@override
  Future<List<Dive>> download(
    Computer computer,
    ComputerTransport transport, [
    String? lastFingerprint,
  ]) async {
    await _send((
      DiveComputerMethod.download,
      [computer, transport, lastFingerprint],
    ));
    return (_downloadedDives = Completer()).future;
  }

class Computer {
  Computer(
    this.vendor,
    this.product, {
    this.transports = const [],
  });

  final String vendor, product;
  final List<ComputerTransport> transports;
  BluetoothDevice? device;

  void addBleDevice(BluetoothDevice device) {
    this.device = device;
  }

  @override
  String toString() =>
      '$vendor $product ${device ?? ''} [${transports.map((t) => t.name).join(', ')}]';

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is Computer &&
          runtimeType == other.runtimeType &&
          vendor == other.vendor &&
          product == other.product;

  @override
  int get hashCode {
    // hash codes are not equal across isolates, so we need to generate a
    // consistent hash code for each computer
    return '$vendor $product'.codeUnits.fold(1, (a, b) => a * b);
  }
}