//go:build windows
// +build windows

/*
Copyright 2021 The Kubernetes Authors.

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 winkernel

import (
	"encoding/json"
	"fmt"
	"net"
	"strings"
	"testing"
	"time"

	"github.com/Microsoft/hcsshim/hcn"
	v1 "k8s.io/api/core/v1"
	discovery "k8s.io/api/discovery/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/intstr"
	"k8s.io/kubernetes/pkg/proxy"
	"k8s.io/kubernetes/pkg/proxy/healthcheck"
	fakehcn "k8s.io/kubernetes/pkg/proxy/winkernel/testing"
	netutils "k8s.io/utils/net"
	"k8s.io/utils/ptr"
)

const (
	testHostName      = "test-hostname"
	testNetwork       = "TestNetwork"
	ipAddress         = "10.0.0.1"
	prefixLen         = 24
	macAddress        = "00-11-22-33-44-55"
	destinationPrefix = "192.168.2.0/24"
	providerAddress   = "10.0.0.3"
	guid              = "123ABC"
	endpointGuid1     = "EPID-1"
	loadbalancerGuid1 = "LBID-1"
	endpointLocal     = "EP-LOCAL"
	endpointGw        = "EP-GW"
	epIpAddressGw     = "192.168.2.1"
	epMacAddressGw    = "00-11-22-33-44-66"
)

func newHnsNetwork(networkInfo *hnsNetworkInfo) *hcn.HostComputeNetwork {
	var policies []hcn.NetworkPolicy
	for _, remoteSubnet := range networkInfo.remoteSubnets {
		policySettings := hcn.RemoteSubnetRoutePolicySetting{
			DestinationPrefix:           remoteSubnet.destinationPrefix,
			IsolationId:                 remoteSubnet.isolationID,
			ProviderAddress:             remoteSubnet.providerAddress,
			DistributedRouterMacAddress: remoteSubnet.drMacAddress,
		}
		settings, _ := json.Marshal(policySettings)
		policy := hcn.NetworkPolicy{
			Type:     hcn.RemoteSubnetRoute,
			Settings: settings,
		}
		policies = append(policies, policy)
	}

	network := &hcn.HostComputeNetwork{
		Id:       networkInfo.id,
		Name:     networkInfo.name,
		Type:     hcn.NetworkType(networkInfo.networkType),
		Policies: policies,
	}
	return network
}

func NewFakeProxier(syncPeriod time.Duration, minSyncPeriod time.Duration, hostname string, nodeIP net.IP, networkType string) *Proxier {
	sourceVip := "192.168.1.2"
	var remoteSubnets []*remoteSubnetInfo
	rs := &remoteSubnetInfo{
		destinationPrefix: destinationPrefix,
		isolationID:       4096,
		providerAddress:   providerAddress,
		drMacAddress:      macAddress,
	}
	remoteSubnets = append(remoteSubnets, rs)
	hnsNetworkInfo := &hnsNetworkInfo{
		id:            strings.ToUpper(guid),
		name:          testNetwork,
		networkType:   networkType,
		remoteSubnets: remoteSubnets,
	}
	hnsNetwork := newHnsNetwork(hnsNetworkInfo)
	hcnMock := fakehcn.NewHcnMock(hnsNetwork)
	proxier := &Proxier{
		svcPortMap:          make(proxy.ServicePortMap),
		endpointsMap:        make(proxy.EndpointsMap),
		hostname:            testHostName,
		nodeIP:              nodeIP,
		serviceHealthServer: healthcheck.NewFakeServiceHealthServer(),
		network:             *hnsNetworkInfo,
		sourceVip:           sourceVip,
		hostMac:             macAddress,
		isDSR:               false,
		hns: &hns{
			hcn: hcnMock,
		},
		hcn:                   hcnMock,
		endPointsRefCount:     make(endPointsReferenceCountMap),
		forwardHealthCheckVip: true,
		mapStaleLoadbalancers: make(map[string]bool),
	}

	serviceChanges := proxy.NewServiceChangeTracker(proxier.newServiceInfo, v1.IPv4Protocol, nil, proxier.serviceMapChange)
	endpointsChangeTracker := proxy.NewEndpointsChangeTracker(hostname, proxier.newEndpointInfo, v1.IPv4Protocol, nil, proxier.endpointsMapChange)
	proxier.endpointsChanges = endpointsChangeTracker
	proxier.serviceChanges = serviceChanges

	return proxier
}

func TestCreateServiceVip(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcExternalIPs := "50.60.70.81"
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.ExternalIPs = []string{svcExternalIPs}
			svc.Spec.SessionAffinity = v1.ServiceAffinityClientIP
			svc.Spec.SessionAffinityConfig = &v1.SessionAffinityConfig{
				ClientIP: &v1.ClientIPConfig{
					TimeoutSeconds: ptr.To[int32](v1.DefaultClientIPServiceAffinitySeconds),
				},
			}
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.svcPortMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.remoteEndpoint == nil {
			t.Error()
		}
		if svcInfo.remoteEndpoint.ip != svcIP {
			t.Error()
		}
	}
}

