public final class LoginCoordinator: AbstractCoordinator {

    // MARK: Delegate Properties
    private unowned let delegate: LoginCoordinatorDelegate

    // MARK: Initializers
    public init(delegate: LoginCoordinatorDelegate, navigationController: UINavigationController) {
        self.delegate = delegate
        self.navigationController = navigationController
        super.init()
    }

    // MARK: Stored Properties
    private let navigationController: UINavigationController
    private let loginService: LoginService = LoginService()

    // MARK: Instance Methods
    public override func start() {
        super.start()
        let vc: LoginVC = LoginVC(delegate: self)
        self.navigationController.pushViewController(
            vc,
            animated: true
        )
    }
}

// MARK: - LoginVCDelegate Protocol
extension LoginCoordinator: LoginVCDelegate {
    public func login(with email: String, password: String) {
        self.loginService.getUser(with: email, password: password)
            .onSuccess { [weak self] (user: User) in
                 DispatchQueue.main.async {
                     self?.navigationController.popViewController(
                         animated: true
                     )
                 }
                 self?.delegate.storeUser(user, coordinator: self))
            }
            .onFailure { [weak self] (error: NetworkingError) in
                 print(error)
                 self?.presentErrorAlert()
            }
    }
}