package common

import (
	"crypto/rand"
	"math/big"
)

// RandomString generates a string with the given length using crypt/rand
func RandomString(length int) (string, error) {
	const characters = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-_="
	byteSlice := make([]byte, length)
	for i := 0; i < length; i++ {
		randomInt, err := rand.Int(rand.Reader, big.NewInt(int64(len(characters))))
		if err != nil {
			return "", err
		}
		byteSlice[i] = characters[randomInt.Int64()]
	}

	return string(byteSlice), nil
}