//
//  ViewController.swift
//  ColorPaperLine
//
//  Created by MizushimaYusuke on 2017/04/23.
//  Copyright © 2017 MizushimaYusuke. All rights reserved.
//

import UIKit
import SpriteKit

class ViewController: UIViewController, SKSceneDelegate {

    weak var scene: SKScene?
    var lasttime: TimeInterval = 0
    var ready = false

    override func viewDidLoad() {
        super.viewDidLoad()
        setupScene()
        createBox()
        createCard()
    }

    func setupScene() {
        let sv = SKView(frame: view.bounds)
        let s = SKScene(size: sv.frame.size)
        s.delegate = self
        s.backgroundColor = .lightGray
        sv.presentScene(s)
        sv.showsPhysics = true
        view.addSubview(sv)
        scene = s
    }

    func createBox() {
        let box = SKShapeNode(rect: CGRect(origin: .zero, size: view.frame.size))
        box.lineWidth = 20
        box.strokeColor = UIColor(hue: 0.5, saturation: 0.2, brightness: 0.3, alpha: 1)
        scene?.addChild(box)

        box.physicsBody = SKPhysicsBody(edgeLoopFrom: CGRect(x: 10, y: 10, width: view.frame.maxX - 20, height: view.frame.maxY - 20))
        box.physicsBody?.isDynamic = false
        box.physicsBody?.restitution = 1.0
    }

    func createCard() {
        let card = SKSpriteNode(color: .white, size: CGSize(width: 60, height: 60))
        card.position = view.center
        card.run(SKAction.colorize(with: .red, colorBlendFactor: 1, duration: 1))
        scene?.addChild(card)

        card.physicsBody = SKPhysicsBody(rectangleOf: card.size)
        card.physicsBody?.affectedByGravity = false
        card.physicsBody?.restitution = 1
        card.physicsBody?.angularDamping = 0
        card.name = "card"
        card.zPosition = 100

    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        ready = true
        if let card = scene?.childNode(withName: "card") {
            card.physicsBody?.applyImpulse(CGVector(dx: 40, dy: 40))
            card.physicsBody?.applyTorque(.pi)
        }
    }

    func update(_ currentTime: TimeInterval, for scene: SKScene) {
        if !ready {
            return
        }

        if currentTime - lasttime > 0.1 {
            lasttime = currentTime
            if let card = scene.childNode(withName: "card") {

                let newCard = SKSpriteNode(color: .white, size: CGSize(width: 60, height: 60))
                newCard.position = card.position
                newCard.zRotation = card.zRotation
                let hue = CGFloat(arc4random_uniform(10)) * 0.1
                let color = UIColor(hue: hue, saturation: 0.5, brightness:1, alpha:1)
                newCard.color = color
                scene.addChild(newCard)

                card.run(SKAction.colorize(with: color, colorBlendFactor: 1, duration: 0.2))
                card.physicsBody?.applyTorque(0.1)
            }
        }
    }

}