/*
 * Copyright 2020-2024 Open Networking Foundation (ONF) and the ONF Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Package avcfg provides anig and vlan configuration functionality
package avcfg

import (
	"context"
	"encoding/binary"
	"fmt"
	"net"
	"strconv"
	"sync"
	"time"

	"github.com/cevaris/ordered_map"
	"github.com/looplab/fsm"
	"github.com/opencord/omci-lib-go/v2"
	me "github.com/opencord/omci-lib-go/v2/generated"
	"github.com/opencord/voltha-lib-go/v7/pkg/log"

	//ic "github.com/opencord/voltha-protos/v5/go/inter_container"
	//"github.com/opencord/voltha-protos/v5/go/openflow_13"
	//"github.com/opencord/voltha-protos/v5/go/voltha"
	cmn "github.com/opencord/voltha-openonu-adapter-go/internal/pkg/common"
	"github.com/opencord/voltha-openonu-adapter-go/internal/pkg/devdb"
)

const (
	// events of config PON ANI port FSM
	aniEvStart             = "aniEvStart"
	aniEvPrepareConfig     = "aniEvPrepareConfig"
	aniEvStartConfig       = "aniEvStartConfig"
	aniEvRxDot1pmapCResp   = "aniEvRxDot1pmapCResp"
	aniEvRxMbpcdResp       = "aniEvRxMbpcdResp"
	aniEvRxTcontsResp      = "aniEvRxTcontsResp"
	aniEvRxGemntcpsResp    = "aniEvRxGemntcpsResp"
	aniEvRxGemiwsResp      = "aniEvRxGemiwsResp"
	aniEvRxPrioqsResp      = "aniEvRxPrioqsResp"
	aniEvRxDot1pmapSResp   = "aniEvRxDot1pmapSResp"
	aniEvRemGemiw          = "aniEvRemGemiw"
	aniEvWaitFlowRem       = "aniEvWaitFlowRem"
	aniEvFlowRemDone       = "aniEvFlowRemDone"
	aniEvRxRemGemiwResp    = "aniEvRxRemGemiwResp"
	aniEvRxRemGemntpResp   = "aniEvRxRemGemntpResp"
	aniEvRxRemTdResp       = "aniEvRxRemTdResp"
	aniEvRemTcontPath      = "aniEvRemTcontPath"
	aniEvRxResetTcontResp  = "aniEvRxResetTcontResp"
	aniEvRxRem1pMapperResp = "aniEvRxRem1pMapperResp"
	aniEvRxRemAniBPCDResp  = "aniEvRxRemAniBPCDResp"
	aniEvTimeoutSimple     = "aniEvTimeoutSimple"
	aniEvTimeoutMids       = "aniEvTimeoutMids"
	aniEvReset             = "aniEvReset"
	aniEvRestart           = "aniEvRestart"
	aniEvSkipOmciConfig    = "aniEvSkipOmciConfig"
	aniEvRemGemDone        = "aniEvRemGemDone"
)
const (
	// states of config PON ANI port FSM
	aniStDisabled            = "aniStDisabled"
	aniStStarting            = "aniStStarting"
	aniStPrepareConfig       = "aniStPrepareConfig"
	aniStCreatingDot1PMapper = "aniStCreatingDot1PMapper"
	aniStCreatingMBPCD       = "aniStCreatingMBPCD"
	aniStSettingTconts       = "aniStSettingTconts"
	aniStCreatingGemNCTPs    = "aniStCreatingGemNCTPs"
	aniStCreatingGemIWs      = "aniStCreatingGemIWs"
	aniStSettingPQs          = "aniStSettingPQs"
	aniStSettingDot1PMapper  = "aniStSettingDot1PMapper"
	aniStConfigDone          = "aniStConfigDone"
	aniStRemovingGemIW       = "aniStRemovingGemIW"
	aniStWaitingFlowRem      = "aniStWaitingFlowRem"
	aniStRemovingGemNCTP     = "aniStRemovingGemNCTP"
	aniStRemovingTD          = "aniStRemovingTD"
	aniStResetTcont          = "aniStResetTcont"
	aniStRemDot1PMapper      = "aniStRemDot1PMapper"
	aniStRemAniBPCD          = "aniStRemAniBPCD"
	aniStRemoveDone          = "aniStRemoveDone"
	aniStResetting           = "aniStResetting"
)

const (
	bitTrafficSchedulerPtrSetPermitted = 0x0002 // Refer section 9.1.2 ONU-2G, table for "Quality of service (QoS) configuration flexibility" IE
)
const cTechProfileTypeXgsPon = "XGS-PON"

// definitions as per G.988
// Gem Encryption Key Ring
const (
	// No encryption. The downstream key index is ignored, and upstream traffic is transmitted with key index 0.
	GemEncryptKeyRingNoEncrypt = 0
	// Unicast payload encryption in both directions. Keys are generated by the ONU and transmitted	to the OLT via the PLOAM channel.
	GemEncryptKeyRingUnicastPayload = 1
	// Broadcast (multicast) encryption. Keys are generated by the OLT and distributed via the OMCI.
	GemEncryptKeyRingBroadcastMulticast = 2
	// Unicast encryption, downstream only. Keys are generated by the ONU and transmitted to the OLT via the PLOAM channel.
	GemEncryptKeyRingUnicastDownstreamOnly = 3
)

// CAniFsmIdleState - TODO: add comment
const CAniFsmIdleState = aniStConfigDone

type ponAniGemPortAttribs struct {
	qosPolicy      string
	pbitString     string
	staticACL      string
	dynamicACL     string
	gemPortID      uint16
	upQueueID      uint16
	downQueueID    uint16
	multicastGemID uint16
	direction      uint8
	weight         uint8
	isMulticast    bool
}

// UniPonAniConfigFsm defines the structure for the state machine to config the PON ANI ports of ONU UNI ports via OMCI
type UniPonAniConfigFsm struct {
	pDeviceHandler           cmn.IdeviceHandler
	pOnuDeviceEntry          cmn.IonuDeviceEntry
	pOmciCC                  *cmn.OmciCC
	pOnuUniPort              *cmn.OnuUniPort
	pUniTechProf             *OnuUniTechProf
	pOnuDB                   *devdb.OnuDeviceDB
	omciMIdsResponseReceived chan bool //separate channel needed for checking multiInstance OMCI message responses
	PAdaptFsm                *cmn.AdapterFsm
	chSuccess                chan<- uint8
	pLastTxMeInstance        *me.ManagedEntity
	waitFlowDeleteChannel    chan bool
	deviceID                 string
	techProfileType          string
	gemPortAttribsSlice      []ponAniGemPortAttribs
	requestEvent             cmn.OnuDeviceEvent
	mutexIsAwaitingResponse  sync.RWMutex
	mutexChanSet             sync.RWMutex
	mutexPLastTxMeInstance   sync.RWMutex
	mapperSP0ID              uint16
	macBPCD0ID               uint16
	tcont0ID                 uint16
	alloc0ID                 uint16
	uniTpKey                 uniTP
	techProfileID            uint8
	isCanceled               bool
	isAwaitingResponse       bool
	procStep                 uint8
	chanSet                  bool
	requestEventOffset       uint8 //used to indicate ConfigDone or Removed using successor (enum)
	isWaitingForFlowDelete   bool
	tcontSetBefore           bool
}

// NewUniPonAniConfigFsm is the 'constructor' for the state machine to config the PON ANI ports of ONU UNI ports via OMCI
func NewUniPonAniConfigFsm(ctx context.Context, apDevOmciCC *cmn.OmciCC, apUniPort *cmn.OnuUniPort, apUniTechProf *OnuUniTechProf,
	apOnuDB *devdb.OnuDeviceDB, aTechProfileID uint8, aTechProfileType string, aRequestEvent cmn.OnuDeviceEvent, aName string,
	apDeviceHandler cmn.IdeviceHandler, apOnuDeviceEntry cmn.IonuDeviceEntry, aCommChannel chan cmn.Message) *UniPonAniConfigFsm {
	instFsm := &UniPonAniConfigFsm{
		pDeviceHandler:  apDeviceHandler,
		pOnuDeviceEntry: apOnuDeviceEntry,
		deviceID:        apDeviceHandler.GetDeviceID(),
		pOmciCC:         apDevOmciCC,
		pOnuUniPort:     apUniPort,
		pUniTechProf:    apUniTechProf,
		pOnuDB:          apOnuDB,
		techProfileID:   aTechProfileID,
		techProfileType: aTechProfileType,
		requestEvent:    aRequestEvent,
		chanSet:         false,
		tcontSetBefore:  false,
	}
	instFsm.uniTpKey = uniTP{uniID: apUniPort.UniID, tpID: aTechProfileID}
	instFsm.waitFlowDeleteChannel = make(chan bool)

	instFsm.PAdaptFsm = cmn.NewAdapterFsm(aName, instFsm.deviceID, aCommChannel)
	if instFsm.PAdaptFsm == nil {
		logger.Errorw(ctx, "UniPonAniConfigFsm's cmn.AdapterFsm could not be instantiated!!", log.Fields{
			"device-id": instFsm.deviceID})
		return nil
	}

	instFsm.PAdaptFsm.PFsm = fsm.NewFSM(
		aniStDisabled,
		fsm.Events{

			{Name: aniEvStart, Src: []string{aniStDisabled}, Dst: aniStStarting},

			//Note: .1p-Mapper and MBPCD might also have multi instances (per T-Cont) - by now only one 1 T-Cont considered!
			{Name: aniEvPrepareConfig, Src: []string{aniStStarting}, Dst: aniStPrepareConfig},
			{Name: aniEvStartConfig, Src: []string{aniStPrepareConfig}, Dst: aniStCreatingDot1PMapper},
			{Name: aniEvRxDot1pmapCResp, Src: []string{aniStCreatingDot1PMapper}, Dst: aniStCreatingMBPCD},
			{Name: aniEvRxMbpcdResp, Src: []string{aniStCreatingMBPCD}, Dst: aniStSettingTconts},
			{Name: aniEvRxTcontsResp, Src: []string{aniStSettingTconts}, Dst: aniStCreatingGemNCTPs},
			// the creatingGemNCTPs state is used for multi ME config if required for all configured/available GemPorts
			{Name: aniEvRxGemntcpsResp, Src: []string{aniStCreatingGemNCTPs}, Dst: aniStCreatingGemIWs},
			// the creatingGemIWs state is used for multi ME config if required for all configured/available GemPorts
			{Name: aniEvRxGemiwsResp, Src: []string{aniStCreatingGemIWs}, Dst: aniStSettingPQs},
			// the settingPQs state is used for multi ME config if required for all configured/available upstream PriorityQueues
			{Name: aniEvRxPrioqsResp, Src: []string{aniStSettingPQs}, Dst: aniStSettingDot1PMapper},
			{Name: aniEvRxDot1pmapSResp, Src: []string{aniStSettingDot1PMapper}, Dst: aniStConfigDone},

			//for removing Gem related resources
			{Name: aniEvRemGemiw, Src: []string{aniStConfigDone}, Dst: aniStRemovingGemIW},
			{Name: aniEvWaitFlowRem, Src: []string{aniStRemovingGemIW}, Dst: aniStWaitingFlowRem},
			{Name: aniEvFlowRemDone, Src: []string{aniStWaitingFlowRem}, Dst: aniStRemovingGemIW},
			{Name: aniEvRxRemGemiwResp, Src: []string{aniStRemovingGemIW}, Dst: aniStRemovingGemNCTP},
			{Name: aniEvRxRemGemntpResp, Src: []string{aniStRemovingGemNCTP}, Dst: aniStRemovingTD},
			{Name: aniEvRxRemTdResp, Src: []string{aniStRemovingTD}, Dst: aniStRemDot1PMapper},
			{Name: aniEvRemGemDone, Src: []string{aniStRemDot1PMapper}, Dst: aniStConfigDone},
			{Name: aniEvRxRem1pMapperResp, Src: []string{aniStRemDot1PMapper}, Dst: aniStRemAniBPCD},
			{Name: aniEvRxRemAniBPCDResp, Src: []string{aniStRemAniBPCD}, Dst: aniStRemoveDone},

