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
var puppeteer = require("puppeteer");
const { createWorker } = require("tesseract.js");
 
 
// 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("/images", express.static(path.join(__dirname, "/savedImages")));
app.use("/static", express.static(path.join(__dirname, "/static")));

const baseFilePath = "./savedImages";

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

app.get("/upload", function(req, res){
    res.sendFile(path.join( __dirname, "views/Upload.html"));
});

app.get("/takeScreenshot", async function(req, res){
    let url = req.query["url"];
    let name = req.query["name"];

    puppeteer.launch({
        headless: "new",
        defaultViewport: {
          width: 1280,
          height: 2000,
        },
      })
      .then(async (browser) => {
        const page = await browser.newPage();
        await page.goto(url);
        await page.screenshot({ path: `${baseFilePath}/${name}.png` });
        await browser.close();
      });
      res.send("204 no content");
      res.end();
});

app.get("/getValueFromImage", async function(req, res){
    console.log("Pulling info from image");
    let name = req.query["name"]; 
    let top = req.query["top"]; //374
    let left = req.query["left"]; //596
    let width = req.query["width"];//75
    let height = req.query["height"];//30

    console.log("Loading Image");
    const img = fs.readFileSync(`${baseFilePath}/${name}.png`);

    const worker = await createWorker("eng");
    const rectangle = { left: left, top: top, width: width, height: height };
    console.log(JSON.stringify(rectangle));
    (async () => {
      const {
        data: { text },
      } = await worker.recognize(img,
        { rectangle }
      );
      console.log("Found Price!");
      res.send(text);
      res.end();
      console.log(text);
      await worker.terminate();
    })();
    
    
});

app.get("/getVisualPrice", async function(req, res){
    console.log("Getting Visual Price");
    let url = req.query["url"];
    let name = req.query["name"]; 
    let top = req.query["top"]; //374
    let left = req.query["left"]; //596
    let width = req.query["width"];//75
    let height = req.query["height"];//30

    puppeteer.launch({
        headless: "new",
        defaultViewport: {
          width: 1280,
          height: 2000,
        },
      })
      .then(async (browser) => {
        const page = await browser.newPage();
        await page.goto(url);
        await page.screenshot({ path: `${baseFilePath}/${name}.png` });
        await browser.close();

        console.log("Reading Image");
        const img = fs.readFileSync(`${baseFilePath}/${name}.png`);

        const worker = await createWorker("eng");
        const rectangle = {
          left: left,
          top: top,
          width: width,
          height: height,
        };
        let myText = "Default";
        (async () => {
          console.log("Finding text");
          const {
            data: { text },
          } = await worker.recognize(img, { rectangle });
          res.send(text);
          res.end();
          console.log(text);
          await worker.terminate();
        })();

      });

});

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"];


        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);
            console.log(html);
            let finalAnswer = "";
            if(instanceCount == 0){
                console.log("Getting single instance");
                let item = {};
                console.log($(idName));
                
                $(idName).each((i, el) => {
                    //console.log("item");
                    //console.log(el);
                   item = $(el).text(); 
                });
                console.log(JSON.stringify(item));
                finalAnswer = item;
            }else{
                $(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)
});