func TestCreateRemoteEndpointOverlay(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName.Port),
				Port:     ptr.To(int32(svcPort)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != "EPID-3" {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *proxier.endPointsRefCount["EPID-3"] <= 0 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[endpointGuid1])
	}

	if *proxier.endPointsRefCount["EPID-3"] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}
}

func TestCreateRemoteEndpointL2Bridge(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName.Port),
				Port:     ptr.To(int32(svcPort)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != endpointGuid1 {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *proxier.endPointsRefCount[endpointGuid1] <= 0 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[endpointGuid1])
	}

	if *proxier.endPointsRefCount[endpointGuid1] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}
}
func TestSharedRemoteEndpointDelete(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	svcIP1 := "10.20.30.41"
	svcPort1 := 80
	svcNodePort1 := 3001
	svcPortName1 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	svcIP2 := "10.20.30.42"
	svcPort2 := 80
	svcNodePort2 := 3002
	svcPortName2 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc2"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName1.Port),
				Port:     ptr.To(int32(svcPort1)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName2.Port),
				Port:     ptr.To(int32(svcPort2)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)
	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName1][0]
	epInfo, ok := ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != endpointGuid1 {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *proxier.endPointsRefCount[endpointGuid1] != 2 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[endpointGuid1])
	}

	if *proxier.endPointsRefCount[endpointGuid1] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}

	proxier.setInitialized(false)
	deleteServices(proxier,
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)

	deleteEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName2.Port),
				Port:     ptr.To(int32(svcPort2)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep = proxier.endpointsMap[svcPortName1][0]
	epInfo, ok = ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != endpointGuid1 {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *epInfo.refCount != 1 {
		t.Errorf("Incorrect Refcount. Current value: %v", *epInfo.refCount)
	}

	if *proxier.endPointsRefCount[endpointGuid1] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}
}
func TestSharedRemoteEndpointUpdate(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), "L2Bridge")
	if proxier == nil {
		t.Error()
	}

	svcIP1 := "10.20.30.41"
	svcPort1 := 80
	svcNodePort1 := 3001
	svcPortName1 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	svcIP2 := "10.20.30.42"
	svcPort2 := 80
	svcNodePort2 := 3002
	svcPortName2 := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc2"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName2.Namespace, svcPortName2.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP2
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName2.Port,
				Port:     int32(svcPort2),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort2),
			}}
		}),
	)

	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName1.Port),
				Port:     ptr.To(int32(svcPort1)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
		makeTestEndpointSlice(svcPortName2.Namespace, svcPortName2.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName2.Port),
				Port:     ptr.To(int32(svcPort2)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()
	ep := proxier.endpointsMap[svcPortName1][0]
	epInfo, ok := ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != endpointGuid1 {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *proxier.endPointsRefCount[endpointGuid1] != 2 {
		t.Errorf("RefCount not incremented. Current value: %v", *proxier.endPointsRefCount[endpointGuid1])
	}

	if *proxier.endPointsRefCount[endpointGuid1] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}

	proxier.setInitialized(false)

	proxier.OnServiceUpdate(
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort1),
			}}
		}),
		makeTestService(svcPortName1.Namespace, svcPortName1.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP1
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName1.Port,
				Port:     int32(svcPort1),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(3003),
			}}
		}))

	proxier.OnEndpointSliceUpdate(
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName1.Port),
				Port:     ptr.To(int32(svcPort1)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
		makeTestEndpointSlice(svcPortName1.Namespace, svcPortName1.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName1.Port),
				Port:     ptr.To(int32(svcPort1)),
				Protocol: ptr.To(v1.ProtocolTCP),
			},
				{
					Name:     ptr.To("p443"),
					Port:     ptr.To[int32](443),
					Protocol: ptr.To(v1.ProtocolTCP),
				}}
		}))

	proxier.mu.Lock()
	proxier.endpointSlicesSynced = true
	proxier.mu.Unlock()

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	ep = proxier.endpointsMap[svcPortName1][0]
	epInfo, ok = ep.(*endpointInfo)

	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName1.String())

	} else {
		if epInfo.hnsID != endpointGuid1 {
			t.Errorf("%v does not match %v", epInfo.hnsID, endpointGuid1)
		}
	}

	if *epInfo.refCount != 2 {
		t.Errorf("Incorrect refcount. Current value: %v", *epInfo.refCount)
	}

	if *proxier.endPointsRefCount[endpointGuid1] != *epInfo.refCount {
		t.Errorf("Global refCount: %v does not match endpoint refCount: %v", *proxier.endPointsRefCount[endpointGuid1], *epInfo.refCount)
	}
}
func TestCreateLoadBalancer(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName.Port),
				Port:     ptr.To(int32(svcPort)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.svcPortMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != loadbalancerGuid1 {
			t.Errorf("%v does not match %v", svcInfo.hnsID, loadbalancerGuid1)
		}
	}
}

func TestCreateDsrLoadBalancer(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}
	lbIP := "11.21.31.41"