			//for removing TCONT related resources
			{Name: aniEvRemTcontPath, Src: []string{aniStConfigDone}, Dst: aniStResetTcont},
			{Name: aniEvRxResetTcontResp, Src: []string{aniStResetTcont}, Dst: aniStConfigDone},

			{Name: aniEvTimeoutSimple, Src: []string{aniStCreatingDot1PMapper, aniStCreatingMBPCD, aniStSettingTconts, aniStSettingDot1PMapper,
				aniStRemovingGemIW, aniStRemovingGemNCTP, aniStRemovingTD,
				aniStResetTcont, aniStRemDot1PMapper, aniStRemAniBPCD, aniStRemoveDone}, Dst: aniStStarting},
			{Name: aniEvTimeoutMids, Src: []string{
				aniStCreatingGemNCTPs, aniStCreatingGemIWs, aniStSettingPQs}, Dst: aniStStarting},

			// exceptional treatment for all states except aniStResetting
			{Name: aniEvReset, Src: []string{aniStStarting, aniStPrepareConfig, aniStCreatingDot1PMapper, aniStCreatingMBPCD,
				aniStSettingTconts, aniStCreatingGemNCTPs, aniStCreatingGemIWs, aniStSettingPQs, aniStSettingDot1PMapper,
				aniStConfigDone, aniStRemovingGemIW, aniStWaitingFlowRem, aniStRemovingGemNCTP, aniStRemovingTD,
				aniStResetTcont, aniStRemDot1PMapper, aniStRemAniBPCD, aniStRemoveDone}, Dst: aniStResetting},
			// the only way to get to resource-cleared disabled state again is via "resseting"
			{Name: aniEvRestart, Src: []string{aniStResetting}, Dst: aniStDisabled},
			{Name: aniEvSkipOmciConfig, Src: []string{aniStStarting, aniStPrepareConfig}, Dst: aniStConfigDone},
		},

		fsm.Callbacks{
			"enter_state":                         func(e *fsm.Event) { instFsm.PAdaptFsm.LogFsmStateChange(ctx, e) },
			("enter_" + aniStStarting):            func(e *fsm.Event) { instFsm.enterConfigStartingState(ctx, e) },
			("enter_" + aniStPrepareConfig):       func(e *fsm.Event) { instFsm.prepareAndEnterConfigState(ctx, e) },
			("enter_" + aniStCreatingDot1PMapper): func(e *fsm.Event) { instFsm.enterCreatingDot1PMapper(ctx, e) },
			("enter_" + aniStCreatingMBPCD):       func(e *fsm.Event) { instFsm.enterCreatingMBPCD(ctx, e) },
			("enter_" + aniStSettingTconts):       func(e *fsm.Event) { instFsm.enterSettingTconts(ctx, e) },
			("enter_" + aniStCreatingGemNCTPs):    func(e *fsm.Event) { instFsm.enterCreatingGemNCTPs(ctx, e) },
			("enter_" + aniStCreatingGemIWs):      func(e *fsm.Event) { instFsm.enterCreatingGemIWs(ctx, e) },
			("enter_" + aniStSettingPQs):          func(e *fsm.Event) { instFsm.enterSettingPQs(ctx, e) },
			("enter_" + aniStSettingDot1PMapper):  func(e *fsm.Event) { instFsm.enterSettingDot1PMapper(ctx, e) },
			("enter_" + aniStConfigDone):          func(e *fsm.Event) { instFsm.enterAniConfigDone(ctx, e) },
			("enter_" + aniStRemovingGemIW):       func(e *fsm.Event) { instFsm.enterRemovingGemIW(ctx, e) },
			("enter_" + aniStWaitingFlowRem):      func(e *fsm.Event) { instFsm.enterWaitingFlowRem(ctx, e) },
			("enter_" + aniStRemovingGemNCTP):     func(e *fsm.Event) { instFsm.enterRemovingGemNCTP(ctx, e) },
			("enter_" + aniStRemovingTD):          func(e *fsm.Event) { instFsm.enterRemovingTD(ctx, e) },
			("enter_" + aniStResetTcont):          func(e *fsm.Event) { instFsm.enterResettingTcont(ctx, e) },
			("enter_" + aniStRemDot1PMapper):      func(e *fsm.Event) { instFsm.enterRemoving1pMapper(ctx, e) },
			("enter_" + aniStRemAniBPCD):          func(e *fsm.Event) { instFsm.enterRemovingAniBPCD(ctx, e) },
			("enter_" + aniStRemoveDone):          func(e *fsm.Event) { instFsm.enterAniRemoveDone(ctx, e) },
			("enter_" + aniStResetting):           func(e *fsm.Event) { instFsm.enterResettingState(ctx, e) },
			("enter_" + aniStDisabled):            func(e *fsm.Event) { instFsm.enterDisabledState(ctx, e) },
		},
	)
	if instFsm.PAdaptFsm.PFsm == nil {
		logger.Errorw(ctx, "UniPonAniConfigFsm's Base FSM could not be instantiated!!", log.Fields{
			"device-id": instFsm.deviceID})
		return nil
	}

	logger.Debugw(ctx, "UniPonAniConfigFsm created", log.Fields{"device-id": instFsm.deviceID})
	return instFsm
}

// setFsmCompleteChannel sets the requested channel and channel result for transfer on success
func (oFsm *UniPonAniConfigFsm) setFsmCompleteChannel(aChSuccess chan<- uint8, aProcStep uint8) {
	oFsm.chSuccess = aChSuccess
	oFsm.procStep = aProcStep
	oFsm.setChanSet(true)
}

// CancelProcessing ensures that suspended processing at waiting on some response is aborted and reset of FSM
func (oFsm *UniPonAniConfigFsm) CancelProcessing(ctx context.Context) {
	logger.Info(ctx, "CancelProcessing entered", log.Fields{"device-id": oFsm.deviceID})
	//early indication about started reset processing
	oFsm.pUniTechProf.setProfileResetting(ctx, oFsm.pOnuUniPort.UniID, oFsm.techProfileID, true)
	//mutex protection is required for possible concurrent access to FSM members
	oFsm.mutexIsAwaitingResponse.Lock()
	oFsm.isCanceled = true
	if oFsm.isAwaitingResponse {
		//attention: for an unbuffered channel the sender is blocked until the value is received (processed)!
		// accordingly the mutex must be released before sending to channel here (mutex acquired in receiver)
		oFsm.mutexIsAwaitingResponse.Unlock()
		//use channel to indicate that the response waiting shall be aborted
		oFsm.omciMIdsResponseReceived <- false
	} else {
		oFsm.mutexIsAwaitingResponse.Unlock()
	}

	oFsm.mutexIsAwaitingResponse.Lock()
	if oFsm.isWaitingForFlowDelete {
		oFsm.mutexIsAwaitingResponse.Unlock()
		//use channel to indicate that the response waiting shall be aborted
		oFsm.waitFlowDeleteChannel <- false
	} else {
		oFsm.mutexIsAwaitingResponse.Unlock()
	}

	// in any case (even if it might be automatically requested by above cancellation of waiting) ensure resetting the FSM
	PAdaptFsm := oFsm.PAdaptFsm
	if PAdaptFsm != nil {
		// obviously calling some FSM event here directly does not work - so trying to decouple it ...
		if PAdaptFsm.PFsm != nil {
			_ = PAdaptFsm.PFsm.Event(aniEvReset)
		}
	}

	// possible access conflicts on internal data by next needed data clearance
	//   are avoided by using mutexTPState also from within clearAniSideConfig
	//   do not try to lock TpProcMutex here as done in previous code version
	//   as it may result in deadlock situations (as observed at soft-reboot handling where
	//   TpProcMutex is already locked by some ongoing TechProfile config/removal processing
	//remove all TechProf related internal data to allow for new configuration
	oFsm.pUniTechProf.clearAniSideConfig(ctx, oFsm.pOnuUniPort.UniID, oFsm.techProfileID)
}

//nolint:gocyclo
func (oFsm *UniPonAniConfigFsm) prepareAndEnterConfigState(ctx context.Context, _ *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm prepareAndEnterConfigState start", log.Fields{
		"device-id": oFsm.deviceID})
	aPAFsm := oFsm.PAdaptFsm
	if aPAFsm != nil && aPAFsm.PFsm != nil {
		var err error
		oFsm.mapperSP0ID, err = cmn.GenerateIeeMaperServiceProfileEID(uint16(oFsm.pOnuUniPort.MacBpNo), uint16(oFsm.techProfileID))
		if err != nil {
			logger.Errorw(ctx, "error generating maper id", log.Fields{"device-id": oFsm.deviceID,
				"techProfileID": oFsm.techProfileID, "error": err})
			return
		}
		oFsm.macBPCD0ID, err = cmn.GenerateANISideMBPCDEID(uint16(oFsm.pOnuUniPort.MacBpNo), uint16(oFsm.techProfileID))
		if err != nil {
			logger.Errorw(ctx, "error generating mbpcd id", log.Fields{"device-id": oFsm.deviceID,
				"techProfileID": oFsm.techProfileID, "error": err})
			return
		}
		logger.Debugw(ctx, "generated ids for ani config", log.Fields{"mapperSP0ID": strconv.FormatInt(int64(oFsm.mapperSP0ID), 16),
			"macBPCD0ID": strconv.FormatInt(int64(oFsm.macBPCD0ID), 16), "device-id": oFsm.deviceID,
			"macBpNo": oFsm.pOnuUniPort.MacBpNo, "techProfileID": oFsm.techProfileID})
		if oFsm.pOnuDeviceEntry == nil {
			logger.Errorw(ctx, "No valid OnuDevice - aborting", log.Fields{"device-id": oFsm.deviceID})
			return
		}
		// Access critical state with lock
		oFsm.pUniTechProf.mutexTPState.RLock()
		tcontInstID, tcontAlreadyExist, err := oFsm.pOnuDeviceEntry.AllocateFreeTcont(ctx, oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].tcontParams.allocID)
		if err != nil {
			logger.Errorw(ctx, "No TCont instances found", log.Fields{"device-id": oFsm.deviceID, "err": err})
			//reset the state machine to enable usage on subsequent requests
			oFsm.pUniTechProf.mutexTPState.RUnlock()
			_ = aPAFsm.PFsm.Event(aniEvReset)
			return
		}
		oFsm.tcont0ID = tcontInstID
		oFsm.tcontSetBefore = tcontAlreadyExist
		logger.Debugw(ctx, "used-tcont-instance-id", log.Fields{"tcont-inst-id": oFsm.tcont0ID,
			"alloc-id":          oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].tcontParams.allocID,
			"tcontAlreadyExist": tcontAlreadyExist,
			"device-id":         oFsm.deviceID})

		oFsm.alloc0ID = oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].tcontParams.allocID
		mapGemPortParams := oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].mapGemPortParams
		oFsm.pUniTechProf.mutexTPState.RUnlock()

		//for all TechProfile set GemIndices
		for _, gemEntry := range mapGemPortParams {
			loGemPortAttribs := ponAniGemPortAttribs{}

			//collect all GemConfigData in a separate Fsm related slice (needed also to avoid mix-up with unsorted mapPonAniConfig)

			if queueInstKeys := oFsm.pOnuDB.GetSortedInstKeys(ctx, me.PriorityQueueClassID); len(queueInstKeys) > 0 {

				loGemPortAttribs.gemPortID = gemEntry.gemPortID
				// MibDb usage: upstream PrioQueue.RelatedPort = xxxxyyyy with xxxx=TCont.Entity(incl. slot) and yyyy=prio
				// i.e.: search PrioQueue list with xxxx=actual T-Cont.Entity,
				// from that list use the PrioQueue.Entity with  gemEntry.prioQueueIndex == yyyy (expect 0..7)
				usQrelPortMask := uint32((((uint32)(oFsm.tcont0ID)) << 16) + uint32(gemEntry.prioQueueIndex))

