import AVFoundation
import SwiftUI
import UIKit

class CameraUIView: UIView {
    var previewLayer: AVCaptureVideoPreviewLayer?

    override func layoutSubviews() {
        super.layoutSubviews()
        previewLayer?.frame = bounds
    }
}

struct CameraView: UIViewRepresentable {
    func makeUIView(context _: Context) -> CameraUIView {
        let view = CameraUIView()

        let captureSession = AVCaptureSession()
        guard let captureDevice = AVCaptureDevice.default(for: .video) else { return view }
        guard let input = try? AVCaptureDeviceInput(device: captureDevice) else { return view }
        captureSession.addInput(input)

        let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        previewLayer.videoGravity = .resizeAspectFill
        view.layer.addSublayer(previewLayer)
        view.previewLayer = previewLayer

        DispatchQueue.global(qos: .background).async {
            captureSession.startRunning()
        }

        return view
    }

    func updateUIView(_ uiView: CameraUIView, context _: Context) {
        uiView.previewLayer?.frame = uiView.bounds
    }
}