LONDON-IOS/GMERemittance/Module/SplashScreen/User Interface/View/SplashScreenViewController.swift

//
//  SplashScreenViewController.swift
//  GMERemittance
//
//  Created by gme_2 on 10/09/2018.
//Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class SplashScreenViewController: UIViewController {
    
    // MARK: IBOutlets
    @IBOutlet weak var imageViewDotCenter: UIImageView!
    @IBOutlet weak var imageViewDotLeft: UIImageView!
    @IBOutlet weak var imageViewDotRight: UIImageView!
    
    @IBOutlet weak var imageViewHomeLogo: UIImageView!
    @IBOutlet weak var labelHomeDescription: UILabel!
    
    @IBOutlet weak var constraintLeft: NSLayoutConstraint!
    @IBOutlet weak var constraintRight: NSLayoutConstraint!
    
    @IBOutlet weak var buttonLogin: UIButton!
    @IBOutlet weak var buttonSignUp: UIButton!
    
    // MARK: Properties
    
    
    var counter: Int = 0
    
    let imageDotSelected = UIImage(named: "dotSelected")
    let imageDotUnselected = UIImage(named: "dotUnselected")
    
    let imageFirst = UIImage(named: "ic_splashFirstScreen")
    let imageSecond = UIImage(named: "ic_splashSecondScreen")
    let imageThird = UIImage(named: "ic_splashThirdScreen")
    
    let descriptionFirst = "Hassle free money transfer to your loved ones"
    let descriptionSecond = "Connect to local community"
    let descriptionThird = "Earn reward points and get surprise gifts"
    
    
    
    var presenter: SplashScreenModuleInterface?
    

    // MARK: VC's Life cycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setup()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title = ""
        self.hideNavBar()
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title = ""
    }
    
    // MARK: IBActions
    
    @IBAction func login(_ sender: UIButton) {
        self.presenter?.login()
    }
    
    
    @IBAction func register(_ sender: UIButton) {
        self.presenter?.register()
    }
    
    // MARK: Other Functions
    
    private func hideNavBar() {
        self.navigationController?.isNavigationBarHidden = true
    }
    
    private func setup() {
        // all setup should be done here
        hideNavBar()
        setUpButtons()
        imageViewDotLeft.image = UIImage(named: "dotSelected")
        let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(_SplashScreenViewController.handleSwipes(_:)))
        let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(_SplashScreenViewController.handleSwipes(_:)))
        
        leftSwipe.direction = .left
        rightSwipe.direction = .right
        
        view.addGestureRecognizer(leftSwipe)
        view.addGestureRecognizer(rightSwipe)
        
        Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(_SplashScreenViewController.updateImage), userInfo: nil, repeats: true)
    }
    
    @objc func handleSwipes(_ sender: UISwipeGestureRecognizer) {
        if (sender.direction == .right) {
            counter = counter - 1
            if counter < 0 {
                counter = 2
            }
        }
        
        if (sender.direction == .left) {
            counter = counter + 1
            if counter > 2 {
                counter = 0
            }
        }
        setImageandLabels()
    }
    
    @objc func updateImage() {
        counter += 1
        if counter > 2 {
            counter = 0
        }
        setImageandLabels()
    }
    
    func setImageandLabels() {
        
        imageViewDotLeft.image = imageDotUnselected
        imageViewDotCenter.image = imageDotUnselected
        imageViewDotRight.image = imageDotUnselected
        
        switch counter {
        case 0:

            imageViewDotLeft.image = imageDotSelected
            imageViewHomeLogo.image = imageFirst
            labelHomeDescription.text = descriptionFirst
        case 1:

            imageViewDotCenter.image = imageDotSelected
            imageViewHomeLogo.image = imageSecond
            labelHomeDescription.text = descriptionSecond
        case 2:

            imageViewDotRight.image = imageDotSelected
            imageViewHomeLogo.image = imageThird
            labelHomeDescription.text = descriptionThird
        default:
            return
        }
    }
    
    func setUpButtons() {
        buttonSignUp.layer.cornerRadius = 25
        buttonLogin.backgroundColor = .clear
        buttonLogin.layer.cornerRadius = 25
        buttonLogin.layer.borderWidth = 1
        buttonLogin.layer.borderColor = UIColor.white.cgColor
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

// MARK: SplashScreenViewInterface
extension SplashScreenViewController: SplashScreenViewInterface {
    
}