package nfs

import (
	"fmt"

	"github.com/darroyo/nasctl/internal/system"
)

func UniqueFSID(used map[uint32]struct{}) (uint32, error) {
	for i := 0; i < 64; i++ {
		n, err := system.GenerateRandomFSID()
		if err != nil {
			return 0, err
		}
		if _, dup := used[n]; !dup {
			return n, nil
		}
	}
	return 0, fmt.Errorf("fsid space exhausted after 64 attempts")
}