import 'package:camera/camera.dart';
import 'package:permission_handler/permission_handler.dart';

class CameraService {
  CameraController? _controller;
  List<CameraDescription>? _cameras;
  bool _isInitialized = false;

  bool get isInitialized => _isInitialized;
  CameraController? get controller => _controller;

  Future<bool> requestPermissions() async {
    final cameraStatus = await Permission.camera.request();
    return cameraStatus.isGranted;
  }

  Future<bool> initializeCamera() async {
    try {
      // Request camera permissions
      final hasPermission = await requestPermissions();
      if (!hasPermission) {
        return false;
      }

      // Get available cameras
      _cameras = await availableCameras();
      if (_cameras == null || _cameras!.isEmpty) {
        return false;
      }

      // Initialize the back camera (first camera is usually the back one)
      _controller = CameraController(
        _cameras!.first,
        ResolutionPreset.high,
        enableAudio: false,
      );

      await _controller!.initialize();
      _isInitialized = true;
      return true;
    } catch (e) {
      print('Error initializing camera: $e');
      return false;
    }
  }

  Future<String?> captureImage() async {
    if (_controller == null || !_isInitialized) {
      print('Camera not initialized');
      return null;
    }

    try {
      final image = await _controller!.takePicture();
      return image.path;
    } catch (e) {
      print('Error capturing image: $e');
      return null;
    }
  }

  Future<void> dispose() async {
    await _controller?.dispose();
    _controller = null;
    _isInitialized = false;
  }

  Future<void> switchCamera() async {
    if (_cameras == null || _cameras!.length < 2) {
      return;
    }

    try {
      final currentCameraIndex = _cameras!.indexOf(_controller!.description);
      final nextCameraIndex = (currentCameraIndex + 1) % _cameras!.length;

      await _controller?.dispose();

      _controller = CameraController(
        _cameras![nextCameraIndex],
        ResolutionPreset.high,
        enableAudio: false,
      );

      await _controller!.initialize();
    } catch (e) {
      print('Error switching camera: $e');
    }
  }
}