package com.arms.api.util;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.UUID;

public class UUIDUtil {

    public static String createShortUUID() {
        String uuidString = UUID.randomUUID().toString();
        byte[] uuidStringBytes = uuidString.getBytes(StandardCharsets.UTF_8);
        byte[] hashBytes;
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
            hashBytes = messageDigest.digest(uuidStringBytes);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("createShortUUID :: SHA-256 algorithm not found", e);
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 4; i++) {
            sb.append(String.format("%02x", hashBytes[i]));
        }
        return sb.toString();
    }

}