Program.cs

using FluentValidation;
using VeterinaryManagementConsole.Interfaces;
using VeterinaryManagementConsole.Models;
using VeterinaryManagementConsole.Repositories;
using VeterinaryManagementConsole.Services;
using VeterinaryManagementConsole.Utils;
using VeterinaryManagementConsole.Validators;

namespace VeterinaryManagementConsole;

public class Program
{
    public static void Main(string[] args)
    {
        // --- 1. COMPOSITION ROOT (DEPENDENCY WIRING) ---
        IEmployeeRepository employeeRepository = new EmployeeRepository();
        IClientRepository clientRepository = new ClientRepository();
        IPetRepository petRepository = new PetRepository();
        IAppointmentRepository appointmentRepository = new AppointmentRepository();

        IValidator<Client> clientValidator = new ClientValidator();
        IValidator<Pet> petValidator = new PetValidator();
        IValidator<Employee> employeeValidator = new EmployeeValidator();
        IAuthService authService = new ServiceAuthentication(employeeRepository);
        IEmployeeService employeeService = new EmployeeService(
            employeeRepository,
            employeeValidator
        );
        IClientServices clientService = new ServicesClient(clientRepository, clientValidator);
        IPetService petService = new ServicesPets(petRepository, clientRepository, petValidator);

        IAppointmentService appointmentService = new ServiceAppointment(
            appointmentRepository,
            petRepository,
            employeeRepository
        );

        // --- 2. MAIN APPLICATION LOOP ---
        bool keepRunningApp = true;
        while (keepRunningApp)
        {
            Console.Clear();
            Console.WriteLine("=== Veterinary Management System ===");
            Console.WriteLine("Please log in. (or type 'exit' or 'q' to quit)");

            Console.Write("Username: ");
            string? username = Console.ReadLine();
            if (
                string.Equals(username, "exit", StringComparison.OrdinalIgnoreCase)
                || string.Equals(username, "q", StringComparison.OrdinalIgnoreCase)
            )
            {
                keepRunningApp = false;
                continue;
            }

            Console.Write("Password: ");
            string? password = Console.ReadLine();

            var loggedInEmployee = authService.Login(username ?? "", password ?? "");

            if (loggedInEmployee == null)
            {
                Console.WriteLine("\nIncorrect credentials. Press any key to retry...");
                Console.ReadKey();
                continue;
            }

            Console.WriteLine(
                $"\nWelcome, {loggedInEmployee.Name}! (Role: {loggedInEmployee.Role})"
            );
            Console.WriteLine("Press any key to load menu...");
            Console.ReadKey();

            // --- 3. ROLE-BASED MENU DISPATCHER ---
            // This is where we launch the correct module and add services necessary.
            switch (loggedInEmployee.Role)
            {
                case "Receptionist":
                    var receptionistMenu = new MenuReceptionist(
                        clientService,
                        petService,
                        appointmentService,
                        employeeRepository
                    );

                    receptionistMenu.Show();
                    break;

                case "Veterinarian":
                    var vetMenu = new MenuVeterinarian(appointmentService, petService);
                    vetMenu.Show(loggedInEmployee);
                    break;

                case "Admin":
                    var adminMenu = new MainAdmin(
                        employeeService,
                        employeeRepository,
                        employeeValidator
                    );
                    adminMenu.Show(loggedInEmployee);
                    break;
                default:
                    Console.WriteLine("Error: Role not recognized. Logging out.");
                    Console.ReadKey();
                    break;
            }
        }
    }
}