//
//  ViewController.swift
//  FlipSignBoard
//
//  Created by MizushimaYusuke on 2018/01/08.
//  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 + 0.02, hit.worldTransform.columns.3.z)

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

                stride(from: 0, to: 100, by: 5).forEach { x in
                    UIGraphicsBeginImageContextWithOptions(CGSize(width: 5, height: 50), true, 0)
                    let paragraphStyle = NSMutableParagraphStyle()
                    paragraphStyle.alignment = .center
                    let attrs = [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 30, weight: UIFont.Weight.black),
                                 NSAttributedStringKey.paragraphStyle: paragraphStyle,
                                 NSAttributedStringKey.foregroundColor: UIColor.white]
                    "Hello".draw(with: CGRect(x: -CGFloat(x) + 10, y: 10, width: 0, height: 0), options: .usesLineFragmentOrigin, attributes: attrs, context: nil)

                    let img = UIGraphicsGetImageFromCurrentImageContext()!
                    UIGraphicsEndImageContext()

                    let part = SCNBox(width: 0.004, height: 0.04, length: 0.0001, chamferRadius: 0)
                    part.firstMaterial?.diffuse.contents = img
                    let partNode = SCNNode(geometry: part)
                    partNode.position = SCNVector3(CGFloat(x) * 0.0010, 0, 0)
                    signBoard.addChildNode(partNode)

                    partNode.runAction(.rotateBy(x: 0, y: .pi * 5.0, z: 0, duration: 3.0))
                }
            }
        }
    }
}