var express = require('express');
var app = express();
var fs = require("fs");
var user_counter =0;

 app.post('/update', function (req, res) {
  fs.writeFileSync(__dirname +'/users.json', req.body.newdata);
    res.writeHead(200, "OK", {'Content-Type' : 'text/html'});
        res.end();
});


app.use(express.static(__dirname));

app.get('/toDoList', function (req, res) {

var temp = new Object();
temp.name = req.query.email4;
temp.password = req.query.password4 ;


   res.sendFile( __dirname + "/" + "final.html");
  var jas={};var  flag = 0;
  var data = String(fs.readFileSync( "users.json"));

  // function (err, data) {
       jas = JSON.parse( data );
              console.log("lolo");

       // console.log(jas[0].email);
       for(var i in jas)
       {

          if( req.query.email4 === jas[i].email && req.query.password4 === jas[i].password ){
              console.log("done two");
              console.log(jas[i].email);
              flag = 1 ;


          }

                  if (flag === 1)
         {         res.sendFile( __dirname + "/" + "final.html");
}

                 console.log(jas[i].email);

        }


// }


        if (flag === 0 ) {

          res.redirect('/interface.html');




       }



 })
app.get('/interface',function(req,res){
  res.sendFile( __dirname + "/" + "interface.html");


});




app.get('/addUser', function (req, res) {
// First read existing users.
res.sendFile("/final.html",{root:__dirname});
// user = {
//     "user":{
//        name:req.query.name3,
//        email:req.query.email3,
//        password:req.query.password3,
//        html:"interface.html"
//      }

//    };
var user = new Object();
user.name =req.query.name3;
user.email = req.query.email3;
user.password = req.query.password3;




  var jas={};
  var  flag = 0;
var data = String(fs.readFileSync("users.json"));

 // function (err, data) {

       jas = JSON.parse( data );

       for(var i in jas)
       {
          // console.log(jas[i].email); //ERROR cant read email property for undefined


          if(  jas[i].email === req.query.email3 || jas[i].name === req.query.name3){  ////////////////// heeeeeeeeeeeeeeeeereeeeeeeee

              flag = 1 ;
  console.log('error');

          }
                       //  console.log(user.email);//gives the email
                       // console.log(req.query.email3); // gives the email


        }


// };


        if (flag === 0 ) {
 jas ["user"+user_counter]= user;
             // jas[0].email =req.query.email3;
             // jas[0].name=req.query.name3;
             // jas[0].password=req.query.password3;
             console.log('ana henaa');
              // console.log( '7amada');
             jas = JSON.stringify(jas);
             //fs.appendFile
              fs.writeFile("users.json", jas,'utf8');

              user_counter++;
              res.sendFile( __dirname + "/" + "final.html");
             // res.end( data );



       }
// else if (flag === 1 ){
//   console.log('hena 2');
// res.redirect('/interface');

// }

 })
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)
})