package global

import (
	crand "crypto/rand" // Probably better than math/rand for this
	"log"
)

func GenerateRandomString(length int) string {
	// C# had optional parameters that allowed lowercase for chardata and gpose lobbies, Go doesn't.
	// We can probably get away with just uppercase.
	allowedArray := []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
	random := make([]byte, length)
	_, err := crand.Read(random)
	if err != nil {
		log.Fatalf("Couldn't generate secure slice: %s", err)
	}
	allowedLength := len(allowedArray)
	i := 0
	charArray := make([]rune, length)
	for i < length {
		charArray[i] = allowedArray[int(random[i])%allowedLength] // Casting random[i] due to type mismatch
		i++
	}
	return string(charArray)
}