// Update the cache with the given Netns. If there is already a Netns for the given uid, we return it, and close the one provided.
func (p *podNetnsCache) UpsertPodCacheWithNetns(uid string, workload WorkloadInfo) Netns {
	// lock current snapshot pod map
	p.mu.Lock()
	defer p.mu.Unlock()
	if existing := p.currentPodCache[uid]; existing.Netns != nil {
		if existing.Netns.Inode() == workload.Netns.Inode() {
			workload.Netns.Close()

		log.Warnf("failed to construct initial ztunnel snapshot: %v", err)
		consErr = append(consErr, err)
	}

	return errors.Join(consErr...)
}

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

	log.Info("CNI ambient server kubeclient started")
	pods := s.handlers.GetAmbientPods()
	err := s.dataplane.ConstructInitialSnapshot(pods)
	if err != nil {
		log.Warnf("failed to construct initial snapshot: %v", err)
	}

	log.Info("CNI ambient server marking ready")
	s.Ready()
	s.dataplane.Start(s.ctx)
	s.handlers.Start()
}

func (s *Server) Stop() {

	uid := fixture.uid
	// read initial pod add
	readRequest(t, ztunClient)
	sendAck(ztunClient)
	// read snapshot sent
	m, fds := readRequest(t, ztunClient)
	assert.Equal(t, len(fds), 0)
	sent := m.Payload.(*zdsapi.WorkloadRequest_SnapshotSent).SnapshotSent
	if sent == nil {
		panic("expected snapshot sent")
	}
	sendAck(ztunClient)

	// now remove the pod
	ztunnelServer := fixture.ztunServer

	m, _, err := readProto[zdsapi.ZdsHello](conn.u, readWriteDeadline, nil)
	if err != nil {
		return err
	}
	log.Infof("received hello from ztunnel. %v", m.Version)
	log.Debug("sending snapshot to ztunnel")
	if err := z.sendSnapshot(ctx, conn); err != nil {
		return err
	}
	for {
		// listen for updates:
		select {
		case update, ok := <-conn.Updates:
			if !ok {

	).Return(nil)

	fixture.ipsetDeps.On("addIP",
		"foo-v4",
		netip.MustParseAddr("2.2.2.2"),
		ipProto,
		podUID,
		true,
	).Return(nil)

	// List should return one IP not in our "pod snapshot", which means we prune
	fixture.ipsetDeps.On("listEntriesByIP",
		"foo-v4",
	).Return([]netip.Addr{
		netip.MustParseAddr("2.2.2.2"),
		netip.MustParseAddr("6.6.6.6"),
		netip.MustParseAddr("3.3.3.3"),

				return nil
			}

			log.Debugf("Pod %s now matches, adding to mesh", newPod.Name)
			// netns == ""; at this point netns should have been added via the initial snapshot,
			// or via the cni plugin. If it happens to get here before the cni plugin somehow,
			// then we will just fail to add the pod to the mesh, and it will be retried later when cni plugin adds it.

	// Snapshot charts are in testdata/manifest-generate/data-snapshot
	snapshotCharts = func() chartSourceType {
		d, err := os.MkdirTemp("", "data-snapshot-*")
		if err != nil {
			panic(fmt.Errorf("failed to make temp dir: %v", err))
		}
		f, err := os.Open("testdata/manifest-generate/data-snapshot.tar.gz")
		if err != nil {

		}
		installLog.Info("Detected changes to the node-level CNI setup, checking to see if configs or binaries need redeploying")
		// We don't support (or want) to silently (re)deploy any binaries that were not in the initial "snapshot"
		// so we intentionally discard/do not update the list of installedBins on redeploys.
		if _, err := in.installAll(ctx); err != nil {
			return err
		}

	startTime time.Time, endTime time.Time,
) ([]prometheus_model.LabelSet, promv1.Warnings, error) {
	return nil, nil, nil
}

func (client mockPromAPI) Snapshot(ctx context.Context, skipHead bool) (promv1.SnapshotResult, error) {
	return promv1.SnapshotResult{}, nil
}

func (client mockPromAPI) Rules(ctx context.Context) (promv1.RulesResult, error) {