/*
 * Copyright 2018-present Open Networking Foundation

 * 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 adaptercore provides the utility for olt devices, flows and statistics
package adaptercore

import (
	"testing"

	"github.com/opencord/voltha-protos/go/voltha"

	"github.com/opencord/voltha-go/common/log"
	tp "github.com/opencord/voltha-go/common/techprofile"
	"github.com/opencord/voltha-go/db/model"
	fu "github.com/opencord/voltha-go/rw_core/utils"
	"github.com/opencord/voltha-openolt-adapter/adaptercore/resourcemanager"
	rsrcMgr "github.com/opencord/voltha-openolt-adapter/adaptercore/resourcemanager"
	"github.com/opencord/voltha-openolt-adapter/mocks"
	ofp "github.com/opencord/voltha-protos/go/openflow_13"
	"github.com/opencord/voltha-protos/go/openolt"
	openoltpb2 "github.com/opencord/voltha-protos/go/openolt"
	tp_pb "github.com/opencord/voltha-protos/go/tech_profile"
)

var flowMgr *OpenOltFlowMgr

func init() {
	log.SetDefaultLogger(log.JSON, log.DebugLevel, nil)
	flowMgr = newMockFlowmgr()
}
func newMockResourceMgr() *resourcemanager.OpenOltResourceMgr {
	ranges := []*openolt.DeviceInfo_DeviceResourceRanges{
		{IntfIds: []uint32{0, 1, 2}}}

	deviceinfo := &openolt.DeviceInfo{Vendor: "openolt", Model: "openolt", HardwareVersion: "1.0", FirmwareVersion: "1.0",
		DeviceId: "olt", DeviceSerialNumber: "openolt", PonPorts: 3, Technology: "Default",
		OnuIdStart: 1, OnuIdEnd: 1, AllocIdStart: 1, AllocIdEnd: 1,
		GemportIdStart: 1, GemportIdEnd: 1, FlowIdStart: 1, FlowIdEnd: 1,
		Ranges: ranges,
	}
	rsrMgr := resourcemanager.NewResourceMgr("olt", "127.0.0.1:2379", "etcd", "olt", deviceinfo)
	for key := range rsrMgr.ResourceMgrs {
		rsrMgr.ResourceMgrs[key].KVStore = &model.Backend{}
		rsrMgr.ResourceMgrs[key].KVStore.Client = &mocks.MockKVClient{}
		rsrMgr.ResourceMgrs[key].TechProfileMgr = mocks.MockTechProfile{TpID: key}
	}
	return rsrMgr
}

func newMockFlowmgr() *OpenOltFlowMgr {
	rsrMgr := newMockResourceMgr()
	dh := newMockDeviceHandler()

	rsrMgr.KVStore = &model.Backend{}
	rsrMgr.KVStore.Client = &mocks.MockKVClient{}

	dh.resourceMgr = rsrMgr
	flwMgr := NewFlowManager(dh, rsrMgr)
	onuIds := make(map[onuIDKey]onuInfo)
	onuIds[onuIDKey{intfID: 1, onuID: 1}] = onuInfo{intfID: 1, onuID: 1, serialNumber: "1"}
	onuIds[onuIDKey{intfID: 2, onuID: 2}] = onuInfo{intfID: 2, onuID: 2, serialNumber: "2"}
	flwMgr.onuIds = onuIds

	onuSerialNumbers := make(map[string]onuInfo)
	onuSerialNumbers["1"] = onuInfo{intfID: 1, onuID: 1, serialNumber: "1"}
	onuSerialNumbers["2"] = onuInfo{intfID: 2, onuID: 1, serialNumber: "2"}
	flwMgr.onuSerialNumbers = onuSerialNumbers

	onuGemPortIds := make(map[gemPortKey]onuInfo)
	onuGemPortIds[gemPortKey{intfID: 1, gemPort: 1}] = onuInfo{intfID: 1, onuID: 1, serialNumber: "1"}
	onuGemPortIds[gemPortKey{intfID: 2, gemPort: 2}] = onuInfo{intfID: 2, onuID: 2, serialNumber: "2"}
	flwMgr.onuGemPortIds = onuGemPortIds

