import React, { useState, useCallback } from 'react';
import {
  ExternalLink,
  Tag,
  Image as ImageIcon,
  TrendingUp
} from 'lucide-react';
import { SimilaritySearchCardProps } from '../../types/similaritySearch';
import SimilaritySearchService from '../../services/similaritySearchService';

/**
 * 相似度检索结果卡片组件
 * 遵循设计系统规范，提供统一的结果展示界面
 */
export const SimilaritySearchCard: React.FC<SimilaritySearchCardProps> = ({
  result,
  onSelect,
  onExternalLinkClick,
  showScore = true,
  compact = false,
}) => {
  const [imageLoaded, setImageLoaded] = useState(false);
  const [imageError, setImageError] = useState(false);

  // 处理卡片点击
  const handleCardClick = useCallback((e: React.MouseEvent) => {
    // 如果点击的是按钮或其子元素，不触发卡片选择
    const target = e.target as HTMLElement;
    if (target.closest('button')) {
      return;
    }

    if (onSelect) {
      onSelect(result);
    }
  }, [result, onSelect]);

  // 处理外部链接点击
  const handleExternalClick = useCallback((e: React.MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();
    if (result.image_url) {
      if (onExternalLinkClick) {
        onExternalLinkClick(result.image_url);
      } else {
        window.open(result.image_url, '_blank', 'noopener,noreferrer');
      }
    }
  }, [result.image_url, onExternalLinkClick]);

  // 处理图片加载
  const handleImageLoad = useCallback(() => {
    setImageLoaded(true);
  }, []);

  // 处理图片错误
  const handleImageError = useCallback(() => {
    setImageError(true);
    setImageLoaded(true);
  }, []);

  // 获取相关性评分样式
  const scoreColor = SimilaritySearchService.getRelevanceScoreColor(result.relevance_score);
  const formattedScore = SimilaritySearchService.formatRelevanceScore(result.relevance_score);

  return (
    <div
      className={`
        card card-interactive group cursor-pointer animate-fade-in-up
        relative overflow-hidden bg-gradient-to-br from-white to-gray-50/50
        hover:from-white hover:to-primary-50/30 transition-all duration-500
        hover:shadow-lg hover:shadow-primary-500/10 hover:-translate-y-1
        border border-gray-200 hover:border-primary-300
        ${compact ? 'p-4' : 'p-6'}
      `}
      onClick={handleCardClick}
    >
      {/* 装饰性背景 */}
      <div className="absolute top-0 right-0 w-24 h-24 bg-gradient-to-br from-primary-100 to-primary-200 rounded-full -translate-y-12 translate-x-12 opacity-40 group-hover:opacity-60 transition-all duration-500 group-hover:scale-110"></div>

      {/* 相关性评分 */}
      {showScore && (
        <div className="absolute top-3 right-3 z-10">
          <div className={`px-2 py-1 rounded-full text-xs font-medium bg-white shadow-sm border ${scoreColor}`}>
            <div className="flex items-center gap-1">
              <TrendingUp className="w-3 h-3" />
              {formattedScore}
            </div>
          </div>
        </div>
      )}

      <div className="relative">
        {/* 图片区域 */}
        <div className={`relative ${compact ? 'h-32' : 'h-40'} bg-gray-100 rounded-lg overflow-hidden mb-4`}>
          {result.image_url && !imageError ? (
            <>
              <img
                src={result.image_url}
                alt={result.style_description}
                className={`w-full h-full object-cover transition-all duration-300 ${
                  imageLoaded ? 'opacity-100' : 'opacity-0'
                }`}
                onLoad={handleImageLoad}
                onError={handleImageError}
              />
              {!imageLoaded && (
                <div className="absolute inset-0 flex items-center justify-center">
                  <div className="w-8 h-8 border-2 border-primary-500 border-t-transparent rounded-full animate-spin"></div>
                </div>
              )}
            </>
          ) : (
            <div className="w-full h-full flex items-center justify-center text-gray-400">
              <ImageIcon className="w-8 h-8" />
            </div>
          )}
          
          {/* 外部链接按钮 */}
          {result.image_url && (
            <button
              onClick={handleExternalClick}
              className="absolute top-2 left-2 p-1.5 bg-white/90 hover:bg-white rounded-lg shadow-sm transition-all duration-200 opacity-0 group-hover:opacity-100"
            >
              <ExternalLink className="w-3 h-3 text-gray-600" />
            </button>
          )}
        </div>

        {/* 内容区域 */}
        <div className="space-y-3">
          {/* 标题和描述 */}
          <div>
            <h3 className={`font-semibold text-high-emphasis line-clamp-2 ${
              compact ? 'text-sm' : 'text-base'
            }`}>
              {result.style_description || '未知风格'}
            </h3>
          </div>

          {/* 环境标签 */}
          {result.environment_tags && result.environment_tags.length > 0 && (
            <div className="flex flex-wrap gap-1">
              {result.environment_tags.slice(0, compact ? 2 : 3).map((tag: string, index: number) => (
                <span
                  key={index}
                  className="inline-flex items-center gap-1 px-2 py-1 bg-blue-100 text-blue-700 text-xs rounded-full"
                >
                  <Tag className="w-2.5 h-2.5" />
                  {tag}
                </span>
              ))}
              {result.environment_tags.length > (compact ? 2 : 3) && (
                <span className="inline-flex items-center px-2 py-1 bg-gray-100 text-gray-600 text-xs rounded-full">
                  +{result.environment_tags.length - (compact ? 2 : 3)}
                </span>
              )}
            </div>
          )}

          {/* 产品信息 */}
          {result.products && result.products.length > 0 && (
            <div className="space-y-2">
              <div className="text-xs text-medium-emphasis font-medium">产品信息</div>
              <div className="space-y-1">
                {result.products.slice(0, compact ? 1 : 2).map((product: any, index: number) => (
                  <div key={index} className="text-xs text-gray-600">
                    <span className="font-medium">{product.category}</span>
                    {product.description && (
                      <span className="ml-2 text-gray-500 line-clamp-1">
                        {product.description}
                      </span>
                    )}
                  </div>
                ))}
                {result.products.length > (compact ? 1 : 2) && (
                  <div className="text-xs text-gray-500">
                    还有 {result.products.length - (compact ? 1 : 2)} 个产品...
                  </div>
                )}
              </div>
            </div>
          )}
        </div>

        {/* 悬停效果 */}
        <div className="absolute inset-0 bg-gradient-to-br from-transparent via-transparent to-primary-50/20 opacity-0 group-hover:opacity-100 transition-opacity duration-500 rounded-lg"></div>
      </div>
    </div>
  );
};

export default SimilaritySearchCard;