/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    This navigation controller overrides prepareForSegue to run a code sample and show the results or an error.

*/

import UIKit

class NavigationController: UINavigationController {

    // MARK: - Navigation

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

        if segue.identifier == "ShowLoadingView", let selectedCodeSample = sender as? CodeSample {

            selectedCodeSample.run {

                (results,error) in

                if let navigationController = segue.destinationViewController as? UINavigationController, let loadingViewController = navigationController.topViewController as? LoadingViewController {

                    var segueIdenfier = "ShowResult"

                    if error != nil {

                        loadingViewController.error = error

                        segueIdenfier = "ShowError"

                    } else {

                        loadingViewController.results = results

                        loadingViewController.codeSample = selectedCodeSample

                    }

                    dispatch_async(dispatch_get_main_queue()) {

                        loadingViewController.performSegueWithIdentifier(segueIdenfier, sender: loadingViewController)

                    }

                }

            }

        }

    }

}