// setup registration
let registration = DeviceRegistration(serverURL: URL(string: "<#AeroGear UnifiedPush Server URL#>")!)

// attempt to register
registration.register(
        clientInfo: { (clientDevice: ClientDeviceInformation!) in
            // setup configuration
            clientDevice.deviceToken = deviceToken
            clientDevice.variantID = "<# Variant Id #>"
            clientDevice.variantSecret = "<# Variant Secret #>"

            // apply the token, to identify THIS device
            let currentDevice = UIDevice()

            // -- optional config --
            // set some 'useful' hardware information params
            clientDevice.operatingSystem = currentDevice.systemName
            clientDevice.osVersion = currentDevice.systemVersion
            clientDevice.deviceType = currentDevice.model
        },
        success: {
            print("UnifiedPush Server registration succeeded")
        },
        failure: { (error: Error!) in
            print("failed to register, error: \(error.localizedDescription)")
        }
)

// setup registration
let registration = DeviceRegistration(config: "pushconfig")

// attempt to register
registration.register(
        clientInfo: { (clientDevice: ClientDeviceInformation!) in
            // setup configuration
            clientDevice.deviceToken = deviceToken

            // apply the token, to identify THIS device
            let currentDevice = UIDevice()

            // set some 'useful' hardware information params
            clientDevice.operatingSystem = currentDevice.systemName
            clientDevice.osVersion = currentDevice.systemVersion
            clientDevice.deviceType = currentDevice.model
        },
        success: {
            print("UnifiedPush Server registration succeeded")
        },
        failure: { (error: Error!) in
            print("failed to register, error: \(error.localizedDescription)")
        }
)

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

    // Send metrics when app is launched due to push notification
    PushAnalytics.sendMetricsWhenAppLaunched(launchOptions: launchOptions)

    return true
}

func application(_ application: UIApplication,
                 didReceiveRemoteNotification userInfo: [AnyHashable: Any],
                 fetchCompletionHandler: @escaping (UIBackgroundFetchResult) -> Void) {

    // Send metrics when app is launched due to push notification
    PushAnalytics.sendMetricsWhenAppAwoken(applicationState: application.applicationState, userInfo: userInfo)

    // ... Some stuffs ...

    // No additional data to fetch
    fetchCompletionHandler(UIBackgroundFetchResult.noData)

}