// HostStatsProvider defines an interface for providing host stats associated with pod.
type HostStatsProvider interface {
	// getPodLogStats gets stats associated with pod log usage
	getPodLogStats(podNamespace, podName string, podUID types.UID, rootFsInfo *cadvisorapiv2.FsInfo) (*statsapi.FsStats, error)
	// getPodContainerLogStats gets stats associated with container log usage

	f.nchunk = 0
	f.nalloc = uint32(_FixAllocChunk / size * size) // Round _FixAllocChunk down to an exact multiple of size to eliminate tail waste
	f.inuse = 0
	f.stat = stat
	f.zero = true
}

func (f *fixalloc) alloc() unsafe.Pointer {
	if f.size == 0 {
		print("runtime: use of FixAlloc_Alloc before FixAlloc_Init\n")
		throw("runtime: internal error")
	}

	if f.list != nil {
		v := unsafe.Pointer(f.list)
		f.list = f.list.next

	statsapi "k8s.io/kubelet/pkg/apis/stats/v1alpha1"
	evictionapi "k8s.io/kubernetes/pkg/kubelet/eviction/api"
)

// fsStatsType defines the types of filesystem stats to collect.
type fsStatsType string

const (
	// fsStatsLocalVolumeSource identifies stats for pod local volume sources.
	fsStatsLocalVolumeSource fsStatsType = "localVolumeSource"
	// fsStatsLogs identifies stats for pod logs.
	fsStatsLogs fsStatsType = "logs"

	defer list.statLock.Unlock()

	stats, ok := list.targetStats[id]
	if !ok {
		// should not happen
		return
	}

	stats.currentSendCalls--
	list.targetStats[id] = stats
	return
}

func (list *TargetList) incFailedEvents(id TargetID) {
	list.statLock.Lock()
	defer list.statLock.Unlock()

	stats, ok := list.targetStats[id]
	if !ok {
		stats = targetStat{}
	}

	Used       uint64
	Files      uint64
	Ffree      uint64
	FSType     string
	Major      uint32
	Minor      uint32
	Name       string
	Rotational *bool
	NRRequests uint64
}

// IOStats contains stats of a single drive
type IOStats struct {
	ReadIOs        uint64
	ReadMerges     uint64
	ReadSectors    uint64
	ReadTicks      uint64
	WriteIOs       uint64
	WriteMerges    uint64
	WriteSectors   uint64

//
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
func GetInfo(path string, _ bool) (info Info, err error) {
	// Stat to know if the path exists.
	if _, err = os.Stat(path); err != nil {
		return Info{}, err
	}

	lpFreeBytesAvailable := int64(0)
	lpTotalNumberOfBytes := int64(0)
	lpTotalNumberOfFreeBytes := int64(0)

	// Extract values safely

	driveRealtimeMetrics := collectLocalMetrics(types, collectMetricsOpts{
		hosts: map[string]struct{}{
			globalLocalNodeName: {},
		},
	})

	stats := map[string]madmin.DiskIOStats{}
	for d, m := range driveRealtimeMetrics.ByDisk {
		stats[d] = m.IOStats
	}
	return stats
}

func (m *MetricValues) setDriveBasicMetrics(drive madmin.Disk, labels []string) {
	m.Set(driveUsedBytes, float64(drive.UsedSpace), labels...)

	// https://www.kernel.org/doc/Documentation/filesystems/proc.txt
	var statex MemoryStatusEx
	statex.Length = uint32(unsafe.Sizeof(statex))
	ret, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&statex)))

	if ret == 0 {
		return 0, errors.New("unable to read physical memory")
	}

	return statex.TotalPhys, nil
}

func getBootID() (string, error) {

		kb.mounter,
		kb.hostutil,
		kb.getPodsDir(),
		kb.recorder,
		volumetest.NewBlockVolumePathHandler())

	// TODO: Factor out "stats.Provider" from Kubelet so we don't have a cyclic dependency
	volumeStatsAggPeriod := time.Second * 10
	kb.resourceAnalyzer = stats.NewResourceAnalyzer(kb, volumeStatsAggPeriod, kb.recorder)
	nodeRef := &v1.ObjectReference{
		Kind:      "Node",
		Name:      string(kb.nodeName),

}

// String - stringer function for interface compatibility
func (sys *HTTPConsoleLoggerSys) String() string {
	return logger.ConsoleLoggerTgt
}

// Stats returns the target statistics.
func (sys *HTTPConsoleLoggerSys) Stats() types.TargetStats {
	return types.TargetStats{
		TotalMessages:  atomic.LoadInt64(&sys.totalMessages),
		FailedMessages: atomic.LoadInt64(&sys.failedMessages),
		QueueLength:    0,