//
//  ViewController.swift
//  Star
//
//  Created by MizushimaYusuke on 2018/03/15.
//  Copyright © 2018 MizushimaYusuke. All rights reserved.
//

import UIKit
import SceneKit
import ARKit

class ViewController: UIViewController, ARSCNViewDelegate {

    @IBOutlet var sceneView: ARSCNView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Set the view's delegate
        sceneView.delegate = self

        // Show statistics such as fps and timing information
        sceneView.showsStatistics = true
        sceneView.autoenablesDefaultLighting = true

        // Create a new scene
        let scene = SCNScene()

        // Set the scene to the view
        sceneView.scene = scene
    }

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

        // Create a session configuration
        let configuration = ARWorldTrackingConfiguration()

        // Run the view's session
        sceneView.session.run(configuration)
    }

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

        // Pause the view's session
        sceneView.session.pause()
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let p = touches.first?.location(in: sceneView) {
            if let hit = sceneView.hitTest(p, types: .featurePoint).first {

                let position = SCNVector3(hit.worldTransform.columns.3.x, hit.worldTransform.columns.3.y, hit.worldTransform.columns.3.z)

                let node = SCNNode()
                node.position = position
                sceneView.scene.rootNode.addChildNode(node)

                let star = SCNText(string: "★", extrusionDepth: 10)
                star.font = UIFont.systemFont(ofSize: 100)
                star.firstMaterial?.diffuse.contents = UIColor.yellow

                let starNode = SCNNode(geometry: star)
                starNode.scale = SCNVector3(0.0003, 0.0003, 0.0003)
                node.addChildNode(starNode)

                node.runAction(SCNAction.rotateBy(x: 0, y: .pi * 2.0, z: 0, duration: 3.0))
            }
        }
    }

}