package main

import "math/rand/v2"

func generatePassword(sets [][]int, length int) []int {
	password := make([]int, length)

	// Ensure at least one character from each set
	for i, charSet := range sets {
		password[i] = charSet[rand.IntN(len(charSet))]
	}

	// Fill the remaining positions with characters from all sets
	for i := range password[len(sets):] {
		charSetIndex := rand.IntN(len(sets))
		charSet := sets[charSetIndex]
		password[len(sets)+i] = charSet[rand.IntN(len(charSet))]
	}

	// Shuffle
	rand.Shuffle(len(password), func(i, j int) {
		password[i], password[j] = password[j], password[i]
	})

	return password
}