	packetInGemPort := make(map[packetInInfoKey]uint32)
	packetInGemPort[packetInInfoKey{intfID: 1, onuID: 1, logicalPort: 1}] = 1
	packetInGemPort[packetInInfoKey{intfID: 2, onuID: 2, logicalPort: 2}] = 2

	flwMgr.packetInGemPort = packetInGemPort
	tps := make([]tp.TechProfileIf, len(rsrMgr.ResourceMgrs))
	for key := range rsrMgr.ResourceMgrs {
		tps[key] = mocks.MockTechProfile{TpID: key}
	}
	flwMgr.techprofile = tps
	return flwMgr
}

func TestOpenOltFlowMgr_CreateSchedulerQueues(t *testing.T) {
	// flowMgr := newMockFlowmgr()

	tprofile := &tp.TechProfile{Name: "tp1", SubscriberIdentifier: "subscriber1",
		ProfileType: "pt1", NumGemPorts: 1, NumTconts: 1, Version: 1,
		InstanceCtrl: tp.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
	}
	tprofile.UsScheduler.Direction = "UPSTREAM"
	tprofile.UsScheduler.AdditionalBw = "AdditionalBW_None"
	tprofile.UsScheduler.QSchedPolicy = "WRR"

	tprofile2 := tprofile
	tprofile2.DsScheduler.Direction = "DOWNSTREAM"
	tprofile2.DsScheduler.AdditionalBw = "AdditionalBW_None"
	tprofile2.DsScheduler.QSchedPolicy = "WRR"
	bands := make([]*ofp.OfpMeterBandHeader, 2)
	bands[0] = &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 1000, BurstSize: 5000, Data: &ofp.OfpMeterBandHeader_Drop{}}
	bands[1] = &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 2000, BurstSize: 5000, Data: &ofp.OfpMeterBandHeader_Drop{}}
	ofpMeterConfig := &ofp.OfpMeterConfig{Flags: 1, MeterId: 1, Bands: bands}
	flowmetadata := &voltha.FlowMetadata{
		Meters: []*ofp.OfpMeterConfig{ofpMeterConfig},
	}
	type args struct {
		Dir          tp_pb.Direction
		IntfID       uint32
		OnuID        uint32
		UniID        uint32
		UniPort      uint32
		TpInst       *tp.TechProfile
		MeterID      uint32
		flowMetadata *voltha.FlowMetadata
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		// TODO: Add test cases.
		{"CreateSchedulerQueues-1", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile, MeterID: 1, flowMetadata: flowmetadata}, false},
		{"CreateSchedulerQueues-2", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 1, flowMetadata: flowmetadata}, false},
		{"CreateSchedulerQueues-3", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile, MeterID: 2, flowMetadata: flowmetadata}, true},
		{"CreateSchedulerQueues-4", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 2, flowMetadata: flowmetadata}, true},
		{"CreateSchedulerQueues-5", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 2, OnuID: 2, UniID: 2, UniPort: 2, TpInst: tprofile, MeterID: 2, flowMetadata: flowmetadata}, true},
		{"CreateSchedulerQueues-6", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 2, OnuID: 2, UniID: 2, UniPort: 2, TpInst: tprofile2, MeterID: 2, flowMetadata: flowmetadata}, true},
		{"CreateSchedulerQueues-13", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 1, flowMetadata: flowmetadata}, false},
		//Negative testcases
		{"CreateSchedulerQueues-7", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile, MeterID: 1, flowMetadata: &voltha.FlowMetadata{}}, true},
		{"CreateSchedulerQueues-8", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile, MeterID: 0, flowMetadata: &voltha.FlowMetadata{}}, true},
		{"CreateSchedulerQueues-9", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 1, flowMetadata: &voltha.FlowMetadata{}}, false},
		{"CreateSchedulerQueues-10", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile, MeterID: 2, flowMetadata: &voltha.FlowMetadata{}}, true},
		{"CreateSchedulerQueues-11", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 2, flowMetadata: &voltha.FlowMetadata{}}, true},
		{"CreateSchedulerQueues-12", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2, MeterID: 2}, true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := flowMgr.CreateSchedulerQueues(tt.args.Dir, tt.args.IntfID, tt.args.OnuID, tt.args.UniID, tt.args.UniPort, tt.args.TpInst, tt.args.MeterID, tt.args.flowMetadata); (err != nil) != tt.wantErr {
				t.Errorf("OpenOltFlowMgr.CreateSchedulerQueues() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

