/* Copyright © 2016 Stefano Pigozzi, Emiliano Maccaferri
 * Released under the GPL v3 license
 */

var mysql = require("mysql");
var bcrypt = require("bcrypt-nodejs");
var conn = require("./connection");
var random = require("randomstring");

module.exports.register = function(username, password, firstname, lastname, rank, classname, response, callback){

  var checkQuery = "SELECT * FROM users WHERE username = ?";

  conn.query(checkQuery, [username], function(err, rows){

    console.log("debug");

    if(rows.length > 0){
      console.log("debug");

      console.log("Username esistente");
      response = {

        success: false,
        error: "username_in_use"

      };

      callback(null, response)

      if(err){

        throw err;
        callback(err, null);
        console.log(err);
        console.log("debug");

      }

    }else{
    var hash = bcrypt.hashSync(password);
    var registerQuery = "INSERT INTO users VALUES(?,?,?,?,?,?)";

    if(rank == 'prof'){

      classname = '';

    }

    conn.query(registerQuery, [username, hash, firstname, lastname, rank, classname], function(err, row){

      if(!err){

        response = {

          success: true

        }

        callback(null, response);

      }else{

        response = {

          success: false,
          error: "generic"

        }

        callback(err, null);

      }

    });

  }

  });

}

module.exports.login = function(username, password, response, callback){

  var loginQuery = "SELECT password,firstname,lastname,rank FROM users WHERE username = ?";
  conn.query(loginQuery, [username], function(err, row){

          console.log("query");

    if(!err){

          console.log("no errori");

      if(row.length > 1){

        console.log("Cos...?");
        response = {

          success: false,
          error: "generic"

        };

      }

      if(row.length == 0){

        console.log("username inesistente");

        response = {

          success: false,
          error: "username_does_not_exist"

        };

      }

      if(row.length == 1){

        console.log("Username ok");

        var rankQuery = "SELECT rank FROM users WHERE username = ?";
        conn.query(rankQuery, [username], function(err, rank){

          global.rank = rank;

        });

        setTimeout(function(){

          var jsonRow = JSON.stringify(row);
          var parsedRow = JSON.parse(jsonRow);
          var hashedPassword = parsedRow[0]["password"];
          var jsonRank = JSON.stringify(global.rank);
          var parsedRank = JSON.parse(jsonRank);
          var actualRank = parsedRank[0]["rank"];
          var name = parsedRow[0]["firstname"];
          var last = parsedRow[0]["lastname"];
          var unixdate = Math.round((new Date()).getTime() / 1000);
          var session = random.generate(32);

          var res = bcrypt.compare(password, hashedPassword, function(err, res){

            if(res){

              console.log("Autorizzato");

              var writeQuery = "INSERT INTO sessions (username, rank, sess_date, session_id) VALUES(?,?,?,?)";
              conn.query(writeQuery, [username, actualRank, unixdate, session], function(err, row){

                console.log(username, actualRank, unixdate, session);
                if(err){

                  throw err;
                  console.log(err);

                }

              });

              response = {

                  success: true,
                  rank: actualRank,
                  "name": name,
                  "lastname": last,
                  sessionid: session

                };

            }else{

              console.log("Password errata");
              response = {

                success: false,
                error: "invalid_password"

              }


            }

            callback(null, response);

        });



      }, 770);

      }

    }

  });

};