Program.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Identity;
using Final_Efstathiadis_Theodors.Data;
using Final_Efstathiadis_Theodors.Models;
using Final_Efstathiadis_Theodors.Services;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("CoreDeckDB") 
    ?? builder.Configuration.GetConnectionString("DefaultConnection");

builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));

builder.Services.AddIdentity<ApplicationUser, IdentityRole>(options =>
{
    options.SignIn.RequireConfirmedAccount = false;
    options.Password.RequireDigit = true;
    options.Password.RequireLowercase = true;
    options.Password.RequireUppercase = true;
    options.Password.RequireNonAlphanumeric = false;
    options.Password.RequiredLength = 8;
})
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();

builder.Services.ConfigureApplicationCookie(options =>
{
    options.LoginPath = "/Account/Login";
    options.LogoutPath = "/Account/Logout";
    options.AccessDeniedPath = "/Account/AccessDenied";
});

builder.Services.AddScoped<ICartService, CartService>();
builder.Services.AddScoped<IOrderService, OrderService>();

builder.Services.AddDistributedMemoryCache();
builder.Services.AddSession(options =>
{
    options.IdleTimeout = TimeSpan.FromMinutes(60);
    options.Cookie.HttpOnly = true;
    options.Cookie.IsEssential = true;
});

builder.Services.AddControllersWithViews();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    app.UseHsts();
}

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

app.UseSession();
app.UseAuthentication();
app.UseAuthorization();

app.MapStaticAssets();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}")
    .WithStaticAssets();

// Migrate and seed the database
using (var scope = app.Services.CreateScope())
{
    var serviceProvider = scope.ServiceProvider;
    try
    {
        var context = serviceProvider.GetRequiredService<ApplicationDbContext>();
        await context.Database.MigrateAsync();
        await DatabaseInitializerService.InitializeAsync(serviceProvider);
    }
    catch (Exception ex)
    {
        var logger = serviceProvider.GetRequiredService<ILogger<Program>>();
        logger.LogError(ex, "An error occurred while migrating or seeding the database.");
    }
}

app.Run();