func TestOpenOltFlowMgr_RemoveSchedulerQueues(t *testing.T) {

	// flowMgr := newMockFlowmgr()
	tprofile := &tp.TechProfile{Name: "tp1", SubscriberIdentifier: "subscriber1",
		ProfileType: "pt1", NumGemPorts: 1, NumTconts: 1, Version: 1,
		InstanceCtrl: tp.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
	}
	tprofile.UsScheduler.Direction = "UPSTREAM"
	tprofile.UsScheduler.AdditionalBw = "AdditionalBW_None"
	tprofile.UsScheduler.QSchedPolicy = "WRR"

	tprofile2 := tprofile
	tprofile2.DsScheduler.Direction = "DOWNSTREAM"
	tprofile2.DsScheduler.AdditionalBw = "AdditionalBW_None"
	tprofile2.DsScheduler.QSchedPolicy = "WRR"
	//defTprofile := &tp.DefaultTechProfile{}
	type args struct {
		Dir     tp_pb.Direction
		IntfID  uint32
		OnuID   uint32
		UniID   uint32
		UniPort uint32
		TpInst  *tp.TechProfile
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		// TODO: Add test cases.
		{"RemoveSchedulerQueues", args{Dir: tp_pb.Direction_UPSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile}, false},
		{"RemoveSchedulerQueues", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2}, false},
		// negative test cases
		{"RemoveSchedulerQueues", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2}, false},
		{"RemoveSchedulerQueues", args{Dir: tp_pb.Direction_DOWNSTREAM, IntfID: 1, OnuID: 1, UniID: 1, UniPort: 1, TpInst: tprofile2}, false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			if err := flowMgr.RemoveSchedulerQueues(tt.args.Dir, tt.args.IntfID, tt.args.OnuID, tt.args.UniID, tt.args.UniPort, tt.args.TpInst); (err != nil) != tt.wantErr {
				t.Errorf("OpenOltFlowMgr.RemoveSchedulerQueues() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}

}

func TestOpenOltFlowMgr_RemoveFlow(t *testing.T) {
	// flowMgr := newMockFlowmgr()
	log.Debug("Info Warning Error: Starting RemoveFlow() test")
	fa := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(2),
			fu.Metadata_ofp(2),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 101)),
			fu.Output(1),
		},
	}
	ofpstats := fu.MkFlowStat(fa)
	ofpstats.Cookie = ofpstats.Id
	flowMgr.storedDeviceFlows = append(flowMgr.storedDeviceFlows, *ofpstats)
	lldpFa := &fu.FlowArgs{
		KV: fu.OfpFlowModArgs{"priority": 1000, "cookie": 48132224281636694},
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1),
			fu.EthType(0x88CC),
			fu.TunnelId(536870912),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(uint32(ofp.OfpPortNo_OFPP_CONTROLLER)),
		},
	}
	lldpofpstats := fu.MkFlowStat(lldpFa)
	//lldpofpstats.Cookie = lldpofpstats.Id

	dhcpFa := &fu.FlowArgs{
		KV: fu.OfpFlowModArgs{"priority": 1000, "cookie": 48132224281636694},
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1),
			fu.UdpSrc(67),
			//fu.TunnelId(536870912),
			fu.IpProto(17),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(uint32(ofp.OfpPortNo_OFPP_CONTROLLER)),
		},
	}
	dhcpofpstats := fu.MkFlowStat(dhcpFa)
	//dhcpofpstats.Cookie = dhcpofpstats.Id
	type args struct {
		flow *ofp.OfpFlowStats
	}
	tests := []struct {
		name string
		args args
	}{
		// TODO: Add test cases.
		{"RemoveFlow", args{flow: ofpstats}},
		{"RemoveFlow", args{flow: lldpofpstats}},
		{"RemoveFlow", args{flow: dhcpofpstats}},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			flowMgr.RemoveFlow(tt.args.flow)
		})
	}
	// t.Error("=====")
}

