(function () {
    "use strict";

    var app = WinJS.Application;
    var activation = Windows.ApplicationModel.Activation;
    var appManager = null;

    navigator.gamepadInputEmulation = "keyboard"; 

    app.onactivated = function (args) {
        CloudExperienceHost.Telemetry.AppTelemetry.getInstance().logEvent("AppActivated", JSON.stringify({ 'Kind': args.detail.kind, 'PreviousExecutionState': args.detail.previousExecutionState }));
        if (args.detail.kind === activation.ActivationKind.webAccountProvider) {
            appManager = new CloudExperienceHost.MSATokenProviderManager(new CloudExperienceHost.AppView(document, _htmlRoot, _view, _progress, _progressControl, _progressText));
        } else {
            appManager = new CloudExperienceHost.AppManager(new CloudExperienceHost.AppView(document, _htmlRoot, _view, _progress, _progressControl, _progressText));
        }

        args.setPromise(WinJS.UI.processAll().then(function () {
            var previousExecutionState = args.detail.previousExecutionState;
            switch (args.detail.previousExecutionState) {
                case activation.ApplicationExecutionState.notRunning:       
                case activation.ApplicationExecutionState.closedByUser:     
                    appManager.start(args);
                    break;

                case activation.ApplicationExecutionState.suspended:        
                    break;
                case activation.ApplicationExecutionState.terminated:       
                    appManager.resume(args);
                    break;

                case activation.ApplicationExecutionState.running:          
                    
                    appManager.start(args);
                    break;

                default:
                    throw new Error(CloudExperienceHost.ErrorNames.ActivationNotSupported);
                    break;
            }
        }));
    };

    app.oncheckpoint = function (args) {
        
        CloudExperienceHost.Telemetry.AppTelemetry.getInstance().logEvent("AppCheckpoint");
        CloudExperienceHost.Telemetry.AppTelemetry.getInstance().appCheckpoint();

        appManager.checkpoint(args);
    };

    app.onloaded = function () {
        
        WinJS.Resources.processAll();
    }

    app.onerror = function (e) {
        return appManager ? appManager.onUnhandledException(e) : null;
    }

    app.restart = function (uri) {
        CloudExperienceHost.Telemetry.AppTelemetry.getInstance().logEvent("AppRestart", uri);
        appManager.restart(uri);
    };

    app.start();
})();