Program.cs

using CoffeeShop.Data;
using CoffeeShop.Services;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddEntityFrameworkStores<ApplicationDbContext>();

// Register services
builder.Services.AddScoped<ProductService>();
builder.Services.AddScoped<CartService>();

// Add session services
builder.Services.AddSession();

builder.Services.AddControllersWithViews();

// Add HttpContextAccessor for session handling in CartService
builder.Services.AddHttpContextAccessor();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.UseSession(); // Use session middleware
app.MapControllerRoute(
    name: "store",
    pattern: "Store/{controller=Store}/{action=Index}/{id?}");
app.MapControllerRoute(
    name: "store",
    pattern: "Admin/{controller=Products}/{action=Index}/{id?}");
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");
app.MapRazorPages();

app.Run();