Program.cs

using Microsoft.EntityFrameworkCore;
using VibeLang.Models;
using Microsoft.AspNetCore.Identity;
using VibeLang.Repositories;
using VibeLang.Services;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();

// Configure routing to use lowercase URLs
builder.Services.AddRouting(options =>
{
    options.LowercaseUrls = true;
    options.LowercaseQueryStrings = true;
});

// Register DbContext with PostgreSQL
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<VibeLangDbContext>(options =>
    options.UseNpgsql(connectionString, o => o.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery)));

// Configure Identity
builder.Services.AddDefaultIdentity<ApplicationUser>(options => {
    options.SignIn.RequireConfirmedAccount = false;
    options.Password.RequireDigit = false;
    options.Password.RequireLowercase = false;
    options.Password.RequireUppercase = false;
    options.Password.RequireNonAlphanumeric = false;
    options.Password.RequiredLength = 6;
})
.AddEntityFrameworkStores<VibeLangDbContext>();

// Register Repositories
builder.Services.AddScoped(typeof(IRepository<>), typeof(Repository<>));
builder.Services.AddScoped<ICourseRepository, CourseRepository>();
builder.Services.AddScoped<IChapterRepository, ChapterRepository>();
builder.Services.AddScoped<ILessonRepository, LessonRepository>();

// Register Services
builder.Services.AddScoped<ICourseService, CourseService>();
builder.Services.AddScoped<IChapterService, ChapterService>();
builder.Services.AddScoped<ILessonService, LessonService>();

var app = builder.Build();

// Seed Database
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    try
    {
        var context = services.GetRequiredService<VibeLangDbContext>();
        await VibeLang.Data.DbInitializer.Initialize(context);
    }
    catch (Exception ex)
    {
        var logger = services.GetRequiredService<ILogger<Program>>();
        logger.LogError(ex, "An error occurred while seeding the database.");
    }
}

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    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.UseRouting();

app.UseAuthentication(); // Added
app.UseAuthorization();

app.MapStaticAssets();
app.MapRazorPages(); // Added for Identity UI

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


app.Run();