import 'dart:io';

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

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  final cameras = await availableCameras();
  final firstCamera = cameras.first;

  runApp(
    MaterialApp(
      theme: ThemeData.dark(),
      home: MyApp(
        camera: firstCamera,
      ),
    ),
  );
}

class MyApp extends StatefulWidget {
  const MyApp({
    super.key,
    required this.camera,
  });

  final CameraDescription camera;

  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  late CameraController _controller;
  late Future<void> _initializeControllerFuture;

  @override
  void initState() {
    super.initState();
    _controller = CameraController(
      widget.camera,
      ResolutionPreset.medium,
    );
    _initializeControllerFuture = _controller.initialize();
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('카메라 화면')),
      body: Column(
        children: [
          FutureBuilder<void>(
            future: _initializeControllerFuture,
            builder: (context, snapshot) {
              if (snapshot.connectionState == ConnectionState.done) {
                return CameraPreview(_controller);
              } else {
                return const Center(child: CircularProgressIndicator());
              }
            },
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          try {
            await _initializeControllerFuture;
            final image = await _controller.takePicture();

            if (!context.mounted) return;

            await Navigator.of(context).push(
              MaterialPageRoute(
                builder: (context) => DisplayPictureScreen(
                  imagePath: image.path,
                ),
              ),
            );
          } catch (e) {
            print(e);
          }
        },
        child: const Icon(Icons.camera_alt),
      ),
    );
  }
}

class DisplayPictureScreen extends StatelessWidget {
  final String imagePath;

  const DisplayPictureScreen({super.key, required this.imagePath});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Captured Image')),
      body: Image.file(File(imagePath)),
    );
  }
}