func TestOpenOltFlowMgr_AddFlow(t *testing.T) {
	// flowMgr := newMockFlowmgr()
	kw := make(map[string]uint64)
	kw["table_id"] = 1
	kw["meter_id"] = 1
	kw["write_metadata"] = 0x4000000000 // Tech-Profile-ID 64

	// Upstream flow
	fa := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65536),
			fu.PushVlan(0x8100),
		},
		KV: kw,
	}

	// Downstream flow
	fa3 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(65536),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			//fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 101)),
			fu.PopVlan(),
			fu.Output(536870912),
		},
		KV: kw,
	}

	fa2 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1000),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 101)),
			fu.Output(65533),
		},
		KV: kw,
	}

	// TODO Add LLDP flow
	// TODO Add DHCP flow

	// Flows for negative scenarios
	// Failure in formulateActionInfoFromFlow()
	fa4 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1000),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			fu.Experimenter(257, []byte{1, 2, 3, 4}),
		},
		KV: kw,
	}

	// Invalid Output
	fa5 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1000),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(0),
		},
		KV: kw,
	}

	// Tech-Profile-ID update (not supported)
	kw6 := make(map[string]uint64)
	kw6["table_id"] = 1
	kw6["meter_id"] = 1
	kw6["write_metadata"] = 0x4100000000 // TpID Other than the stored one
	fa6 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.TunnelId(16),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65535),
		},
		KV: kw6,
	}

	lldpFa := &fu.FlowArgs{
		KV: fu.OfpFlowModArgs{"priority": 1000, "cookie": 48132224281636694},
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1),
			fu.EthType(0x88CC),
			fu.TunnelId(536870912),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(uint32(ofp.OfpPortNo_OFPP_CONTROLLER)),
		},
	}

	dhcpFa := &fu.FlowArgs{
		KV: fu.OfpFlowModArgs{"priority": 1000, "cookie": 48132224281636694},
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1),
			fu.UdpSrc(67),
			//fu.TunnelId(536870912),
			fu.IpProto(17),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(uint32(ofp.OfpPortNo_OFPP_CONTROLLER)),
		},
	}
	igmpFa := &fu.FlowArgs{
		KV: fu.OfpFlowModArgs{"priority": 1000, "cookie": 48132224281636694},
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(1),
			fu.UdpSrc(67),
			//fu.TunnelId(536870912),
			fu.IpProto(2),
		},
		Actions: []*ofp.OfpAction{
			fu.Output(uint32(ofp.OfpPortNo_OFPP_CONTROLLER)),
		},
	}

	fa9 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.TunnelId(16),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
			fu.VlanPcp(1000),
			fu.UdpDst(65535),
			fu.UdpSrc(536870912),
			fu.Ipv4Dst(65535),
			fu.Ipv4Src(536870912),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65535),
		},
		KV: kw6,
	}

	fa10 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(65533),
			//	fu.TunnelId(16),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
			fu.VlanPcp(1000),
			fu.UdpDst(65535),
			fu.UdpSrc(536870912),
			fu.Ipv4Dst(65535),
			fu.Ipv4Src(536870912),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65535),
		},
		KV: kw6,
	}
	ofpstats := fu.MkFlowStat(fa)
	ofpstats2 := fu.MkFlowStat(fa2)
	ofpstats3 := fu.MkFlowStat(fa3)
	ofpstats4 := fu.MkFlowStat(fa4)
	ofpstats5 := fu.MkFlowStat(fa5)
	ofpstats6 := fu.MkFlowStat(fa6)
	ofpstats7 := fu.MkFlowStat(lldpFa)
	ofpstats8 := fu.MkFlowStat(dhcpFa)
	ofpstats9 := fu.MkFlowStat(fa9)
	ofpstats10 := fu.MkFlowStat(fa10)
	igmpstats := fu.MkFlowStat(igmpFa)

