import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:telnow_mobile_new/src/utils/ui_service.dart';

class OpenCamera extends StatefulWidget {
  final List<CameraDescription>? cameras;
  const OpenCamera({required this.cameras, super.key});

  @override
  State<OpenCamera> createState() => _OpenCameraState();
}

class _OpenCameraState extends State<OpenCamera> {
  late CameraController _cameraController;
  bool _isRearCameraSelected = true;

  @override
  void dispose() {
    _cameraController.dispose();
    super.dispose();
  }

  @override
  void initState() {
    super.initState();
    initCamera(widget.cameras![0]);
  }

  Future takePicture() async {
    if (!_cameraController.value.isInitialized) {
      return null;
    }
    if (_cameraController.value.isTakingPicture) {
      return null;
    }
    try {
      await _cameraController.setFlashMode(FlashMode.off);
      XFile pickedFile = await _cameraController.takePicture();
      UIService.navigatorKey.currentState?.pop(pickedFile);
      // Navigator.of(context).pop(pickedFile);
    } on CameraException catch (e) {
      debugPrint('Error occurred while taking picture: $e');
      return null;
    }
  }

  Future initCamera(CameraDescription cameraDescription) async {
    _cameraController =
        CameraController(cameraDescription, ResolutionPreset.high);
    try {
      await _cameraController.initialize().then((_) {
        if (!mounted) return;
        setState(() {});
      });
    } on CameraException catch (e) {
      debugPrint("camera error $e");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: SafeArea(
          child: SizedBox(
            width: double.infinity, height: double.infinity,
            child: Stack(children: [
              (_cameraController.value.isInitialized) ? CameraPreview(_cameraController) : Container(color: Colors.black, child: const Center(child: CircularProgressIndicator())),
              Align(
                  alignment: Alignment.bottomCenter,
                  child: Container(
                    width: double.infinity,
                    height: MediaQuery.of(context).size.height * 0.15,
                    decoration: const BoxDecoration(color: Colors.black),
                    child: Row(crossAxisAlignment: CrossAxisAlignment.center, children: [
                      Expanded(
                          child: IconButton(
                            padding: EdgeInsets.zero,
                            iconSize: 30,
                            icon: Icon(_isRearCameraSelected ? Icons.cameraswitch_outlined : Icons.cameraswitch_rounded, color: Colors.white),
                            onPressed: () {
                              setState(() => _isRearCameraSelected = !_isRearCameraSelected);
                              initCamera(widget.cameras![_isRearCameraSelected ? 0 : 1]);
                            },
                          )
                      ),
                      Expanded(
                          child: IconButton(
                            onPressed: takePicture,
                            iconSize: 60,
                            padding: EdgeInsets.zero,
                            constraints: const BoxConstraints(),
                            icon: const Icon(Icons.circle, color: Colors.white),
                          )
                      ),
                      const Spacer(),
                    ]),
                  )),
            ]),
          ),
        )
    );
  }
}