// device_usage.dart — 单设备窗口用量(GET /v1/usage/devices?days=N 的一条)。
// 统计页「下分设备」明细的数据载体,与账户聚合的 UsagePoint 对应。
class DeviceUsage {
  const DeviceUsage({
    required this.uuid,
    required this.name,
    required this.platform,
    this.bytesUp = 0,
    this.bytesDown = 0,
    this.minutesUsed = 0,
  });

  final String uuid;
  final String name;

  /// ios | android | windows | macos。
  final String platform;
  final int bytesUp;
  final int bytesDown;
  final int minutesUsed;

  int get bytesTotal => bytesUp + bytesDown;
  double get gbTotal => bytesTotal / (1024 * 1024 * 1024);

  factory DeviceUsage.fromJson(Map<String, dynamic> m) => DeviceUsage(
        uuid: m['uuid'] as String? ?? '',
        name: m['name'] as String? ?? '',
        platform: m['platform'] as String? ?? '',
        bytesUp: (m['bytes_up'] as num?)?.toInt() ?? 0,
        bytesDown: (m['bytes_down'] as num?)?.toInt() ?? 0,
        minutesUsed: (m['minutes_used'] as num?)?.toInt() ?? 0,
      );
}