<template>
  <div class="trading-overview-card">
    <div class="card-header">
      <div class="title-container">
        <h2 class="card-title">牦牛实时交易概况</h2>
        <div class="title-tibetan">འབྲོག་གཡག་ཉིན་རེའི་ཚོང་འདུས་གནས་སྟངས།</div>
      </div>
    </div>
    
    <div class="overview-content">
      <div class="stats-grid">
        <div class="stat-item">
          <div class="stat-label">
            <span class="chinese">今日入场牦牛数</span>
            <span class="tibetan">དེ་རིང་ཞུགས་པའི་གཡག་གྲངས།</span>
          </div>
          <div class="stat-value primary">{{ todayEntryYaks }}</div>
          <div class="stat-unit">头</div>
        </div>
        
        <div class="stat-item">
          <div class="stat-label">
            <span class="chinese">已交易牦牛数</span>
            <span class="tibetan">ཚོང་བྱས་ཟིན་པའི་གཡག་གྲངས།</span>
          </div>
          <div class="stat-value success">{{ tradedYaks }}</div>
          <div class="stat-unit">头</div>
        </div>
        
        <div class="stat-item">
          <div class="stat-label">
            <span class="chinese">待交易牦牛数</span>
            <span class="tibetan">ཚོང་རྒྱུ་བསྡད་པའི་གཡག་གྲངས།</span>
          </div>
          <div class="stat-value warning">{{ waitingYaks }}</div>
          <div class="stat-unit">头</div>
        </div>
        
        <div class="stat-item">
          <div class="stat-label">
            <span class="chinese">卖家人数</span>
            <span class="tibetan">ཚོང་པའི་མི་གྲངས།</span>
          </div>
          <div class="stat-value info">{{ sellerCount }}</div>
          <div class="stat-unit">人</div>
        </div>
        
        <div class="stat-item">
          <div class="stat-label">
            <span class="chinese">剩余车位</span>
            <span class="tibetan">ལུས་པའི་མོ་ཊ་གནས་སའི་གྲངས།</span>
          </div>
          <div class="stat-value danger">{{ remainingParkingSpots }}</div>
          <div class="stat-unit">个</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, onMounted, onUnmounted } from 'vue'

// 实时交易概况数据
const todayEntryYaks = ref(0)         // 今日入场牦牛数
const tradedYaks = ref(0)            // 已交易牦牛数
const waitingYaks = ref(0)           // 待交易牦牛数
const sellerCount = ref(0)           // 卖家人数
const remainingParkingSpots = ref(0) // 剩余车位

let updateTimer = null

// 加载牦牛实时交易概况数据
const loadTradingOverviewData = async () => {
  try {
    console.log('正在从JSON文件加载牦牛实时交易概况数据...')
    const response = await fetch('/牦牛实时交易概况.json')
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`)
    }
    const data = await response.json()
    
    if (data.牦牛实时交易概况) {
      const overview = data.牦牛实时交易概况
      todayEntryYaks.value = overview.todayEntryYaks || 0
      tradedYaks.value = overview.tradedYaks || 0
      waitingYaks.value = overview.waitingYaks || 0
      sellerCount.value = overview.sellerCount || 0
      remainingParkingSpots.value = overview.remainingParkingSpots || 0
      console.log('成功加载牦牛实时交易概况数据')
    } else {
      throw new Error('牦牛实时交易概况数据格式不正确')
    }
  } catch (error) {
    console.error('加载牦牛实时交易概况数据失败，使用默认数据:', error)
    loadDefaultTradingData()
  }
}

// 加载默认数据（作为备用方案）
const loadDefaultTradingData = () => {
  todayEntryYaks.value = 1256
  tradedYaks.value = 847
  waitingYaks.value = 409
  sellerCount.value = 168
  remainingParkingSpots.value = 32
}

// 模拟数据更新
const startDataUpdate = () => {
  updateTimer = setInterval(() => {
    // 随机增加入场牦牛数
    const newEntry = Math.floor(Math.random() * 5)
    todayEntryYaks.value += newEntry
    
    // 随机交易一些牦牛
    const newTrades = Math.floor(Math.random() * 3)
    if (waitingYaks.value >= newTrades) {
      tradedYaks.value += newTrades
      waitingYaks.value -= newTrades
    }
    
    // 更新待交易数量（新入场 - 新交易）
    waitingYaks.value += (newEntry - newTrades)
    if (waitingYaks.value < 0) waitingYaks.value = 0
    
    // 偶尔更新卖家人数和车位
    if (Math.random() > 0.7) {
      sellerCount.value += Math.floor(Math.random() * 3) - 1 // -1到1的变化
      remainingParkingSpots.value += Math.floor(Math.random() * 5) - 2 // -2到2的变化
      
      // 确保数值合理
      if (sellerCount.value < 100) sellerCount.value = 100
      if (sellerCount.value > 300) sellerCount.value = 300
      if (remainingParkingSpots.value < 0) remainingParkingSpots.value = 0
      if (remainingParkingSpots.value > 50) remainingParkingSpots.value = 50
    }
  }, 30000) // 30秒更新一次
}

onMounted(async () => {
  await loadTradingOverviewData()
  startDataUpdate()
})

onUnmounted(() => {
  if (updateTimer) {
    clearInterval(updateTimer)
    updateTimer = null
  }
})
</script>

<style scoped>
.trading-overview-card {
  height: 100%;
  background: rgba(15, 25, 45, 0.4);
  backdrop-filter: blur(20px) saturate(180%);
  border-radius: 32px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: 
    0 16px 64px rgba(0, 0, 0, 0.3),
    0 8px 32px rgba(64, 158, 255, 0.1),
    inset 0 2px 0 rgba(255, 255, 255, 0.1);
}

.card-header {
  margin-bottom: 40px;
}

.title-container {
  display: flex;
  align-items: center;
  gap: 32px;
}

.card-title {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #409EFF 0%, #67C23A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  text-align: left;
}

.title-tibetan {
  font-size: 28px;
  color: #67C23A;
  font-weight: 600;
  opacity: 0.8;
}

.overview-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  flex: 1;
}

.stat-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 24px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
}

.stat-label {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-label .chinese {
  font-size: 28px;
  color: #ffffff;
  font-weight: 600;
  line-height: 1.2;
}

.stat-label .tibetan {
  font-size: 28px;
  color: #67C23A;
  opacity: 0.8;
  line-height: 1.2;
}

.stat-value {
  font-size: 64px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1;
}

.stat-value.primary {
  color: #409EFF;
}

.stat-value.success {
  color: #67C23A;
}

.stat-value.warning {
  color: #E6A23C;
}

.stat-value.danger {
  color: #F56C6C;
}

.stat-value.info {
  color: #17A2B8;
}

.stat-unit {
  font-size: 32px;
  color: #a0a8b8;
  margin-top: 8px;
}
</style> 