var express = require('express');
var app = express();
var fs = require("fs");
var bodyParser = require('body-parser');
// Create application/x-www-form-urlencoded parser
var urlencodedParser = bodyParser.urlencoded({ extended: false })
var authenticatedUser = null;
app.use(express.static('public'));
app.get('/', function (req, res) {
  res.sendFile( __dirname + "/" + "sign.html" );
})
app.post('/login', urlencodedParser, function (req, res) {
// Prepare output in JSON format
  Email = req.body.Email;
  password = req.body.password;
//  console.log(username);
//  console.log(password);
  fs.readFile( __dirname + "/" + "users.json", 'utf8', function (err, data) {
    data = JSON.parse( data );
    var flag = 0;
    for (var user in data) {
      if(username == data[user].name){flag = 1; authenticatedUser = user; break;}
      else{flag = 0;  }
    }
    if(flag == 1){
      fs.readFile( __dirname + "/" + "tables.json", 'utf8', function (err1, tables_data) {
        tables_data = JSON.parse(tables_data);
        console.log(tables_data[user].html);
        res.end((tables_data[user].html));
      });

    }
    else{res.sendFile( __dirname + "/" + "sign.html" );}
  });
 })
 app.post('/register', urlencodedParser, function (req, res) {
 // Prepare output in JSON format
   YourName = req.body.YourName;
   Email = req.body.Email;
   password = req.body.password;
 //  console.log(username);
 //  console.log(password);
   fs.readFile( __dirname + "/" + "users.json", 'utf8', function (err, data) {
     data = JSON.parse( data );
     var flag = 0;
     for (var user in data) {
       if(username == data[user].name){flag = 1; authenticatedUser = user; break;}
       else{flag = 0;  }
     }
     if(flag == 1){
       alert("you have been registered before");
       fs.readFile( __dirname + "/" + "tables.json", 'utf8', function (err1, tables_data) {
         tables_data = JSON.parse(tables_data);
         console.log(tables_data[user].html);
         res.end((tables_data[user].html));
       });

     }
     else{
       fs.readFile( __dirname + "/" + "users.json", 'utf8', function (err, data) {
              data = JSON.parse( data );
              data["user4"] = user["user4"];
              console.log( data );
              res.end( JSON.stringify(data));
              fs.writeFile(__dirname + "/" + "users.json",JSON.stringify(data), function (err) {
              if (err) return console.log(err);
              console.log(JSON.stringify(data));
               });

           });
     }
   });
  })
 app.post('/save', urlencodedParser, function (req, res) {
 // Prepare output in JSON format
   body = req.body.body1;
   console.log(body);
   /*fs.readFile( __dirname + "/" + "tables.json", 'utf8', function (err, data) {
     data = JSON.parse( data );
     data[authenticatedUser].html = body;
     fs.writeFile(__dirname + "/" + "tables.json",JSON.stringify(data), function (err) {
        if (err) return console.log(err);
        console.log(JSON.stringify(data));
      });
  });
*/

  })

var server = app.listen(8081, function () {
var host = server.address().address
var port = server.address().port
console.log("Example app listening at http://%s:%s", host, port) })