Program.cs

using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.EntityFrameworkCore;
using Nexus.Data;
using Nexus.Hubs;
using Nexus.Interfaces;
using Nexus.Repositories;
using Nexus.Services;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();
builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));

builder.Services.AddSignalR();
builder.Services.AddHttpContextAccessor();
builder.Services.AddScoped<ISystemUser, SystemUser>();
builder.Services.AddScoped<HuggingFaceService>();
builder.Services.AddScoped<IUserRepository, UserRepository>();
builder.Services.AddSingleton<IPasswordService, PasswordService>();
builder.Services.AddScoped<IFriendsRepository, FriendsRepository>();

builder.Services.AddAuthentication(options =>
{
    options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = CookieAuthenticationDefaults.AuthenticationScheme;
})
.AddCookie(options =>
{
    options.Cookie.SameSite = SameSiteMode.Strict;
    options.ExpireTimeSpan = TimeSpan.FromDays(1);
    options.Events.OnRedirectToLogin = context =>
    {
        context.Response.StatusCode = 401;
        return Task.CompletedTask;
    };
});

var app = builder.Build();

app.UseRouting(); 
app.UseAuthentication();  
app.UseAuthorization();  

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers(); 
});

app.UseStaticFiles();
app.UseSpa(spa =>
{
    spa.Options.SourcePath = "ClientApp";

    if (app.Environment.IsDevelopment())
    {
        spa.UseProxyToSpaDevelopmentServer("http://localhost:5173/");
    }
});
app.MapHub<NotificationsHub>("/hubs/notifications").RequireAuthorization();
app.MapHub<OnlineUsersHub>("/hubs/onlineUsers").RequireAuthorization();
app.MapHub<MessageHub>("/hubs/messages").RequireAuthorization();



app.Run();