LONDON-IOS/GMERemittance/Login/LoginViewController.swift

//
//  LoginViewController.swift
//  GMERemittance
//
//  Created by Sujal on 12/12/17.
//  Copyright © 2017 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation
import UIKit

class LoginViewController: UIViewController {
    
    @IBOutlet weak var viewContent: UIView!
    
    private var isScrolled: Bool = false
    
    private var activeTextField: UITextField?
    
    private var redirectMessage: String = "nil"
    var noConnectionTimeOutDialog: Bool?
    
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    private var loginviewmodel = LoginViewModel()
    
    @IBOutlet weak var textFieldUsername: UITextField!
    @IBOutlet weak var textFieldPassword: UITextField!
    
    @IBAction func forgetPasswordAction(_ sender: Any) {
        self.performSegue(withIdentifier: "forgetPasswordIdentifier", sender: nil)
        clearKeyboard()
        activeTextField?.resignFirstResponder()
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    
    @IBAction func logIn(_ sender: Any) {
        
        activeTextField?.resignFirstResponder()
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
        
        disableUserInteractions()
        showActivityIndicator(activityIndicator: activityIndicator)
        
        switch loginviewmodel.checkParams(username: textFieldUsername.text!, password: textFieldPassword.text!) {
        case .Valid:
            loginviewmodel.setCredentials(userId: textFieldUsername.text!, password: textFieldPassword.text!)
            loginviewmodel.logIn()
        case .InValid(let error):
            dismissActivityIndicator(activityIndicator: activityIndicator)
            self.popUpMessageError(value: 11, message: error)
            enableUserInteractions()
        }
    }
    
    
    @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()
        
        textFieldUsername.delegate = self
        textFieldPassword.delegate = self
        
        noConnectionTimeOutDialog = false
        
        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
        
        
        textFieldUsername.text = UserDefaults.standard.object(forKey: "com.gmeremit.username") as? String
        
        
        loginviewmodel.loggedInConnectionTimeOut.value = nil
        /**
         connection timeout
         */
        loginviewmodel.loggedInConnectionTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            
            if !self.noConnectionTimeOutDialog! {
                self.enableUserInteractions()
                self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
                self.popUpMessage(value: 20)
            }
            self.noConnectionTimeOutDialog = true
            
            print("12345")

        }
        
        loginviewmodel.internetConnection.value = nil
        /**
         internet check
         */
        loginviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 15)
            
        }
        /**
         Update user login Info
         */
        
        loginviewmodel.loggedin.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.enableUserInteractions()
            guard $0! else {
                if self.loginviewmodel.redirectToCodeFillUp() {
                    if let userId = UserDefaults.standard.object(forKey: "com.gmeremit.username") as? String{
                        self.redirectMessage = "\(userId) is already registered, please click Resend code and enter four digit code that is sent to \(userId) OR call our customer center number: +82 1588-6864"
                    }else{
                        self.redirectMessage = "userId is already registered, please click Resend code and enter four digit code that is sent to userId OR call our customer center number: +82 1588-6864"
                    }
                    
                    self.performSegue(withIdentifier: "redirectToOTP", sender: nil)
                } else {
                    self.popUpMessageError(value: 10, message: self.loginviewmodel.getErrorMessage())
                }
                return
            }
            guard self.isVerified() else {
                guard self.isKYCSubmitted() else {
                    self.performSegue(withIdentifier: "fillKYCPersonalInfo", sender: nil)
                    return
                }
                self.redirectToHomeViewController()
                return
            }
            self.redirectToHomeViewController()
        }
    }
    
    func redirectToHomeViewController(){
        self.performSegue(withIdentifier: "homeFromLogin", sender: nil)
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        
        if segue.identifier == "redirectToOTP" {
            let fillcodeViewController = segue.destination as! FillSignUpCodeController
            fillcodeViewController.deviceORpassword = 1
            fillcodeViewController.redirectToOTP = self.redirectMessage
        }
    }
}


extension LoginViewController: UITextFieldDelegate {
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
        activeTextField = textField
        checkScroll()
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if textField == textFieldUsername {
            textFieldPassword.becomeFirstResponder()
        } else if textField == textFieldPassword {
            textFieldPassword.resignFirstResponder()
        }
        return true
    }
}

extension LoginViewController: ScrollableProtocol {
    /**
     - Returns offset value to animate
     */
    var offset: CGFloat {
        get {
            return viewContent.frame.origin.y - 40
        }
    }
    
    /**
     - 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)
            })
        }
    }
}