//
//  ViewController.swift
//  flipThrough
//
//  Created by MizushimaYusuke on 2017/12/14.
//  Copyright © 2017 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)
                self.createPage(position, 50)
            }
        }
    }

    func createPage(_ position: SCNVector3, _ cnt: Int) {

        if cnt < 0 {
            return
        }

        let page = SCNBox(width: 0.02, height: 0.001, length: 0.02, chamferRadius: 0.0)
        page.firstMaterial?.diffuse.contents = UIColor(hue: 0.13, saturation: 0.1, brightness: 0.8, alpha: 1)
        let pageNode = SCNNode(geometry: page)
        pageNode.pivot = SCNMatrix4MakeTranslation(0.01, 0, 0)
        pageNode.position = position
        sceneView.scene.rootNode.addChildNode(pageNode)

        pageNode.runAction(.rotateBy(x: 0, y: 0, z: -.pi, duration: 0.3))
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
            self.createPage(position, cnt - 1)
        }

    }
}