CouchLog/WatchLog/Program.cs

using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using WatchLog.Components;
using WatchLog.Components.Account;
using WatchLog.Data;

var builder = WebApplication.CreateBuilder(args);

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

builder.Services.AddCascadingAuthenticationState();
builder.Services.AddScoped<IdentityUserAccessor>();
builder.Services.AddScoped<IdentityRedirectManager>();
builder.Services.AddScoped<AuthenticationStateProvider, IdentityRevalidatingAuthenticationStateProvider>();

builder.Services.AddAuthentication(options =>
    {
        options.DefaultScheme = IdentityConstants.ApplicationScheme;
        options.DefaultSignInScheme = IdentityConstants.ExternalScheme;
    })
    .AddIdentityCookies();

var connectionString = builder.Configuration.GetConnectionString("WatchLogDB") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlite(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddIdentityCore<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddRoles<IdentityRole>() // <-- Das ist der wichtige Zusatz
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddSignInManager()
    .AddDefaultTokenProviders();

builder.Services.AddSingleton<IEmailSender<ApplicationUser>, IdentityNoOpEmailSender>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Error", createScopeForErrors: true);
    // 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.UseAntiforgery();

app.MapStaticAssets();
app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

// Add additional endpoints required by the Identity /Account Razor components.
app.MapAdditionalIdentityEndpoints();

using (var scope = app.Services.CreateScope())
{
    var roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<IdentityRole>>();
    var userManager = scope.ServiceProvider.GetRequiredService<UserManager<ApplicationUser>>(); // UserManager hinzufügen

    string[] roleNames = { "Admin", "User" };
    IdentityResult roleResult;

    foreach (var roleName in roleNames)
    {
        var roleExist = await roleManager.RoleExistsAsync(roleName);
        if (!roleExist)
        {
            roleResult = await roleManager.CreateAsync(new IdentityRole(roleName));
        }
    }

    // --- HIER BEGINNT DER NEUE TEIL ---
    // Erstellt den Admin-Benutzer und weist ihm die Admin-Rolle zu.
    // WICHTIG: Ändere hier die E-Mail-Adresse und das Passwort!
    var adminEmail = "admin@deine-app.de";
    var adminPassword = "EinSehrSicheresPasswort123!"; // Nur für lokale Entwicklung, besser aus Konfiguration laden
    var normalUserEmail = "user@deine-app.de";

    // Sucht nach dem Benutzer anhand der E-Mail.
    var adminUser = await userManager.FindByEmailAsync(adminEmail);
    var normalUser = await userManager.FindByEmailAsync(normalUserEmail);

    // Wenn der Admin-Benutzer NICHT existiert, erstellen wir ihn.
    if (adminUser == null)
    {
        adminUser = new ApplicationUser
        {
            UserName = adminEmail,
            Email = adminEmail,
            EmailConfirmed = true // Wichtig, damit er sich direkt einloggen kann
        };
        // Erstellt den Benutzer mit dem definierten Passwort.
        var createResult = await userManager.CreateAsync(adminUser, adminPassword);
        
        // Wenn die Erstellung erfolgreich war, weisen wir die Admin-Rolle zu.
        if (createResult.Succeeded)
        {
            await userManager.AddToRoleAsync(adminUser, "Admin");
        }
    }
    else if (normalUser == null)
    {
        normalUser = new ApplicationUser
        {
            UserName = normalUserEmail,
            Email = normalUserEmail,
            EmailConfirmed = true
        };
        var createResult = await userManager.CreateAsync(normalUser, adminPassword);

        if (createResult.Succeeded)
        {
            await userManager.AddToRoleAsync(adminUser, "User");
        }
    }
    else if (!await userManager.IsInRoleAsync(normalUser, "User"))
    {
        await userManager.AddToRoleAsync(normalUser, "User");
    }
    // Optional: Wenn der Benutzer bereits existiert, aber kein Admin ist.
    else if (!await userManager.IsInRoleAsync(adminUser, "Admin"))
    {
        await userManager.AddToRoleAsync(adminUser, "Admin");
    }
}

app.Run();