//simulate button click
function simulateClick(str) {
    var buttons = document.getElementsByTagName('input');
    for(var i = 0; i < buttons.length; i++)
    {
       if(buttons[i].type == 'submit' && buttons[i].value == str)
       {
           buttons[i].click();
           break;
       }
    }
}

//return submit button value to simulate the click
function getInputValue() {
    var buttons = document.getElementsByTagName('input');
    var res = "";
    for(var i = 0; i < buttons.length; i++)
    {
       if(buttons[i].type == 'submit' && buttons[i].value != "")
       {
           res = buttons[i].value;
           break;
       }
    }
    return res;
}

//generate random string
function randomStr(digits) {
  var res = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for (var i = 0; i < digits; i++)
    res += possible.charAt(Math.floor(Math.random() * possible.length));
  return res;
}

//generate random number in a specific range
function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

//generate credentials
function simulateInput(acc, pass) {
    var rand = getRandomInt(1,5);       // generate random num to make a random e-mail
    var post = "";

    if (rand == 1) post = "@gmail.com";
    else if (rand == 2) post = "@yahoo.com";
    else if (rand == 3) post = "@hotmail.com";
    else if (rand == 4) post = "@outlook.com";
    else post = "@mail.com";

    document.getElementsByName('reg_username')[0].value = acc;
    document.getElementsByName('reg_email')[0].value = acc + post;
    document.getElementsByName('reg_password')[0].value = pass;
    document.getElementsByName('reg_password2')[0].value = pass;
}

/* do not touch*/
var counter;
var regBtn = getInputValue();
const length = 49;
/* do not touch*/

var useRandGen = false;         // If true then chooses the length of the username and password randomly
var fakeNum = 1000;                 // total fake accounts to create

startJob = function() {
    for (counter = 0; counter < fakeNum; counter++)
    {
        var temp;

        if (useRandGen) {
            var newUser = randomStr(getRandomInt(10,49));   // generate random username with a random length of characters (10-49)
            var newPass = randomStr(getRandomInt(10,49));   // generate random password with a random length of characters (10-49)
            simulateInput(newUser, newPass);                                // simulate user input
            simulateClick(regBtn);                                              // simulate button click
        }
        else {
            var newUser = randomStr(length);                        // generate random username with a const length of 49 chars (MAX: 50)
            var newPass = randomStr(length);                        // generate random password with a const length of 49 chars (MAX: 50)
            simulateInput(newUser, newPass);                            // simulate user input
            simulateClick(regBtn);                                          // simulate button click
        }
    }
    console.log('Task has been finished. Created: ' + fakeNum + ' fake accounts in total!');
}
startJob();