	ofpMeterConfig := &ofp.OfpMeterConfig{Flags: 1, MeterId: 1}
	flowMetadata := &voltha.FlowMetadata{
		Meters: []*ofp.OfpMeterConfig{ofpMeterConfig},
	}
	type args struct {
		flow         *ofp.OfpFlowStats
		flowMetadata *voltha.FlowMetadata
	}
	tests := []struct {
		name string
		args args
	}{
		// TODO: Add test cases.
		{"AddFlow", args{flow: ofpstats, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats2, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats3, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats4, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats5, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats6, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats7, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats8, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats9, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: igmpstats, flowMetadata: flowMetadata}},
		{"AddFlow", args{flow: ofpstats10, flowMetadata: flowMetadata}},
		//ofpstats10
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			flowMgr.AddFlow(tt.args.flow, tt.args.flowMetadata)
		})
	}
}

func TestOpenOltFlowMgr_UpdateOnuInfo(t *testing.T) {
	// flowMgr := newMockFlowmgr()
	type args struct {
		intfID    uint32
		onuID     uint32
		serialNum string
	}
	tests := []struct {
		name string
		args args
	}{
		// TODO: Add test cases.
		{"UpdateOnuInfo", args{1, 1, "onu1"}},
		{"UpdateOnuInfo", args{2, 3, "onu1"}},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			flowMgr.UpdateOnuInfo(tt.args.intfID, tt.args.onuID, tt.args.serialNum)
		})
	}
}

func TestOpenOltFlowMgr_GetLogicalPortFromPacketIn(t *testing.T) {
	// flowMgr := newMockFlowmgr()
	type args struct {
		packetIn *openoltpb2.PacketIndication
	}
	tests := []struct {
		name    string
		args    args
		want    uint32
		wantErr bool
	}{
		// TODO: Add test cases.
		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 1, GemportId: 1, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1, false},
		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "nni", IntfId: 1, GemportId: 1, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 65537, false},
		// Negative Test cases.
		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 2, GemportId: 1, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 0, true},
		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 1, GemportId: 1, FlowId: 100, PortNo: 0, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 2064, false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			got, err := flowMgr.GetLogicalPortFromPacketIn(tt.args.packetIn)
			if (err != nil) != tt.wantErr {
				t.Errorf("OpenOltFlowMgr.GetLogicalPortFromPacketIn() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if got != tt.want {
				t.Errorf("OpenOltFlowMgr.GetLogicalPortFromPacketIn() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestOpenOltFlowMgr_GetPacketOutGemPortID(t *testing.T) {
	// flwMgr := newMockFlowmgr()

	type args struct {
		intfID  uint32
		onuID   uint32
		portNum uint32
	}
	tests := []struct {
		name    string
		args    args
		want    uint32
		wantErr bool
	}{
		// TODO: Add test cases.
		{"GetPacketOutGemPortID", args{intfID: 1, onuID: 1, portNum: 1}, 1, false},
		{"GetPacketOutGemPortID", args{intfID: 2, onuID: 2, portNum: 2}, 2, false},
		{"GetPacketOutGemPortID", args{intfID: 1, onuID: 2, portNum: 2}, 0, true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			got, err := flowMgr.GetPacketOutGemPortID(tt.args.intfID, tt.args.onuID, tt.args.portNum)
			if (err != nil) != tt.wantErr {
				t.Errorf("OpenOltFlowMgr.GetPacketOutGemPortID() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if got != tt.want {
				t.Errorf("OpenOltFlowMgr.GetPacketOutGemPortID() = %v, want %v", got, tt.want)
			}