				// MibDb usage: downstream PrioQueue.RelatedPort = xxyyzzzz with xx=slot, yy=UniPort and zzzz=prio
				// i.e.: search PrioQueue list with yy=actual pOnuUniPort.UniID,
				// from that list use the PrioQueue.Entity with gemEntry.prioQueueIndex == zzzz (expect 0..7)
				// Note: As we do not maintain any slot numbering, slot number will be excluded from search pattern.
				//       Furthermore OMCI Onu port-Id is expected to start with 1 (not 0).
				dsQrelPortMask := uint32((((uint32)(oFsm.pOnuUniPort.UniID + 1)) << 16) + uint32(gemEntry.prioQueueIndex))

				usQueueFound := false
				dsQueueFound := false
				for _, mgmtEntityID := range queueInstKeys {
					if meAttributes := oFsm.pOnuDB.GetMe(me.PriorityQueueClassID, mgmtEntityID); meAttributes != nil {
						returnVal := meAttributes[me.PriorityQueue_RelatedPort]
						if returnVal != nil {
							if relatedPort, err := oFsm.pOnuDB.GetUint32Attrib(returnVal); err == nil {
								if relatedPort == usQrelPortMask {
									loGemPortAttribs.upQueueID = mgmtEntityID
									logger.Debugw(ctx, "UpQueue for GemPort found:", log.Fields{"gemPortID": loGemPortAttribs.gemPortID,
										"upQueueID": strconv.FormatInt(int64(loGemPortAttribs.upQueueID), 16), "device-id": oFsm.deviceID})
									usQueueFound = true
								} else if (relatedPort&0xFFFFFF) == dsQrelPortMask && mgmtEntityID < 0x8000 {
									loGemPortAttribs.downQueueID = mgmtEntityID
									logger.Debugw(ctx, "DownQueue for GemPort found:", log.Fields{"gemPortID": loGemPortAttribs.gemPortID,
										"downQueueID": strconv.FormatInt(int64(loGemPortAttribs.downQueueID), 16), "device-id": oFsm.deviceID})
									dsQueueFound = true
								}
								if usQueueFound && dsQueueFound {
									break
								}
							} else {
								logger.Warnw(ctx, "Could not convert attribute value", log.Fields{"device-id": oFsm.deviceID})
							}
						} else {
							logger.Warnw(ctx, "PrioQueue.RelatedPort not found in meAttributes:", log.Fields{"device-id": oFsm.deviceID})
						}
					} else {
						logger.Warnw(ctx, "No attributes available in DB:", log.Fields{"meClassID": me.PriorityQueueClassID,
							"mgmtEntityID": mgmtEntityID, "device-id": oFsm.deviceID})
					}
				}
			} else {
				logger.Warnw(ctx, "No PriorityQueue instances found", log.Fields{"device-id": oFsm.deviceID})
			}
			loGemPortAttribs.direction = gemEntry.direction
			loGemPortAttribs.qosPolicy = gemEntry.queueSchedPolicy
			loGemPortAttribs.weight = gemEntry.queueWeight
			loGemPortAttribs.pbitString = gemEntry.pbitString

			if gemEntry.isMulticast {
				//TODO this might effectively ignore the for loop starting at line 316
				loGemPortAttribs.gemPortID = gemEntry.multicastGemPortID
				loGemPortAttribs.isMulticast = true
				loGemPortAttribs.multicastGemID = gemEntry.multicastGemPortID
				loGemPortAttribs.staticACL = gemEntry.staticACL
				loGemPortAttribs.dynamicACL = gemEntry.dynamicACL

				logger.Debugw(ctx, "Multicast GemPort attributes:", log.Fields{
					"gemPortID":      loGemPortAttribs.gemPortID,
					"isMulticast":    loGemPortAttribs.isMulticast,
					"multicastGemID": loGemPortAttribs.multicastGemID,
					"staticACL":      loGemPortAttribs.staticACL,
					"dynamicACL":     loGemPortAttribs.dynamicACL,
					"device-id":      oFsm.deviceID,
				})

			} else {
				logger.Debugw(ctx, "Upstream GemPort attributes:", log.Fields{
					"gemPortID":      loGemPortAttribs.gemPortID,
					"upQueueID":      loGemPortAttribs.upQueueID,
					"downQueueID":    loGemPortAttribs.downQueueID,
					"pbitString":     loGemPortAttribs.pbitString,
					"prioQueueIndex": gemEntry.prioQueueIndex,
					"device-id":      oFsm.deviceID,
				})
			}

			oFsm.gemPortAttribsSlice = append(oFsm.gemPortAttribsSlice, loGemPortAttribs)
			if oFsm.pDeviceHandler.IsSkipOnuConfigReconciling() {
				meParams := me.ParamData{
					EntityID: loGemPortAttribs.gemPortID,
					Attributes: me.AttributeValueMap{
						me.GemPortNetworkCtp_PortId:                              loGemPortAttribs.gemPortID,
						me.GemPortNetworkCtp_TContPointer:                        oFsm.tcont0ID,
						me.GemPortNetworkCtp_Direction:                           loGemPortAttribs.direction,
						me.GemPortNetworkCtp_TrafficManagementPointerForUpstream: loGemPortAttribs.upQueueID,
						me.GemPortNetworkCtp_PriorityQueuePointerForDownStream:   loGemPortAttribs.downQueueID,
					},
				}
				oFsm.pOnuDB.PutOnuSpeficMe(ctx, me.GemPortNetworkCtpClassID, loGemPortAttribs.gemPortID, meParams.Attributes)
				var meAttributes me.AttributeValueMap //dummy , anyways we are not going to use the values.
				oFsm.pOnuDB.PutOnuSpeficMe(ctx, me.GemPortNetworkCtpPerformanceMonitoringHistoryDataClassID, loGemPortAttribs.gemPortID, meAttributes)

				oFsm.pOnuDB.PutOnuSpeficMe(ctx, me.GemInterworkingTerminationPointClassID, loGemPortAttribs.gemPortID, meAttributes)

			}
		}
		if !oFsm.pDeviceHandler.IsSkipOnuConfigReconciling() {
			//let the state machine run forward from here directly
			if oFsm.PAdaptFsm != nil {
				go func(aPAFsm *cmn.AdapterFsm) {
					if aPAFsm != nil && aPAFsm.PFsm != nil {
						_ = aPAFsm.PFsm.Event(aniEvStartConfig)
					}
				}(oFsm.PAdaptFsm)

			}
		} else {
			logger.Debugw(ctx, "reconciling - skip omci-config of ANI side ", log.Fields{"device-id": oFsm.deviceID})
			//let the state machine run forward from here directly
			if oFsm.PAdaptFsm != nil {
				go func(aPAFsm *cmn.AdapterFsm) {
					if aPAFsm != nil && aPAFsm.PFsm != nil {
						_ = aPAFsm.PFsm.Event(aniEvSkipOmciConfig)
					}
				}(oFsm.PAdaptFsm)

			}
		}
		logger.Info(ctx, "UniPonAniConfigFsm prepareAndEnterConfigState end", log.Fields{
			"device-id": oFsm.deviceID})
	}
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterConfigStartingState(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm start", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	// in case the used channel is not yet defined (can be re-used after restarts)
	if oFsm.omciMIdsResponseReceived == nil {
		oFsm.omciMIdsResponseReceived = make(chan bool)
		logger.Debug(ctx, "UniPonAniConfigFsm - OMCI multiInstance RxChannel defined")
	} else {
		// as we may 're-use' this instance of FSM and the connected channel
		// make sure there is no 'lingering' request in the already existing channel:
		// (simple loop sufficient as we are the only receiver)
		for len(oFsm.omciMIdsResponseReceived) > 0 {
			<-oFsm.omciMIdsResponseReceived
		}
	}
	//ensure internal slices are empty (which might be set from previous run) - release memory
	oFsm.gemPortAttribsSlice = nil
	oFsm.mutexIsAwaitingResponse.Lock()
	//reset the canceled state possibly existing from previous reset
	oFsm.isCanceled = false
	oFsm.mutexIsAwaitingResponse.Unlock()

	// start go routine for processing of ANI config messages
	go oFsm.processOmciAniMessages(ctx)

	//let the state machine run forward from here directly
	pConfigAniStateAFsm := oFsm.PAdaptFsm
	if pConfigAniStateAFsm != nil {
		// obviously calling some FSM event here directly does not work - so trying to decouple it ...
		go func(aPAFsm *cmn.AdapterFsm) {
			if aPAFsm != nil && aPAFsm.PFsm != nil {
				_ = aPAFsm.PFsm.Event(aniEvPrepareConfig)
			}
		}(pConfigAniStateAFsm)

	}
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterCreatingDot1PMapper(ctx context.Context, e *fsm.Event) {
	logger.Debugw(ctx, "UniPonAniConfigFsm Tx Create::Dot1PMapper", log.Fields{
		"EntitytId": strconv.FormatInt(int64(oFsm.mapperSP0ID), 16),
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	oFsm.requestEventOffset = 0 //0 offset for last config request activity
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendCreateDot1PMapper(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.mapperSP0ID, oFsm.PAdaptFsm.CommChan)
	if err != nil {
		logger.Errorw(ctx, "Dot1PMapper create failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	//accept also nil as (error) return value for writing to LastTx
	//  - this avoids misinterpretation of new received OMCI messages
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()

}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterCreatingMBPCD(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "Creating Tx MAC Bridge Port Config Data", log.Fields{
		"EntitytId": strconv.FormatInt(int64(oFsm.macBPCD0ID), 16),
		"TPPtr":     strconv.FormatInt(int64(oFsm.mapperSP0ID), 16),
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	bridgePtr := cmn.MacBridgeServiceProfileEID + uint16(oFsm.pOnuUniPort.MacBpNo) //cmp also omci_cc.go::sendCreateMBServiceProfile
	meParams := me.ParamData{
		EntityID: oFsm.macBPCD0ID,
		Attributes: me.AttributeValueMap{
			me.MacBridgePortConfigurationData_BridgeIdPointer: bridgePtr,
			me.MacBridgePortConfigurationData_PortNum:         0xFF, //fixed unique ANI side indication
			me.MacBridgePortConfigurationData_TpType:          3,    //for .1PMapper
			me.MacBridgePortConfigurationData_TpPointer:       oFsm.mapperSP0ID,
		},
	}
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendCreateMBPConfigDataVar(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, meParams)
	if err != nil {
		logger.Errorw(ctx, "MBPConfigDataVar create failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	//accept also nil as (error) return value for writing to LastTx
	//  - this avoids misinterpretation of new received OMCI messages
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()

}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterSettingTconts(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "Tx Setting Tcont ", log.Fields{
		"EntitytId": strconv.FormatInt(int64(oFsm.tcont0ID), 16),
		"AllocId":   strconv.FormatInt(int64(oFsm.alloc0ID), 16),
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID,
		"tcontExist": oFsm.tcontSetBefore})
	//If tcont was set before, then no need to set it again. Let state machine to proceed.
	if oFsm.tcontSetBefore {
		go func(aPAFsm *cmn.AdapterFsm) {
			if aPAFsm != nil && aPAFsm.PFsm != nil {
				_ = aPAFsm.PFsm.Event(aniEvRxTcontsResp)
			}
		}(oFsm.PAdaptFsm)
		return
	}
	meParams := me.ParamData{
		EntityID: oFsm.tcont0ID,
		Attributes: me.AttributeValueMap{
			me.TCont_AllocId: oFsm.alloc0ID,
		},
	}
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendSetTcontVar(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, meParams)
	if err != nil {
		logger.Errorw(ctx, "TcontVar set failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	//accept also nil as (error) return value for writing to LastTx
	//  - this avoids misinterpretation of new received OMCI messages
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()

