/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A `UIViewController` subclass that stores references to game-wide input sources and managers.

*/

import UIKit

import SpriteKit

class GameViewController: UIViewController, SceneManagerDelegate {

    // MARK: Properties

    /// A placeholder logo view that is displayed before the home scene is loaded.

    @IBOutlet weak var logoView: UIImageView!

    /// A manager for coordinating scene resources and presentation.

    var sceneManager: SceneManager!

    // MARK: View Life Cycle

    override func viewDidLoad() {

        super.viewDidLoad()

        /*

            Set up the `touchControlInputNode` to cover the entire view, and

            size the controls to a reasonable value.

        */

        let viewSize = view.bounds.size

        let controlLength = min(GameplayConfiguration.TouchControl.minimumControlSize, viewSize.width * GameplayConfiguration.TouchControl.idealRelativeControlSize)

        let controlSize = CGSize(width: controlLength, height: controlLength)

        let touchControlInputNode = TouchControlInputNode(frame: view.bounds, thumbStickNodeSize: controlSize)

        let gameInput = GameInput(nativeControlInputSource: touchControlInputNode)

        // Load the initial home scene.

        let skView = view as! SKView

        sceneManager = SceneManager(presentingView: skView, gameInput: gameInput)

        sceneManager.delegate = self

        sceneManager.transitionToScene(identifier: .home)

    }

    // Hide status bar during game play.

    override var prefersStatusBarHidden: Bool {

        return true

    }

    // MARK: SceneManagerDelegate

    func sceneManager(_ sceneManager: SceneManager, didTransitionTo scene: SKScene) {

        // Fade out the app's initial loading `logoView` if it is visible.

        UIView.animate(withDuration: 0.2, delay: 0.0, options: [], animations: {

            self.logoView.alpha = 0.0

        }, completion: { _ in

            self.logoView.isHidden = true

        })

    }

}