		})
	}
}

func TestOpenOltFlowMgr_DeleteTechProfileInstance(t *testing.T) {
	// flwMgr := newMockFlowmgr()
	type args struct {
		intfID uint32
		onuID  uint32
		uniID  uint32
		sn     string
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		// TODO: Add test cases.
		{"DeleteTechProfileInstance", args{intfID: 0, onuID: 1, uniID: 1, sn: ""}, false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			if err := flowMgr.DeleteTechProfileInstance(tt.args.intfID, tt.args.onuID, tt.args.uniID, tt.args.sn); (err != nil) != tt.wantErr {
				t.Errorf("OpenOltFlowMgr.DeleteTechProfileInstance() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

func TestOpenOltFlowMgr_checkAndAddFlow(t *testing.T) {
	// flowMgr := newMockFlowmgr()
	kw := make(map[string]uint64)
	kw["table_id"] = 1
	kw["meter_id"] = 1
	kw["write_metadata"] = 0x4000000000 // Tech-Profile-ID 64

	// Upstream flow
	fa := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.Metadata_ofp(1),
			fu.IpProto(17), // dhcp
			fu.VlanPcp(257),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65536),
			fu.PushVlan(0x8100),
		},
		KV: kw,
	}

	// EAPOL
	fa2 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.Metadata_ofp(1),
			fu.EthType(0x888E),
			fu.VlanPcp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 257)),
			fu.Output(65536),
			fu.PushVlan(0x8100),
		},
		KV: kw,
	}

	// HSIA
	fa3 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(536870912),
			fu.Metadata_ofp(1),
			//fu.EthType(0x8100),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0)),
			fu.Output(65536),
			fu.PushVlan(0x8100),
		},
		KV: kw,
	}

	fa4 := &fu.FlowArgs{
		MatchFields: []*ofp.OfpOxmOfbField{
			fu.InPort(65535),
			fu.Metadata_ofp(1),
			fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0),
			fu.VlanPcp(1),
		},
		Actions: []*ofp.OfpAction{
			//fu.SetField(fu.Metadata_ofp(uint64(ofp.OfpInstructionType_OFPIT_WRITE_METADATA | 2))),
			fu.SetField(fu.VlanVid(uint32(ofp.OfpVlanId_OFPVID_PRESENT) | 0)),
			fu.Output(536870912),
			fu.PopVlan(),
		},
		KV: kw,
	}

	classifierInfo := make(map[string]interface{})
	actionInfo := make(map[string]interface{})
	classifierInfo2 := make(map[string]interface{})
	actionInfo2 := make(map[string]interface{})
	classifierInfo3 := make(map[string]interface{})
	actionInfo3 := make(map[string]interface{})
	classifierInfo4 := make(map[string]interface{})
	actionInfo4 := make(map[string]interface{})
	flowState := fu.MkFlowStat(fa)
	flowState2 := fu.MkFlowStat(fa2)
	flowState3 := fu.MkFlowStat(fa3)
	flowState4 := fu.MkFlowStat(fa4)
	formulateClassifierInfoFromFlow(classifierInfo, flowState)
	formulateClassifierInfoFromFlow(classifierInfo2, flowState2)
	formulateClassifierInfoFromFlow(classifierInfo3, flowState3)
	formulateClassifierInfoFromFlow(classifierInfo4, flowState4)

	err := formulateActionInfoFromFlow(actionInfo, classifierInfo, flowState)
	if err != nil {
		// Error logging is already done in the called function
		// So just return in case of error
		return
	}

	err = formulateActionInfoFromFlow(actionInfo2, classifierInfo2, flowState2)
	if err != nil {
		// Error logging is already done in the called function
		// So just return in case of error
		return
	}

	err = formulateActionInfoFromFlow(actionInfo3, classifierInfo3, flowState3)
	if err != nil {
		// Error logging is already done in the called function
		// So just return in case of error
		return
	}

	err = formulateActionInfoFromFlow(actionInfo4, classifierInfo4, flowState4)
	if err != nil {
		// Error logging is already done in the called function
		// So just return in case of error
		return
	}

	//ofpMeterConfig := &ofp.OfpMeterConfig{Flags: 1, MeterId: 1}
	//flowMetadata := &voltha.FlowMetadata{
	//	Meters: []*ofp.OfpMeterConfig{ofpMeterConfig},
	//}