}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterCreatingGemNCTPs(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start creating GemNWCtp loop", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	go oFsm.performCreatingGemNCTPs(ctx)
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterCreatingGemIWs(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start creating GemIwTP loop", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	go oFsm.performCreatingGemIWs(ctx)
}

func (oFsm *UniPonAniConfigFsm) enterSettingPQs(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start setting PrioQueue loop", log.Fields{
		"in state": e.FSM.Current(), "device-id": oFsm.deviceID})
	go oFsm.performSettingPQs(ctx)
}

func (oFsm *UniPonAniConfigFsm) enterSettingDot1PMapper(ctx context.Context, e *fsm.Event) {

	logger.Info(ctx, "UniPonAniConfigFsm Tx Set::.1pMapper with all PBits set", log.Fields{"EntitytId": 0x8042, /*cmp above*/
		"toGemIw":   1024, /* cmp above */
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})

	logger.Info(ctx, "UniPonAniConfigFsm Tx Set::1pMapper", log.Fields{
		"EntitytId": strconv.FormatInt(int64(oFsm.mapperSP0ID), 16),
		"in state":  e.FSM.Current(), "device-id": oFsm.deviceID})

	meParams := me.ParamData{
		EntityID:   oFsm.mapperSP0ID,
		Attributes: make(me.AttributeValueMap),
	}

	//assign the GemPorts according to the configured Prio
	var loPrioGemPortArray [8]uint16
	for _, gemPortAttribs := range oFsm.gemPortAttribsSlice {
		if gemPortAttribs.isMulticast {
			logger.Debugw(ctx, "UniPonAniConfigFsm Port is Multicast, ignoring .1pMapper", log.Fields{
				"device-id": oFsm.deviceID, "GemPort": gemPortAttribs.gemPortID,
				"prioString": gemPortAttribs.pbitString})
			continue
		}
		if gemPortAttribs.pbitString == "" {
			logger.Warnw(ctx, "UniPonAniConfigFsm PrioString empty string error", log.Fields{
				"device-id": oFsm.deviceID, "GemPort": gemPortAttribs.gemPortID,
				"prioString": gemPortAttribs.pbitString})
			continue
		}
		for i := 0; i < 8; i++ {
			// "lenOfPbitMap(8) - i + 1" will give i-th pbit value from LSB position in the pbit map string
			if prio, err := strconv.Atoi(string(gemPortAttribs.pbitString[7-i])); err == nil {
				if prio == 1 { // Check this p-bit is set
					if loPrioGemPortArray[i] == 0 {
						loPrioGemPortArray[i] = gemPortAttribs.gemPortID //gemPortId=EntityID and unique
					} else {
						logger.Warnw(ctx, "UniPonAniConfigFsm PrioString not unique", log.Fields{
							"device-id": oFsm.deviceID, "IgnoredGemPort": gemPortAttribs.gemPortID,
							"SetGemPort": loPrioGemPortArray[i]})
					}
				}
			} else {
				logger.Warnw(ctx, "UniPonAniConfigFsm PrioString evaluation error", log.Fields{
					"device-id": oFsm.deviceID, "GemPort": gemPortAttribs.gemPortID,
					"prioString": gemPortAttribs.pbitString, "position": i})
			}

		}
	}

	var foundIwPtr = false
	for index, value := range loPrioGemPortArray {
		meAttribute := fmt.Sprintf("InterworkTpPointerForPBitPriority%d", index)
		if value != 0 {
			foundIwPtr = true
			meParams.Attributes[meAttribute] = value
			logger.Debugw(ctx, "UniPonAniConfigFsm Set::1pMapper", log.Fields{
				"for Prio":  index,
				"IwPtr":     strconv.FormatInt(int64(value), 16),
				"device-id": oFsm.deviceID})
		} else {
			// The null pointer 0xFFFF specifies that frames with the associated priority are to be discarded.
			// setting this parameter is not strictly needed anymore with the ensured .1pMapper create default setting
			// but except for processing effort does not really harm - left to keep changes low
			meParams.Attributes[meAttribute] = 0xffff
		}
	}
	// The TP type value 0 also indicates bridging mapping, and the TP pointer should be set to 0xFFFF
	// setting this parameter is not strictly needed anymore with the ensured .1pMapper create default setting
	// but except for processing effort does not really harm - left to keep changes low
	meParams.Attributes[me.Ieee8021PMapperServiceProfile_TpPointer] = 0xffff

	if !foundIwPtr {
		logger.Warn(ctx, "UniPonAniConfigFsm no GemIwPtr found for .1pMapper - abort", log.Fields{
			"device-id": oFsm.deviceID})
		//TODO With multicast is possible that no upstream gem ports are not present in the tech profile,
		// this reset needs to be performed only if the tech profile provides upstream gem ports but no priority is set
		//let's reset the state machine in order to release all resources now
		//pConfigAniStateAFsm := oFsm.PAdaptFsm
		//if pConfigAniStateAFsm != nil {
		//	// obviously calling some FSM event here directly does not work - so trying to decouple it ...
		//	go func(aPAFsm *cmn.AdapterFsm) {
		//		if aPAFsm != nil && aPAFsm.PFsm != nil {
		//			_ = aPAFsm.PFsm.Event(aniEvReset)
		//		}
		//	}(pConfigAniStateAFsm)
		//}
		//Moving forward the FSM as if the response was received correctly.
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvRxDot1pmapSResp)
				}
			}(pConfigAniStateAFsm)
		}
	} else {
		oFsm.mutexPLastTxMeInstance.Lock()
		meInstance, err := oFsm.pOmciCC.SendSetDot1PMapperVar(context.TODO(), oFsm.pDeviceHandler.GetOmciTimeout(), true,
			oFsm.PAdaptFsm.CommChan, meParams)
		if err != nil {
			logger.Errorw(ctx, "Dot1PMapperVar set failed, aborting UniPonAniConfigFsm!",
				log.Fields{"device-id": oFsm.deviceID})
			pConfigAniStateAFsm := oFsm.PAdaptFsm
			if pConfigAniStateAFsm != nil {
				oFsm.mutexPLastTxMeInstance.Unlock()
				// obviously calling some FSM event here directly does not work - so trying to decouple it ...
				go func(aPAFsm *cmn.AdapterFsm) {
					if aPAFsm != nil && aPAFsm.PFsm != nil {
						_ = aPAFsm.PFsm.Event(aniEvReset)
					}
				}(pConfigAniStateAFsm)
				return
			}
		}
		//accept also nil as (error) return value for writing to LastTx
		//  - this avoids misinterpretation of new received OMCI messages
		oFsm.pLastTxMeInstance = meInstance
		oFsm.mutexPLastTxMeInstance.Unlock()
	}
}

func (oFsm *UniPonAniConfigFsm) enterAniConfigDone(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm ani config done", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
	//store that the UNI related techProfile processing is done for the given Profile and Uni
	oFsm.pUniTechProf.setConfigDone(oFsm.pOnuUniPort.UniID, oFsm.techProfileID, true)
	if !oFsm.pDeviceHandler.IsSkipOnuConfigReconciling() {
		//use DeviceHandler event notification directly
		oFsm.pDeviceHandler.DeviceProcStatusUpdate(ctx, cmn.OnuDeviceEvent((uint8(oFsm.requestEvent) + oFsm.requestEventOffset)))
		//if techProfile processing is done it must be checked, if some prior/parallel flow configuration is pending
		//  but only in case the techProfile was configured (not deleted)
		if oFsm.requestEventOffset == 0 {
			go oFsm.pDeviceHandler.VerifyUniVlanConfigRequest(ctx, oFsm.pOnuUniPort, oFsm.techProfileID)
		}
	} else {
		logger.Debugw(ctx, "reconciling - skip AniConfigDone processing", log.Fields{"device-id": oFsm.deviceID})
	}
	if oFsm.isChanSet() {
		// indicate processing done to the caller
		logger.Debugw(ctx, "UniPonAniConfigFsm processingDone on channel", log.Fields{
			"ProcessingStep": oFsm.procStep, "from_State": e.FSM.Current(), "device-id": oFsm.deviceID})
		oFsm.chSuccess <- oFsm.procStep
		oFsm.setChanSet(false) //reset the internal channel state
	}

	//the FSM is left active in this state as long as no specific reset or remove is requested from outside
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterRemovingGemIW(ctx context.Context, e *fsm.Event) {
	// no need to protect access to oFsm.waitFlowDeleteChannel, only used in synchronized state entries
	//  or CancelProcessing() that uses separate isWaitingForFlowDelete to write to the channel
	//flush the waitFlowDeleteChannel - possibly already/still set by some previous activity
	select {
	case <-oFsm.waitFlowDeleteChannel:
		logger.Debug(ctx, "flushed waitFlowDeleteChannel")
	default:
	}

	uniVlanConfigFsm := oFsm.pDeviceHandler.GetUniVlanConfigFsm(oFsm.pOnuUniPort.UniID)
	if uniVlanConfigFsm != nil {
		// ensure mutexTPState not locked before calling some VlanConfigFsm activity (that might already be pending on it)
		if uniVlanConfigFsm.IsFlowRemovePending(ctx, oFsm.waitFlowDeleteChannel) {
			logger.Debugw(ctx, "flow remove pending - wait before processing gem port delete",
				log.Fields{"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
			// if flow remove is pending then wait for flow remove to finish first before proceeding with gem port delete
			pConfigAniStateAFsm := oFsm.PAdaptFsm
			if pConfigAniStateAFsm != nil {
				// obviously calling some FSM event here directly does not work - so trying to decouple it ...
				go func(aPAFsm *cmn.AdapterFsm) {
					if aPAFsm != nil && aPAFsm.PFsm != nil {
						_ = aPAFsm.PFsm.Event(aniEvWaitFlowRem)
					}
				}(pConfigAniStateAFsm)
			} else {
				logger.Errorw(ctx, "pConfigAniStateAFsm is nil", log.Fields{"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
			}
			return
		}
	} else {
		logger.Debugw(ctx, "uni vlan config doesn't exist - no flow remove could be pending",
			log.Fields{"device-id": oFsm.deviceID, "techProfile-id": oFsm.techProfileID})
	}

	oFsm.pUniTechProf.mutexTPState.RLock()
	// get the related GemPort entity Id from pUniTechProf, OMCI Gem* entityID is set to be equal to GemPortId!
	loGemPortID := (*(oFsm.pUniTechProf.mapRemoveGemEntry[oFsm.uniTpKey])).gemPortID
	oFsm.pUniTechProf.mutexTPState.RUnlock()
	logger.Debugw(ctx, "UniPonAniConfigFsm - start removing one GemIwTP", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID,
		"GemIwTp-entity-id": loGemPortID})
	oFsm.requestEventOffset = 1 //offset 1 to indicate last activity = remove

