model

type Cluster interface {
	// The Update operation populates the Cluster from a cache.
	Update(cache.Cache) error

	// The GetXMetric operations extract timeseries from the Cluster.
	// The returned time.Time values signify the latest metric timestamp in the cluster.
	GetClusterMetric(ClusterRequest) ([]store.TimePoint, time.Time, error)
	GetNodeMetric(NodeRequest) ([]store.TimePoint, time.Time, error)
	GetNamespaceMetric(NamespaceRequest) ([]store.TimePoint, time.Time, error)
	GetPodMetric(PodRequest) ([]store.TimePoint, time.Time, error)
	GetPodContainerMetric(PodContainerRequest) ([]store.TimePoint, time.Time, error)
	GetFreeContainerMetric(FreeContainerRequest) ([]store.TimePoint, time.Time, error)

	// The normal Get operations extract information from the Cluster structure.
	GetAvailableMetrics() []string
	GetNodes() []string
	GetNamespaces() []string
	GetPods(string) []string
	GetPodContainers(string, string) []string
	GetFreeContainers(string) []string
}

type ClusterInfo struct {
	InfoType
	Namespaces map[string]*NamespaceInfo // key: Namespace Name
	Nodes      map[string]*NodeInfo      // key: Hostname
}

type ClusterRequest struct {
	MetricName string
	Start      time.Time
	End        time.Time
}

type ContainerInfo struct {
	InfoType
}

type FreeContainerRequest struct {
	NodeName      string
	ContainerName string
	MetricName    string
	Start         time.Time
	End           time.Time
}

type InfoType struct {
	Metrics map[string]*store.TimeStore // key: Metric Name
	Labels  map[string]string           // key: Label
	// Context retains instantaneous state for a specific InfoType.
	// Currently used for calculating instantaneous metrics from cumulative counterparts.
	Context map[string]*store.TimePoint // key: metric name
}

type NamespaceInfo struct {
	InfoType
	Pods map[string]*PodInfo // key: Pod Name
}

type NamespaceRequest struct {
	NamespaceName string
	MetricName    string
	Start         time.Time
	End           time.Time
}

type NodeInfo struct {
	InfoType
	Pods           map[string]*PodInfo       // key: Pod Name
	FreeContainers map[string]*ContainerInfo // key: Container Name
}

type NodeRequest struct {
	NodeName   string
	MetricName string
	Start      time.Time
	End        time.Time
}

type PodContainerRequest struct {
	NamespaceName string
	PodName       string
	ContainerName string
	MetricName    string
	Start         time.Time
	End           time.Time
}

type PodInfo struct {
	InfoType
	UID        string
	Containers map[string]*ContainerInfo // key: Container Name
}

type PodRequest struct {
	NamespaceName string
	PodName       string
	MetricName    string
	Start         time.Time
	End           time.Time
}