package vn.sis.appointment;

public final class Application {
    private Application() {
    }

    public static void main(String[] args) throws Exception {
        int port = resolvePort();
        AppointmentWebServer server = new AppointmentWebServer(port);
        server.start();

        System.out.printf("S.I.S Appointment Java Web dang chay tai http://localhost:%d%n", port);
        System.out.println("Nhan Ctrl+C de dung ung dung.");
    }

    private static int resolvePort() {
        String value = System.getenv().getOrDefault("PORT", "8080").trim();
        try {
            int port = Integer.parseInt(value);
            if (port < 1 || port > 65535) {
                throw new IllegalArgumentException("PORT phai nam trong khoang 1-65535.");
            }
            return port;
        } catch (NumberFormatException ex) {
            throw new IllegalArgumentException("Bien moi truong PORT khong hop le: " + value, ex);
        }
    }
}