	// this state entry is only expected in a suitable state (checked outside in onu_uni_tp)
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendDeleteGemIWTP(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, loGemPortID)
	if err != nil {
		logger.Errorw(ctx, "GemIWTP delete failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()
	logger.Infow(ctx, "Deleting  GemIWTP at  the ONU DB ", log.Fields{"device-id": oFsm.deviceID, "GEMID": loGemPortID})
	oFsm.pOnuDB.DeleteMe(me.GemInterworkingTerminationPointClassID, loGemPortID)
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterWaitingFlowRem(ctx context.Context, e *fsm.Event) {
	oFsm.mutexIsAwaitingResponse.Lock()
	oFsm.isWaitingForFlowDelete = true
	oFsm.mutexIsAwaitingResponse.Unlock()
	select {
	// maybe be also some outside cancel (but no context modeled for the moment ...)
	// case <-ctx.Done():
	// 		logger.Infow("LockState-bridge-init message reception canceled", log.Fields{"for device-id": oFsm.deviceID})
	case <-time.After(2 * oFsm.pOmciCC.GetMaxOmciTimeoutWithRetries() * time.Second): //give flow processing enough time to finish (but try to be less than rwCore flow timeouts)
		logger.Warnw(ctx, "UniPonAniConfigFsm WaitingFlowRem timeout", log.Fields{
			"for device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
		oFsm.mutexIsAwaitingResponse.Lock()
		oFsm.isWaitingForFlowDelete = false
		oFsm.mutexIsAwaitingResponse.Unlock()
		//if the flow is not removed as expected we just try to continue with GemPort removal and hope things are clearing up afterwards
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvFlowRemDone)
				}
			}(pConfigAniStateAFsm)
		} else {
			logger.Errorw(ctx, "pConfigAniStateAFsm is nil", log.Fields{
				"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
		}
		return

	case success := <-oFsm.waitFlowDeleteChannel:
		if success {
			logger.Debugw(ctx, "UniPonAniConfigFsm flow removed info received", log.Fields{
				"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
			oFsm.mutexIsAwaitingResponse.Lock()
			oFsm.isWaitingForFlowDelete = false
			oFsm.mutexIsAwaitingResponse.Unlock()
			pConfigAniStateAFsm := oFsm.PAdaptFsm
			if pConfigAniStateAFsm != nil {
				// obviously calling some FSM event here directly does not work - so trying to decouple it ...
				go func(aPAFsm *cmn.AdapterFsm) {
					if aPAFsm != nil && aPAFsm.PFsm != nil {
						_ = aPAFsm.PFsm.Event(aniEvFlowRemDone)
					}
				}(pConfigAniStateAFsm)
			} else {
				logger.Errorw(ctx, "pConfigAniStateAFsm is nil", log.Fields{
					"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
			}
			return
		}
		// waiting was aborted (probably on external request)
		logger.Debugw(ctx, "UniPonAniConfigFsm WaitingFlowRem aborted", log.Fields{
			"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "techProfile-id": oFsm.techProfileID})
		oFsm.mutexIsAwaitingResponse.Lock()
		oFsm.isWaitingForFlowDelete = false
		oFsm.mutexIsAwaitingResponse.Unlock()
		//to be sure we can just generate the reset-event to ensure leaving this state towards 'reset'
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
		}
		return
	}
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterRemovingGemNCTP(ctx context.Context, e *fsm.Event) {
	oFsm.pUniTechProf.mutexTPState.RLock()
	loGemPortID := (*(oFsm.pUniTechProf.mapRemoveGemEntry[oFsm.uniTpKey])).gemPortID
	oFsm.pUniTechProf.mutexTPState.RUnlock()
	logger.Info(ctx, "UniPonAniConfigFsm - start removing one GemNCTP", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID,
		"GemNCTP-entity-id": loGemPortID})
	// this state entry is only expected in a suitable state (checked outside in onu_uni_tp)
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendDeleteGemNCTP(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, loGemPortID)
	if err != nil {
		logger.Errorw(ctx, "GemNCTP delete failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()
	oFsm.pOnuDB.DeleteMe(me.GemPortNetworkCtpClassID, loGemPortID)
	// Mark the gem port to be removed for Performance History monitoring
	OnuMetricsManager := oFsm.pDeviceHandler.GetOnuMetricsManager()
	if OnuMetricsManager != nil {
		OnuMetricsManager.RemoveGemPortForPerfMonitoring(ctx, loGemPortID)
	}
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterRemovingTD(ctx context.Context, e *fsm.Event) {
	oFsm.pUniTechProf.mutexTPState.RLock()
	loGemPortID := (*(oFsm.pUniTechProf.mapRemoveGemEntry[oFsm.uniTpKey])).gemPortID
	oFsm.pUniTechProf.mutexTPState.RUnlock()
	logger.Info(ctx, "UniPonAniConfigFsm - start removing Traffic Descriptor", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID,
		"TD-entity-id": loGemPortID})

	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendDeleteTD(log.WithSpanFromContext(context.TODO(), ctx),
		oFsm.pDeviceHandler.GetOmciTimeout(), true, oFsm.PAdaptFsm.CommChan, loGemPortID)

	if err != nil {
		logger.Errorw(ctx, "TD delete failed - proceed fsm",
			log.Fields{"device-id": oFsm.deviceID, "gemPortID": loGemPortID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterResettingTcont(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start resetting the TCont", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})

	oFsm.requestEventOffset = 1 //offset 1 for last remove activity
	// this state entry is only expected in a suitable state (checked outside in onu_uni_tp)
	meParams := me.ParamData{
		EntityID: oFsm.tcont0ID,
		Attributes: me.AttributeValueMap{
			me.TCont_AllocId: cmn.UnusedTcontAllocID,
		},
	}
	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendSetTcontVar(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, meParams)
	if err != nil {
		logger.Errorw(ctx, "TcontVar set failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()

}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterRemoving1pMapper(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start deleting the .1pMapper", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	var mapGemPortParams map[uint16]*gemPortParamStruct
	unicastGemCount := 0
	oFsm.pUniTechProf.mutexTPState.RLock()
	if _, ok := oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey]; ok {
		mapGemPortParams = oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].mapGemPortParams
	} else {
		logger.Warnw(ctx, "GemPortParams not found in mapPonAniConfig", log.Fields{"device-id": oFsm.deviceID,
			"uni-id": oFsm.pOnuUniPort.UniID})
	}
	oFsm.pUniTechProf.mutexTPState.RUnlock()
	for _, gemEntry := range mapGemPortParams {
		if !gemEntry.isMulticast {
			unicastGemCount++
		}
	}
	if unicastGemCount > 1 {
		logger.Debugw(ctx, "UniPonAniConfigFsm - Not the last gem in fsm. Skip the rest", log.Fields{
			"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "unicast-gem-count": unicastGemCount, "gem-count": len(mapGemPortParams)})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvRemGemDone)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	logger.Debugw(ctx, "UniPonAniConfigFsm - Last gem in fsm. Continue with Mapper removal", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID, "unicast-gem-count": unicastGemCount, "gem-count": len(mapGemPortParams)})

	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendDeleteDot1PMapper(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, oFsm.mapperSP0ID)
	if err != nil {
		logger.Errorw(ctx, "Dot1Mapper delete failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()

}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterRemovingAniBPCD(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm - start deleting the ANI MBCD", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})

	oFsm.mutexPLastTxMeInstance.Lock()
	meInstance, err := oFsm.pOmciCC.SendDeleteMBPConfigData(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
		oFsm.PAdaptFsm.CommChan, oFsm.macBPCD0ID)
	if err != nil {
		logger.Errorw(ctx, "MBPConfigData delete failed, aborting UniPonAniConfigFsm!",
			log.Fields{"device-id": oFsm.deviceID})
		pConfigAniStateAFsm := oFsm.PAdaptFsm
		if pConfigAniStateAFsm != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			// obviously calling some FSM event here directly does not work - so trying to decouple it ...
			go func(aPAFsm *cmn.AdapterFsm) {
				if aPAFsm != nil && aPAFsm.PFsm != nil {
					_ = aPAFsm.PFsm.Event(aniEvReset)
				}
			}(pConfigAniStateAFsm)
			return
		}
	}
	oFsm.pLastTxMeInstance = meInstance
	oFsm.mutexPLastTxMeInstance.Unlock()
}

func (oFsm *UniPonAniConfigFsm) enterAniRemoveDone(ctx context.Context, e *fsm.Event) {
	logger.Info(ctx, "UniPonAniConfigFsm ani removal done", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	//use DeviceHandler event notification directly
	oFsm.pDeviceHandler.DeviceProcStatusUpdate(ctx, cmn.OnuDeviceEvent((uint8(oFsm.requestEvent) + oFsm.requestEventOffset)))
	if oFsm.isChanSet() {
		// indicate processing done to the caller
		logger.Debugw(ctx, "UniPonAniConfigFsm processingDone on channel", log.Fields{
			"ProcessingStep": oFsm.procStep, "from_State": e.FSM.Current(), "device-id": oFsm.deviceID})
		oFsm.chSuccess <- oFsm.procStep
		oFsm.setChanSet(false) //reset the internal channel state
	}

	//let's reset the state machine in order to release all resources now
	pConfigAniStateAFsm := oFsm.PAdaptFsm
	if pConfigAniStateAFsm != nil {
		// obviously calling some FSM event here directly does not work - so trying to decouple it ...
		go func(aPAFsm *cmn.AdapterFsm) {
			if aPAFsm != nil && aPAFsm.PFsm != nil {
				_ = aPAFsm.PFsm.Event(aniEvReset)
			}
		}(pConfigAniStateAFsm)
	}
}

func (oFsm *UniPonAniConfigFsm) enterResettingState(ctx context.Context, e *fsm.Event) {
	logger.Debugw(ctx, "UniPonAniConfigFsm resetting", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})

	if oFsm.isChanSet() {
		// indicate processing error to the caller (in case there was still some open request)
		logger.Debugw(ctx, "UniPonAniConfigFsm processingError on channel", log.Fields{
			"ProcessingStep": oFsm.procStep, "from_State": e.FSM.Current(), "device-id": oFsm.deviceID})
		//use non-blocking channel send to avoid blocking because of non-existing receiver
		//  (even though the channel is checked on 'set', the outside receiver channel might (theoretically) already be deleted)
		select {
		case oFsm.chSuccess <- 0:
		default:
			logger.Debugw(ctx, "UniPonAniConfigFsm processingError not send on channel (no receiver)", log.Fields{
				"device-id": oFsm.deviceID})
		}
		oFsm.setChanSet(false) //reset the internal channel state
	}

	pConfigAniStateAFsm := oFsm.PAdaptFsm
	if pConfigAniStateAFsm != nil {
		// abort running message processing
		fsmAbortMsg := cmn.Message{
			Type: cmn.TestMsg,
			Data: cmn.TestMessage{
				TestMessageVal: cmn.AbortMessageProcessing,
			},
		}
		pConfigAniStateAFsm.CommChan <- fsmAbortMsg

		//try to restart the FSM to 'disabled', decouple event transfer
		go func(aPAFsm *cmn.AdapterFsm) {
			if aPAFsm != nil && aPAFsm.PFsm != nil {
				_ = aPAFsm.PFsm.Event(aniEvRestart)
			}
		}(pConfigAniStateAFsm)
		logger.Warnf(ctx, "calling  HandleAniConfigFSMFailure resetting", log.Fields{
			"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
		oFsm.pDeviceHandler.HandleAniConfigFSMFailure(ctx, oFsm.pOnuUniPort.UniID)
	}
}

//nolint:unparam
func (oFsm *UniPonAniConfigFsm) enterDisabledState(ctx context.Context, e *fsm.Event) {
	logger.Debugw(ctx, "UniPonAniConfigFsm enters disabled state", log.Fields{
		"device-id": oFsm.deviceID, "uni-id": oFsm.pOnuUniPort.UniID})
	oFsm.mutexPLastTxMeInstance.Lock()
	defer oFsm.mutexPLastTxMeInstance.Unlock()
	oFsm.pLastTxMeInstance = nil
}

func (oFsm *UniPonAniConfigFsm) processOmciAniMessages(ctx context.Context) {
	logger.Info(ctx, "Start UniPonAniConfigFsm Msg processing", log.Fields{"for device-id": oFsm.deviceID})
loop:
	for {
		// case <-ctx.Done():
		// 	logger.Info("MibSync Msg", log.Fields{"Message handling canceled via context for device-id": oFsm.deviceID})
		// 	break loop
		select {
		case message, ok := <-oFsm.PAdaptFsm.CommChan:
			if !ok {
				logger.Warn(ctx, "UniPonAniConfigFsm Rx Msg - could not read from channel", log.Fields{"device-id": oFsm.deviceID})
				// but then we have to ensure a restart of the FSM as well - as exceptional procedure
				_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				break loop
			}
			logger.Debugw(ctx, "UniPonAniConfigFsm Rx Msg", log.Fields{"device-id": oFsm.deviceID})

			switch message.Type {
			case cmn.TestMsg:
				msg, _ := message.Data.(cmn.TestMessage)
				if msg.TestMessageVal == cmn.AbortMessageProcessing {
					logger.Infow(ctx, "UniPonAniConfigFsm abort ProcessMsg", log.Fields{"for device-id": oFsm.deviceID})
					break loop
				}
				logger.Warnw(ctx, "UniPonAniConfigFsm unknown TestMessage", log.Fields{"device-id": oFsm.deviceID, "MessageVal": msg.TestMessageVal})
			case cmn.OMCI:
				msg, _ := message.Data.(cmn.OmciMessage)
				oFsm.handleOmciAniConfigMessage(ctx, msg)
			default:
				logger.Warn(ctx, "UniPonAniConfigFsm Rx unknown message", log.Fields{"device-id": oFsm.deviceID,
					"message.Type": message.Type})
			}
		case _, ok := <-oFsm.pDeviceHandler.GetDeviceDeleteCommChan(ctx):
			if !ok {
				logger.Warnw(ctx, "Device deletion channel closed", log.Fields{"device-id": oFsm.deviceID})
			}
			break loop
		}

