// ============================================================
// 闲言APP — 精灵图动画贴纸数据模型
// 创建时间: 2026-04-29
// 更新时间: 2026-04-29
// 作用: 定义精灵图贴纸和表情包的数据结构
// 上次更新: 初始创建
// ============================================================

/// 精灵图贴纸来源
enum SpritesheetSource {
  builtin('builtin', '内置'),
  local('local', '本地导入'),
  remote('remote', '远程下载');

  const SpritesheetSource(this.key, this.label);
  final String key;
  final String label;
}

/// 精灵图贴纸 — 单个动画贴纸
class SpritesheetSticker {
  const SpritesheetSticker({
    required this.id,
    required this.name,
    required this.emoji,
    required this.source,
    required this.imageUri,
    required this.frameWidth,
    required this.frameHeight,
    required this.totalFrames,
    this.fps = 12,
    this.loop = true,
    this.packId,
    this.thumbnailUri,
    this.columns,
    this.rows,
  });

  final String id;
  final String name;
  final String emoji;
  final SpritesheetSource source;
  final String imageUri;
  final int frameWidth;
  final int frameHeight;
  final int totalFrames;
  final int fps;
  final bool loop;
  final String? packId;
  final String? thumbnailUri;
  final int? columns;
  final int? rows;

  /// 推算列数：优先用 columns，否则假设单行排列
  int get effectiveColumns => columns ?? totalFrames;

  /// 推算行数：优先用 rows，否则为1
  int get effectiveRows => rows ?? 1;

  factory SpritesheetSticker.fromJson(Map<String, dynamic> json) {
    return SpritesheetSticker(
      id: json['id'] as String,
      name: json['name'] as String,
      emoji: json['emoji'] as String? ?? '🎭',
      source: SpritesheetSource.values.firstWhere(
        (s) => s.key == json['source'],
        orElse: () => SpritesheetSource.builtin,
      ),
      imageUri: json['imageUri'] as String,
      frameWidth: json['frameWidth'] as int,
      frameHeight: json['frameHeight'] as int,
      totalFrames: json['totalFrames'] as int,
      fps: json['fps'] as int? ?? 12,
      loop: json['loop'] as bool? ?? true,
      packId: json['packId'] as String?,
      thumbnailUri: json['thumbnailUri'] as String?,
      columns: json['columns'] as int?,
      rows: json['rows'] as int?,
    );
  }

  Map<String, dynamic> toJson() => {
    'id': id,
    'name': name,
    'emoji': emoji,
    'source': source.key,
    'imageUri': imageUri,
    'frameWidth': frameWidth,
    'frameHeight': frameHeight,
    'totalFrames': totalFrames,
    'fps': fps,
    'loop': loop,
    'packId': packId,
    'thumbnailUri': thumbnailUri,
    'columns': columns,
    'rows': rows,
  };

  SpritesheetSticker copyWith({
    String? id,
    String? name,
    String? emoji,
    SpritesheetSource? source,
    String? imageUri,
    int? frameWidth,
    int? frameHeight,
    int? totalFrames,
    int? fps,
    bool? loop,
    String? packId,
    String? thumbnailUri,
    int? columns,
    int? rows,
  }) {
    return SpritesheetSticker(
      id: id ?? this.id,
      name: name ?? this.name,
      emoji: emoji ?? this.emoji,
      source: source ?? this.source,
      imageUri: imageUri ?? this.imageUri,
      frameWidth: frameWidth ?? this.frameWidth,
      frameHeight: frameHeight ?? this.frameHeight,
      totalFrames: totalFrames ?? this.totalFrames,
      fps: fps ?? this.fps,
      loop: loop ?? this.loop,
      packId: packId ?? this.packId,
      thumbnailUri: thumbnailUri ?? this.thumbnailUri,
      columns: columns ?? this.columns,
      rows: rows ?? this.rows,
    );
  }
}

/// 表情包 — 一组精灵图贴纸
class StickerPack {
  const StickerPack({
    required this.id,
    required this.name,
    required this.icon,
    required this.source,
    required this.stickers,
    this.coverUri,
    this.downloadUrl,
    this.fileSize,
    this.isDownloaded = false,
  });

  final String id;
  final String name;
  final String icon;
  final SpritesheetSource source;
  final List<SpritesheetSticker> stickers;
  final String? coverUri;
  final String? downloadUrl;
  final int? fileSize;
  final bool isDownloaded;

  factory StickerPack.fromJson(Map<String, dynamic> json) {
    return StickerPack(
      id: json['id'] as String,
      name: json['name'] as String,
      icon: json['icon'] as String? ?? '🎭',
      source: SpritesheetSource.values.firstWhere(
        (s) => s.key == json['source'],
        orElse: () => SpritesheetSource.builtin,
      ),
      stickers:
          (json['stickers'] as List?)
              ?.map(
                (s) => SpritesheetSticker.fromJson(s as Map<String, dynamic>),
              )
              .toList() ??
          [],
      coverUri: json['coverUri'] as String?,
      downloadUrl: json['downloadUrl'] as String?,
      fileSize: json['fileSize'] as int?,
      isDownloaded: json['isDownloaded'] as bool? ?? false,
    );
  }

  Map<String, dynamic> toJson() => {
    'id': id,
    'name': name,
    'icon': icon,
    'source': source.key,
    'stickers': stickers.map((s) => s.toJson()).toList(),
    'coverUri': coverUri,
    'downloadUrl': downloadUrl,
    'fileSize': fileSize,
    'isDownloaded': isDownloaded,
  };

  StickerPack copyWith({
    String? id,
    String? name,
    String? icon,
    SpritesheetSource? source,
    List<SpritesheetSticker>? stickers,
    String? coverUri,
    String? downloadUrl,
    int? fileSize,
    bool? isDownloaded,
  }) {
    return StickerPack(
      id: id ?? this.id,
      name: name ?? this.name,
      icon: icon ?? this.icon,
      source: source ?? this.source,
      stickers: stickers ?? this.stickers,
      coverUri: coverUri ?? this.coverUri,
      downloadUrl: downloadUrl ?? this.downloadUrl,
      fileSize: fileSize ?? this.fileSize,
      isDownloaded: isDownloaded ?? this.isDownloaded,
    );
  }
}