VeloeKemonoPartyFlutter/lib/pages/widgets/video_preview.dart

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:veloe_kemono_party_flutter/video_thumbnail_generator';
import '../../main.dart';

class VideoPreview extends StatefulWidget {
  final String videoUrl;
  final VoidCallback onTap;
  
  const VideoPreview({
    super.key,
    required this.videoUrl,
    required this.onTap,
  });

  @override
  State<VideoPreview> createState() => _VideoPreviewState();
}

class _VideoPreviewState extends State<VideoPreview> {
  Future<Uint8List?>? _thumbnailFuture;
  bool _isGenerating = false;
  bool _isCached = false;

  @override
  void initState() {
    super.initState();
    _checkCacheStatus();
    _loadThumbnail();
  }

  void _loadThumbnail() {
    setState(() => _isGenerating = true);
    _thumbnailFuture = VideoThumbnailGenerator.getFirstFrameThumbnail(widget.videoUrl)
      .whenComplete(() => setState(() => _isGenerating = false));
  }

  Future<void> _checkCacheStatus() async {
  final cachedFile = await videoCacheManager.getFileFromCache(widget.videoUrl);
  if (cachedFile != null && mounted) {
    setState(() => _isCached = true);
  }
}

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: widget.onTap,
      child: FutureBuilder<Uint8List?>(
        future: _thumbnailFuture,
        builder: (context, snapshot) {
          return AspectRatio(
            aspectRatio: 16/9,
            child: Stack(
              fit: StackFit.expand,
              children: [
                // Thumbnail display
                if (snapshot.hasData)
                  Image.memory(snapshot.data!, fit: BoxFit.cover)
                else if (_isGenerating)
                  const Center(child: CircularProgressIndicator())
                else
                  Container(color: Colors.black),
                
                // Play button overlay
                const Center(
                  child: Icon(Icons.play_circle_filled,
                    size: 64,
                    color: Colors.white70,
                  ),
                ),
                
                // Video indicator
                Positioned(
                  bottom: 8,
                  right: 8,
                  child: Container(
                    padding: const EdgeInsets.all(4),
                    color: Colors.black54,
                    child: const Text('VIDEO',
                      style: TextStyle(color: Colors.white)),
                  ),
                ),
                if (_isCached)
                  Positioned(
                    top: 8,
                    right: 8,
                    child: Container(
                      padding: const EdgeInsets.all(4),
                      decoration: const BoxDecoration(
                        color: Colors.green,
                        shape: BoxShape.circle,
                      ),
                      child: const Icon(Icons.download_done, size: 16, color: Colors.white),
                    ),
                  ),
              ],
            ),
          );
        },
      ),
    );
  }
}