var portServer = 8001;                                                                                      
var securePort = 8020;
var express = require('express');
var app = express();
var fs = require('fs');
var request = require('request');
var bodyParser = require("body-parser");
var moment = require('moment');
/*var fetch = require("node-fetch");*/
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
var cron = require('node-cron');
var http = require('http');
var https = require('https');
var MongoClient = require('mongodb').MongoClient;
var sanitize = require('mongo-sanitize');
var cheerio = require("cheerio"); //jQuery Substitute
 
 
const pug = require('pug');
const { exec } = require('child_process');
const path = require('path');
 
app.set('view engine', "pug")
 
app.use("/images", express.static(path.join(__dirname, '/images')));
app.use("/static", express.static(path.join(__dirname, "/static")));


app.get('/', function (req, res) {
       res.send('Hello World');
});

app.get("/getPrice", async function(req, res){
    try{
        console.log(`Getting Price!`);
        //console.log(`Request Body: \n ${JSON.stringify(req.body["instanceCount"])}`);
        let url = req.query["url"];
        let prefix = req.query["prefix"];
        let instanceCount = parseInt(req.query["instanceCount"]);
        let idName = req.query["idName"];
        let finalAnswer = "";

        console.log(`Get Price Info:\n
            Prefix: ${prefix}\n
            InstanceCount: ${instanceCount}\n
            idName: ${idName}\n
            URL: ${url}\n
            `);

        request(url, (err, resp, html) => {
            const $ = cheerio.load(html);
            finalAnswer = "";
            $(idName).each((i, el) => {
                if(i == instanceCount){
                    const item = $(el).text();
                    finalAnswer = item.split(prefix).reverse()[0];
                }
            });
            console.log(`Answer: ${finalAnswer}`);
            res.send(`Answer: ${finalAnswer}`);
            res.end();
        });
    }catch(e){
        console.error(e);
        res.end();
    }
});


const httpServer = http.createServer(app);
//const httpsServer = https.createServer(credentials, app);

var server = httpServer.listen(portServer, function () {
       var host = server.address().address
       var port = server.address().port

       console.log("Server is listening at http://%s:%s", host, port)
});