var template = File.ReadAllText("Templates/InvoiceTemplate.html");
var compiled = Handlebars.Compile(template);
string html = compiled(data);

// Скачать Chromium
var fetcher = new BrowserFetcher();
await fetcher.DownloadAsync();

// Рендер в PDF
using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });
using var page = await browser.NewPageAsync();
await page.SetContentAsync(html);
byte[] pdf = await page.PdfDataAsync(new PdfOptions {
    Format = PaperFormat.A4,
    PrintBackground = true,
    MarginOptions = new MarginOptions { Top = "50px", Right = "20px", Bottom = "50px", Left = "20px" }
});

internal sealed class PermissionAuthorizationHandler 
    : AuthorizationHandler<PermissionRequirement>
{
    protected override Task HandleRequirementAsync(
        AuthorizationHandlerContext context,
        PermissionRequirement requirement)
    {
        HashSet<string> permissions = context.User.GetPermissions();

        if (permissions.Contains(requirement.Permission))
        {
            context.Succeed(requirement);
        }
        return Task.CompletedTask;
    }

// Бизнес-правило: активные клиенты с заказами за последние 30 дней
public sealed class ActiveCustomersSpec : Specification<Customer>
{
    public ActiveCustomersSpec(DateTime since)
    {
        Criteria = c => c.IsActive && c.Orders.Any(o => o.CreatedAt >= since);
        AddInclude(c => c.Orders);
    }
}

// Применение
var spec = new ActiveCustomersSpec(DateTime.UtcNow.AddDays(-30));
var customers = await db.Set<Customer>().Apply(spec).ToListAsync();

using System.Text;

var sb = new StringBuilder();
for (int i = 0; i < 1000; i++)
{
    sb.Append("строка ").Append(i).AppendLine();
}

string result = sb.ToString();
Console.WriteLine(result);

var builder = DistributedApplication.CreateBuilder(args);

builder.AddViteApp("vite-demo")
       .WithExternalHttpEndpoints();

builder.AddViteApp("yarn-demo", packageManager: "yarn")
       .WithExternalHttpEndpoints();

builder.AddViteApp("pnpm-demo", packageManager: "pnpm")
       .WithExternalHttpEndpoints();

builder.Build().Run();

static string PrintShape(object shape) =>
    shape switch
    {
        null => "Нет объекта",
        Circle c => $"Круг с радиусом {c.Radius}",
        Rectangle { Width: > 0, Height: > 0 } r => $"Прямоугольник {r.Width}x{r.Height}",
        _ => "Неизвестная фигура"
    };