chat/client/flutter/lib/models/group.dart

class Group {
  final String id;
  final String name;
  final String? avatar;
  final String? description;
  final String? owner;
  final List<GroupMember> members;
  final List<GroupPanel> panels;
  final DateTime? createdAt;
  final DateTime? updatedAt;

  Group({
    required this.id,
    required this.name,
    this.avatar,
    this.description,
    this.owner,
    this.members = const [],
    this.panels = const [],
    this.createdAt,
    this.updatedAt,
  });

  factory Group.fromJson(Map<String, dynamic> json) {
    return Group(
      id: (json['_id'] ?? json['id'] ?? '').toString(),
      name: json['name'] ?? '',
      avatar: json['avatar'],
      description: json['description'],
      owner: json['owner']?.toString(),
      members: (json['members'] as List?)
              ?.map((e) => GroupMember.fromJson(e))
              .toList() ??
          [],
      panels: (json['panels'] as List?)
              ?.map((e) => GroupPanel.fromJson(e))
              .toList() ??
          [],
      createdAt: json['createdAt'] != null
          ? DateTime.parse(json['createdAt'].toString())
          : null,
      updatedAt: json['updatedAt'] != null
          ? DateTime.parse(json['updatedAt'].toString())
          : null,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      '_id': id,
      'name': name,
      'avatar': avatar,
      'description': description,
      'owner': owner,
      'members': members.map((e) => e.toJson()).toList(),
      'panels': panels.map((e) => e.toJson()).toList(),
      'createdAt': createdAt?.toIso8601String(),
      'updatedAt': updatedAt?.toIso8601String(),
    };
  }

  /// 群组成员数量
  int get memberCount => members.length;

  /// 获取第一个文本面板（频道）用于聊天
  GroupPanel? get firstTextPanel {
    try {
      return panels.firstWhere((p) => p.type == 0);
    } catch (_) {
      return panels.isNotEmpty ? panels.first : null;
    }
  }
}

class GroupMember {
  final String? userId;
  final List<String>? roles;
  final DateTime? muteUntil;

  GroupMember({
    this.userId,
    this.roles,
    this.muteUntil,
  });

  factory GroupMember.fromJson(Map<String, dynamic> json) {
    return GroupMember(
      userId: json['userId']?.toString(),
      roles: (json['roles'] as List?)?.map((e) => e.toString()).toList(),
      muteUntil: json['muteUntil'] != null
          ? DateTime.parse(json['muteUntil'].toString())
          : null,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'userId': userId,
      'roles': roles,
      'muteUntil': muteUntil?.toIso8601String(),
    };
  }
}

/// 群组面板类型：
///   0 = 文本频道
///   1 = 面板组（文件夹）
///   2 = 插件面板
class GroupPanel {
  final String id;
  final String name;
  final String? parentId;
  final int type;
  final String? provider;
  final String? pluginPanelName;
  final Map<String, dynamic>? meta;

  GroupPanel({
    required this.id,
    required this.name,
    this.parentId,
    this.type = 0,
    this.provider,
    this.pluginPanelName,
    this.meta,
  });

  factory GroupPanel.fromJson(Map<String, dynamic> json) {
    return GroupPanel(
      id: (json['id'] ?? '').toString(),
      name: json['name'] ?? '',
      parentId: json['parentId']?.toString(),
      type: json['type'] ?? 0,
      provider: json['provider'],
      pluginPanelName: json['pluginPanelName'],
      meta: json['meta'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'name': name,
      'parentId': parentId,
      'type': type,
      'provider': provider,
      'pluginPanelName': pluginPanelName,
      'meta': meta,
    };
  }
}

/// getGroupBasicInfo 返回的基本群组信息
class GroupBasicInfo {
  final String groupId;
  final String name;
  final String? avatar;
  final String? description;
  final int memberCount;
  final String? backgroundImage;

  GroupBasicInfo({
    required this.groupId,
    required this.name,
    this.avatar,
    this.description,
    this.memberCount = 0,
    this.backgroundImage,
  });

  factory GroupBasicInfo.fromJson(Map<String, dynamic> json) {
    return GroupBasicInfo(
      groupId: (json['groupId'] ?? '').toString(),
      name: json['name'] ?? '',
      avatar: json['avatar'],
      description: json['description'],
      memberCount: json['memberCount'] ?? 0,
      backgroundImage: json['backgroundImage'],
    );
  }
}