//
//  ViewControllerSimulador.swift
//  SimuladorResorte
//
//  Created by Angel Figueroa Rivera on 10/10/19.
//  Copyright © 2019 Itesm. All rights reserved.
//

import UIKit

class ViewControllerSimulador: UIViewController {
    @IBOutlet weak var btnPause: UIButton!
    @IBOutlet weak var btnPlay: UIButton!
    @IBOutlet weak var btnStop: UIButton!
    @IBOutlet weak var btnReset: UIButton!
    @IBOutlet weak var btnValues: UIButton!
    @IBOutlet weak var lbTime: UILabel!
    @IBOutlet weak var imgMass: UIImageView!

    var btnSelected : UIButton!
    var mass : Int = 500
    var constantK : Int = 16
    var timer : Timer!
    var counter : Int = 0
    var timeSpeed : Float = 0.01
    var elapsedTime : Float = 0.0

    var xi : Float = 80.0 // Punto inicial
    var o : Float = 0.0 // Pi si esta compactado, 0 si esta estirado
    var startingXCoord : CGFloat!


    override func viewDidLoad() {
        super.viewDidLoad()
        btnSelected = btnPause
        btnValues.layer.cornerRadius = 4
        btnPause.layer.cornerRadius = 4
        btnPlay.layer.cornerRadius = 4
        btnStop.layer.cornerRadius = 4
        btnReset.layer.cornerRadius = 4

        startingXCoord = imgMass.frame.origin.x
        xi = Float(imgMass.frame.size.width)
    }

    @IBAction func onPause(_ sender: UIButton) {
        if timer != nil {
            onBtnTap(sender)
            timer.invalidate()
            timer = nil
        }
    }

    @IBAction func onPlay(_ sender: UIButton) {
        onBtnTap(sender)
        if timer == nil {
            timer = Timer.scheduledTimer(timeInterval: TimeInterval(timeSpeed), target: self, selector: #selector(onTimerFires), userInfo: nil, repeats: true)
        }
    }

    @objc func onTimerFires() {
        let min = Int(counter / 6000)
        let sec = Int(counter / 100 % 60)
        let mil = counter % 100
        var minStr = "\(min)"
        var secStr = "\(sec)"
        var milStr = "\(mil)"

        if min < 10 {
            minStr = "0\(min)"
        }

        if sec < 10 {
            secStr = "0\(sec)"
        }

        if mil < 10 {
            milStr = "0\(mil)"
        }

        lbTime.text = "\(minStr):\(secStr):\(milStr)"
        counter += 1
        updatePosicion()
    }

    @IBAction func onStop(_ sender: UIButton) {
        if timer != nil {
            onBtnTap(sender)
            timer.invalidate()
            timer = nil
            counter = 0
        }
    }

    @IBAction func onReset(_ sender: UIButton) {
        onBtnTap(sender)
        counter = 0
        if timer != nil {
            timer.invalidate()
            timer = nil
        }

        lbTime.text = "00:00:00"
        mass = 500
        constantK = 16
        resetPos()
        print(mass)
        print(constantK)
    }

    func onBtnTap(_ sender: UIButton) {
        resetBtn(btnSelected)

        sender.backgroundColor = UIColor.init(red: 1, green: 59/255, blue: 66/255, alpha: 1)
        sender.tintColor = UIColor.init(red: 1, green: 1, blue: 1, alpha: 1)
        btnSelected = sender
        }

    func resetBtn(_ sender : UIButton) {
        sender.backgroundColor = UIColor.init(red: 233/255, green: 233/255, blue: 233/255, alpha: 1)
        sender.tintColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 1)
    }

    func updatePosicion() {
        elapsedTime += 1 / timeSpeed
        let posActual = getPosActual(xi: xi, k: Float(constantK), m: Float(mass)/1000, o: o, t: elapsedTime)
        let movement = Float(startingXCoord) + posActual
        let newRect = CGRect(origin: CGPoint(x: CGFloat(movement), y: CGFloat(imgMass.frame.origin.y)), size: imgMass.frame.size)

        imgMass.frame = newRect
    }

    func resetPos() {
        elapsedTime = 0.0

        let movement = Float(startingXCoord)
        let newRect = CGRect(origin: CGPoint(x: CGFloat(movement), y: CGFloat(imgMass.frame.origin.y)), size: imgMass.frame.size)

        imgMass.frame = newRect
    }

    func getPosActual( xi: Float, k: Float, m: Float, o: Float, t: Float) -> Float{
        return abs(xi) * cos(sqrt(k/m) * t + o)
    }

    @IBAction func switchChange(_ sender: UISwitch) {
        if sender.isOn {
            timeSpeed = 0.1
        } else {
            timeSpeed = 0.01
        }
    }
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let viewValues = segue.destination as! ViewControllerValues
        viewValues.mass = mass
        viewValues.constantK = constantK
    }

    //UNWIND
    @IBAction func unwindSetValues(unwindSegue: UIStoryboardSegue) {

    }

}