type StatsClient struct {
	client winNodeStatsClient
}

type winNodeStatsClient interface {
	startMonitoring() error
	getNodeMetrics() (nodeMetrics, error)
	getNodeInfo() nodeInfo
	getMachineInfo() (*cadvisorapi.MachineInfo, error)
	getVersionInfo() (*cadvisorapi.VersionInfo, error)
}

type nodeMetrics struct {
	cpuUsageCoreNanoSeconds   uint64
	cpuUsageNanoCores         uint64

		cpuUsageNanoCores:         23,
		memoryPrivWorkingSetBytes: 1234,
		memoryCommittedBytes:      12345,
		timeStamp:                 timeStamp,
	}, nil
}

func (f fakeWinNodeStatsClient) getNodeInfo() nodeInfo {
	return nodeInfo{
		kernelVersion:               "v42",
		memoryPhysicalCapacityBytes: 1.6e+10,
	}
}
func (f fakeWinNodeStatsClient) getMachineInfo() (*cadvisorapi.MachineInfo, error) {

func GetClusterContext(runner *kubectlcmd.Runner, kubeConfig string) (string, error) {
	return runner.RunCmd("config current-context", "", kubeConfig, "", false)
}

// GetNodeInfo returns node information.
func GetNodeInfo(p *Params) (map[string]string, error) {
	out, err := p.Runner.RunCmd("get nodes -o yaml", "", p.KubeConfig, p.KubeContext, p.DryRun)
	return map[string]string{
		"nodes": out,
	}, err
}

	counterClient, err := NewPerfCounterClient()
	assert.NoError(t, err)

	// assert that startMonitoring has been called. nodeInfo should be set.
	assert.NotNil(t, counterClient.(*StatsClient).client.getNodeInfo())

	// Wait until we get a non-zero node metrics.
	if pollErr := wait.Poll(100*time.Millisecond, 5*perfCounterUpdatePeriod, func() (bool, error) {
		metrics, _ := counterClient.(*StatsClient).client.getNodeMetrics()

	}, nil
}

func (p *perfCounterNodeStatsClient) getNodeMetrics() (nodeMetrics, error) {
	p.mu.RLock()
	defer p.mu.RUnlock()
	return p.nodeMetrics, nil
}

func (p *perfCounterNodeStatsClient) getNodeInfo() nodeInfo {
	return p.nodeInfo
}

func (p *perfCounterNodeStatsClient) collectMetricsData(cpuCounter, memWorkingSetCounter, memCommittedBytesCounter perfCounter, networkAdapterCounter *networkCounter) {

		return errors.New("still assumed")
	}
	if _, err := c.GetPod(p); err == nil {
		return errors.New("still in cache")
	}
	return nil
}

// getNodeInfo returns cached data for the node name.
func (cache *cacheImpl) getNodeInfo(nodeName string) (*v1.Node, error) {
	cache.mu.RLock()
	defer cache.mu.RUnlock()

	n, ok := cache.nodes[nodeName]
	if !ok {

	getFromCluster(content.GetEvents, params, clusterDir, &mandatoryWg)
	getFromCluster(content.GetClusterInfo, params, clusterDir, &mandatoryWg)
	getFromCluster(content.GetNodeInfo, params, clusterDir, &mandatoryWg)
	getFromCluster(content.GetSecrets, params.SetVerbose(config.FullSecrets), clusterDir, &mandatoryWg)