	TpInst := &tp.TechProfile{
		Name:                 "Test-Tech-Profile",
		SubscriberIdentifier: "257",
		ProfileType:          "Mock",
		Version:              1,
		NumGemPorts:          4,
		NumTconts:            1,
		InstanceCtrl: tp.InstanceControl{
			Onu: "1",
			Uni: "16",
		},
	}

	type fields struct {
		techprofile       []tp.TechProfileIf
		deviceHandler     *DeviceHandler
		resourceMgr       *rsrcMgr.OpenOltResourceMgr
		onuIds            map[onuIDKey]onuInfo
		onuSerialNumbers  map[string]onuInfo
		onuGemPortIds     map[gemPortKey]onuInfo
		packetInGemPort   map[packetInInfoKey]uint32
		storedDeviceFlows []ofp.OfpFlowStats
	}
	type args struct {
		args           map[string]uint32
		classifierInfo map[string]interface{}
		actionInfo     map[string]interface{}
		flow           *ofp.OfpFlowStats
		gemPort        uint32
		intfID         uint32
		onuID          uint32
		uniID          uint32
		portNo         uint32
		TpInst         *tp.TechProfile
		allocID        []uint32
		gemPorts       []uint32
		TpID           uint32
		uni            string
	}
	tests := []struct {
		name   string
		fields fields
		args   args
	}{
		{
			name: "checkAndAddFlow-1",
			args: args{
				args:           nil,
				classifierInfo: classifierInfo,
				actionInfo:     actionInfo,
				flow:           flowState,
				gemPort:        1,
				intfID:         1,
				onuID:          1,
				uniID:          16,
				portNo:         1,
				TpInst:         TpInst,
				allocID:        []uint32{0x8001, 0x8002, 0x8003, 0x8004},
				gemPorts:       []uint32{1, 2, 3, 4},
				TpID:           64,
				uni:            "16",
			},
		},
		{
			name: "checkAndAddFlow-2",
			args: args{
				args:           nil,
				classifierInfo: classifierInfo2,
				actionInfo:     actionInfo2,
				flow:           flowState2,
				gemPort:        1,
				intfID:         1,
				onuID:          1,
				uniID:          16,
				portNo:         1,
				TpInst:         TpInst,
				allocID:        []uint32{0x8001, 0x8002, 0x8003, 0x8004},
				gemPorts:       []uint32{1, 2, 3, 4},
				TpID:           64,
				uni:            "16",
			},
		},
		{
			name: "checkAndAddFlow-3",
			args: args{
				args:           nil,
				classifierInfo: classifierInfo3,
				actionInfo:     actionInfo3,
				flow:           flowState3,
				gemPort:        1,
				intfID:         1,
				onuID:          1,
				uniID:          16,
				portNo:         1,
				TpInst:         TpInst,
				allocID:        []uint32{0x8001, 0x8002, 0x8003, 0x8004},
				gemPorts:       []uint32{1, 2, 3, 4},
				TpID:           64,
				uni:            "16",
			},
		},
		{
			name: "checkAndAddFlow-4",
			args: args{
				args:           nil,
				classifierInfo: classifierInfo4,
				actionInfo:     actionInfo4,
				flow:           flowState4,
				gemPort:        1,
				intfID:         1,
				onuID:          1,
				uniID:          16,
				portNo:         1,
				TpInst:         TpInst,
				allocID:        []uint32{0x8001, 0x8002, 0x8003, 0x8004},
				gemPorts:       []uint32{1, 2, 3, 4},
				TpID:           64,
				uni:            "16",
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			flowMgr.checkAndAddFlow(tt.args.args, tt.args.classifierInfo, tt.args.actionInfo, tt.args.flow, tt.args.gemPort,
				tt.args.intfID, tt.args.onuID, tt.args.uniID, tt.args.portNo, tt.args.TpInst, tt.args.allocID, tt.args.gemPorts,
				tt.args.TpID, tt.args.uni)
		})
	}
}