<script setup lang="ts">
import { ref, onMounted, watch } from 'vue';
import QRCode from 'qrcode';

const props = defineProps({
  title: {
    type: String,
    required: true
  },
  url: {
    type: String,
    required: true
  },
  id: {
    type: String,
    required: true
  }
});

const qrcodeEl = ref<HTMLElement | null>(null);
const qrcodeImgUrl = ref('');
const isLoading = ref(true);

// 获取显示友好的URL
const getDisplayUrl = (url: string): string => {
  try {
    // 从URL中提取完整URL，不再截断
    const urlObj = new URL(url);
    return url;
  } catch (e) {
    // 如果URL格式不正确，则显示完整URL
    return url;
  }
};

const generateQRCode = async (url: string) => {
  if (!url) {
    console.warn('QRCodeDisplay: URL 为空，无法生成二维码。');
    qrcodeImgUrl.value = ''; // 清空图片，显示备用文本
    return;
  }
  try {
    isLoading.value = true;
    console.log('QRCodeDisplay: 尝试生成二维码，URL:', url);
    qrcodeImgUrl.value = await QRCode.toDataURL(url, {
      width: 180,
      margin: 1,
      errorCorrectionLevel: 'H',
      color: {
        dark: '#000000',
        light: '#ffffff'
      }
    });
    console.log('QRCodeDisplay: 二维码生成成功，URL数据:', qrcodeImgUrl.value.substring(0, 50) + '...');
  } catch (error) {
    console.error('QRCodeDisplay: 生成二维码失败:', error);
    qrcodeImgUrl.value = `https://api.qrserver.com/v1/create-qr-code/?size=180x180&data=${encodeURIComponent(url)}`;
    console.log('QRCodeDisplay: 二维码生成失败，使用备用URL:', qrcodeImgUrl.value.substring(0, 50) + '...');
  } finally {
    isLoading.value = false;
  }
};

onMounted(() => {
  generateQRCode(props.url);
});

// 监听 props.url 的变化，并在变化时重新生成二维码
watch(() => props.url, (newUrl) => {
  generateQRCode(newUrl);
}, { immediate: true }); // immediate: true 确保在组件挂载时也立即执行一次

const onDownload = () => {
  try {
    if (!qrcodeImgUrl.value) {
      throw new Error('二维码图片不存在');
    }
    
    // 创建下载链接
    const link = document.createElement('a');
    link.download = `${props.title}-${props.id}.png`;
    link.href = qrcodeImgUrl.value;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  } catch (error) {
    console.error('下载二维码失败:', error);
    alert('下载二维码失败，请稍后重试');
  }
};
</script>

<template>
  <div class="qrcode-item">
    <div class="qrcode-wrapper">
      <div v-if="isLoading" class="loading-overlay">
        <div class="spinner"></div>
      </div>
      <div v-else class="qrcode">
        <img v-if="qrcodeImgUrl" :src="qrcodeImgUrl" :alt="title" />
        <p v-else class="qr-code-fallback">二维码加载失败</p>
      </div>
    </div>
    <div class="qrcode-info">
      <h4>{{ title }}</h4>
      <div class="qr-url-hint">{{ getDisplayUrl(url) }}</div>
      <div class="qrcode-controls">
        <div class="id-container">
          <span class="id-label">编号:</span>
          <span class="id-value" :title="id">{{ id }}</span>
        </div>
        <button @click="onDownload" class="btn-download" :title="`下载${title}二维码`">
          <span class="icon-download"></span>
        </button>
      </div>
    </div>
  </div>
</template>

<style scoped>
.qrcode {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: white;
  border-radius: 4px;
  overflow: hidden;
}

.qr-code-fallback {
  text-align: center;
  color: #999;
  font-size: 0.9em;
}

.qrcode img {
  max-width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s;
}

.qrcode-item {
  background-color: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: all 0.4s ease;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid #f0f0f0;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}

.qrcode-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
  border-color: rgba(0, 123, 255, 0.3);
}

.qrcode-item:hover::before {
  transform: translateY(0);
}

.qrcode-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.qrcode-item:hover::after {
  opacity: 1;
}

.qrcode-item::after {
  content: '扫码访问';
  position: absolute;
  top: -10px;
  right: -10px;
  background-color: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 2;
  box-shadow: 0 3px 6px rgba(0, 123, 255, 0.2);
}

.qrcode-item:hover::after {
  transform: translateY(5px);
}

.qrcode-wrapper {
  width: 160px;
  height: 160px;
  position: relative;
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px dashed #eee;
  border-radius: 4px;
  padding: 5px;
  background-color: #fafafa;
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 4px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.qrcode-info {
  width: 100%;
  text-align: center;
}

.qrcode-info h4 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.qrcode-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
  background-color: #f8f9fa;
  padding: 0.5rem 0.8rem;
  border-radius: 30px;
  margin-top: 0.8rem;
  width: 100%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
  transition: all 0.3s;
}

.qrcode-item:hover .qrcode-controls {
  background-color: #f0f8ff;
  box-shadow: 0 2px 8px rgba(0, 123, 255, 0.1);
}

.qr-url-hint {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
  word-break: break-all;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  background-color: #f8f9fa;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  text-align: left;
  max-height: 3.5rem;
  overflow-y: auto;
  margin-bottom: 0.8rem;
}

.id-container {
  display: flex;
  align-items: center;
  width: 70%;
  overflow: hidden;
}

.id-label {
  flex-shrink: 0;
  margin-right: 0.3rem;
}

.id-value {
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 80%;
}

.btn-download {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  padding: 0.4rem;
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 5px;
  position: relative;
  overflow: hidden;
}

.btn-download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-primary);
  transform: translateY(100%);
  transition: transform 0.3s ease;
  z-index: -1;
}

.btn-download:hover {
  color: white;
  transform: scale(1.1);
  box-shadow: 0 3px 6px rgba(0, 123, 255, 0.3);
}

.btn-download:hover::before {
  transform: translateY(0);
}

.btn-download:active {
  transform: scale(0.95);
}

.icon-download {
  position: relative;
  width: 18px;
  height: 18px;
}

.icon-download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 12px;
  border: 2px solid currentColor;
  border-bottom: none;
}

.icon-download::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 8px solid currentColor;
}

@media (min-width: 1200px) {
  .qrcode-item {
    max-width: 300px;
  }
  
  .qrcode-wrapper {
    width: 180px;
    height: 180px;
  }
  
  .qrcode-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
  }
}

@media (max-width: 992px) {
  .qrcode-item {
    max-width: 280px;
  }
  
  .qrcode-wrapper {
    width: 160px;
    height: 160px;
  }
}

@media (max-width: 576px) {
  .qrcode-item {
    max-width: 250px;
    padding: 0.8rem;
  }
  
  .qrcode-wrapper {
    width: 140px;
    height: 140px;
    margin-bottom: 0.8rem;
  }
  
  .qrcode-info h4 {
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
  }
  
  .qrcode-controls {
    font-size: 0.75rem;
  }
}

@media (max-width: 360px) {
  .qrcode-item {
    max-width: 200px;
    padding: 0.7rem;
  }
  
  .qrcode-wrapper {
    width: 130px;
    height: 130px;
  }
}
</style> 