
  color: #666;
  margin-right: 20rpx;
  background-color: #f7f7f9;
  padding: 6rpx 16rpx;
  border-radius: 100rpx;
}

.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: 24rpx;
  background-color: #fcfcfd;
  border-radius: 24rpx;
  padding: 16rpx 24rpx;
}

.rank-item {
  display: flex;
  align-items: center;
  padding: 16rpx 0;
  border-bottom: 2rpx dashed #eee;
}

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

.rank-num {
  width: 44rpx;
  font-size: 34rpx;
  font-weight: 900;
  text-align: center;
  margin-right: 16rpx;
  font-style: italic;
}

.rank-1 {
  color: #2953ff;
  font-size: 40rpx;
}

.rank-2, .rank-3 {
  color: #333;
}

.item-avatar {
  width: 72rpx;
  height: 72rpx;
  border-radius: 50%;
  margin-right: 24rpx;
  background-color: #f0f0f0;
  border: 4rpx solid #fff;
  box-shadow: 0 4rpx 12rpx rgba(0, 0, 0, 0.05);
}

.item-name {
  flex: 1;
  font-size: 30rpx;
  color: #333;
  font-weight: 500;
}

.item-score {
  font-size: 36rpx;
  font-weight: 900;
  font-family: Arial, sans-serif;
}

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

.score-2, .score-3 {
  color: #333;
}

.ai-summary {
  display: flex;
  align-items: flex-start;
  padding: 20rpx 24rpx;
  background: linear-gradient(135deg, #fbfaff, #f4efff);
  border: 2rpx solid #e0d6ff;
  border-radius: 20rpx;
  margin-bottom: 24rpx;
  box-shadow: 0 4rpx 16rpx rgba(123, 70, 241, 0.05);
}

.ai-icon {
  width: 32rpx;
  height: 32rpx;
  margin-right: 12rpx;
  margin-top: 4rpx;
  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: 26rpx;
  line-height: 1.6;
}

.summary-label {
  color: #7b46f1;
  font-weight: bold;
}

.summary-content {
  color: #444;
}

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

.tag {
  background-color: #f4eaff;
  padding: 6rpx 24rpx;
  border-radius: 100rpx;
}

.tag text {
  color: #9d5bfe;
  font-size: 22rpx;
  font-weight: 500;
}
</style>