infoalloggi-monorepo/apps/infoalloggi/src/lib/basicPwGenerator.ts

export const generatePassword = (length = 10) => {
	const upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	const lower = "abcdefghijklmnopqrstuvwxyz";
	const numbers = "0123456789";
	const special = "!@#$%^&*()_+[]{}<>?/|";

	// Ensure at least one from each required set
	const required = [
		upper[Math.floor(Math.random() * upper.length)],
		lower[Math.floor(Math.random() * lower.length)],
		numbers[Math.floor(Math.random() * numbers.length)],
		special[Math.floor(Math.random() * special.length)],
	];

	const allChars = upper + lower + numbers + special;
	const remainingLength = length - required.length;
	const passwordArr = [...required];

	for (let i = 0; i < remainingLength; i++) {
		passwordArr.push(allChars[Math.floor(Math.random() * allChars.length)]);
	}

	// Fisher-Yates shuffle
	for (let i = passwordArr.length - 1; i > 0; i--) {
		const j = Math.floor(Math.random() * (i + 1));
		[passwordArr[i], passwordArr[j]] = [passwordArr[j], passwordArr[i]];
	}

	return passwordArr.join("");
};