/*

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

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    The detail view controller.

*/

import UIKit

class DetailViewController: UIViewController {

    // MARK: Properties

    @IBOutlet weak var detailDescriptionLabel: UILabel!

    // Property to hold the detail item's title.

    var sampleTitle: String?

    // Preview action items.

    lazy var previewActions: [UIPreviewActionItem] = {

        func previewActionForTitle(_ title: String, style: UIPreviewActionStyle = .default) -> UIPreviewAction {

            return UIPreviewAction(title: title, style: style) { previewAction, viewController in

                guard let detailViewController = viewController as? DetailViewController,

                          let sampleTitle = detailViewController.sampleTitle else { return }

                print("\(previewAction.title) triggered from `DetailViewController` for item: \(sampleTitle)")

            }

        }

        let action1 = previewActionForTitle("Default Action")

        let action2 = previewActionForTitle("Destructive Action", style: .destructive)

        let subAction1 = previewActionForTitle("Sub Action 1")

        let subAction2 = previewActionForTitle("Sub Action 2")

        let groupedActions = UIPreviewActionGroup(title: "Sub Actions…", style: .default, actions: [subAction1, subAction2] )

        return [action1, action2, groupedActions]

    }()

    // MARK: Life cycle

    override func viewDidLoad() {

        super.viewDidLoad()

        // Update the user interface for the detail item.

        if let sampleTitle = sampleTitle {

            detailDescriptionLabel.text = sampleTitle

        }

        // Set up the detail view's `navigationItem`.

        navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem

        navigationItem.leftItemsSupplementBackButton = true

    }

    // MARK: Preview actions

    override var previewActionItems : [UIPreviewActionItem] {

        return previewActions

    }

}