//
//  ViewController.swift
//  Shoji
//
//  Created by MizushimaYusuke on 2018/01/12.
//  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 + 0.03, hit.worldTransform.columns.3.z)

                let paper = SCNBox(width: 0.03, height: 0.06, length: 0.001, chamferRadius: 0)
                let paperNode = SCNNode(geometry: paper)
                paperNode.position = position
                sceneView.scene.rootNode.addChildNode(paperNode)

                stride(from: -0.015, through: 0.015, by: 0.005).forEach { x in
                    let barv = SCNBox(width: 0.001, height: 0.06, length: 0.0015, chamferRadius: 0)
                    barv.firstMaterial?.diffuse.contents = UIColor.brown
                    let barvNode = SCNNode(geometry: barv)
                    barvNode.position = SCNVector3(x, 0, 0)
                    paperNode.addChildNode(barvNode)
                }

                stride(from: -0.03, through: 0.03, by: 0.005).forEach { y in
                    let barh = SCNBox(width: 0.03, height: 0.001, length: 0.0015, chamferRadius: 0)
                    barh.firstMaterial?.diffuse.contents = UIColor.brown
                    let barhNode = SCNNode(geometry: barh)
                    barhNode.position = SCNVector3(0, y, 0)
                    paperNode.addChildNode(barhNode)
                }
            }
        }
    }

}