LONDON-IOS/GMERemittance/Profile/ProfileChangePasswordViewController.swift

//
//  ProfileChangePasswordViewController.swift
//  GMERemittance
//
//  Created by Fm-user on 1/9/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class ProfileChangePasswordViewController: UIViewController {
    
   private var isScrolled: Bool = false
    
    @IBOutlet weak var textFieldCurrentPassword: UITextField!
    @IBOutlet weak var textFieldNewPassword: UITextField!
    @IBOutlet weak var textFieldConfirmPassword: UITextField!
    
    @IBOutlet weak var topLabel: UILabel!
    
    @IBOutlet weak var contentView: UIView!
    
    private var changepasswordviewmodel = ChangePasswordViewModel()
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    
    @objc func appMovedToForeground() {
        
        resignAllResponders()
        
        if isScrolled {
            isScrolled = !isScrolled
        }
        
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()

        NotificationCenter.default.addObserver(self, selector: #selector(appMovedToForeground), name: Notification.Name.UIApplicationWillEnterForeground, object: nil)
        registerTapListener()
        
        setUpNavBar(id: 201,title: "Profile")
        
        setUpAnotherLoginListener(genericviewmodel: changepasswordviewmodel)
        
        textFieldCurrentPassword.delegate = self
        textFieldNewPassword.delegate = self
        textFieldConfirmPassword.delegate = self
        
        
        changepasswordviewmodel.passwordConnectionTimeOut.value = nil
        /**
         connection timeout
         */
        changepasswordviewmodel.passwordConnectionTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 20)
        }
        
        
        changepasswordviewmodel.internetConnection.value = nil
        
        /**
            Internet check
         */
        
        changepasswordviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 15)
        }
     
        /**
            Update request for change password
         */
        changepasswordviewmodel.passwordChanged.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.changepasswordviewmodel.getErrorMessage())
                return
            }
            
            let alert = UIAlertController(title: "Password changed", message: "Successfully changed", preferredStyle: UIAlertControllerStyle.alert)
            alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: {Void in self.navigationController?.popViewController(animated: true)}))
            
            self.present(alert, animated: true, completion: nil)
        }
    }

    
    @IBAction func savePasswordChanges(_ sender: Any) {
        resignAllResponders()
        switch changepasswordviewmodel.validateFields() {
        case .Valid:
            showActivityIndicator(activityIndicator: activityIndicator)
            disableUserInteractions()
            changepasswordviewmodel.requestPasswordChanges()
            return
        case .InValid(let error):
            self.popUpMessageError(value: 11, message: error)
            
        }
        
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        
    }

    func resignAllResponders() {
        textFieldCurrentPassword.resignFirstResponder()
        textFieldNewPassword.resignFirstResponder()
        textFieldConfirmPassword.resignFirstResponder()
    }

    func popOutCurrentViewController() {
        dismiss(animated: true, completion: nil)
        navigationController?.popViewController(animated: true)
    }

}



extension ProfileChangePasswordViewController: UITextFieldDelegate {
    
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        switch textField {
        case textFieldCurrentPassword:
            textFieldNewPassword.becomeFirstResponder()
            return true
        case textFieldNewPassword:
            textFieldConfirmPassword.becomeFirstResponder()
            return true
        case textFieldConfirmPassword:
            textFieldConfirmPassword.resignFirstResponder()
            return true
        default:
            return false
        }
    }
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        
        let inputCharacters = (textField.text! as NSString).replacingCharacters(in: range, with: string)
        
        switch  textField {
        case textFieldCurrentPassword:
            changepasswordviewmodel.updateOldPassword(inputString: inputCharacters)
            return true
        case textFieldNewPassword:
            changepasswordviewmodel.updateNewPassword(inputString: inputCharacters)
            return true
        case textFieldConfirmPassword:
            changepasswordviewmodel.updateConfirmPassword(inputString: inputCharacters)
            return true
        default:
            return false
        }
    }
}


extension ProfileChangePasswordViewController: ScrollableProtocol {
    var offset: CGFloat {
        get {
            return topLabel.frame.origin.y + topLabel.frame.height
        }
    }
    
    var viewScrolled: Bool {
        get {
            return isScrolled
        }
    }
    
    func checkScroll() {
        
        if !viewScrolled {
            performScroll(direction: 0)
            isScrolled = !isScrolled
        } else {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    func registerTapListener() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(clearKeyboard))
        view.addGestureRecognizer(tap)
    }
    
    @objc func clearKeyboard() {
        resignAllResponders()
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    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)
            })
        }
    }
    
}