//
//  ViewController.swift
//  dot3D
//
//  Created by MizushimaYusuke on 2017/12/11.
//  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

        // 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()
    }

    var ready = 0
    var points:[SCNVector3] = []
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

        if let p = touches.first?.location(in: sceneView) {
            if let hit = sceneView.hitTest(p, options: [.sortResults : true]).first?.node {
                if hit.geometry is SCNSphere {
                    hit.geometry?.firstMaterial?.diffuse.contents = UIColor.yellow
                }
            }

            if ready == 0 {
                ready += 1
                if let hit = sceneView.hitTest(p, types: .featurePoint).first {
                    let position = SCNVector3(hit.worldTransform.columns.3.x, hit.worldTransform.columns.3.y + 0.05, hit.worldTransform.columns.3.z - 0.02)
                    stride(from: 0, to: 0.06, by: 0.02).forEach { x in
                        stride(from: 0, to: 0.06, by: 0.02).forEach { y in
                            stride(from: 0, to: 0.06, by: 0.02).forEach { z in
                                let dot = SCNSphere(radius: 0.005)
                                dot.firstMaterial?.diffuse.contents = UIColor.black
                                let dotNode = SCNNode(geometry: dot)
                                dotNode.position = SCNVector3(position.x + Float(x), position.y + Float(y), position.z + Float(z))
                                sceneView.scene.rootNode.addChildNode(dotNode)
                            }
                        }
                    }
                }
            }
        }
    }

}