import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:wakelock_plus/wakelock_plus.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Cam issue',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  late CameraController controller;
  List<CameraDescription>? cameras;

  @override
  void initState() {
    loadCameras();
    super.initState();
  }

  loadCameras() async {
    try {
      cameras = await availableCameras();
      setState(() {});
    } on CameraException catch (e) {
      print('Error: ${e.code}\nError Message: ${e.description}');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Cam issue"),
      ),
      body: body(),
    );
  }

  body() {
    if (cameras?.isNotEmpty ?? false) {
      return Center(
        child: MyCameraPreview(cameras: cameras!),
      );
    }
    return const Center(
      child: Text("Loading"),
    );
  }
}

class MyCameraPreview extends StatefulWidget {
  final List<CameraDescription> cameras;

  const MyCameraPreview({
    Key? key,
    required this.cameras,
  }) : super(key: key);

  @override
  State<MyCameraPreview> createState() => _MyCameraPreviewState();
}

class _MyCameraPreviewState extends State<MyCameraPreview> {
  late CameraController controller;
  bool isDetecting = false;

  @override
  void initState() {
    initController();
    super.initState();
  }

  @override
  void dispose() {
    WakelockPlus.disable();
    super.dispose();
  }

  Future<void> initController() async {
    controller = CameraController(
      widget.cameras[0],
      ResolutionPreset.high,
      enableAudio: false,
    );
    await controller.initialize();
    final maxZoomValue = await controller.getMaxZoomLevel();
    await controller.lockCaptureOrientation();
    if (!mounted) {
      return;
    }

    await controller.startImageStream((CameraImage img) async {
      print("STREAM");
    });

    await WakelockPlus.enable();

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return CameraPreview(controller);
  }
}