// Start writing Firebase Functions
// https://firebase.google.com/docs/functions/typescript

import * as admin from 'firebase-admin';
import fetch from 'node-fetch';
import * as functions from 'firebase-functions';


//replace with MTA API URL and key
const myUrl = "https://jsonplaceholder.typicode.com/posts/1";

var cachedMessage = {};

const makeHttpRequest = async (url:string) => {
  try {
    console.log('making http request');
    const response = await fetch(url);
    console.log("fetched  response:" + response);
    const json = await response.json();
    console.log("Formatted JSON:" + json);
    return json;
  } catch (error) {
    console.log(error);
  }
};

console.log('Calling makeHttpRequest(url)');
makeHttpRequest(myUrl);
console.log('await statement is being ignored if this is logged before makeHttpRequest(url) is complete');
admin.initializeApp();

//correct way to schedule cron instead of setInterval
exports.scheduledFunction = functions.pubsub.schedule('every 2 minutes').onRun((context) => {
    cachedMessage = makeHttpRequest(myUrl);
});

//expose the response via endpoint
export const requestEndpoint = functions.https.onRequest((request, response) => {
    response.send(cachedMessage)
});