SmartStoreApp.java

import customer.Customer;
import customer.Customers;
import group.Group;
import group.GroupType;
import group.Groups;
import group.Parameter;
import menu.*;


public class SmartStoreApp {
    private final Groups allGroups = Groups.getInstance();
    private final Customers allCustomers = Customers.getInstance();
    private final MainMenu mainMenu = MainMenu.getInstance();
    private static SmartStoreApp smartStoreApp;

    public static SmartStoreApp getInstance(){
        if(smartStoreApp == null){
            smartStoreApp = new SmartStoreApp();
        }
        return smartStoreApp;
    }
    private SmartStoreApp(){}
    public void details(){
        System.out.println("\n\n===========================================");
        System.out.println(" Title : SmartStore Customer Classification");
        System.out.println(" Release Date : 23.04.27");
        System.out.println(" Copyright 2023 Eunbin All rights reserved.");
        System.out.println("===========================================\n");
    }
    public SmartStoreApp test(){
        allGroups.add(new Group(new Parameter(10, 100000), GroupType.GENERAL));
        allGroups.add(new Group(new Parameter(20, 200000), GroupType.VIP));
        allGroups.add(new Group(new Parameter(30, 300000), GroupType.VVIP));

        for (int i = 0; i < 26; i++) {
            allCustomers.add(new Customer(
                    Character.toString(
                            (char) ('a' + i)),
                    (char) ('a' + i) + "123",
                    ((int) (Math.random() * 5) + 1) * 10,
                    ((int) (Math.random() * 5) + 1) * 100000));
        }

        System.out.println("allCustomers = " + allCustomers);
        System.out.println("allGroups = " + allGroups);

        // @TODO: refresh do not implemented yet.
        allCustomers.refresh();

        return this; // smartStoreApp
    }
    public void run() {
        details();
        mainMenu.manage();
    }

}