	}
	logger.Infow(ctx, "End UniPonAniConfigFsm Msg processing", log.Fields{"device-id": oFsm.deviceID})
}

func (oFsm *UniPonAniConfigFsm) handleOmciAniConfigCreateResponseMessage(ctx context.Context, msg cmn.OmciMessage) {
	msgLayer := (*msg.OmciPacket).Layer(omci.LayerTypeCreateResponse)
	if msgLayer == nil {
		logger.Errorw(ctx, "Omci Msg layer could not be detected for CreateResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	msgObj, msgOk := msgLayer.(*omci.CreateResponse)
	if !msgOk {
		logger.Errorw(ctx, "Omci Msg layer could not be assigned for CreateResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	logger.Debugw(ctx, "CreateResponse Data", log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj})
	if msgObj.Result == me.Success || msgObj.Result == me.InstanceExists {
		//if the result is ok or Instance already exists (latest needed at least as long as we do not clear the OMCI techProfile data)
		oFsm.mutexPLastTxMeInstance.RLock()
		if oFsm.pLastTxMeInstance != nil {
			if msgObj.EntityClass == oFsm.pLastTxMeInstance.GetClassID() &&
				msgObj.EntityInstance == oFsm.pLastTxMeInstance.GetEntityID() {
				// maybe we can use just the same eventName for different state transitions like "forward"
				//   - might be checked, but so far I go for sure and have to inspect the concrete state events ...
				switch oFsm.pLastTxMeInstance.GetName() {
				case "Ieee8021PMapperServiceProfile":
					{ // let the FSM proceed ...
						oFsm.mutexPLastTxMeInstance.RUnlock()
						_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxDot1pmapCResp)
					}
				case "MacBridgePortConfigurationData":
					{ // let the FSM proceed ...
						oFsm.mutexPLastTxMeInstance.RUnlock()
						_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxMbpcdResp)
					}
				case "GemPortNetworkCtp", "GemInterworkingTerminationPoint", "MulticastGemInterworkingTerminationPoint":
					{ // let aniConfig Multi-Id processing proceed by stopping the wait function
						oFsm.mutexPLastTxMeInstance.RUnlock()
						oFsm.omciMIdsResponseReceived <- true
					}
				default:
					{
						oFsm.mutexPLastTxMeInstance.RUnlock()
						logger.Warnw(ctx, "Unsupported ME name received!",
							log.Fields{"ME name": oFsm.pLastTxMeInstance.GetName(), "device-id": oFsm.deviceID})
					}
				}
			} else {
				oFsm.mutexPLastTxMeInstance.RUnlock()
			}
		} else {
			oFsm.mutexPLastTxMeInstance.RUnlock()
			logger.Warnw(ctx, "Pointer to last Tx MeInstance is nil!", log.Fields{"device-id": oFsm.deviceID})
		}
	} else {
		logger.Errorw(ctx, "Omci CreateResponse Error - later: drive FSM to abort state ?",
			log.Fields{"Error": msgObj.Result, "device-id": oFsm.deviceID})
		// possibly force FSM into abort or ignore some errors for some messages?
		oFsm.pOmciCC.NotifyAboutOnuConfigFailure(ctx, cmn.OnuConfigFailureResponseErr, msgObj.EntityClass,
			msgObj.EntityInstance, msgObj.EntityClass.String(), msgObj.Result)
		return
	}
}
func (oFsm *UniPonAniConfigFsm) handleOmciAniConfigSetFailResponseMessage(ctx context.Context, msgObj *omci.SetResponse) {
	//If TCONT fails, then we need to revert the allocated TCONT in DB.
	//Because FSMs are running sequentially, we don't expect the same TCONT hit by another tech-profile FSM while this FSM is running.
	oFsm.mutexPLastTxMeInstance.RLock()
	defer oFsm.mutexPLastTxMeInstance.RUnlock()
	if oFsm.pLastTxMeInstance != nil && msgObj.EntityClass == oFsm.pLastTxMeInstance.GetClassID() &&
		msgObj.EntityInstance == oFsm.pLastTxMeInstance.GetEntityID() {
		switch oFsm.pLastTxMeInstance.GetName() {
		case "TCont":
			//If this is for TCONT creation(requestEventOffset=0) and this is the first allocation of TCONT(so noone else is using the same TCONT)
			//We should revert DB
			oFsm.pUniTechProf.mutexTPState.RLock()
			if oFsm.requestEventOffset == 0 && !oFsm.tcontSetBefore && oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey] != nil {
				logger.Debugw(ctx, "UniPonAniConfigFsm TCONT creation failed on device. Freeing alloc id", log.Fields{"device-id": oFsm.deviceID,
					"alloc-id": oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].tcontParams.allocID, "uni-tp": oFsm.uniTpKey})
				if oFsm.pOnuDeviceEntry != nil {
					oFsm.pOnuDeviceEntry.FreeTcont(ctx, oFsm.pUniTechProf.mapPonAniConfig[oFsm.uniTpKey].tcontParams.allocID)
				} else {
					logger.Warnw(ctx, "Unable to get device entry! couldn't free tcont",
						log.Fields{"ME name": oFsm.pLastTxMeInstance.GetName(), "device-id": oFsm.deviceID})
				}
			}
			oFsm.pUniTechProf.mutexTPState.RUnlock()
		default:
			logger.Warnw(ctx, "Unsupported ME name received with error!",
				log.Fields{"ME name": oFsm.pLastTxMeInstance.GetName(), "result": msgObj.Result, "device-id": oFsm.deviceID})
		}
	}
}
func (oFsm *UniPonAniConfigFsm) handleOmciAniConfigSetResponseMessage(ctx context.Context, msg cmn.OmciMessage) {
	msgLayer := (*msg.OmciPacket).Layer(omci.LayerTypeSetResponse)
	if msgLayer == nil {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci Msg layer could not be detected for SetResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	msgObj, msgOk := msgLayer.(*omci.SetResponse)
	if !msgOk {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci Msg layer could not be assigned for SetResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	logger.Debugw(ctx, "UniPonAniConfigFsm SetResponse Data", log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj})
	if msgObj.Result != me.Success {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci SetResponse Error - later: drive FSM to abort state ?",
			log.Fields{"device-id": oFsm.deviceID, "Error": msgObj.Result})
		// possibly force FSM into abort or ignore some errors for some messages?
		oFsm.pOmciCC.NotifyAboutOnuConfigFailure(ctx, cmn.OnuConfigFailureResponseErr, msgObj.EntityClass,
			msgObj.EntityInstance, msgObj.EntityClass.String(), msgObj.Result)
		oFsm.handleOmciAniConfigSetFailResponseMessage(ctx, msgObj)
		return
	}
	oFsm.mutexPLastTxMeInstance.RLock()
	if oFsm.pLastTxMeInstance != nil {
		if msgObj.EntityClass == oFsm.pLastTxMeInstance.GetClassID() &&
			msgObj.EntityInstance == oFsm.pLastTxMeInstance.GetEntityID() {
			//store the created ME into DB //TODO??? obviously the Python code does not store the config ...
			// if, then something like:
			//oFsm.pOnuDB.StoreMe(msgObj)

			switch oFsm.pLastTxMeInstance.GetName() {
			case "TCont":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					if oFsm.requestEventOffset == 0 { //from TCont config request
						_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxTcontsResp)
					} else { // from T-Cont reset request
						_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxResetTcontResp)
					}
				}
			case "PriorityQueue", "MulticastGemInterworkingTerminationPoint":
				{ // let the PrioQueue init proceed by stopping the wait function
					oFsm.mutexPLastTxMeInstance.RUnlock()
					oFsm.omciMIdsResponseReceived <- true
				}
			case "Ieee8021PMapperServiceProfile":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxDot1pmapSResp)
				}
			default:
				{
					oFsm.mutexPLastTxMeInstance.RUnlock()
					logger.Warnw(ctx, "Unsupported ME name received!",
						log.Fields{"ME name": oFsm.pLastTxMeInstance.GetName(), "device-id": oFsm.deviceID})
				}
			}
		} else {
			oFsm.mutexPLastTxMeInstance.RUnlock()
		}
	} else {
		oFsm.mutexPLastTxMeInstance.RUnlock()
		logger.Warnw(ctx, "Pointer to last Tx MeInstance is nil!", log.Fields{"device-id": oFsm.deviceID})
	}
}

func (oFsm *UniPonAniConfigFsm) handleOmciAniConfigDeleteResponseMessage(ctx context.Context, msg cmn.OmciMessage) {
	msgLayer := (*msg.OmciPacket).Layer(omci.LayerTypeDeleteResponse)
	if msgLayer == nil {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci Msg layer could not be detected for DeleteResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	msgObj, msgOk := msgLayer.(*omci.DeleteResponse)
	if !msgOk {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci Msg layer could not be assigned for DeleteResponse",
			log.Fields{"device-id": oFsm.deviceID})
		return
	}
	logger.Debugw(ctx, "UniPonAniConfigFsm DeleteResponse Data", log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj})
	if msgObj.Result == me.UnknownInstance {
		logger.Warnw(ctx, "UniPonAniConfigFsm - Unknow Instance",
			log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj, "Error": msgObj.Result})
	} else if msgObj.Result != me.Success {
		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci DeleteResponse Error",
			log.Fields{"device-id": oFsm.deviceID, "Error": msgObj.Result})
		//TODO:  - later: possibly force FSM into abort or ignore some errors for some messages?
		oFsm.pOmciCC.NotifyAboutOnuConfigFailure(ctx, cmn.OnuConfigFailureResponseErr, msgObj.EntityClass,
			msgObj.EntityInstance, msgObj.EntityClass.String(), msgObj.Result)
		return
	}
	oFsm.mutexPLastTxMeInstance.RLock()
	if oFsm.pLastTxMeInstance != nil {
		if msgObj.EntityClass == oFsm.pLastTxMeInstance.GetClassID() &&
			msgObj.EntityInstance == oFsm.pLastTxMeInstance.GetEntityID() {
			//remove ME from DB //TODO??? obviously the Python code does not store/remove the config ...
			// if, then something like: oFsm.pOnuDB.XyyMe(msgObj)

			switch oFsm.pLastTxMeInstance.GetName() {
			case "GemInterworkingTerminationPoint":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxRemGemiwResp)
				}
			case "GemPortNetworkCtp":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxRemGemntpResp)
				}
			case "TrafficDescriptor":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxRemTdResp)
				}
			case "Ieee8021PMapperServiceProfile":
				{ // let the FSM proceed ...
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxRem1pMapperResp)
				}
			case "MacBridgePortConfigurationData":
				{ // this is the last event of the T-Cont cleanup procedure, FSM may be reset here
					oFsm.mutexPLastTxMeInstance.RUnlock()
					_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxRemAniBPCDResp)
				}
			default:
				{
					oFsm.mutexPLastTxMeInstance.RUnlock()
					logger.Warnw(ctx, "Unsupported ME name received!",
						log.Fields{"ME name": oFsm.pLastTxMeInstance.GetName(), "device-id": oFsm.deviceID})
				}
			}
		} else {
			oFsm.mutexPLastTxMeInstance.RUnlock()
		}
	} else {
		oFsm.mutexPLastTxMeInstance.RUnlock()
		logger.Warnw(ctx, "Pointer to last Tx MeInstance is nil!", log.Fields{"device-id": oFsm.deviceID})
	}
}

func (oFsm *UniPonAniConfigFsm) handleOmciAniConfigMessage(ctx context.Context, msg cmn.OmciMessage) {
	logger.Debugw(ctx, "Rx OMCI UniPonAniConfigFsm Msg", log.Fields{"device-id": oFsm.deviceID,
		"msgType": msg.OmciMsg.MessageType})

	switch msg.OmciMsg.MessageType {
	case omci.CreateResponseType:
		{
			oFsm.handleOmciAniConfigCreateResponseMessage(ctx, msg)

