import UIKit
import CoreData

class ConfirmationRegistrationViewController: UIViewController {
//This ViewController is used twice
//- As the Confirmation at the end of the registration
//- As an Overview of the user's own data

    var appDelegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate

    var PersonToRegister = [
        "FirstName":"",
        "LastName":"",
        "Password":"",
        "Email":"",
        "Street":"",
        "AdditionalAdressInfo":"",
        "ZipCode":"",
        "City":"",
        "PaymentMethod":""
    ]


    var user: User?
    var UserEmail: String? = ""

    @IBOutlet weak var NameConfirmationRegistration: UILabel!
    @IBOutlet weak var MailConfirmationRegistration: UILabel!
    @IBOutlet weak var StreetConfirmationRegistration: UILabel!
    @IBOutlet weak var ZipcityConfirmationRegistration: UILabel!
    @IBOutlet weak var AdditionalInfoConfirmationRegistration: UILabel!
    @IBOutlet weak var PaymentConfirmationRegistration: UILabel!
    @IBOutlet weak var PasswordConfirmationRegistration: UILabel!

    @IBOutlet weak var DataView: UIView!

    @IBOutlet weak var SaveButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationItem.largeTitleDisplayMode = .never
        if let uem = UserDefaults.standard.string(forKey: "UserEmail"){
            UserEmail = uem
        }

        if !UserDefaults.standard.bool(forKey: "loggedIn"){
            //If no user is logged in: diplays the entered data to confirm
            DisplayDataToConfirm()
        }else{
            //If an user is logged in: display the fetch and display the data of the current user
            fetchUserData()
            DisplayCoreDataEntry()
            SaveButton.isHidden = true
        }
    }

    @IBAction func CloseRegistration(_ sender: Any) {
            self.saveUser()

            let alertController = UIAlertController(title: "Erfolgreich registriert", message: "Bitte melden Sie sich nun an um Ihre Eingaben zu bestätigen", preferredStyle: .alert)

            let action = UIAlertAction(title: "Ok!", style: .default) { (action:UIAlertAction) in
                self.dismiss(animated: true, completion: nil)
            }

            alertController.addAction(action)
            self.present(alertController, animated: true, completion: nil)
    }

    func DisplayDataToConfirm(){
        NameConfirmationRegistration.text = PersonToRegister["FirstName"]! + " " + PersonToRegister["LastName"]!
        MailConfirmationRegistration.text = PersonToRegister["Email"]
        StreetConfirmationRegistration.text = PersonToRegister["Street"]
        ZipcityConfirmationRegistration.text = PersonToRegister["ZipCode"]! + " " + PersonToRegister["City"]!
        AdditionalInfoConfirmationRegistration.text = PersonToRegister["AdditionalAdressInfo"]
        PaymentConfirmationRegistration.text = PersonToRegister["PaymentMethod"]
        PasswordConfirmationRegistration.text = PersonToRegister["Password"]
    }


    func DisplayCoreDataEntry(){
        NameConfirmationRegistration.text = (user?.firstname!)! + " " + (user?.lastname!)!
        MailConfirmationRegistration.text = user?.email
        StreetConfirmationRegistration.text = user?.street
        ZipcityConfirmationRegistration.text = (user?.zipcode!)! + " " + (user?.city!)!
        AdditionalInfoConfirmationRegistration.text = user?.additionaladressinfo
        PaymentConfirmationRegistration.text = user?.paymentmethod
        PasswordConfirmationRegistration.text = user?.password
    }

    func saveUser(){
        let userEntity: NSEntityDescription? = NSEntityDescription.entity(forEntityName: "User", in: self.appDelegate.coreDataStack.managedObjectContext)

        if userEntity != nil {
            let user1: User = User(entity: userEntity!, insertInto: self.appDelegate.coreDataStack.managedObjectContext)
            user1.firstname = PersonToRegister["FirstName"]
            user1.lastname = PersonToRegister["LastName"]
            user1.email = PersonToRegister["Email"]
            user1.street = PersonToRegister["Street"]
            user1.additionaladressinfo = PersonToRegister["AdditionalAdressInfo"]
            user1.zipcode = PersonToRegister["ZipCode"]
            user1.city = PersonToRegister["City"]
            user1.paymentmethod = PersonToRegister["PaymentMethod"]
            user1.password = PersonToRegister["Password"]

            self.appDelegate.coreDataStack.saveContext()
        }
    }

    func fetchUserData(){

        let fetchRequest: NSFetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "User")
        fetchRequest.predicate = NSPredicate(format: "email == %@", UserEmail!)
        fetchRequest.fetchLimit = 1
        do {
            if let results = try self.appDelegate.coreDataStack.managedObjectContext.fetch(fetchRequest) as? [NSManagedObject] {
                let fetchedUser: [User]? = results as? [User]
                if fetchedUser != nil {
                    self.user = fetchedUser![0]
                }
            }

        }
        catch {
            fatalError("There was an error fetching the items")
        }

    }
}