import UIKit
import SceneKit
import SpriteKit
import AVFoundation

class ViewController: UIViewController {
	@IBOutlet weak var scnView: SCNView!

	var videoLayer: AVPlayerLayer!
	var videoPlayer: AVPlayer!

	override func viewDidLoad() {
		super.viewDidLoad()

		setupVideo()

		// Do any additional setup after loading the view, typically from a nib.
		scnView.showsStatistics = true
		scnView.allowsCameraControl = true

		let scnScene = SCNScene()
		scnView.scene = scnScene

		// setup SceneKit scene
		let cameraNode = SCNNode()
		cameraNode.camera = SCNCamera()
		cameraNode.position = SCNVector3(x: 0.0, y: 0.0, z: 25.0)
		scnScene.rootNode.addChildNode(cameraNode)

		let cubeNode = SCNNode()
		cubeNode.geometry = SCNBox(width: 5.0, height: 5.0, length: 5.0, chamferRadius: 0.0)
		scnScene.rootNode.addChildNode(cubeNode)

		let material = cubeNode.geometry!.firstMaterial!
		let tryAVLayer = false // change me!
		if tryAVLayer {
		  material.diffuse.contents = videoLayer // This crashes
		} else {
		  // setup SpriteKit Scene
		  let skScene = SKScene()
		  skScene.backgroundColor = UIColor.black
		  skScene.size = CGSize(width: 100, height: 100)

		  let skVideoNode = SKVideoNode(avPlayer: videoPlayer)
		  skVideoNode.size = CGSize(width: 100, height: 100)
		  skVideoNode.position = CGPoint(x: 50, y: 50)

		  skScene.addChild(skVideoNode)
		  material.diffuse.contents = skScene  // This works
		}
	}

	func setupVideo() {
		let item = AVPlayerItem(url: URL(fileURLWithPath: Bundle.main.path(forResource: "test", ofType: "mp4")!))
		let player = AVPlayer(playerItem: item)
		let layer = AVPlayerLayer(player: player)
		videoLayer = layer
		videoPlayer = player
		player.play()
	}
}