		} //CreateResponseType
	case omci.SetResponseType:
		{
			oFsm.handleOmciAniConfigSetResponseMessage(ctx, msg)

		} //SetResponseType
	case omci.DeleteResponseType:
		{
			oFsm.handleOmciAniConfigDeleteResponseMessage(ctx, msg)

		} //DeleteResponseType
	default:
		{
			logger.Errorw(ctx, "UniPonAniConfigFsm - Rx OMCI unhandled MsgType",
				log.Fields{"omciMsgType": msg.OmciMsg.MessageType, "device-id": oFsm.deviceID})
			return
		}
	}
}

func (oFsm *UniPonAniConfigFsm) performCreatingGemNCTPs(ctx context.Context) {
	// for all GemPorts of this T-Cont as given by the size of set gemPortAttribsSlice
	for gemIndex, gemPortAttribs := range oFsm.gemPortAttribsSlice {
		logger.Info(ctx, "UniPonAniConfigFsm Tx Create::GemNWCtp", log.Fields{
			"EntitytId": strconv.FormatInt(int64(gemPortAttribs.gemPortID), 16),
			"TcontId":   strconv.FormatInt(int64(oFsm.tcont0ID), 16),
			"device-id": oFsm.deviceID})
		meParams := me.ParamData{
			EntityID: gemPortAttribs.gemPortID, //unique, same as PortId
			Attributes: me.AttributeValueMap{
				me.GemPortNetworkCtp_PortId:       gemPortAttribs.gemPortID,
				me.GemPortNetworkCtp_TContPointer: oFsm.tcont0ID,
				me.GemPortNetworkCtp_Direction:    gemPortAttribs.direction,
				//ONU-G.TrafficManagementOption dependency ->PrioQueue or TCont
				//  TODO!! verify dependency and QueueId in case of Multi-GemPort setup!
				me.GemPortNetworkCtp_TrafficManagementPointerForUpstream: gemPortAttribs.upQueueID, //might be different in wrr-only Setup - tcont0ID
				me.GemPortNetworkCtp_PriorityQueuePointerForDownStream:   gemPortAttribs.downQueueID,
			},
		}
		if oFsm.techProfileType == cTechProfileTypeXgsPon {
			meParams.Attributes[me.GemPortNetworkCtp_EncryptionKeyRing] = GemEncryptKeyRingUnicastDownstreamOnly
		}
		oFsm.mutexPLastTxMeInstance.Lock()
		meInstance, err := oFsm.pOmciCC.SendCreateGemNCTPVar(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
			oFsm.PAdaptFsm.CommChan, meParams)
		if err != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			logger.Errorw(ctx, "GemNCTPVar create failed, aborting UniPonAniConfigFsm!",
				log.Fields{"device-id": oFsm.deviceID})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}
		//accept also nil as (error) return value for writing to LastTx
		//  - this avoids misinterpretation of new received OMCI messages
		oFsm.pLastTxMeInstance = meInstance
		oFsm.mutexPLastTxMeInstance.Unlock()
		//verify response
		err = oFsm.waitforOmciResponse(ctx)
		if err != nil {
			logger.Errorw(ctx, "GemNWCtp create failed, aborting AniConfig FSM!",
				log.Fields{"device-id": oFsm.deviceID, "GemIndex": gemIndex})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}
		oFsm.pOnuDB.PutOnuSpeficMe(ctx, me.GemPortNetworkCtpClassID, gemPortAttribs.gemPortID, meParams.Attributes)
		// Mark the gem port to be added for Performance History monitoring
		OnuMetricsManager := oFsm.pDeviceHandler.GetOnuMetricsManager()
		if OnuMetricsManager != nil {
			OnuMetricsManager.AddGemPortForPerfMonitoring(ctx, gemPortAttribs.gemPortID)
		}
	} //for all GemPorts of this T-Cont

	// if Config has been done for all GemPort instances let the FSM proceed
	logger.Debugw(ctx, "GemNWCtp create loop finished", log.Fields{"device-id": oFsm.deviceID})
	_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxGemntcpsResp)
}
func (oFsm *UniPonAniConfigFsm) hasMulticastGem(ctx context.Context) bool {
	for _, gemPortAttribs := range oFsm.gemPortAttribsSlice {
		if gemPortAttribs.isMulticast {
			logger.Debugw(ctx, "Found multicast gem", log.Fields{"device-id": oFsm.deviceID})
			return true
		}
	}
	return false
}

func (oFsm *UniPonAniConfigFsm) performCreatingGemIWs(ctx context.Context) {
	// for all GemPorts of this T-Cont as given by the size of set gemPortAttribsSlice
	for gemIndex, gemPortAttribs := range oFsm.gemPortAttribsSlice {
		logger.Info(ctx, "UniPonAniConfigFsm Tx Create::GemIwTp", log.Fields{
			"EntitytId": strconv.FormatInt(int64(gemPortAttribs.gemPortID), 16),
			"SPPtr":     strconv.FormatInt(int64(oFsm.mapperSP0ID), 16),
			"device-id": oFsm.deviceID})

		var meParams me.ParamData
		//TODO if the port has only downstream direction the isMulticast flag can be removed.
		if gemPortAttribs.isMulticast {

			meParams = me.ParamData{
				EntityID: gemPortAttribs.multicastGemID,
				Attributes: me.AttributeValueMap{
					me.MulticastGemInterworkingTerminationPoint_GemPortNetworkCtpConnectivityPointer: gemPortAttribs.multicastGemID,
					me.MulticastGemInterworkingTerminationPoint_InterworkingOption:                   0, // Don't Care
					me.MulticastGemInterworkingTerminationPoint_ServiceProfilePointer:                0, // Don't Care
					me.MulticastGemInterworkingTerminationPoint_GalProfilePointer:                    cmn.GalEthernetEID,
				},
			}
			if oFsm.pUniTechProf.multicastConfiguredForOtherUniTps(ctx, oFsm.uniTpKey) {
				logger.Debugw(ctx, "MulticastGemInterworkingTP already exist", log.Fields{"device-id": oFsm.deviceID, "multicast-gem-id": gemPortAttribs.multicastGemID})
				continue
			}
			oFsm.mutexPLastTxMeInstance.Lock()
			meInstance, err := oFsm.pOmciCC.SendCreateMulticastGemIWTPVar(context.TODO(), oFsm.pDeviceHandler.GetOmciTimeout(),
				true, oFsm.PAdaptFsm.CommChan, meParams)
			if err != nil {
				oFsm.mutexPLastTxMeInstance.Unlock()
				logger.Errorw(ctx, "MulticastGemIWTPVar create failed, aborting UniPonAniConfigFsm!",
					log.Fields{"device-id": oFsm.deviceID})
				_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				return

			}
			oFsm.pLastTxMeInstance = meInstance
			oFsm.mutexPLastTxMeInstance.Unlock()
			//verify response
			err = oFsm.waitforOmciResponse(ctx)
			if err != nil {
				logger.Errorw(ctx, "MulticastGemIWTP create failed, aborting AniConfig FSM!",
					log.Fields{"device-id": oFsm.deviceID, "GemIndex": gemIndex})
				_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				return
			}
			ipv4MulticastTable := make([]uint8, 12)
			//Gem Port ID
			binary.BigEndian.PutUint16(ipv4MulticastTable[0:], gemPortAttribs.multicastGemID)
			//Secondary Key
			binary.BigEndian.PutUint16(ipv4MulticastTable[2:], 0)
			// Multicast IP range start This is the 224.0.0.1 address
			binary.BigEndian.PutUint32(ipv4MulticastTable[4:], cmn.IPToInt32(net.IPv4(224, 0, 0, 0)))
			// MulticastIp range stop
			binary.BigEndian.PutUint32(ipv4MulticastTable[8:], cmn.IPToInt32(net.IPv4(239, 255, 255, 255)))

			meIPV4MCTableParams := me.ParamData{
				EntityID: gemPortAttribs.multicastGemID,
				Attributes: me.AttributeValueMap{
					me.MulticastGemInterworkingTerminationPoint_Ipv4MulticastAddressTable: ipv4MulticastTable,
				},
			}
			oFsm.mutexPLastTxMeInstance.Lock()
			meIPV4MCTableInstance, err := oFsm.pOmciCC.SendSetMulticastGemIWTPVar(context.TODO(), oFsm.pDeviceHandler.GetOmciTimeout(),
				true, oFsm.PAdaptFsm.CommChan, meIPV4MCTableParams)
			if err != nil {
				oFsm.mutexPLastTxMeInstance.Unlock()
				logger.Errorw(ctx, "MulticastGemIWTPVar set failed, aborting UniPonAniConfigFsm!",
					log.Fields{"device-id": oFsm.deviceID})
				_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				return
			}
			oFsm.pLastTxMeInstance = meIPV4MCTableInstance
			oFsm.mutexPLastTxMeInstance.Unlock()

		} else {
			meParams = me.ParamData{
				EntityID: gemPortAttribs.gemPortID,
				Attributes: me.AttributeValueMap{
					me.GemInterworkingTerminationPoint_GemPortNetworkCtpConnectivityPointer: gemPortAttribs.gemPortID, //same as EntityID, see above
					me.GemInterworkingTerminationPoint_InterworkingOption:                   5,                        //fixed model:: G.998 .1pMapper
					me.GemInterworkingTerminationPoint_ServiceProfilePointer:                oFsm.mapperSP0ID,
					me.GemInterworkingTerminationPoint_InterworkingTerminationPointPointer:  0, //not used with .1PMapper Mac bridge
					me.GemInterworkingTerminationPoint_GalProfilePointer:                    cmn.GalEthernetEID,
				},
			}
			oFsm.mutexPLastTxMeInstance.Lock()
			meInstance, err := oFsm.pOmciCC.SendCreateGemIWTPVar(context.TODO(), oFsm.pDeviceHandler.GetOmciTimeout(), true,
				oFsm.PAdaptFsm.CommChan, meParams)
			if err != nil {
				oFsm.mutexPLastTxMeInstance.Unlock()
				logger.Errorw(ctx, "GEMIWTPVar create failed, aborting UniPonAniConfigFsm!",
					log.Fields{"device-id": oFsm.deviceID})
				_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
				return
			}
			//accept also nil as (error) return value for writing to LastTx
			//  - this avoids misinterpretation of new received OMCI messages
			oFsm.pLastTxMeInstance = meInstance
			oFsm.mutexPLastTxMeInstance.Unlock()
		}
		//verify response
		err := oFsm.waitforOmciResponse(ctx)
		if err != nil {
			logger.Errorw(ctx, "GemTP create failed, aborting AniConfig FSM!",
				log.Fields{"device-id": oFsm.deviceID, "GemIndex": gemIndex})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}
		logger.Infow(ctx, "Adding GemIWTP to the ONU DB ", log.Fields{"device-id": oFsm.deviceID, "GEMID": gemPortAttribs.gemPortID})
		oFsm.pOnuDB.PutOnuSpeficMe(ctx, me.GemInterworkingTerminationPointClassID, gemPortAttribs.gemPortID, meParams.Attributes)

