const PolicyTypeStatic policyType = "Static"

type ActivePodsFunc func() []*v1.Pod

type Manager interface {
	// Start is called during Kubelet initialization.
	Start(ctx context.Context, activePods ActivePodsFunc, sourcesReady config.SourcesReady, podStatusProvider status.PodStatusProvider, containerRuntime runtimeService, initialContainers containermap.ContainerMap) error

	// AddContainer adds the mapping between container ID to pod UID and the container name
	// The mapping used to remove the memory allocation during the container removal
	AddContainer(logger klog.Logger, p *v1.Pod, c *v1.Container, containerID string)

	// Allocate is called to pre-allocate memory resources during Pod admission.
	// This must be called at some point prior to the AddContainer() call for a container, e.g. at pod admission time.
	Allocate(pod *v1.Pod, container *v1.Container) error

	// RemoveContainer is called after Kubelet decides to kill or delete a
	// container. After this call, any memory allocated to the container is freed.
	RemoveContainer(logger klog.Logger, containerID string) error

	// State returns a read-only interface to the internal memory manager state.
	State() state.Reader

	// GetTopologyHints implements the topologymanager.HintProvider Interface
	// and is consulted to achieve NUMA aware resource alignment among this
	// and other resource controllers.
	GetTopologyHints(*v1.Pod, *v1.Container) map[string][]topologymanager.TopologyHint

	// GetPodTopologyHints implements the topologymanager.HintProvider Interface
	// and is consulted to achieve NUMA aware resource alignment among this
	// and other resource controllers.
	GetPodTopologyHints(*v1.Pod) map[string][]topologymanager.TopologyHint

	// GetMemoryNUMANodes provides NUMA nodes that are used to allocate the container memory
	GetMemoryNUMANodes(logger klog.Logger, pod *v1.Pod, container *v1.Container) sets.Set[int]

	// GetAllocatableMemory returns the amount of allocatable memory for each NUMA node
	GetAllocatableMemory() []state.Block

	// GetMemory returns the memory allocated by a container from NUMA nodes
	GetMemory(podUID, containerName string) []state.Block
}

type Policy interface {
	Name() string
	Start(logger klog.Logger, s state.State) error
	// Allocate call is idempotent
	Allocate(logger klog.Logger, s state.State, pod *v1.Pod, container *v1.Container) error
	// RemoveContainer call is idempotent
	RemoveContainer(logger klog.Logger, s state.State, podUID string, containerName string)
	// GetTopologyHints implements the topologymanager.HintProvider Interface
	// and is consulted to achieve NUMA aware resource alignment among this
	// and other resource controllers.
	GetTopologyHints(logger klog.Logger, s state.State, pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint
	// GetPodTopologyHints implements the topologymanager.HintProvider Interface
	// and is consulted to achieve NUMA aware resource alignment among this
	// and other resource controllers.
	GetPodTopologyHints(logger klog.Logger, s state.State, pod *v1.Pod) map[string][]topologymanager.TopologyHint
	// GetAllocatableMemory returns the amount of allocatable memory for each NUMA node
	GetAllocatableMemory(s state.State) []state.Block
}