func unstructuredToPod(obj *runtime.Unstructured) (*v1.Pod, error) {
	json, err := runtime.Encode(runtime.UnstructuredJSONScheme, obj)
	if err != nil {
		return nil, err
	}
	pod := new(v1.Pod)
	err = runtime.DecodeInto(testapi.Default.Codec(), json, pod)
	pod.Kind = ""
	pod.APIVersion = ""
	return pod, err
}

func getTestPod() *v1.Pod {
	container := v1.Container{
		Name: testContainerName,
	}
	pod := v1.Pod{
		Spec: v1.PodSpec{
			Containers:    []v1.Container{container},
			RestartPolicy: v1.RestartPolicyNever,
		},
	}
	pod.Name = "testPod"
	pod.UID = testPodUID
	return &pod
}

// ToAPIPod converts Pod to v1.Pod. Note that if a field in v1.Pod has no
// corresponding field in Pod, the field would not be populated.
func (p *Pod) ToAPIPod() *v1.Pod {
	var pod v1.Pod
	pod.UID = p.ID
	pod.Name = p.Name
	pod.Namespace = p.Namespace

	for _, c := range p.Containers {
		var container v1.Container
		container.Name = c.Name
		container.Image = c.Image
		pod.Spec.Containers = append(pod.Spec.Containers, container)
	}
	return &pod
}

// Sets the name of the profile to use with the container.
func SetProfileName(pod *v1.Pod, containerName, profileName string) error {
	if pod.Annotations == nil {
		pod.Annotations = map[string]string{}
	}
	pod.Annotations[ContainerAnnotationKeyPrefix+containerName] = profileName
	return nil
}

func addPodConditionReady(pod *v1.Pod) {
	pod.Status = v1.PodStatus{
		Phase: v1.PodRunning,
		Conditions: []v1.PodCondition{
			{
				Type:   v1.PodReady,
				Status: v1.ConditionTrue,
			},
		},
	}
}

// updateAnnotations returns an Annotation map containing the api annotation map plus
// locally managed annotations
func updateAnnotations(existing, ref *v1.Pod) {
	annotations := make(map[string]string, len(ref.Annotations)+len(localAnnotations))
	for k, v := range ref.Annotations {
		annotations[k] = v
	}
	for _, k := range localAnnotations {
		if v, ok := existing.Annotations[k]; ok {
			annotations[k] = v
		}
	}
	existing.Annotations = annotations
}

// TODO: remove this function when init containers becomes a stable feature
func SetInitContainersAnnotations(pod *v1.Pod) error {
	if len(pod.Spec.InitContainers) > 0 {
		value, err := json.Marshal(pod.Spec.InitContainers)
		if err != nil {
			return err
		}
		if pod.Annotations == nil {
			pod.Annotations = make(map[string]string)
		}
		pod.Annotations[v1.PodInitContainersAnnotationKey] = string(value)
		pod.Annotations[v1.PodInitContainersBetaAnnotationKey] = string(value)
	}
	return nil
}

// checkAndUpdatePod updates existing, and:
//   * if ref makes a meaningful change, returns needUpdate=true
//   * if ref makes a meaningful change, and this change is graceful deletion, returns needGracefulDelete=true
//   * if ref makes no meaningful change, but changes the pod status, returns needReconcile=true
//   * else return all false
//   Now, needUpdate, needGracefulDelete and needReconcile should never be both true
func checkAndUpdatePod(existing, ref *v1.Pod) (needUpdate, needReconcile, needGracefulDelete bool) {

	// 1. this is a reconcile
	// TODO: it would be better to update the whole object and only preserve certain things
	//       like the source annotation or the UID (to ensure safety)
	if !podsDifferSemantically(existing, ref) {
		// this is not an update
		// Only check reconcile when it is not an update, because if the pod is going to
		// be updated, an extra reconcile is unnecessary
		if !reflect.DeepEqual(existing.Status, ref.Status) {
			// Pod with changed pod status needs reconcile, because kubelet should
			// be the source of truth of pod status.
			existing.Status = ref.Status
			needReconcile = true
		}
		return
	}

	// Overwrite the first-seen time with the existing one. This is our own
	// internal annotation, there is no need to update.
	ref.Annotations[kubetypes.ConfigFirstSeenAnnotationKey] = existing.Annotations[kubetypes.ConfigFirstSeenAnnotationKey]

	existing.Spec = ref.Spec
	existing.Labels = ref.Labels
	existing.DeletionTimestamp = ref.DeletionTimestamp
	existing.DeletionGracePeriodSeconds = ref.DeletionGracePeriodSeconds
	existing.Status = ref.Status
	updateAnnotations(existing, ref)

	// 2. this is an graceful delete
	if ref.DeletionTimestamp != nil {
		needGracefulDelete = true
	} else {
		// 3. this is an update
		needUpdate = true
	}

	return
}

// same as above func comments, except 'recyclerClient' is a narrower pod API
// interface to ease testing
func internalRecycleVolumeByWatchingPodUntilCompletion(pvName string, pod *v1.Pod, recyclerClient recyclerClient) error {
	glog.V(5).Infof("creating recycler pod for volume %s\n", pod.Name)

