/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The application delegate which creates the window and root view controller.

 */

import UIKit

import WatchConnectivity

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, WCSessionDelegate {

    func applicationDidFinishLaunching(_ application: UIApplication) {

        if WCSession.isSupported() {

            WCSession.default().delegate = self

            WCSession.default().activate()

        }

    }

    func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([Any]?) -> Swift.Void) -> Bool {

        print("Handoff dictionary: \(userActivity.userInfo)")

        return true

    }

    func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Swift.Void) {

        /*

             Because this method is likely to be called when the app is in the

             background, begin a background task. Starting a background task ensures

             that your app is not suspended before it has a chance to send its reply.

         */

        let application = UIApplication.shared

        var identifier = UIBackgroundTaskInvalid;

        // The "endBlock" ensures that the background task is ended and the identifier is reset.

        let endBlock = {

            if identifier != UIBackgroundTaskInvalid {

                application.endBackgroundTask(identifier)

            }

            identifier = UIBackgroundTaskInvalid

        };

        identifier = application.beginBackgroundTask(expirationHandler: endBlock)

        // Re-assign the "reply" block to include a call to "endBlock" after "reply" is called.

        let replyHandler = {(replyInfo: [String : Any]) in

            replyHandler(replyInfo)

            endBlock();

        }

        // Receives text input result from the WatchKit app extension.

        print("Message: \(message)")

        // Sends a confirmation message to the WatchKit app extension that the text input result was received.

        replyHandler(["Confirmation" : "Text was received."])

    }

    func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {

    }

    func sessionDidBecomeInactive(_ session: WCSession) {

    }

    func sessionDidDeactivate(_ session: WCSession) {

    }

}