)

const (
	// HTTPListener identifies a listener as being of HTTP type by the presence of an HTTP connection manager filter
	HTTPListener = wellknown.HTTPConnectionManager

	// TCPListener identifies a listener as being of TCP type by the presence of TCP proxy filter
	TCPListener = wellknown.TCPProxy

	IPMatcher = "type.googleapis.com/xds.type.matcher.v3.IPMatcher"
)

	// Get the pods with limit = 500.
	kubeClientGetPodLimit = 500
)

type ControlPlaneNotFoundError struct {
	Namespace string
}

func (c ControlPlaneNotFoundError) Error() string {
	return fmt.Sprintf("no running Istio pods in %q", c.Namespace)
}

var _ error = ControlPlaneNotFoundError{}

type Options struct {
	// MessageWriter is a writer for displaying messages to users.
	MessageWriter io.Writer

	includeOutboundPorts string
	kubevirtInterfaces   string
	excludeInterfaces    string
	dnsRedirect          bool
	dualStack            bool
	invalidDrop          bool
}

type annotationValidationFunc func(value string) error

type annotationParam struct {
	key        string
	defaultVal string
	validator  annotationValidationFunc
}

func alwaysValidFunc(value string) error {
	return nil
}

	opts ...client.PatchOption,
) error {
	// Apply patches are supposed to upsert, but fake client fails if the object doesn't exist,
	// if an apply patch occurs for an object that doesn't yet exist, create it.
	if patch.Type() != types.ApplyPatchType {
		return clnt.Patch(ctx, obj, patch, opts...)
	}
	check, ok := obj.DeepCopyObject().(client.Object)
	if !ok {
		return errors.New("could not check for object in fake client")
	}

	"istio.io/istio/cni/pkg/config"
	"istio.io/istio/cni/pkg/util"
	"istio.io/istio/pkg/file"
)

type pluginConfig struct {
	mountedCNINetDir string
	cniConfName      string
	chainedCNIPlugin bool
}

type cniConfigTemplate struct {
	cniNetworkConfigFile string
	cniNetworkConfig     string
}

type cniConfigVars struct {
	cniNetDir          string
	kubeconfigFilename string
	logLevel           string

}

func (s *NetServer) buildZtunnelSnapshot(ambientPodUIDs map[types.UID]*corev1.Pod) error {
	// first add all the pods as empty:
	for uid := range ambientPodUIDs {
		s.currentPodSnapshot.Ensure(string(uid))
	}

	// populate full pod snapshot from cgroups
	return s.scanProcForPodsAndCache(ambientPodUIDs)
}

func (s *NetServer) scanProcForPodsAndCache(pods map[types.UID]*corev1.Pod) error {

		constants.DataplaneModeLabel, constants.DataplaneModeAmbient))
	_, err := client.Kube().CoreV1().Namespaces().Patch(ctx, ns.Name,
		types.MergePatchType, labelsPatch, metav1.PatchOptions{})
	assert.NoError(t, err)

	// wait until at least one add event happens
	mt.Assert(EventTotals.Name(), map[string]string{"type": "add"}, monitortest.AtLeast(1))

	assertPodNotAnnotated(t, client, pod)

	// Assert expected calls (not) actually made

spec:
  metadata:
    annotations:
      annotation: foobar
    labels:
      app: foo
      bar: baz
  template:
    ports:
      grpc: 3550
      http: 8080
    serviceAccount: test
`
)

type testcase struct {
	description       string
	expectedException bool
	args              []string
	expectedOutput    string
	namespace         string
}

func TestWorkloadGroupCreate(t *testing.T) {

	}
	log.Debug("accepted conn")
	return newZtunnelConnection(conn), nil
}

type updateResponse struct {
	err  error
	resp *zdsapi.WorkloadResponse
}

type updateRequest struct {
	Update []byte
	Fd     *int

	Resp chan updateResponse
}

type ZtunnelConnection struct {
	u       *net.UnixConn
	Updates chan updateRequest
}

	invalidVersion       = "0.1.0"
	preVersion           = "0.2.0"
)

var mockConfTmpl = `{
    "cniVersion": "%s",
	"name": "istio-plugin-sample-test",
	"type": "sample",
    "capabilities": {
        "testCapability": false
    },
    "ipam": {
        "type": "testIPAM"
    },
    "dns": {
        "nameservers": ["testNameServer"],
        "domain": "testDomain",
        "search": ["testSearch"],