CourseProject1125/CourseProject1125/Views/MainWindow.axaml.cs

using System;
using Avalonia.Controls;
using CourseProject1125.ViewModels;

namespace CourseProject1125.Views;

public partial class MainWindow : Window
{
    public MainWindow()
    {
        var viewModel = new MainWindowViewModel();
        viewModel.OnLoginSuccess = (roleId) => NavigateByRole(roleId);
        DataContext = viewModel;

        InitializeComponent();
    }

    private void NavigateByRole(int roleId)
    {
        Window? nextWindow = null;
        switch (roleId)
        {
            case 1: 
                nextWindow = new AdminWindow();
                break;
            case 2: 
                nextWindow = new LibrarianWindow();
                break;
            case 3: 
                nextWindow = new ReaderWindow();
                break;
            default:
                if (DataContext is MainWindowViewModel vm)
                {
                    vm.ErrorMessage = "Неизвестная роль пользователя.";
                }
                return;
        }
        
        if (nextWindow != null)
        {
            nextWindow.Show();
            this.Close(); 
        }
    }
}