/// 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,
    this.taskId,
  }) : assert(imageUrl != null || videoUrl != null);

  final String? imageUrl;
  final String? videoUrl;
  /// 与列表项 `tree` 一致，用于匹配本地上传封面缓存
  final int? taskId;

  /// 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 treeRaw = json['tree'] as num?;
    final treeId = treeRaw?.toInt() ?? 0;
    final itemTaskId = treeId > 0 ? treeId : null;
    final downsample = json['downsample'] as List<dynamic>? ?? [];
    final items = <GalleryMediaItem>[];
    // 只取downsample的array[0]
    if (downsample.isNotEmpty) {
      final first = downsample[0];
      if (first is String) {
        items.add(GalleryMediaItem(imageUrl: first, taskId: itemTaskId));
      } else if (first is Map<String, dynamic>) {
        final reconfigure = first['reconfigure'] as String?;
        if (reconfigure != null && reconfigure.isNotEmpty) {
          final reconnect = first['reconnect'];
          final imgType = reconnect is int
              ? reconnect
              : reconnect is num
                  ? reconnect.toInt()
                  : 1;
          if (imgType == 2) {
            items.add(GalleryMediaItem(
              videoUrl: reconfigure,
              taskId: itemTaskId,
            ));
          } else {
            items.add(GalleryMediaItem(
              imageUrl: reconfigure,
              taskId: itemTaskId,
            ));
          }
        }
      }
      // 后续下标均忽略
    }
    // 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: treeId,
      state: json['listing']?.toString() ?? '',
      taskType: (json['cipher'] as num?)?.toInt() ?? 0,
      createTime: (json['discover'] as num?)?.toInt() ?? 0,
      mediaItems: items,
    );
  }
}