Merge/front/src/components/MediaPreview.jsx

import React, { useState } from 'react'
import VideoPreview from './VideoPreview'
import { Play } from 'lucide-react'

// 判断文件是否为视频
const isVideoFile = (url) => {
  if (!url) return false
  const videoExtensions = ['.mp4', '.webm', '.ogg', '.avi', '.mov', '.wmv', '.flv', '.mkv']
  const lowerUrl = url.toLowerCase()
  return videoExtensions.some(ext => lowerUrl.includes(ext)) || lowerUrl.includes('video')
}

// 媒体预览组件（支持图片和视频）
const MediaPreview = ({ 
  url, 
  alt = '', 
  className = '', 
  style = {}, 
  onClick = null,
  showPlayIcon = true,
  maxWidth = 220,
  maxHeight = 220 
}) => {
  const [showVideoPreview, setShowVideoPreview] = useState(false)
  
  const handleMediaClick = () => {
    if (isVideoFile(url)) {
      setShowVideoPreview(true)
    } else if (onClick) {
      onClick(url)
    }
  }

  const defaultStyle = {
    maxWidth,
    maxHeight,
    borderRadius: 8,
    objectFit: 'cover',
    cursor: 'pointer',
    ...style
  }

  if (isVideoFile(url)) {
    return (
      <>
        <div style={{ position: 'relative', ...defaultStyle }} onClick={handleMediaClick}>
          <video
            src={url}
            style={defaultStyle}
            preload="metadata"
            muted
          />
          {showPlayIcon && (
            <div style={{
              position: 'absolute',
              top: '50%',
              left: '50%',
              transform: 'translate(-50%, -50%)',
              background: 'rgba(0,0,0,0.6)',
              borderRadius: '50%',
              padding: 12,
              color: 'white'
            }}>
              <Play size={24} fill="white" />
            </div>
          )}
        </div>
        
        {/* 视频预览弹窗 */}
        {showVideoPreview && (
          <div 
            style={{
              position: 'fixed',
              zIndex: 9999,
              top: 0,
              left: 0,
              right: 0,
              bottom: 0,
              background: 'rgba(0,0,0,0.8)',
              display: 'flex',
              alignItems: 'center',
              justifyContent: 'center',
              padding: 20
            }}
            onClick={() => setShowVideoPreview(false)}
          >
            <div 
              style={{ 
                maxWidth: '90vw', 
                maxHeight: '90vh', 
                width: 'auto', 
                height: 'auto' 
              }}
              onClick={(e) => e.stopPropagation()}
            >
              <VideoPreview
                src={url}
                onClose={() => setShowVideoPreview(false)}
                style={{ borderRadius: 12, overflow: 'hidden' }}
              />
            </div>
          </div>
        )}
      </>
    )
  }

  return (
    <img
      src={url}
      alt={alt}
      className={className}
      style={defaultStyle}
      onClick={handleMediaClick}
    />
  )
}

export default MediaPreview