//: A UIKit based Playground for presenting user interface

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {
    private let roundedView = UIView(frame: CGRect(x: 10, y: 10, width: 50, height: 50))

    override func viewDidLoad() {
        super.viewDidLoad()

        roundedView.layer.cornerRadius = 25
        roundedView.backgroundColor = .red
        view.addSubview(roundedView)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        animate()
    }

//    private func animate() {
//        var animator = UIViewPropertyAnimator(duration: 2, curve: .easeInOut) {
//            self.changeRoundedView(x: 100, y: 200, width: 200, cornerRadius: 0)
//        }
//
//        animator.addCompletion { _ in
//            animator = UIViewPropertyAnimator(duration: 2, curve: .easeInOut) {
//                self.changeRoundedView(x: 10, y: 10, width: 50, cornerRadius: 25)
//            }
//
//            animator.startAnimation()
//        }
//
//        animator.startAnimation()
//    }

    private func animate() {
        UIView.animate(withDuration: 2, delay: 0, options: .autoreverse, animations: {
            self.changeRoundedView(x: 100, y: 200, width: 200, cornerRadius: 0)
        }, completion: { _ in
            self.changeRoundedView(x: 10, y: 10, width: 50, cornerRadius: 25)
        })
    }

    private func changeRoundedView(x: CGFloat, y: CGFloat, width: CGFloat, cornerRadius: CGFloat) {
        self.roundedView.frame.origin.x = x
        self.roundedView.frame.origin.y = y
        self.roundedView.frame.size.width = width
        self.roundedView.layer.cornerRadius = cornerRadius
    }
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()