package com.sinata.appointment.util;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.atomic.AtomicInteger;

public final class OrderNoGenerator {

    private static final AtomicInteger SEQ = new AtomicInteger(0);
    private static final DateTimeFormatter FMT = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");

    private OrderNoGenerator() {}

    public static String next() {
        return "ORD" + LocalDateTime.now().format(FMT) + String.format("%04d", SEQ.incrementAndGet() % 10000);
    }
}