yattee/Model/Player/PiPDelegate.swift

import AVKit
import Foundation
import SwiftUI

final class PiPDelegate: NSObject, AVPictureInPictureControllerDelegate {
    var player: PlayerModel!

    func pictureInPictureController(
        _: AVPictureInPictureController,
        failedToStartPictureInPictureWithError error: Error
    ) {
        print(error.localizedDescription)
    }

    func pictureInPictureControllerWillStartPictureInPicture(_: AVPictureInPictureController) {}

    func pictureInPictureControllerDidStartPictureInPicture(_: AVPictureInPictureController) {
        player?.playingInPictureInPicture = true
        player?.avPlayerBackend.startPictureInPictureOnPlay = false
    }

    func pictureInPictureControllerDidStopPictureInPicture(_: AVPictureInPictureController) {
        guard let player = player else {
            return
        }

        player.playingInPictureInPicture = false
    }

    func pictureInPictureControllerWillStopPictureInPicture(_: AVPictureInPictureController) {}

    func pictureInPictureController(
        _: AVPictureInPictureController,
        restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: @escaping (Bool) -> Void
    ) {
        var delay = 0.0
        #if os(iOS)
            if !player.presentingPlayer {
                delay = 0.5
            }
            if player.currentItem.isNil {
                delay = 1
            }
        #endif

        if !player.currentItem.isNil, !player.musicMode {
            player?.show()
        }

        DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
            withAnimation(.linear(duration: 0.3)) {
                self?.player.playingInPictureInPicture = false
            }

            completionHandler(true)
        }
    }
}