//
//  ViewController.swift
//  KingyoBall
//
//  Created by MizushimaYusuke on 2017/08/21.
//  Copyright © 2017 MizushimaYusuke. All rights reserved.
//

import UIKit
import SpriteKit

class ViewController: UIViewController {

    weak var scene: SKScene?

    override func viewDidLoad() {
        super.viewDidLoad()
        setupScene()
        createBall()
    }

    func setupScene() {
        let sv = SKView(frame: view.bounds)
        let s = SKScene(size: sv.frame.size)
        s.backgroundColor = UIColor(hue: 0.4, saturation: 0.05, brightness: 1, alpha: 1)
        sv.presentScene(s)
        view.addSubview(sv)
        scene = s
    }

    func createBall() {
        let dw = view.frame.maxX / 7.0

        UIGraphicsBeginImageContextWithOptions(CGSize(width:40, height: 40), false, 0);
        UIColor(hue: 0, saturation: 0.8, brightness: 1, alpha: 1).set()
        if let ctx = UIGraphicsGetCurrentContext() {
            ctx.move(to: CGPoint(x: 0, y: 20))
            ctx.addLine(to: CGPoint(x: 25, y: 0))
            ctx.addLine(to: CGPoint(x: 25, y: 40))
            ctx.closePath()
            ctx.fillPath()

            ctx.move(to: CGPoint(x: 20, y: 10))
            ctx.addLine(to: CGPoint(x: 40, y: 30))
            ctx.addLine(to: CGPoint(x: 40, y: 10))
            ctx.addLine(to: CGPoint(x: 20, y: 30))
            ctx.closePath()

            ctx.fillPath()
        }
        let img = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()

        stride(from: dw, to: view.frame.maxX, by: dw).forEach { x in
            let ball = SKShapeNode(circleOfRadius: 40)
            ball.lineWidth = 2
            ball.strokeColor = UIColor.gray
            ball.position = CGPoint(x: x, y: view.frame.midY)
            scene?.addChild(ball)

            let bar = SKSpriteNode(color: .gray, size: CGSize(width: 1, height: view.frame.midY - 80))
            bar.position = CGPoint(x: x, y: 3 * view.frame.maxY / 4.0)
            scene?.addChild(bar)

            let crop = SKCropNode()
            let mask = SKShapeNode(circleOfRadius: 40)
            mask.fillColor = scene!.backgroundColor
            mask.lineWidth = 0
            crop.maskNode = mask
            ball.addChild(crop)

            let s = SKSpriteNode(color: UIColor(hue: 0.5, saturation: 0.5, brightness: 1, alpha: 1), size: CGSize(width: 80, height: 60))
            s.position = CGPoint(x: 0, y: -10)
            crop.addChild(s)

            let kingyo = SKSpriteNode(texture: SKTexture(image: img))
            kingyo.name = "kingyo"
            kingyo.position = ball.position
            scene?.addChild(kingyo)
        }
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        scene?.enumerateChildNodes(withName: "kingyo", using: { (n, _) in
            let wait = TimeInterval(arc4random_uniform(10)) * 0.1
            n.run(.sequence([.wait(forDuration: wait), .move(by: CGVector(dx: 0, dy: -10), duration: 1), .move(by: CGVector(dx: 0, dy: 10), duration: 1)]))
        })
    }

}