import 'package:camera/camera.dart';

class CameraService {
  CameraController? controller;
  late List<CameraDescription> _cameras;
  bool _isFront = true;

  bool get isFront => _isFront;

  /// Init default
  Future<void> init() async {
    _cameras = await availableCameras();

    final front = _cameras.firstWhere(
      (c) => c.lensDirection == CameraLensDirection.front,
      orElse: () => _cameras.first,
    );

    controller = CameraController(
      front,
      ResolutionPreset.high,
      enableAudio: false,
    );

    await controller!.initialize();
    _isFront = true;
  }

  /// Switch front <-> back
  Future<void> switchCamera() async {
    if (_cameras.length < 2) return;

    final newCam = _cameras.firstWhere(
      (c) =>
          c.lensDirection ==
          (_isFront ? CameraLensDirection.back : CameraLensDirection.front),
    );

    await controller?.dispose();

    controller = CameraController(
      newCam,
      ResolutionPreset.high,
      enableAudio: false,
    );

    await controller!.initialize();
    _isFront = !_isFront;
  }

  Future<XFile> takePicture() async {
    if (controller == null || !controller!.value.isInitialized) {
      throw Exception('Camera not ready');
    }
    return controller!.takePicture();
  }

  void dispose() {
    controller?.dispose();
  }
}