import org.apache.maven.api.annotations.Nonnull;

/**
 * Transport for specified remote repository (using provided remote repository base URI as root). Must be treated as a
 * resource, best in try-with-resource block.
 *
 * @since 4.0.0
 */
@Experimental
@Consumer
public interface Transport extends Closeable {
    /**

		return tr
	}
}

// uaTransport - User-Agent  transport
type uaTransport struct {
	ua string
	rt http.RoundTripper
}

func (u *uaTransport) RoundTrip(req *http.Request) (*http.Response, error) {
	req2 := req.Clone(req.Context())
	req2.Header.Set("User-Agent", u.ua)
	return u.rt.RoundTrip(req2)
}

// WithUserAgent wraps an existing transport with custom User-Agent

 * <p>
 * This implementation is backed by Maven Resolver API, supported protocols and transport selection depends on it. If
 * resolver preference regarding transport is altered, it will affect this service as well.
 *
 * @since 4.0.0
 */
@Experimental
@Consumer
public interface TransportProvider extends Service {
    /**
     * Provides new {@link Transport} instance for given {@link RemoteRepository}, if possible.
     *

	cfg.Proxy = proxy

	if transport == nil {
		// when transport is nil, it means we are just validating the
		// inputs not performing any network calls.
		return cfg, nil
	}

	// Make sure to clone the transport before editing the ProxyURL
	if proxyURL != nil {
		if tr, ok := transport.(*http.Transport); ok {
			ctransport := tr.Clone()
			ctransport.Proxy = http.ProxyURL((*url.URL)(proxyURL))

	target.httpClient = &http.Client{Transport: transport}

	yes, err := target.isActive()
	if err != nil {
		return err
	}
	if !yes {
		return errNotConnected
	}

	return nil
}

// NewWebhookTarget - creates new Webhook target.
func NewWebhookTarget(ctx context.Context, id string, args WebhookArgs, loggerOnce logger.LogOnce, transport *http.Transport) (*WebhookTarget, error) {
	ctx, cancel := context.WithCancel(ctx)

        } else if (MAVEN_RESOLVER_TRANSPORT_APACHE.equals(transport)
                || MAVEN_RESOLVER_TRANSPORT_NATIVE.equals(transport)) {
            if (MAVEN_RESOLVER_TRANSPORT_NATIVE.equals(transport)) {
                logger.warn(
                        "Transport name '{}' is DEPRECATED/RENAMED, use '{}' instead",
                        MAVEN_RESOLVER_TRANSPORT_NATIVE,

	target.httpClient = &http.Client{Transport: transport}

	yes, err := target.isActive()
	if err != nil {
		return err
	}
	if !yes {
		return store.ErrNotConnected
	}

	return nil
}

// NewWebhookTarget - creates new Webhook target.
func NewWebhookTarget(ctx context.Context, id string, args WebhookArgs, loggerOnce logger.LogOnce, transport *http.Transport) (*WebhookTarget, error) {

	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	if a.AuthToken != "" {
		req.Header.Set("Authorization", a.AuthToken)
	}

	client := &http.Client{Transport: a.Transport}
	resp, err := client.Do(req)
	if err != nil {
		return err
	}
	defer a.CloseRespFn(resp.Body)

	return nil
}

// UnmarshalJSON - decodes JSON data.

        assertEquals(
                "Unknown resolver transport 'illegal'. Supported transports are: wagon, apache, jdk, auto",
                exception.getMessage());
        properties.remove("maven.resolver.transport");
    }

    @Test
    void versionFilteringTest() throws InvalidRepositoryException {

}

// Option is a function type that accepts a pointer Target
type Option func(*KeycloakProvider)

// WithTransport provide custom transport
func WithTransport(transport http.RoundTripper) Option {
	return func(p *KeycloakProvider) {
		p.client = http.Client{
			Transport: transport,
		}
	}
}

// WithOpenIDConfig provide OpenID Endpoint configuration discovery document