/// 媒体项：reconfigure=imgUrl，类型由 reconnect(imgType) 决定：0=视频，1=图片，其他当图片
class GalleryMediaItem {
  const GalleryMediaItem({
    this.imageUrl,
    this.videoUrl,
  }) : assert(imageUrl != null || videoUrl != null);

  final String? imageUrl;
  final String? videoUrl; // 视频地址，用于生成封面

  /// reconnect==0 为视频，1 或其他为图片
  bool get isVideo =>
      videoUrl != null && (imageUrl == null || imageUrl!.isEmpty);
}

/// 我的任务项（V2 字段映射）
class GalleryTaskItem {
  const GalleryTaskItem({
    required this.taskId,
    required this.state,
    required this.taskType,
    required this.createTime,
    required this.mediaItems,
  });

  final int taskId;
  final String state;
  final int taskType;
  final int createTime;
  final List<GalleryMediaItem> mediaItems;

  factory GalleryTaskItem.fromJson(Map<String, dynamic> json) {
    final downsample = json['downsample'] as List<dynamic>? ?? [];
    final items = <GalleryMediaItem>[];
    for (final item in downsample) {
      if (item is String) {
        items.add(GalleryMediaItem(imageUrl: item));
      } else if (item is Map<String, dynamic>) {
        final reconfigure = item['reconfigure'] as String?;
        if (reconfigure == null || reconfigure.isEmpty) continue;
        // reconnect(imgType): 0=视频，1=图片，其他默认当图片
        final reconnect = item['reconnect'];
        final imgType = reconnect is int
            ? reconnect
            : reconnect is num
                ? reconnect.toInt()
                : 1;
        if (imgType == 2) {
          items.add(GalleryMediaItem(videoUrl: reconfigure));
        } else {
          items.add(GalleryMediaItem(imageUrl: reconfigure));
        }
      }
    }
    return GalleryTaskItem(
      taskId: (json['tree'] as num?)?.toInt() ?? 0,
      state: json['listing']?.toString() ?? '',
      taskType: (json['cipher'] as num?)?.toInt() ?? 0,
      createTime: (json['discover'] as num?)?.toInt() ?? 0,
      mediaItems: items,
    );
  }
}