import UIKit
import Base
import ReSwift

class LoginViewController: UIViewController {

    @IBOutlet var usernameField: UITextField!
    @IBOutlet var passwordField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        store.subscribe(self) {state in
            state.usersState
        }
    }

    @IBAction func onLoginButton(_ sender: Any) {
        store.dispatch(AuthenticatePassword(username: usernameField.text!, password: passwordField.text!))
    }

    @IBAction func onTwitterButton(_ sender: Any) {
        store.dispatch(AuthenticateTwitter())
    }

    @IBAction func onFacebookButton(_ sender: Any) {
        store.dispatch(AuthenticateFacebook(from: self))
    }
}

// MARK: - State management
extension LoginViewController: StoreSubscriber {
    func newState(state: UsersState) {
        if let error = state.authState.error {
            presentError(error: error.type, viewController: self, completion: nil)
        }
        if let _ = state.getCurrentUser {
            self.dismiss(animated: true, completion: nil)
        }
    }
}