Program.cs

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

var builder = WebApplication.CreateBuilder(args);

// Adding DbContext for the database connection
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
if (string.IsNullOrEmpty(connectionString))
{
    throw new Exception("Connection string 'DefaultConnection' is not configured.");
}

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

// Adding Identity services for user and role management
builder.Services.AddIdentity<ApplicationUser, IdentityRole>(options => options.SignIn.RequireConfirmedAccount = false)
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();

// Configuring cookie settings for session management
builder.Services.ConfigureApplicationCookie(options =>
{
    options.ExpireTimeSpan = TimeSpan.FromHours(1);
    options.SlidingExpiration = true;
    options.LoginPath = "/Account/Login";
    options.LogoutPath = "/Account/Logout";
    options.AccessDeniedPath = "/Account/AccessDenied";
    options.Cookie.HttpOnly = true;
    options.Cookie.SameSite = Microsoft.AspNetCore.Http.SameSiteMode.Strict;
    options.Cookie.SecurePolicy = Microsoft.AspNetCore.Http.CookieSecurePolicy.Always;
});

// Adding authorization policies
builder.Services.AddAuthorization(options =>
{
    options.AddPolicy("AdminPolicy", policy =>
        policy.RequireRole("Admin"));
});

// Adding custom services like IUserService
builder.Services.AddScoped<IUserService, UserService>();
builder.Services.AddScoped<ITicketService, TicketService>();

// Adding controllers and views
builder.Services.AddControllersWithViews();
builder.Services.AddRazorPages(); // Optional: Adding Razor Pages support

var app = builder.Build();

// Initializing data with SeedData
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    try
    {
        await SeedData.Initialize(services);
    }
    catch (Exception ex)
    {
        var logger = services.GetRequiredService<ILogger<Program>>();
        logger.LogError(ex, "An error occurred while seeding the database. Ensure migrations are applied.");
    }
}

// Configuring HTTP request pipeline
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();

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

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

app.MapRazorPages(); // Optional: Map Razor Pages
app.MapFallbackToController("Index", "Home"); // Optional: Fallback route

app.Run();