function testDialogflow(request: express.Request, response: express.Response) {
    const app = new DialogflowApp({request, response});
    const actionMap = new Map();
    actionMap.set(app.StandardIntents.MAIN, () => {
        const order: Transactions.Order = app.buildOrder('foo');
        app.askForTransactionDecision(order, {
            type: app.Transactions.PaymentType.PAYMENT_CARD,
            displayName: 'VISA-1234',
            deliveryAddressRequired: true
        });
    });
    app.handleRequest(actionMap);
}

export const helloWorld = functions.https.onRequest((request, response) => {
    console.log('Request headers: ' + JSON.stringify(request.headers));
    console.log('Request body: ' + JSON.stringify(request.body));


    let dialogApp = new DialogflowApp({ request, response });

    function ingredientList(app: DialogflowApp) {
        app.tell(`I see you want to know about ${app.getArgument('recipe_name')}`);
    }

    let actionMap = new Map();
    actionMap.set('IngredientList', ingredientList);

    dialogApp.handleRequest(actionMap);
});

 function ingredientList(app: DialogflowApp) {
     app.tell(`I see you want to know about ${app.getArgument('recipe_name')}`);
 }