var ruleProvider = new LocalFileRuleProvider("public_suffix_list.dat");
await ruleProvider.BuildAsync();

var domainParser = new DomainParser(ruleProvider);

var domainInfo = domainParser.Parse("sub.test.co.uk");
//domainInfo.Domain = "test";
//domainInfo.FullyQualifiedDomainName = "sub.test.co.uk";
//domainInfo.RegistrableDomain = "test.co.uk";
//domainInfo.Subdomain = "sub";
//domainInfo.TopLevelDomain = "co.uk";

var ruleProvider = new LocalFileRuleProvider("public_suffix_list.dat");
await ruleProvider.BuildAsync();

var domainParser = new DomainParser(ruleProvider);

var isValid = domainParser.IsValidDomain("sub.test.co.uk");

// after -> var builder = WebApplication.CreateBuilder(args);

builder.Services.AddHttpClient(); //Required for CachedHttpRuleProvider
builder.Services.AddSingleton<ICacheProvider, LocalFileSystemCacheProvider>();
builder.Services.AddSingleton<IRuleProvider, CachedHttpRuleProvider>();
builder.Services.AddSingleton<IDomainParser, DomainParser>();

// after -> var app = builder.Build();
var ruleProvider = app.Services.GetService<IRuleProvider>();
if (ruleProvider != null)
{
    await ruleProvider.BuildAsync();
}

// minimal api
app.MapGet("/DomainInfo/{domain}", (string domain, IDomainParser domainParser) =>
{
    domain = HttpUtility.UrlEncode(domain);

    var domainInfo = domainParser.Parse(domain);
    return domainInfo;
})
.WithName("DomainInfo")
.WithOpenApi();

var httpClient = new HttpClient();
var cacheProvider = new Nager.PublicSuffix.RuleProviders.CacheProviders.LocalFileSystemCacheProvider();
var ruleProvider = new CachedHttpRuleProvider(cacheProvider, httpClient);

await ruleProvider.BuildAsync();

var domainParser = new DomainParser(ruleProvider);
var domainInfo = domainParser.Parse("example.com");