/// A data-transfer object representing a driver’s last known coordinates.
///
/// Matches the Java class:

class DriverLocationDto {
  /// The driver’s primary-key ID.
  final int driverId;

  /// Current latitude in WGS-84 (positive = north).
  final double latitude;

  /// Current longitude in WGS-84 (positive = east).
  final double longitude;
  final double? bearing;
  final double? distanceKm;
  final int? etaSeconds;
  const DriverLocationDto({
    required this.driverId,
    required this.latitude,
    required this.longitude,
    this.bearing,
    this.distanceKm,
    this.etaSeconds,
  });

  /* ───────────────────────── JSON helpers ────────────────────────── */

  /// Builds the DTO from a decoded JSON map (`Map<String,dynamic>`).
  factory DriverLocationDto.fromJson(Map<String, dynamic> json) =>
      DriverLocationDto(
        driverId: (json['driverId'] ?? json['driverID'] ?? json['id']) as int,
        latitude: (json['latitude'] as num).toDouble(),
        longitude: (json['longitude'] as num).toDouble(),
        distanceKm: json['distanceKm'] ??0,
        etaSeconds: json['etaSeconds'] ??0,
        bearing: (json['bearing'] as num?)?.toDouble(),
      );

  /// Converts the DTO back into JSON (for WebSocket, REST, etc.).
  Map<String, dynamic> toJson() => {
        'driverId': driverId,
        'latitude': latitude,
        'longitude': longitude,
        'bearing': bearing,
        'distanceKm': distanceKm,
        'etaSeconds': etaSeconds,
      };

  /* ───────────────────────── utilities ───────────────────────────── */

  @override
  String toString() =>
      'DriverLocationDto(driverId: $driverId, lat: $latitude, lng: $longitude,bearing : $bearing,distanceKm : $distanceKm,etaSeconds : $etaSeconds)';

  /// Handy when you need to create a slightly modified copy.
  DriverLocationDto copyWith({
    int? driverId,
    double? latitude,
    double? longitude,
    double? bearing,
    double? distanceKm,
    int? etaSeconds,
  }) =>
      DriverLocationDto(
        driverId: driverId ?? this.driverId,
        latitude: latitude ?? this.latitude,
        longitude: longitude ?? this.longitude,
        bearing: bearing ?? this.bearing,
        distanceKm: distanceKm ?? this.distanceKm,
        etaSeconds: etaSeconds ?? this.etaSeconds,
      );

  /// Equality & hashCode so you can use the object in collections.
  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is DriverLocationDto &&
          runtimeType == other.runtimeType &&
          driverId == other.driverId &&
          latitude == other.latitude &&
          longitude == other.longitude &&
          etaSeconds == other.etaSeconds &&
          distanceKm == other.distanceKm &&
          bearing == other.bearing;

  @override
  int get hashCode => Object.hash(driverId, latitude, longitude, bearing, etaSeconds, distanceKm);
}