import AVFoundation

#if os(iOS)
import UIKit
/// The namespace of DeviceUtil.
public enum DeviceUtil {
    /// Looks up the AVCaptureVideoOrientation by a Notification.
    @MainActor
    public static func videoOrientation(by notification: Notification) -> AVCaptureVideoOrientation? {
        guard let device = notification.object as? UIDevice else {
            return nil
        }
        return videoOrientation(by: device.orientation)
    }

    /// Looks up the  AVCaptureVideoOrientation by an UIDeviceOrientation.
    public static func videoOrientation(by orientation: UIDeviceOrientation) -> AVCaptureVideoOrientation? {
        switch orientation {
        case .portrait:
            return .portrait
        case .portraitUpsideDown:
            return .portraitUpsideDown
        case .landscapeLeft:
            return .landscapeRight
        case .landscapeRight:
            return .landscapeLeft
        default:
            return nil
        }
    }

    /// Looks up the AVCaptureVideoOrientation by an UIInterfaceOrientation.
    public static func videoOrientation(by orientation: UIInterfaceOrientation) -> AVCaptureVideoOrientation? {
        switch orientation {
        case .portrait:
            return .portrait
        case .portraitUpsideDown:
            return .portraitUpsideDown
        case .landscapeLeft:
            return .landscapeLeft
        case .landscapeRight:
            return .landscapeRight
        default:
            return nil
        }
    }

    /// Device is connected a headphone or not.
    public static func isHeadphoneConnected(_ ports: Set<AVAudioSession.Port> = [.headphones, .bluetoothLE, .bluetoothHFP, .bluetoothA2DP]) -> Bool {
        let outputs = AVAudioSession.sharedInstance().currentRoute.outputs
        for description in outputs where ports.contains(description.portType) {
            return true
        }
        return false
    }

    /// Device is disconnected a headphone or not.
    public static func isHeadphoneDisconnected(_ notification: Notification, ports: Set<AVAudioSession.Port> = [.headphones, .bluetoothLE, .bluetoothHFP, .bluetoothA2DP]) -> Bool {
        guard let previousRoute = notification.userInfo?[AVAudioSessionRouteChangePreviousRouteKey] as? AVAudioSessionRouteDescription else {
            return false
        }
        var isHeadohoneConnected = false
        for output in previousRoute.outputs where ports.contains(output.portType) {
            isHeadohoneConnected = true
            break
        }
        if !isHeadohoneConnected {
            return false
        }
        return !DeviceUtil.isHeadphoneConnected(ports)
    }
}
#endif