Amazon Echo to Arduino Connection

'use strict';
//https://stackoverflow.com/questions/37325775/amazon-lambda-to-firebase
//sice me
var firebase = require("firebase");

exports.handler = (event, context, callback) => {
    context.callbackWaitsForEmptyEventLoop = false;  //<---Important

    var config = {
    apiKey: "foo",
    authDomain: "foo",
    databaseURL: "foo",
    projectId: "foo",
    storageBucket: "foo",
    messagingSenderId: "foo"
};

if(firebase.apps.length == 0) {   // <---Important!!! In lambda, it will cause double initialization.
        firebase.initializeApp(config);
    }

var defaultDatabase = firebase.database();
// if(event.request.type) == "IntentRequest"{
//     if(event.request.intent.name) == "changeLightState"{
//         firebase.database().ref('lightState/').set({
//             state: event.request.intent.slots.command.value
//         });
//     }
// }
    
    if(event.request.intent.name == "changeLightState")
    var lState = event.request.intent.slots.command.value;
    firebase.database().ref('lightState/').set({
         state: lState
    });
    var response = "Mission Accomplished";
    var res = buildRes(response)

    setTimeout(function(){context.succeed(res);}, 1000);

}
//change the lambda function on the skill

// Helpers



function buildRes(response) {
    return {
        version: "1.0",
        "response": {
        "outputSpeech": {
            "type": "PlainText",
            "text": response,
            },
            "shouldEndSession": true
        }  
    } 

}