script.js

// Get references to the #generate element
const generateBtn = document.querySelector("#generate");
const specialCharacters = "#$%&'()*+,-./:;<=>?@[\]^_`{|}~";
generateBtn.addEventListener('click',writePassword)

// Write password to the #password input
function writePassword() {
  var password = generatePassword();
  var passwordText = document.querySelector("#password");
 
  passwordText.value = password;
}
  // Prompts that come up after you click generate password
function generatePassword() {
  var passwordLength = prompt("Please enter the number of characters you want for you new password.  It must be more than 12 but less than 128.");

  var numbers = confirm("Do you want numbers in your password?");

  var lowerCases = confirm("Do you want lowercases in your password?");

  var upperCases = confirm("Do you want uppercases in your password?");

  var special = confirm("Do you want special characters in your password?");

  // this is a minimum count for numbers, lowerCases, upperCases & specialCharacters
  var minimumCount = 0;
  var maximumCount =35;



  // Empty minimums for numbers, lowerCases, upperCases & specialCharacters

  var minimumNumbers = "";
  var minimumLowerCases = "";
  var minimumUpperCases = "";
  var minimumSpecialCharacters = "";


  // Generator functions**
  var functionArray = {
    getNumbers: function() {
      return String.fromCharCode(Math.floor(Math.random() * 10 + 48));
    },

    getLowerCases: function() {
      return String.fromCharCode(Math.floor(Math.random() * 26 + 97));
    },

    getUpperCases: function() {
      return String.fromCharCode(Math.floor(Math.random() * 26 + 65));
    },

    getSpecialCharacters: function() {
      return specialCharacters[Math.floor(Math.random() * specialCharacters.length)]
    }

}

  // Checks to make sure user selected ok for all and uses empty minimums from above

  if (numbers === true) {
    minimumNumbers = functionArray.getNumbers();
    minimumCount++;

  }

  if (lowerCases === true) {
    minimumLowerCases = functionArray.getLowerCases();
    minimumCount++;

  }

  if (upperCases === true) {
    minimumUpperCases = functionArray.getUpperCases();
    minimumCount++;

  }

  if (special === true) {
    minimumSpecialCharacters = functionArray.getSpecialCharacters();
    minimumCount++;

  }

  // empty string variable for the for loop below
  var Genpass = "";

  // loop getting random characters
  for (let i = 0; i < (parseInt(passwordLength) - minimumCount); i++) {
    var randomNumberPicked = Math.floor(Math.random() * 4);

   Genpass += randomNumberPicked;

  }

// Add event listener to generate button
generateBtn.addEventListener("click", writePassword)

  // to make sure characters are added to the password
  Genpass += minimumNumbers;
  Genpass += minimumLowerCases;
  Genpass += minimumUpperCases;
  Genpass += minimumSpecialCharacters;
  return Genpass
}