OrderManager.java

import java.util.ArrayList;
import java.util.Iterator;
import java.util.Scanner;

public class OrderManager {

    private ArrayList<Order> orders = new ArrayList<>();
    private ArrayList<Order> archived = new ArrayList<>();

    // Needed by DataStore.java
    public ArrayList<Order> getOrdersList() {
        return orders;
    }

    // Add a new order
    public void addOrder(Order o) {
        orders.add(o);
    }

    public void removeOrder(int orderID) {
    Order orderToRemove = null;
    for (Order o : orders) {
        if (o.getOrderID() == orderID) {
            orderToRemove = o;
            break;
        }
    }

    if (orderToRemove == null) {
        System.out.println("Order not found.");
        return;
    }

    orders.remove(orderToRemove);
    System.out.println("Order removed successfully.");
}

    

    // Generate next Order ID
    public int getNextOrderID() {
        return orders.size() + 1;
    }

    // Display all orders
    public void viewOrders() {
        if (orders.isEmpty()) {
            System.out.println("No orders found.");
            return;
        }

        System.out.println("\n--- Orders ---");
        for (Order o : orders) {
            System.out.println(o);
        }
    }

    // Update the status (Pending, Completed)
    public void updateStatus(int orderID, Scanner scanner) {
        for (Order o : orders) {
            if (o.orderID == orderID) {
                System.out.print("Enter new status. Type \"Pending\" or \"Completed\" : ");
                String st = scanner.nextLine();
                o.setStatus(st);
                System.out.println("Order updated.");
                return;
            }
        }
        System.out.println("Order not found.");
    }

    // Move completed orders to archive
    public void archiveCompleted() {
        Iterator<Order> it = orders.iterator();

        while (it.hasNext()) {
            Order o = it.next();
            if (o.status.equalsIgnoreCase("Completed")) {
                archived.add(o);
                it.remove();
            }
        }

        System.out.println("Completed orders archived.");
    }

    // ALERT SYSTEM (this is fine, keep it)
    public void showUpcomingAlerts() {
        if (orders.isEmpty()) {
            System.out.println("No orders available.");
            return;
        }

        var today = java.time.LocalDate.now();
        boolean found = false;

        for (Order o : orders) {
            var d = o.deliveryDate;

            if (d.isBefore(today)) {
                System.out.println("OVERDUE → Order " + o.orderID + ": " + o.briefString());
                found = true;
            } else if (d.equals(today)) {
                System.out.println("DUE TODAY → Order " + o.orderID + ": " + o.briefString());
                found = true;
            } else if (d.equals(today.plusDays(1))) {
                System.out.println("DUE TOMORROW → Order " + o.orderID + ": " + o.briefString());
                found = true;
            } else if (d.isAfter(today) && d.isBefore(today.plusDays(7))) {
                long diff = d.toEpochDay() - today.toEpochDay();
                System.out.println("Due in " + diff + " days → Order " + o.orderID + ": " + o.briefString());
                found = true;
            }
        }

        if (!found)
            System.out.println("No upcoming alerts.");
    }
}