//
//  LoginViewController.swift
//  digipass
//
//  Created by Сергей Сивагин on 9/13/18.
//  Copyright © 2018 CardPay. All rights reserved.
//

import UIKit

class LoginViewController: BaseViewController {

    // MARK: - Private properties

    private var progress: ProgressHUD?
    private var isActivated: Bool = false

    var isBackImageViewEnabled: Bool = false

    // MARK: - IBOutlet properties

    @IBOutlet weak var loginTextField: ExtendedTextField!
    @IBOutlet weak var passwordTextField: ExtendedTextField!
    @IBOutlet weak var loginView: UIView!
    @IBOutlet weak var phoneLabel: LinkedLabel!
    @IBOutlet weak var mailLabel: LinkedLabel!
    @IBOutlet weak var showFAQImageView: UIImageView!
    @IBOutlet weak var nextButton: BlueButton!
    @IBOutlet weak var scrollView: UIScrollView!
    @IBOutlet weak var contentView: UIView!
    @IBOutlet weak var backStackView: UIStackView!
    @IBOutlet weak var backImageView: UIImageView!
    @IBOutlet weak var screenTitleLabel: UILabel!

    // MARK: - Override methods

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        addNavigationBarLogotype()
        isNeedExpireTimeout = false
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        ActivationOverseerUtils.shared.delegate = self
        progress = ProgressHUD(with: view)
        progress?.simplyShow()
        progress?.suspendOperation()
        configureCommonView()
        configureLoginTextField()
        configurePasswordTextField()
        configurePhoneLabel()
        configureEmailLabel()
        configureShowFAQImageView()
        configureNextButton()
        setupRecognizer()
        if #available(iOS 11.0, *) {
            scrollView.contentInsetAdjustmentBehavior = .never
        } else {
            automaticallyAdjustsScrollViewInsets = false
        }
        scrollView.contentInset = UIEdgeInsets.zero
    }

    override func onKeyboardBegin(_ notification: Notification) {
        guard let info: NSDictionary = notification.userInfo as NSDictionary? else {
            return
        }
        let keyboardSize = info.object(forKey: UIKeyboardFrameBeginUserInfoKey) as? CGRect
        let offset = UIEdgeInsetsMake(0, 0, (keyboardSize?.height)!, 0)
        scrollView.contentInset = offset
    }

    override func onKeyboardEnd() {
        scrollView.contentInset = UIEdgeInsets.zero
    }

    // MARK: - Private methods

    private func configureCommonView() {
        if isBackImageViewEnabled {
            screenTitleLabel.isHidden = true
            backStackView.isHidden = false

            let onBackTap = UITapGestureRecognizer(target: self, action: #selector(onBackTapped(_:)))
            backImageView.isUserInteractionEnabled = true
            backImageView.addGestureRecognizer(onBackTap)
        }
    }

    private func configureLoginTextField() {
        loginTextField.label = "\(getString(with: "Login")):"
        loginTextField.textField.returnKeyType = .next
        loginTextField.delegate = self
        loginTextField.length = Constants.LoginViewController.loginMaxLength
    }

    private func configurePasswordTextField() {
        passwordTextField.label = "\(getString(with: "Password")):"
        passwordTextField.textField.returnKeyType = .done
        passwordTextField.delegate = self
        passwordTextField.isPassword = true
        passwordTextField.addEndView(getShowPasswordView())
        passwordTextField.length = Constants.LoginViewController.passwordMaxLength
    }

    private func getShowPasswordView() -> UIView {
        let onViewLongTap = UILongPressGestureRecognizer().apply {
            $0.addTarget(self, action: #selector(showPassword(_:)))
        }
        return UIImageView(frame: CGRect(x: 0, y: 0, width: 32, height: 32)).apply({
            $0.isUserInteractionEnabled = true
            $0.addGestureRecognizer(onViewLongTap)
            $0.image = #imageLiteral(resourceName: "password_field_eye")
            $0.contentMode = .center
        })
    }

    private func configurePhoneLabel() {
        phoneLabel.setLinkType(.phoneNumber)
    }

    private func configureEmailLabel() {
        mailLabel.setLinkType(.email, with: self)
    }

    private func configureShowFAQImageView() {
        let onTapGesture = UITapGestureRecognizer(target: self, action: #selector(showFAQ(_:)))
        showFAQImageView.isUserInteractionEnabled = true
        showFAQImageView.addGestureRecognizer(onTapGesture)
    }

    private func configureNextButton() {
        nextButton.setTitle(getString(with: "Next"), for: .normal)
    }