	// Generate unique name for the recycler pod - we need to get "already
	// exists" error when a previous controller has already started recycling
	// the volume. Here we assume that pv.Name is already unique.
	pod.Name = "recycler-for-" + pvName
	pod.GenerateName = ""

	stopChannel := make(chan struct{})
	defer close(stopChannel)
	podCh, err := recyclerClient.WatchPod(pod.Name, pod.Namespace, stopChannel)
	if err != nil {
		glog.V(4).Infof("cannot start watcher for pod %s/%s: %v", pod.Namespace, pod.Name, err)
		return err
	}

	// Start the pod
	_, err = recyclerClient.CreatePod(pod)
	if err != nil {
		if errors.IsAlreadyExists(err) {
			glog.V(5).Infof("old recycler pod %q found for volume", pod.Name)
		} else {
			return fmt.Errorf("unexpected error creating recycler pod:  %+v\n", err)
		}
	}
	defer func(pod *v1.Pod) {
		glog.V(2).Infof("deleting recycler pod %s/%s", pod.Namespace, pod.Name)
		if err := recyclerClient.DeletePod(pod.Name, pod.Namespace); err != nil {
			glog.Errorf("failed to delete recycler pod %s/%s: %v", pod.Namespace, pod.Name, err)
		}
	}(pod)

	// Now only the old pod or the new pod run. Watch it until it finishes
	// and send all events on the pod to the PV
	for {
		event := <-podCh
		switch event.Object.(type) {
		case *v1.Pod:
			// POD changed
			pod := event.Object.(*v1.Pod)
			glog.V(4).Infof("recycler pod update received: %s %s/%s %s", event.Type, pod.Namespace, pod.Name, pod.Status.Phase)
			switch event.Type {
			case watch.Added, watch.Modified:
				if pod.Status.Phase == v1.PodSucceeded {
					// Recycle succeeded.
					return nil
				}
				if pod.Status.Phase == v1.PodFailed {
					if pod.Status.Message != "" {
						return fmt.Errorf(pod.Status.Message)
					} else {
						return fmt.Errorf("pod failed, pod.Status.Message unknown.")
					}
				}

			case watch.Deleted:
				return fmt.Errorf("recycler pod was deleted")

			case watch.Error:
				return fmt.Errorf("recycler pod watcher failed")
			}

		case *v1.Event:
			// Event received
			podEvent := event.Object.(*v1.Event)
			glog.V(4).Infof("recycler event received: %s %s/%s %s/%s %s", event.Type, podEvent.Namespace, podEvent.Name, podEvent.InvolvedObject.Namespace, podEvent.InvolvedObject.Name, podEvent.Message)
			if event.Type == watch.Added {
				recyclerClient.Event(podEvent.Type, podEvent.Message)
			}
		}
	}
}

// SetIdentity sets the pet namespace and name.
func (n *NameIdentityMapper) SetIdentity(id string, pet *v1.Pod) {
	pet.Name = fmt.Sprintf("%v-%v", n.ps.Name, id)
	pet.Namespace = n.ps.Namespace
	return
}

func TestSyncBatchNoDeadlock(t *testing.T) {
	client := &fake.Clientset{}
	m := newTestManager(client)
	pod := getTestPod()

	// Setup fake client.
	var ret v1.Pod
	var err error
	client.AddReactor("*", "pods", func(action core.Action) (bool, runtime.Object, error) {
		switch action := action.(type) {
		case core.GetAction:
			assert.Equal(t, pod.Name, action.GetName(), "Unexpeted GetAction: %+v", action)
		case core.UpdateAction:
			assert.Equal(t, pod.Name, action.GetObject().(*v1.Pod).Name, "Unexpeted UpdateAction: %+v", action)
		default:
			assert.Fail(t, "Unexpected Action: %+v", action)
		}
		return true, &ret, err
	})

	pod.Status.ContainerStatuses = []v1.ContainerStatus{{State: v1.ContainerState{Running: &v1.ContainerStateRunning{}}}}

	getAction := core.GetActionImpl{ActionImpl: core.ActionImpl{Verb: "get", Resource: schema.GroupVersionResource{Resource: "pods"}}}
	updateAction := core.UpdateActionImpl{ActionImpl: core.ActionImpl{Verb: "update", Resource: schema.GroupVersionResource{Resource: "pods"}, Subresource: "status"}}

	// Pod not found.
	ret = *pod
	err = errors.NewNotFound(api.Resource("pods"), pod.Name)
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction})
	client.ClearActions()

	// Pod was recreated.
	ret.UID = "other_pod"
	err = nil
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction})
	client.ClearActions()

	// Pod not deleted (success case).
	ret = *pod
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction, updateAction})
	client.ClearActions()

	// Pod is terminated, but still running.
	pod.DeletionTimestamp = new(metav1.Time)
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction, updateAction})
	client.ClearActions()

	// Pod is terminated successfully.
	pod.Status.ContainerStatuses[0].State.Running = nil
	pod.Status.ContainerStatuses[0].State.Terminated = &v1.ContainerStateTerminated{}
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction, updateAction})
	client.ClearActions()

	// Error case.
	err = fmt.Errorf("intentional test error")
	m.SetPodStatus(pod, getRandomPodStatus())
	m.testSyncBatch()
	verifyActions(t, client, []core.Action{getAction})
	client.ClearActions()
}