package policer

import "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"

type nodeProcessStatus int8

const (
	nodeNotProcessed nodeProcessStatus = iota
	nodeDoesNotHoldObject
	nodeHoldsObject
	nodeStatusUnknown
	nodeIsUnderMaintenance
	nodeIsLocal
)

func (st nodeProcessStatus) Processed() bool {
	return st != nodeNotProcessed
}

// nodeCache tracks Policer's check progress.
type nodeCache map[uint64]nodeProcessStatus

func newNodeCache() nodeCache {
	return make(map[uint64]nodeProcessStatus)
}

func (n nodeCache) set(node netmap.NodeInfo, val nodeProcessStatus) {
	n[node.Hash()] = val
}

// processStatus returns current processing status of the storage node.
func (n nodeCache) processStatus(node netmap.NodeInfo) nodeProcessStatus {
	return n[node.Hash()]
}

// SubmitSuccessfulReplication marks given storage node as a current object
// replica holder.
//
// SubmitSuccessfulReplication implements replicator.TaskResult.
func (n nodeCache) SubmitSuccessfulReplication(node netmap.NodeInfo) {
	n.set(node, nodeHoldsObject)
}