    private func setupRecognizer() {
        let onTapGesture = UITapGestureRecognizer(target: self, action: #selector(onHideKeyboardTap))
        loginView.addGestureRecognizer(onTapGesture)
        view.addGestureRecognizer(onTapGesture)
    }

    private func showSetPINCodeScreen(for check: Bool = false) {
        isActivated = check
        performSegue(withIdentifier: "SetPINCodeSegue", sender: self)
        progress?.suspendOperation()
    }

    private func showSetCompanyNameScreen() {
        let controller = storyboard?.instantiateViewController(withIdentifier: "SetCompanyNameViewController")
        let navigationController = BaseNavigationController(rootViewController: controller!)
        present(navigationController, animated: true, completion: nil)
        progress?.suspendOperation()
    }

    private func saveUser() {
        let username = loginTextField.textField.text
        guard let userId = username else {
            return
        }
        DataManager.shared.addUser(userId)
    }

    private func isPINEmpty() -> Bool {
        let defaults = UserDefaults.standard
        return defaults.string(forKey: Constants.UserDefaults.userPINKey)?.isEmpty ?? true
    }

    private func showBlockedActivationDialog() {
        showDialog(title: "Activation Blocked!", message: "Too many activation attempts. Please, try again in 3 hours.")
    }

    private func isUserActivatedOnDevice(_ userId: String) -> Bool {
        guard let result = DataManager.shared.getUsers() else {
            return false
        }
        var isFounded = false
        Array(result).forEach { user in
            if user.userId == userId {
                isFounded = true
                return
            }
        }
        return isFounded
    }

    // MARK: - OBJC methods

    @objc func onHideKeyboardTap() {
        view.endEditing(true)
    }

    @objc func showPassword(_ recognizer: UILongPressGestureRecognizer) {
        if recognizer.state == .began {
            passwordTextField.isPassword = false
        }

        if recognizer.state == .ended {
            passwordTextField.isPassword = true
        }
    }

    @objc func showFAQ(_ recognizer: UITapGestureRecognizer ) {
        onHideKeyboardTap()
    }

    @objc func onBackTapped(_ recognizer: UITapGestureRecognizer) {
        navigationController?.popViewController(animated: true)
    }

    @IBAction func onNextTap() {
        onHideKeyboardTap()

        if ActivationOverseerUtils.shared.isActivationBlocked() {
            showBlockedActivationDialog()
            return
        }

        if !isConnectedToNetwork() {
            showDialog(title: getString(with: "No Internet Connection"),
                       message: getString(with: "Please, turn on Wi-Fi or Cellular Data"))
            return
        }

        guard let userId = loginTextField.textField.text else {
            return
        }

        guard let password = passwordTextField.textField.text else {
            return
        }

        if isUserActivatedOnDevice(userId) {
            loginTextField.error = getString(with: "This user is activated")
            return
        }

        progress?.launchOperation {
            OrchestrationManager.shared.login(username: userId, password: password, delegate: self)
        }
    }
}

// MARK: - ExtendedTextFieldDelegate

extension LoginViewController: ExtendedTextFieldDelegate {

    func extendedTextFieldShouldReturn(_ sender: ExtendedTextField) {
        switch sender {
        case loginTextField:
            passwordTextField.textField.becomeFirstResponder()
        case passwordTextField:
            passwordTextField.textField.resignFirstResponder()
        default:
            break
        }
    }
}

// MARK: - ActivationDelegate

extension LoginViewController: ActivationDelegate {

    func activationDidCompleted(_ sender: ActivationUtils) {
        saveUser()
        if isPINEmpty() {
            showSetPINCodeScreen()
        } else {
            showSetCompanyNameScreen()
        }
    }

    func activationDidAborted(_ sender: ActivationUtils) {
        progress?.suspendOperation()
    }

    func activation(_ sender: ActivationUtils, notCompletedWith error: String) {
        switch error {
        case LoginError.emptyPassword.rawValue:
            passwordTextField.error = getString(with: "Password should not be empty")
        case LoginError.invalidPassword.rawValue:
            ActivationOverseerUtils.shared.addActivationAttempt()
            passwordTextField.error = getString(with: "Invalid password")
        case LoginError.emptyLogin.rawValue:
            loginTextField.error = getString(with: "Login should not be empty")
        case LoginError.worngPasswordLength.rawValue:
            passwordTextField.error = getString(with: "Password has a wrong length")
        default:
            loginTextField.error = getString(with: "Unknown error")
        }
        progress?.suspendOperation()
    }
}

// MARK: - ActivationOverseerUtils

extension LoginViewController: ActivationOverseerUtilsDelegate {

    func onActivationBlock(_ sender: ActivationOverseerUtils) {
        showBlockedActivationDialog()
    }
}