// device.dart — 已登录设备(GET /v1/me/devices)。

/// 设备平台。线格式是字符串(与服务端 devices.platform 对齐),在 model 边界经
/// [fromWire] 解析为枚举,UI/逻辑层只碰枚举(穷尽 switch + 拼错编译期报错)。
enum DevicePlatform {
  ios,
  android,
  windows,
  macos,
  linux,
  unknown;

  static DevicePlatform fromWire(String s) => switch (s.toLowerCase().trim()) {
        'ios' => DevicePlatform.ios,
        'android' => DevicePlatform.android,
        'windows' => DevicePlatform.windows,
        'macos' => DevicePlatform.macos,
        'linux' => DevicePlatform.linux,
        _ => DevicePlatform.unknown,
      };

  /// 展示名(大小写规范化)。
  String get label => switch (this) {
        DevicePlatform.ios => 'iOS',
        DevicePlatform.android => 'Android',
        DevicePlatform.windows => 'Windows',
        DevicePlatform.macos => 'macOS',
        DevicePlatform.linux => 'Linux',
        DevicePlatform.unknown => '—',
      };

  bool get isMobile => this == DevicePlatform.ios || this == DevicePlatform.android;
}

class Device {
  const Device({
    required this.uuid,
    required this.name,
    required this.platform,
    this.lastSeen,
    this.clientVersion = '',
    this.online = false,
    this.lastLogin,
  });

  final String uuid;
  final String name;

  /// 平台线格式(原始字符串,保留以便回传/调试)。UI 用 [platformKind]。
  final String platform;

  /// 平台枚举(由线格式解析)。
  DevicePlatform get platformKind => DevicePlatform.fromWire(platform);

  /// 最近活跃(UTC);从未上线为 null。
  final DateTime? lastSeen;

  /// 客户端版本(该设备最近上报),可能为空。
  final String clientVersion;

  /// 在线(数据面活跃,last_seen 在阈值内,由服务端判定)。
  final bool online;

  /// 最后登录时间(最近一次会话创建,UTC);无会话为 null。
  final DateTime? lastLogin;

  factory Device.fromJson(Map<String, dynamic> m) {
    DateTime? parseTs(String key) {
      final s = m[key] as String?;
      return (s != null && s.isNotEmpty) ? DateTime.tryParse(s) : null;
    }

    return Device(
      uuid: m['uuid'] as String? ?? '',
      name: m['name'] as String? ?? '',
      platform: m['platform'] as String? ?? '',
      lastSeen: parseTs('last_seen'),
      clientVersion: m['client_version'] as String? ?? '',
      online: m['online'] as bool? ?? false,
      lastLogin: parseTs('last_login'),
    );
  }
}