"regexp"
	"strings"
	"unicode"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/types"

	"istio.io/istio/pkg/maps"
	"istio.io/istio/pkg/util/sets"
)

type PodToNetns map[string]WorkloadInfo

func (p PodToNetns) Close() {
	for _, wl := range p {
		wl.Netns.Close()
	}
}

type PodNetnsFinder interface {
	FindNetnsForPods(filter map[types.UID]*corev1.Pod) (PodToNetns, error)
}

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cli

import (
	"fmt"

	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/rest"
	"k8s.io/client-go/tools/clientcmd"

	"istio.io/istio/istioctl/pkg/util/handlers"
	"istio.io/istio/pkg/cluster"

	}
	if nsObj.Labels == nil {
		return false, nil
	}
	return nsObj.Labels[label] == labelValue, nil
}

func getNamespace(kubeClient kube.CLIClient, ns string) (*corev1.Namespace, error) {
	nsObj, err := kubeClient.Kube().CoreV1().Namespaces().Get(context.Background(), ns, metav1.GetOptions{})
	if kerrors.IsNotFound(err) {
		return nil, fmt.Errorf("namespace: %s not found", ns)
	} else if err != nil {

// TODO: Make the following accurate when using the Kubernetes certificate signer
func createCertsTokens(kubeClient kube.CLIClient, wg *clientnetworking.WorkloadGroup, dir string, out io.Writer) error {
	rootCert, err := kubeClient.Kube().CoreV1().ConfigMaps(wg.Namespace).Get(context.Background(), controller.CACertNamespaceConfigMap, metav1.GetOptions{})
	// errors if the requested configmap does not exist in the given namespace
	if err != nil {

	return kubernetes.NewForConfig(config)
}

// getK8sPodInfo returns information of a POD
func getK8sPodInfo(client kubernetes.Interface, podName, podNamespace string) (*PodInfo, error) {
	pod, err := client.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
	if err != nil {
		return nil, err
	}

	pi := ExtractPodInfo(pod)
	log.Debugf("Pod %v/%v info: \n%+v", podNamespace, podName, pi)

}

// GetNamespacesWithTag retrieves all namespaces pointed at the given tag.
func GetNamespacesWithTag(ctx context.Context, client kubernetes.Interface, tag string) ([]string, error) {
	namespaces, err := client.CoreV1().Namespaces().List(ctx, metav1.ListOptions{
		LabelSelector: fmt.Sprintf("%s=%s", label.IoIstioRev.Name, tag),
	})
	if err != nil {
		return nil, err
	}

	nsNames := make([]string, len(namespaces.Items))

	return nil
}

func isAmbientPod(client kubernetes.Interface, podName, podNamespace string) (bool, error) {
	pod, err := client.CoreV1().Pods(podNamespace).Get(context.Background(), podName, metav1.GetOptions{})
	if err != nil {
		return false, err
	}
	ns, err := client.CoreV1().Namespaces().Get(context.Background(), podNamespace, metav1.GetOptions{})
	if err != nil {
		return false, err
	}

package ztunnelconfig

import (
	"context"
	"fmt"
	"io"
	"os"
	"regexp"
	"sort"
	"strings"

	"github.com/hashicorp/go-multierror"
	"github.com/spf13/cobra"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/kubectl/pkg/util/podutils"

	"istio.io/istio/istioctl/pkg/cli"
	"istio.io/istio/istioctl/pkg/completion"

				selectedNamespace = ctx.NamespaceOrDefault(selectedNamespace)
				if selectedNamespace != "" {
					client, err := ctx.CLIClient()
					if err != nil {
						return err
					}
					_, err = client.Kube().CoreV1().Namespaces().Get(context.TODO(), selectedNamespace, metav1.GetOptions{})
					if errors.IsNotFound(err) {
						fmt.Fprintf(cmd.ErrOrStderr(), "namespace %q not found\n", ctx.Namespace())
						return nil

	// In 1.22, we remove the default tracing config which points to zipkin.istio-system
	// This has no effect for users, unless they have this service.
	svc, err := cli.Kube().CoreV1().Services("istio-system").Get(context.Background(), "zipkin", metav1.GetOptions{})
	if err != nil && !kerrors.IsNotFound(err) {
		return err
	}
	if err != nil {
		// not found
		return nil
	}
	// found