Program.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using SmartBarcodePOS_Pro.Data;
using SmartBarcodePOS_Pro.Models;
using SmartBarcodePOS_Pro.Services;
using SmartBarcodePOS_Pro.Middleware;
using SmartBarcodePOS_Pro.Filters;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllersWithViews(options =>
{
    options.Filters.Add<LogExceptionFilter>();
});

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

builder.Services.AddIdentity<ApplicationUser, IdentityRole>(options =>
{
    options.Password.RequireDigit = true;
    options.Password.RequiredLength = 6;
    options.Password.RequireUppercase = true;
    options.Password.RequireLowercase = true;
    options.Password.RequireNonAlphanumeric = true;
})
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();

builder.Services.ConfigureApplicationCookie(options =>
{
    options.LoginPath = "/Account/Login";
    options.LogoutPath = "/Account/Logout";
    options.AccessDeniedPath = "/Account/Login";
    options.Events.OnRedirectToAccessDenied = async context =>
    {
        var user = context.HttpContext.User;
        if (user.IsInRole("Cashier"))
        {
            context.Response.Redirect("/CashierPortal/Index");
        }
        else
        {
            context.Response.Redirect("/Account/Login");
        }
        await System.Threading.Tasks.Task.CompletedTask;
    };
});

builder.Services.AddScoped<IBarcodeService, BarcodeService>();
builder.Services.AddScoped<IProductService, ProductService>();
builder.Services.AddScoped<ICategoryService, CategoryService>();
builder.Services.AddScoped<IBillingService, BillingService>();
builder.Services.AddScoped<IErrorLogService, ErrorLogService>();
builder.Services.AddScoped<IUserManagementService, UserManagementService>();
builder.Services.AddScoped<ISettingService, SettingService>();
builder.Services.AddScoped<IReportService, ReportService>();
builder.Services.Configure<SmtpSettings>(builder.Configuration.GetSection("SmtpSettings"));
builder.Services.AddScoped<IEmailService, SmtpEmailService>();

var app = builder.Build();

if (!Directory.Exists(Path.Combine(app.Environment.WebRootPath, "barcodes")))
    Directory.CreateDirectory(Path.Combine(app.Environment.WebRootPath, "barcodes"));

using (var scope = app.Services.CreateScope())
{
    await DbSeeder.SeedAsync(scope.ServiceProvider);
}

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Dashboard/Error");
    app.UseHsts();
}

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

app.UseRouting();
app.UseMiddleware<ErrorLoggingMiddleware>();
app.UseAuthentication();
app.UseAuthorization();

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

app.Run();