BCSH1-TournamentApp/TournamentOrganizer/ViewModels/MainViewModel.cs

using System.Threading.Tasks;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace TournamentOrganizer.ViewModels;

public partial class MainViewModel : ViewModelBase
{
    [ObservableProperty]
    private ViewModelBase _currentView;

    [ObservableProperty]
    private string _title = "Tournament Organizer";

    public MainViewModel()
    {
        CurrentView = new HomeViewModel();
    }

    [RelayCommand]
    private void NavigateToHome()
    {
        CurrentView = new HomeViewModel();
        Title = "Tournament Organizer";
    }

    [RelayCommand]
    private async Task NavigateToTeams()
    {
        var teamsVm = new TeamsViewModel();
        CurrentView = teamsVm;
        Title = "Teams Management";
        await teamsVm.LoadTeams();
    }

    [RelayCommand]
    private async Task NavigateToGames()
    {
        var gamesVm = new GamesViewModel();
        CurrentView = gamesVm;
        Title = "Games Management";
        await gamesVm.LoadGames();
    }

    [RelayCommand]
    private async Task NavigateToEvents()
    {
        var eventsVm = new EventsViewModel();
        CurrentView = eventsVm;
        Title = "Events Management";
        await eventsVm.LoadEvents();
    }
}

public partial class HomeViewModel : ViewModelBase
{
    [ObservableProperty]
    private string _welcomeMessage = "Welcome to Tournament Organizer!";
}