/*

    Copyright (C) 2017 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    The application-specific delegate class.

*/

import UIKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {

        // Add a search view controller to the root `UITabBarController`.

        if let tabController = window?.rootViewController as? UITabBarController {

            tabController.viewControllers?.append(packagedSearchController())

        }

        return true

    }

    /*

        When the user clicks a Top Shelf item, the application will be asked

        to open the associated URL.

    */

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

        print("Application launched with URL: \(url)")

        return true

    }

    // MARK: Convenience

    /*

         A method demonstrating how to encapsulate a `UISearchController` for presentation in, for example, a `UITabBarController`

    */

    func packagedSearchController() -> UIViewController {

        // Load a `SearchResultsViewController` from its storyboard.

        let storyboard = UIStoryboard(name: "ViewControllerSamples", bundle: nil)

        guard let searchResultsController = storyboard.instantiateViewController(withIdentifier: SearchResultsViewController.storyboardIdentifier) as? SearchResultsViewController else {

            fatalError("Unable to instatiate a SearchResultsViewController from the storyboard.")

        }

        /*

            Create a UISearchController, passing the `searchResultsController` to

            use to display search results.

        */

        let searchController = UISearchController(searchResultsController: searchResultsController)

        searchController.searchResultsUpdater = searchResultsController

        searchController.searchBar.placeholder = NSLocalizedString("Enter keyword (e.g. iceland)", comment: "")

        // Contain the `UISearchController` in a `UISearchContainerViewController`.

        let searchContainer = UISearchContainerViewController(searchController: searchController)

        searchContainer.title = NSLocalizedString("Search", comment: "")

        // Finally contain the `UISearchContainerViewController` in a `UINavigationController`.

        let searchNavigationController = UINavigationController(rootViewController: searchContainer)

        return searchNavigationController

    }

}