Program.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using MovieProject.Data;
using MovieProject.Models;

var builder = WebApplication.CreateBuilder(args);

// We tell the system where to store the language files (Resources)
builder.Services.AddLocalization(options => options.ResourcesPath = "Resources");

// We are integrating multilingual support (for Views and DataAnnotations) into the MVC architecture
builder.Services.AddControllersWithViews()
    .AddViewLocalization()
    .AddDataAnnotationsLocalization(options => {
        options.DataAnnotationLocalizerProvider = (type, factory) =>
            factory.Create(typeof(MovieProject.SharedResource));
    });


//--DATABASE CONNECTION (PostgreSQL)--
//We locate and retrieve the encrypted address named "DefaultConnection" from the appsettings.json file.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");

//We're adding our AppDbContext bridge to the system so it uses PostgreSQL
builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseNpgsql(connectionString));


//--IDENTITY AND MEMBERSHIP SYSTEM--
builder.Services.AddIdentity<AppUser, IdentityRole>(options =>
{
    // PASSWORD RULES
    options.Password.RequireDigit = true;               // The password must contain at least 1 digit (0-9)
    options.Password.RequiredLength = 8;                // The password must be at least 8 characters long
    options.Password.RequireUppercase = true;           // At least 1 uppercase letter is required
    options.Password.RequireLowercase = true;           // At least 1 lowercase letter is required
    options.Password.RequireNonAlphanumeric = false;    // Special characters (@, #, !) should not be required

    // USER/EMAIL RULES
    options.User.RequireUniqueEmail = true; // Prevent users from registering twice with the same email address
    options.User.AllowedUserNameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._@+"; // Valid characters in a username
})
.AddEntityFrameworkStores<AppDbContext>()
.AddDefaultTokenProviders();



var app = builder.Build();


//Seed Data
//Every time the application runs, it opens a temporary scope and performs a seeding check
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    await SeedData.Initialize(services);
}


//--HTTP REQUEST LINE--
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();       //It allows css, js and image files in the wwwroot folder to be accessible externally

// Languages supported by the site: Turkish and English
var supportedCultures = new[] { "en-US", "tr-TR" };
var localizationOptions = new RequestLocalizationOptions()
    .SetDefaultCulture(supportedCultures[0]) // The site's default language is Turkish
    .AddSupportedCultures(supportedCultures)
    .AddSupportedUICultures(supportedCultures);

app.UseRequestLocalization(localizationOptions);
app.UseRouting();

//ID VERIFICATION (Is the user logged in?)
app.UseAuthentication();

//AUTHORIZATION (Does the user have permission/role to access this page?)
app.UseAuthorization();

//We are setting the URL path for the site's default home page (Home/Index)
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}"
);

app.Run();