TicketApp.java

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

public class TicketApp {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        boolean appRunning = true;

        // Separate lists (as required)
        ArrayList<Integer> ticketIds = new ArrayList<>();
        ArrayList<String> ticketDescriptions = new ArrayList<>();
        ArrayList<String> ticketPriorities = new ArrayList<>();

        // Priority levels array
        String[] priorityLevels = {"LOW", "MEDIUM", "HIGH"};

        while (appRunning) {

            System.out.println("\n===== MAIN MENU =====");
            System.out.println("1 - Customer");
            System.out.println("2 - Admin");
            System.out.println("3 - Exit");
            System.out.print("Select option: ");

            int mainChoice = Integer.parseInt(input.nextLine());

            // ---------------- CUSTOMER ----------------
            if (mainChoice == 1) {

                boolean customerMenu = true;

                while (customerMenu) {

                    System.out.println("\n--- Customer Menu ---");
                    System.out.println("1 - Create Ticket");
                    System.out.println("2 - Back");
                    System.out.print("Choose: ");

                    int customerChoice = Integer.parseInt(input.nextLine());

                    if (customerChoice == 1) {

                        System.out.print("Enter Ticket ID: ");
                        int id = Integer.parseInt(input.nextLine());

                        System.out.print("Enter Description: ");
                        String description = input.nextLine();

                        System.out.println("Select Priority:");
                        System.out.println("1. LOW");
                        System.out.println("2. MEDIUM (default)");
                        System.out.println("3. HIGH");
                        System.out.print("Choice: ");

                        int pChoice = Integer.parseInt(input.nextLine());

                        String priority = "MEDIUM";

                        if (pChoice >= 1 && pChoice <= 3) {
                            priority = priorityLevels[pChoice - 1];
                        }

                        ticketIds.add(id);
                        ticketDescriptions.add(description);
                        ticketPriorities.add(priority);

                        System.out.println("Ticket added successfully ✔");
                    }

                    else if (customerChoice == 2) {
                        customerMenu = false;
                    }

                    else {
                        System.out.println("Invalid choice.");
                    }
                }
            }

            // ---------------- ADMIN ----------------
            else if (mainChoice == 2) {

                System.out.print("Enter Admin PIN: ");
                int pin = Integer.parseInt(input.nextLine());

                if (pin == 1234) {

                    boolean adminMenu = true;

                    while (adminMenu) {

                        System.out.println("\n--- Admin Menu ---");
                        System.out.println("1 - View Tickets");
                        System.out.println("2 - Update Description");
                        System.out.println("3 - Back");
                        System.out.print("Choose: ");

                        int adminChoice = Integer.parseInt(input.nextLine());

                        if (adminChoice == 1) {

                            if (ticketIds.isEmpty()) {
                                System.out.println("No tickets available.");
                            } else {
                                for (int i = 0; i < ticketIds.size(); i++) {
                                    System.out.println("ID: " + ticketIds.get(i));
                                    System.out.println("Description: " + ticketDescriptions.get(i));
                                    System.out.println("Priority: " + ticketPriorities.get(i));
                                    System.out.println("-------------------");
                                }
                            }
                        }

                        else if (adminChoice == 2) {

                            System.out.print("Enter Ticket ID to update: ");
                            int searchId = Integer.parseInt(input.nextLine());

                            boolean found = false;

                            for (int i = 0; i < ticketIds.size(); i++) {

                                if (ticketIds.get(i) == searchId) {

                                    System.out.print("Enter new description: ");
                                    String newDesc = input.nextLine();

                                    ticketDescriptions.set(i, newDesc);

                                    System.out.println("Ticket updated successfully ✔");
                                    found = true;
                                    break;
                                }
                            }

                            if (!found) {
                                System.out.println("Ticket not found.");
                            }
                        }

                        else if (adminChoice == 3) {
                            adminMenu = false;
                        }

                        else {
                            System.out.println("Invalid option.");
                        }
                    }
                }

                else {
                    System.out.println("Wrong PIN. Access denied.");
                }
            }

            else if (mainChoice == 3) {
                System.out.println("Closing program... Goodbye!");
                appRunning = false;
            }

            else {
                System.out.println("Invalid selection.");
            }
        }

        input.close();
    }
}