	} //for all GemPort's of this T-Cont

	// if Config has been done for all GemPort instances let the FSM proceed
	logger.Debugw(ctx, "GemIwTp create loop finished", log.Fields{"device-id": oFsm.deviceID})
	_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxGemiwsResp)
}

func (oFsm *UniPonAniConfigFsm) performSettingPQs(ctx context.Context) {
	//If upstream PQs were set before, then no need to set them again. Let state machine to proceed.
	if oFsm.tcontSetBefore {
		logger.Debugw(ctx, "No need to set PQs again.", log.Fields{
			"device-id": oFsm.deviceID, "tcont": oFsm.alloc0ID,
			"uni-id":         oFsm.pOnuUniPort.UniID,
			"techProfile-id": oFsm.techProfileID})
		go func(aPAFsm *cmn.AdapterFsm) {
			if aPAFsm != nil && aPAFsm.PFsm != nil {
				_ = aPAFsm.PFsm.Event(aniEvRxPrioqsResp)
			}
		}(oFsm.PAdaptFsm)
		return
	}
	const cu16StrictPrioWeight uint16 = 0xFFFF
	//find all upstream PrioQueues related to this T-Cont
	loQueueMap := ordered_map.NewOrderedMap()
	for _, gemPortAttribs := range oFsm.gemPortAttribsSlice {
		if gemPortAttribs.isMulticast {
			logger.Debugw(ctx, "UniPonAniConfigFsm Port is Multicast, ignoring PQs", log.Fields{
				"device-id": oFsm.deviceID, "GemPort": gemPortAttribs.gemPortID,
				"prioString": gemPortAttribs.pbitString})
			continue
		}
		if gemPortAttribs.qosPolicy == "WRR" {
			if _, ok := loQueueMap.Get(gemPortAttribs.upQueueID); !ok {
				//key does not yet exist
				loQueueMap.Set(gemPortAttribs.upQueueID, uint16(gemPortAttribs.weight))
			}
		} else {
			loQueueMap.Set(gemPortAttribs.upQueueID, cu16StrictPrioWeight) //use invalid weight value to indicate SP
		}
	}

	trafficSchedPtrSetSupported := false
	loOnu2g := oFsm.pOnuDB.GetMe(me.Onu2GClassID, cmn.Onu2gMeID)
	if loOnu2g == nil {
		logger.Errorw(ctx, "onu2g is nil, cannot read qos configuration flexibility parameter",
			log.Fields{"device-id": oFsm.deviceID})
		_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
		return
	}
	returnVal := loOnu2g["QualityOfServiceQosConfigurationFlexibility"]
	if returnVal != nil {
		if qosCfgFlexParam, err := oFsm.pOnuDB.GetUint16Attrib(returnVal); err == nil {
			trafficSchedPtrSetSupported = qosCfgFlexParam&bitTrafficSchedulerPtrSetPermitted == bitTrafficSchedulerPtrSetPermitted
			logger.Debugw(ctx, "trafficSchedPtrSetSupported set",
				log.Fields{"qosCfgFlexParam": qosCfgFlexParam, "trafficSchedPtrSetSupported": trafficSchedPtrSetSupported})
		} else {
			logger.Errorw(ctx, "Cannot extract qos configuration flexibility parameter",
				log.Fields{"device-id": oFsm.deviceID})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}
	} else {
		logger.Errorw(ctx, "Cannot read qos configuration flexibility parameter",
			log.Fields{"device-id": oFsm.deviceID})
		_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
		return
	}

	//TODO: assumption here is that ONU data uses SP setting in the T-Cont and WRR in the TrafficScheduler
	//  if that is not the case, the reverse case could be checked and reacted accordingly or if the
	//  complete chain is not valid, then some error should be thrown and configuration can be aborted
	//  or even be finished without correct SP/WRR setting

	//TODO: search for the (WRR)trafficScheduler related to the T-Cont of this queue
	//By now assume fixed value 0x8000, which is the only announce BBSIM TrafficScheduler,
	//  even though its T-Cont seems to be wrong ...
	loTrafficSchedulerEID := 0x8000
	//for all found queues
	iter := loQueueMap.IterFunc()
	for kv, ok := iter(); ok; kv, ok = iter() {
		queueIndex := (kv.Key).(uint16)
		meParams := me.ParamData{
			EntityID:   queueIndex,
			Attributes: make(me.AttributeValueMap),
		}
		if trafficSchedPtrSetSupported {
			if (kv.Value).(uint16) == cu16StrictPrioWeight {
				//StrictPrio indication
				logger.Debugw(ctx, "uniPonAniConfigFsm Tx Set::PrioQueue to StrictPrio", log.Fields{
					"EntitytId": strconv.FormatInt(int64(queueIndex), 16),
					"device-id": oFsm.deviceID})
				meParams.Attributes[me.PriorityQueue_TrafficSchedulerPointer] = 0 //ensure T-Cont defined StrictPrio scheduling
			} else {
				//WRR indication
				logger.Debugw(ctx, "uniPonAniConfigFsm Tx Set::PrioQueue to WRR", log.Fields{
					"EntitytId": strconv.FormatInt(int64(queueIndex), 16),
					"Weight":    kv.Value,
					"device-id": oFsm.deviceID})
				meParams.Attributes[me.PriorityQueue_TrafficSchedulerPointer] = loTrafficSchedulerEID //ensure assignment of the relevant trafficScheduler
				meParams.Attributes[me.PriorityQueue_Weight] = uint8(kv.Value.(uint16))
			}
		} else {
			// setting Traffic Scheduler (TS) pointer is not supported unless we point to another TS that points to the same TCONT.
			// For now lets use TS that is hardwired in the ONU and just update the weight in case of WRR, which in fact is all we need at the moment.
			// The code could get unnecessarily convoluted if we provide the flexibility try to find and point to another TS that points to the same TCONT.
			if (kv.Value).(uint16) == cu16StrictPrioWeight { // SP case, nothing to be done. Proceed to the next queue
				logger.Debugw(ctx, "uniPonAniConfigFsm Tx Set::PrioQueue to StrictPrio, traffic sched ptr set unsupported", log.Fields{
					"EntitytId": strconv.FormatInt(int64(queueIndex), 16),
					"device-id": oFsm.deviceID})
				continue
			}
			// WRR case, update weight.
			logger.Debugw(ctx, "uniPonAniConfigFsm Tx Set::PrioQueue to WRR, traffic sched ptr set unsupported", log.Fields{
				"EntitytId": strconv.FormatInt(int64(queueIndex), 16),
				"Weight":    kv.Value,
				"device-id": oFsm.deviceID})
			meParams.Attributes[me.PriorityQueue_Weight] = uint8(kv.Value.(uint16))
		}
		oFsm.mutexPLastTxMeInstance.Lock()
		meInstance, err := oFsm.pOmciCC.SendSetPrioQueueVar(log.WithSpanFromContext(context.TODO(), ctx), oFsm.pDeviceHandler.GetOmciTimeout(), true,
			oFsm.PAdaptFsm.CommChan, meParams)
		if err != nil {
			oFsm.mutexPLastTxMeInstance.Unlock()
			logger.Errorw(ctx, "PrioQueueVar set failed, aborting UniPonAniConfigFsm!",
				log.Fields{"device-id": oFsm.deviceID})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}
		//accept also nil as (error) return value for writing to LastTx
		//  - this avoids misinterpretation of new received OMCI messages
		oFsm.pLastTxMeInstance = meInstance
		oFsm.mutexPLastTxMeInstance.Unlock()

		//verify response
		err = oFsm.waitforOmciResponse(ctx)
		if err != nil {
			logger.Errorw(ctx, "PrioQueue set failed, aborting AniConfig FSM!",
				log.Fields{"device-id": oFsm.deviceID, "QueueId": strconv.FormatInt(int64(queueIndex), 16)})
			_ = oFsm.PAdaptFsm.PFsm.Event(aniEvReset)
			return
		}

		//TODO: In case of WRR setting of the GemPort/PrioQueue it might further be necessary to
		//  write the assigned trafficScheduler with the requested Prio to be considered in the StrictPrio scheduling
		//  of the (next upstream) assigned T-Cont, which is f(prioQueue[priority]) - in relation to other SP prioQueues
		//  not yet done because of BBSIM TrafficScheduler issues (and not done in py code as well)

	} //for all upstream prioQueues

	// if Config has been done for all PrioQueue instances let the FSM proceed
	logger.Debugw(ctx, "PrioQueue set loop finished", log.Fields{"device-id": oFsm.deviceID})
	_ = oFsm.PAdaptFsm.PFsm.Event(aniEvRxPrioqsResp)
}

func (oFsm *UniPonAniConfigFsm) waitforOmciResponse(ctx context.Context) error {
	oFsm.mutexIsAwaitingResponse.Lock()
	if oFsm.isCanceled {
		// FSM already canceled before entering wait
		logger.Debugw(ctx, "UniPonAniConfigFsm wait-for-multi-entity-response aborted (on enter)", log.Fields{"for device-id": oFsm.deviceID})
		oFsm.mutexIsAwaitingResponse.Unlock()
		return fmt.Errorf(cmn.CErrWaitAborted)
	}
	oFsm.isAwaitingResponse = true
	oFsm.mutexIsAwaitingResponse.Unlock()
	select {
	// maybe be also some outside cancel (but no context modeled for the moment ...)
	// case <-ctx.Done():
	// 		logger.Infow("LockState-bridge-init message reception canceled", log.Fields{"for device-id": oFsm.deviceID})
	case <-time.After(oFsm.pOmciCC.GetMaxOmciTimeoutWithRetries() * time.Second): //3s was detected to be to less in 8*8 bbsim test with debug Info/Debug
		logger.Warnw(ctx, "UniPonAniConfigFsm multi entity timeout", log.Fields{"for device-id": oFsm.deviceID})
		oFsm.mutexIsAwaitingResponse.Lock()
		oFsm.isAwaitingResponse = false
		oFsm.mutexIsAwaitingResponse.Unlock()
		oFsm.mutexPLastTxMeInstance.RLock()
		if oFsm.pLastTxMeInstance != nil {
			oFsm.pOmciCC.NotifyAboutOnuConfigFailure(ctx, cmn.OnuConfigFailureTimeout, oFsm.pLastTxMeInstance.GetClassID(),
				oFsm.pLastTxMeInstance.GetEntityID(), oFsm.pLastTxMeInstance.GetClassID().String(), 0)
		}
		oFsm.mutexPLastTxMeInstance.RUnlock()
		return fmt.Errorf("uniPonAniConfigFsm multi entity timeout %s", oFsm.deviceID)
	case success := <-oFsm.omciMIdsResponseReceived:
		if success {
			logger.Debugw(ctx, "UniPonAniConfigFsm multi entity response received", log.Fields{"for device-id": oFsm.deviceID})
			oFsm.mutexIsAwaitingResponse.Lock()
			oFsm.isAwaitingResponse = false
			oFsm.mutexIsAwaitingResponse.Unlock()
			return nil
		}
		// waiting was aborted (probably on external request)
		logger.Debugw(ctx, "UniPonAniConfigFsm wait-for-multi-entity-response aborted", log.Fields{"for device-id": oFsm.deviceID})
		oFsm.mutexIsAwaitingResponse.Lock()
		oFsm.isAwaitingResponse = false
		oFsm.mutexIsAwaitingResponse.Unlock()
		return fmt.Errorf(cmn.CErrWaitAborted)
	}
}

func (oFsm *UniPonAniConfigFsm) setChanSet(flagValue bool) {
	oFsm.mutexChanSet.Lock()
	oFsm.chanSet = flagValue
	oFsm.mutexChanSet.Unlock()
}

func (oFsm *UniPonAniConfigFsm) isChanSet() bool {
	oFsm.mutexChanSet.RLock()
	flagValue := oFsm.chanSet
	oFsm.mutexChanSet.RUnlock()
	return flagValue
}

// PrepareForGarbageCollection - remove references to prepare for garbage collection
func (oFsm *UniPonAniConfigFsm) PrepareForGarbageCollection(ctx context.Context, aDeviceID string) {
	logger.Info(ctx, "prepare for garbage collection", log.Fields{"device-id": oFsm.deviceID})
	oFsm.pDeviceHandler = nil
	oFsm.pOnuDeviceEntry = nil
	oFsm.pOmciCC = nil
}