const express = require('express');
const bp = require('body-parser');
const fs = require('fs');
const app = express();
const counterFile = 'counter.json';

app.use(bp.urlencoded({
    extended: false
}))
app.use(bp.json());

app.get('/counter', (req, res) => {
    let obj = {};
    fs.readFile(counterFile, 'utf8', (err, data) => {
      if (err) {
        obj.counter = 1;
      } else {
        obj = JSON.parse(data);
      }
      obj.counter = Number (obj.counter)+1;
      console.log(obj)
      fs.writeFile(counterFile, JSON.stringify(obj), (err) => {
        if (err) {
          res.statusCode = 500;
          res.end();
          return;
        }
        res.end('you viewed this page! ' + obj.counter);
      });
    });
  });
    // fs.readFile(counterFile, 'utf8', (err, data) => {
    //     obj = JSON.parse(data)
    //     obj.count = (Number(obj.count) + 1).toString()

    //     if (err) {
    //         return res.send(err)
    //     }
    //          fs.readFile(counterFile, 'utf8', (err, data) => {
    //     obj = JSON.parse(data)
    //     obj.count = (Number(obj.count) + 1).toString()

    //     if (err) {
    //         return res.send(err)
    //     }

    // fs.writeFile(counterFile, JSON.stringify(obj), (err, data) => {
    //         //  fs.writeFile(counterFile, counter1, (err, data) => {
    //         if (err) {
    //             res.statusCode = 500;
    //             res.send('it has been saved');
    //         } else {
    //             res.json(`paged viewed: ${obj.count}`)
    //             // res.json({success:true});
    //         }
    //     })
    // })

    app.post('/reset', (req, res) => {
        let obj = { counter: 0 };
        fs.writeFile(counterFile, JSON.stringify(obj), (err) => {
          if (err) {
            res.statusCode = 500;
            res.end();
            return;
          } else {
            res.end('okay counter is reset to 0');
          }
        });
      });


app.listen(3000);