LONDON-IOS/GMERemittance/SignUp/SignUpViewController.swift

//
//  SignUpViewController.swift
//  GMERemittance
//
//  Created by Kushal on 11/30/17.
//  Copyright © 2017 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class SignUpViewController: UIViewController {

    var isScrolled: Bool = false
    
    private var activeTextField: UITextField?
    
    private var signupviewmodel = SignUpViewModel()
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    
    @IBOutlet weak var textFieldUsername: UITextField!
    @IBOutlet weak var textFieldPassword: UITextField!
    @IBOutlet weak var textFieldPasswordConfirm: UITextField!
   
    @IBOutlet weak var viewContent: UIView!
    
    @IBAction func initialSignUp(_ sender: Any) {
        
        activeTextField?.resignFirstResponder()
        
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
        
        signupviewmodel.signUpConnectionTimeOut.value = nil
        /**
         connection timeout
         */
        signupviewmodel.signUpConnectionTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 20)
        }
        
        disableUserInteractions()
        showActivityIndicator(activityIndicator: activityIndicator)
        
        signupviewmodel.setUserCredentials(username: textFieldUsername.text!, password: textFieldPassword.text!, confirmpassword: textFieldPasswordConfirm.text!)
        
        switch signupviewmodel.validateUser() {
            case .Valid:
                signupviewmodel.register()
            case .InValid(let error):
                enableUserInteractions()
                dismissActivityIndicator(activityIndicator: activityIndicator)
                self.popUpMessageError(value: 11, message: error)
        }
    }
    
    
    @objc func appMovedToForeground() {
        
        activeTextField?.resignFirstResponder()
        if isScrolled {
            isScrolled = !isScrolled
        }
    }
        
    override func viewDidLoad() {
        super.viewDidLoad()
        
        setUpNavBar(id: 100, title: "")
        
        NotificationCenter.default.addObserver(self, selector: #selector(appMovedToForeground), name: Notification.Name.UIApplicationWillEnterForeground, object: nil)
        
        registerTapListener()
        
        self.view.clipsToBounds = true
        
        textFieldUsername.autocorrectionType = .no
        textFieldPassword.autocorrectionType = .no
        textFieldPasswordConfirm.autocorrectionType = .no
      
        textFieldUsername.delegate = self
        textFieldPassword.delegate = self
        textFieldPasswordConfirm.delegate = self
        

        textFieldUsername.layer.borderColor = UIColor(red:0.91, green:0.93, blue:0.95, alpha:1.0).cgColor
        textFieldUsername.layer.borderWidth = 1.0
        textFieldUsername.layer.cornerRadius = 5
        
        textFieldPassword.layer.borderColor = UIColor(red:0.91, green:0.93, blue:0.95, alpha:1.0).cgColor
        textFieldPassword.layer.borderWidth = 1.0
        textFieldPassword.layer.cornerRadius = 5
        textFieldPasswordConfirm.layer.borderColor = UIColor(red:0.91, green:0.93, blue:0.95, alpha:1.0).cgColor
        textFieldPasswordConfirm.layer.borderWidth = 1.0
        textFieldPasswordConfirm.layer.cornerRadius = 5
        
        /**
            Internet Check
         */
        signupviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 15)
           
        }
        
        /**
            Update user registration info
         */
        signupviewmodel.registered.bind { [unowned self] in

            guard $0 != nil else {
                return
            }
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.enableUserInteractions()
            guard $0! else {
                self.popUpMessageError(value: 10, message: self.signupviewmodel.getErrorMessage())
                return
            }
            self.performSegue(withIdentifier: "fillOTP", sender: nil)
        }
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        
        if segue.identifier == "fillOTP" {
            let fillcodeViewController = segue.destination as! FillSignUpCodeController
            fillcodeViewController.deviceORpassword = 1
        }
        
    }
    

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
}

// UITextFieldDelegate and Scroll Protocol goes here

extension SignUpViewController: UITextFieldDelegate {
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
        activeTextField = textField
        checkScroll()
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    /**
      Curser move to next textfield when return button click in keyboad
     */
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if textField == textFieldUsername {
            textFieldPassword.becomeFirstResponder()
        } else if textField == textFieldPassword {
            textFieldPasswordConfirm.becomeFirstResponder()
        } else {
            textFieldPasswordConfirm.resignFirstResponder()
        }
        return true
    }
    
}

extension SignUpViewController: ScrollableProtocol {
    
    /**
     - Returns offset value to animate
     */
    var offset: CGFloat {
        get {
            return viewContent.frame.origin.y - 5
        }
    }
    
    /**
     - Returns Bool value to scroll
     */
    var viewScrolled: Bool {
        get {
            return isScrolled
        }
    }
    
    /**
     Check if textfield is active and required scroll
     */
    func checkScroll() {
        
        if !viewScrolled {
            performScroll(direction: 0)
            isScrolled = !isScrolled
        } else {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    /**
     Dissmiss keyboard when tap outside to textfield
     */
    func registerTapListener() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(clearKeyboard))
        view.addGestureRecognizer(tap)
    }
    
    /**
     Dissmiss keyboard
     */
    @objc func clearKeyboard() {
        activeTextField?.resignFirstResponder()
        
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    /**
     Animate scroll UI in case when textfield is active and also if inactive.
     */
    func performScroll(direction: Int) {
        if direction == 0 {
            UIView.animate(withDuration: 0.3, animations: {
                self.view.frame = self.view.frame.offsetBy(dx: 0, dy: self.offset * -1)
            })
        } else if direction == 1 {
            UIView.animate(withDuration: 0.3, animations: {
                self.view.frame = self.view.frame.offsetBy(dx: 0, dy: self.offset)
            })
        }
    }
    
}