uniquePasswordGenerator

/*
Generate a password.
Password should have:
1. At least one lowercase letter. That’s any letter from a to z.
2. At least one uppercase letter. That any from A to Z.
3. At least one number. Any number from 0 to 9 will do
4. And at least one special character. This can be: !, @, # , * , (, ) , % or any other.
5. And length should be random and between 8-20 characters.
Each new password must be unique.
Test@129 - valid
TestAbc - invalid
*/

// Plan (MVP):
// /x/ no input
// /x/ initialize arrays with chars
// /x/ use Math.random(range) for:
// // /x/ password length
// // /x/ curr char
// /x/ flags for missing char type
// /x/ while missing char type, keep generating random char on random index, override flags
// /x/ while list of unique passwords inlucludes generated password, keep generating new passwords

const generatePassword = () => {
  const result = [];
  const lowercaseLetters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
  const uppercaseLetters = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
  const numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
  const specialChars = ['!', '@', '#', '*', '(', ')', '%'];
  const allChars = [...lowercaseLetters, ...uppercaseLetters, ...numbers, ...specialChars];
  const randomLength = Math.trunc(Math.random() * 13) + 8;

  for (let i = 0; i < randomLength; i++) {
    const randomChar = allChars[Math.trunc(Math.random() * 69)];
    result.push(randomChar);
  }

  let hasNoLowercaseLetters = lowercaseLetters.some(char => result.includes(char)) === false;
  let hasNoUppercaseLetters = uppercaseLetters.some(char => result.includes(char)) === false;
  let hasNoNumbers = numbers.some(char => result.includes(char)) === false;
  let hasNoSpecialChars = specialChars.some(char => result.includes(char)) === false;

  while (hasNoLowercaseLetters || hasNoUppercaseLetters || hasNoNumbers || hasNoSpecialChars) {
    const randomChar = allChars[Math.trunc(Math.random() * 69)];
    const randomIndex = Math.trunc(Math.random() * randomLength);
    result[randomIndex] = randomChar;
    hasNoLowercaseLetters = lowercaseLetters.some(char => result.includes(char)) === false;
    hasNoUppercaseLetters = uppercaseLetters.some(char => result.includes(char)) === false;
    hasNoNumbers = numbers.some(char => result.includes(char)) === false;
    hasNoSpecialChars = specialChars.some(char => result.includes(char)) === false;
  }

  return result.join('');
};

const uniquePasswords = [];

const generateUniquePassword = () => {
  let result = generatePassword();

  while (uniquePasswords.includes(result)) {
    result = generatePassword();
  }

  uniquePasswords.push(result);
  return result;
};

console.log(generateUniquePassword());
console.log(generateUniquePassword());
console.log(generateUniquePassword());
console.log(generateUniquePassword());