@IBOutlet weak var firstNameField: UITextField!
@IBOutlet weak var lastNameField: UITextField!
@IBOutlet weak var emailField: UITextField!
@IBOutlet weak var passwordField: UITextField!
@IBOutlet weak var reenterPasswordField: UITextField!
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var nextButton: UIButton!

let picker = UIImagePickerController()
var userStorage: FIRStorageReference!
var ref: FIRDatabaseReference!

override func viewDidLoad() {
    super.viewDidLoad()

    picker.delegate = self

    let storage = FIRStorage.storage().reference(forURL: "gs://boost-65792.appspot.com")

    ref = FIRDatabase.database().reference()
    userStorage = storage.child("users")}

@IBAction func AddPhotoPressed(_ sender: Any) {
    picker.allowsEditing = true
    picker.sourceType = .photoLibrary

    present(picker, animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
        self.imageView.image = image
        nextButton.isHidden = false
    }
    self.dismiss(animated: true, completion: nil)
}
@IBAction func nextButtonPressed(_ sender: Any) {
    guard firstNameField.text != "",lastNameField.text != "", emailField.text != "", passwordField.text != "", reenterPasswordField.text != "" else {
        return}

    if passwordField.text == reenterPasswordField.text {
    FIRAuth.auth()?.createUser(withEmail: emailField.text!, password: passwordField.text!, completion: { (user, error) in
        if let error = error {
            print(error.localizedDescription)
        }

        if let user = user {

            let changeRequest = FIRAuth.auth()!.currentUser!.profileChangeRequest()
            changeRequest.displayName = self.firstNameField.text!; changeRequest.displayName = self.lastNameField.text!
            changeRequest.commitChanges(completion: nil)

            let imageRef = self.userStorage.child("(user.uid).jpg")

            let data = UIImageJPEGRepresentation(self.imageView.image!, 0.5)

            let uploadTask = imageRef.put(data!, metadata: nil, completion: { (metadata, err) in
                if err != nil {
                    print(err?.localizedDescription)
                }
                imageRef.downloadURL(completion: { (url, er) in
                    if er != nil {
                        print(er!.localizedDescription)
                    }

                    if let url = url {
                        let userInfo: [String : Any] = ["uid" : user.uid,
                                                        "first name" : self.firstNameField.text!, "last name" : self.lastNameField.text!, "urlToImage" : url.absoluteString]

                        self.ref.child("users").child(user.uid).setValue(userInfo)

                        let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "usersVC")

                        self.present(vc, animated: true, completion: nil)

                    }

                })
            })

            uploadTask.resume()

        }

        })

    } else {
        print("Password does not match") }