LONDON-IOS/GME Remit/Modules/Profile/ChangePersonalInformation/User Interface/View/ChangePersonalInformationViewController.swift

//
//  ProfileChangePhoneNumberViewController.swift
//  GME Remit
//
//  Created by Jeongbae Kong on 21/01/2020.
//Copyright © 2020 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class ChangePersonalInformationViewController: UIViewController {
  
  // MARK: Properties
  
  var presenter: ChangePersonalInformationModuleInterface?
  var type: TargetInfo = .mobile
  private var target: String?
  
  private var password: String? {
    didSet {
      guard
        let password = password
        else { return }
      let model = ChangePersonalInformationModel(
        passwordForChangePersonalInformation: password,
        newValue: changeInformationTextField.text
      )
      target = type.rawValue
      presenter?.verifyPasswordForChangePersonalInformation(model: model, target: target ?? "")
    }
  }
  
  // MARK: Computed Properties
  
  // MARK: IBOutlets
  
  @IBOutlet weak var changeDescriptionLabel: UILabel!
  @IBOutlet weak var whatToChangeLabel: UILabel!
  @IBOutlet weak var changeInformationTextField: ValidationTextField!
  @IBOutlet weak var saveButton: UIButton!
  
  // MARK: VC's Life cycle
  
  override func viewDidLoad() {
    super.viewDidLoad()
    setup()
  }
  
  // MARK: IBActions
  
  @IBAction func saveNewPersonalInformationButton(_ sender: UIButton) {
    
    if let isUseBiometric = KeyChain.shared.get(key: .biometricAuth), isUseBiometric == "1" {
      let biometricAuthenticationWireframe = BiometricAuthenticationWireframe()
      biometricAuthenticationWireframe.openWithDelegate(on: self, delegate: self)
    } else {
      showSecureKeyPad()
    }
  }
  
  private func showSecureKeyPad() {
    self.openPasswordInput { (value) in
        self.password = value
    }
  }
}

// MARK: ChangePersonalInformationViewInterface
extension ChangePersonalInformationViewController: ChangePersonalInformationViewInterface {
  func successChangeProfileInformation() {
    presenter?.goBackToPersonalInformation()
  }
  
  func successProfileValidationOTP() {
    self.alertWithOk(
      type: .success,
      message: "verification_completed_title_text".localized(),
      title: "will_change_your_personal_information_title_text".localized(),
      okTitle: "ok_text".localized()
    ) {
      if let newValue = self.changeInformationTextField.text {
        self.presenter?.changeProfileInformation(newValue: newValue, target: self.target ?? "")
      } else {
        self.alert(type: .error, message: "Cannot verify OTP.")
      }
    }
  }
  
  func readyForOpenOTP() {
    
    self.alertWithOk(
      type: .success,
      message: "will_proceed_to_check_otp_title_text".localized(),
      title: "successfully_verified_password_title_text".localized(),
      okTitle: "ok_text".localized()
    ) {
      if let newValue = self.changeInformationTextField.text {
        self.presenter?.openOTP(newValue: newValue)
      } else {
        self.alert(type: .error, message: "Cannot verify password")
      }
    }
  }
  
  func setError(with error: Error) {
    alert(message: error.localizedDescription)
  }
}

// MARK: Other Functions
extension ChangePersonalInformationViewController {
  private func setup() {
    setupTargets()
    setupLabel()
    validationCheck()
    
    saveButton.layer.cornerRadius = 5
  }
  
  private func setupTargets() {
    saveButton.isEnabled = false
    saveButton.backgroundColor = .lightGray
    
    changeInformationTextField.addTarget(
      self,
      action: #selector(newPersonalInformationType(sender:)),
      for: UIControl.Event.editingChanged
    )
  }
  
  private func setupLabel() {
    switch type {
      
    case .mobile:
      navigationItem.title = "change_your_phonenumber_title_text".localized()
      changeDescriptionLabel.text = "change_your_phonenumber_instruction_text".localized()
      whatToChangeLabel.text = "new_phonenumber_text".localized()
      changeInformationTextField.placeholder = "enter_your_new_phonenumber_text".localized()
      
    case .email:
      
      changeInformationTextField.keyboardType = .emailAddress
      navigationItem.title = "change_your_email_title_text".localized()
      changeDescriptionLabel.text = "change_your_email_instruction_text".localized()
      whatToChangeLabel.text = "new_email_text".localized()
      changeInformationTextField.placeholder = "enter_your_new_email_text".localized()
    }
  }
  
  @objc private func newPersonalInformationType(sender: UITextField) {
    
    switch type {
      
    case .mobile:
      if changeInformationTextField.isValid {
        saveButton.isEnabled = true
        saveButton.backgroundColor = .themeRed
      } else {
        saveButton.isEnabled = false
        saveButton.backgroundColor = .lightGray
      }
    case .email:
      if changeInformationTextField.isValid {
        saveButton.isEnabled = true
        saveButton.backgroundColor = .themeRed
      } else {
        saveButton.isEnabled = false
        saveButton.backgroundColor = .lightGray
      }
    }
  }
  
  private func validationCheck() {
    switch type {
    case .mobile:
      changeInformationTextField.validCondition = { !$0.isEmpty && $0.count > 9 && $0.count < 12 }
    case .email:
      changeInformationTextField.validCondition = { $0.isEmail() }
    }
  }
}

// MARK: - BiometricAuthenticationViewControllerDelegate
extension ChangePersonalInformationViewController: BiometricAuthenticationViewControllerDelegate {
  func viewController(
    _ viewController: BiometricAuthenticationViewController,
    didFailWithError error: BiometricAuthenticationError, errorMessage: String?) {
    
    print("BiometricAuthenticationWireframe Error: \(errorMessage ?? "")")
    viewController.dismiss(animated: true) {
      
      switch error {
      case .userFallback:
        self.showSecureKeyPad()
      case .authenticationFailed, .userCancel, .biometryNotAvailable,
           .biometryNotEnrolled, .biometryLockout, .notBeConfigured:
        self.alert(type: .error, message: error.message)
      }
    }
  }
  
  func doSelectLocalAuthenticationPolicy(
    _ viewController: BiometricAuthenticationViewController
  ) -> BiometricAuthenticationPolicy {
    return .deviceOwnerAuthenticationWithBiometrics
  }
  
  func didComplete(_ viewController: BiometricAuthenticationViewController) {
    viewController.dismiss(animated: true) {
      guard let encryptedPW = KeyChain.shared.get(key: .password) else {
        MainWireframe.logoutWarningAlert(message: "To use biometrics authentication you have to login again.")
        return
      }
      self.password = encryptedPW
    }
  }
  
  func viewController(
    _ viewController: BiometricAuthenticationViewController,
    informationTitleLabel titleLabel: UILabel,
    authenticationButton button: UIButton
  ) {
    titleLabel.text = "use_biometric_authentication_text".localized()
    button.setTitle("verify_account_button_text".localized(), for: .normal)
  }
}