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyLocal
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
			svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
				IP: lbIP,
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
				NodeName:  ptr.To("testhost"),
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName.Port),
				Port:     ptr.To(int32(svcPort)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	hcn := (proxier.hcn).(*fakehcn.HcnMock)
	proxier.rootHnsEndpointName = endpointGw
	hcn.PopulateQueriedEndpoints(endpointLocal, guid, epIpAddressRemote, macAddress, prefixLen)
	hcn.PopulateQueriedEndpoints(endpointGw, guid, epIpAddressGw, epMacAddressGw, prefixLen)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.svcPortMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != loadbalancerGuid1 {
			t.Errorf("%v does not match %v", svcInfo.hnsID, loadbalancerGuid1)
		}
		if svcInfo.localTrafficDSR != true {
			t.Errorf("Failed to create DSR loadbalancer with local traffic policy")
		}
		if len(svcInfo.loadBalancerIngressIPs) == 0 {
			t.Errorf("svcInfo does not have any loadBalancerIngressIPs, %+v", svcInfo)
		} else if svcInfo.loadBalancerIngressIPs[0].healthCheckHnsID != "LBID-4" {
			t.Errorf("The Hns Loadbalancer HealthCheck Id %v does not match %v. ServicePortName %q", svcInfo.loadBalancerIngressIPs[0].healthCheckHnsID, loadbalancerGuid1, svcPortName.String())
		}
	}
}

// TestClusterIPLBInCreateDsrLoadBalancer tests, if the available endpoints are remote,
// syncproxyrules only creates ClusterIP Loadbalancer and no NodePort, External IP or IngressIP
// loadbalancers will be created.
func TestClusterIPLBInCreateDsrLoadBalancer(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)

	if proxier == nil {
		t.Error()
	}

	svcIP := "10.20.30.41"
	svcPort := 80
	svcNodePort := 3001
	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}
	lbIP := "11.21.31.41"

	makeServiceMap(proxier,
		makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
			svc.Spec.Type = "NodePort"
			svc.Spec.ClusterIP = svcIP
			svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyLocal
			svc.Spec.Ports = []v1.ServicePort{{
				Name:     svcPortName.Port,
				Port:     int32(svcPort),
				Protocol: v1.ProtocolTCP,
				NodePort: int32(svcNodePort),
			}}
			svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
				IP: lbIP,
			}}
		}),
	)
	populateEndpointSlices(proxier,
		makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
			eps.AddressType = discovery.AddressTypeIPv4
			eps.Endpoints = []discovery.Endpoint{{
				Addresses: []string{epIpAddressRemote},
				NodeName:  ptr.To("testhost2"), // This will make this endpoint as a remote endpoint
			}}
			eps.Ports = []discovery.EndpointPort{{
				Name:     ptr.To(svcPortName.Port),
				Port:     ptr.To(int32(svcPort)),
				Protocol: ptr.To(v1.ProtocolTCP),
			}}
		}),
	)

	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.svcPortMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		// Checking ClusterIP Loadbalancer is created
		if svcInfo.hnsID != loadbalancerGuid1 {
			t.Errorf("%v does not match %v", svcInfo.hnsID, loadbalancerGuid1)
		}
		// Verifying NodePort Loadbalancer is not created
		if svcInfo.nodePorthnsID != "" {
			t.Errorf("NodePortHnsID %v is not empty.", svcInfo.nodePorthnsID)
		}
		// Verifying ExternalIP Loadbalancer is not created
		for _, externalIP := range svcInfo.externalIPs {
			if externalIP.hnsID != "" {
				t.Errorf("ExternalLBID %v is not empty.", externalIP.hnsID)
			}
		}
		// Verifying IngressIP Loadbalancer is not created
		for _, ingressIP := range svcInfo.loadBalancerIngressIPs {
			if ingressIP.hnsID != "" {
				t.Errorf("IngressLBID %v is not empty.", ingressIP.hnsID)
			}
		}
	}
}

func TestEndpointSlice(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	proxier.servicesSynced = true
	proxier.endpointSlicesSynced = true

	svcPortName := proxy.ServicePortName{
		NamespacedName: makeNSN("ns1", "svc1"),
		Port:           "p80",
		Protocol:       v1.ProtocolTCP,
	}

	proxier.OnServiceAdd(&v1.Service{
		ObjectMeta: metav1.ObjectMeta{Name: svcPortName.Name, Namespace: svcPortName.Namespace},
		Spec: v1.ServiceSpec{
			ClusterIP: "172.20.1.1",
			Selector:  map[string]string{"foo": "bar"},
			Ports:     []v1.ServicePort{{Name: svcPortName.Port, TargetPort: intstr.FromInt32(80), Protocol: v1.ProtocolTCP}},
		},
	})

	// Add initial endpoint slice
	endpointSlice := &discovery.EndpointSlice{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-1", svcPortName.Name),
			Namespace: svcPortName.Namespace,
			Labels:    map[string]string{discovery.LabelServiceName: svcPortName.Name},
		},
		Ports: []discovery.EndpointPort{{
			Name:     &svcPortName.Port,
			Port:     ptr.To[int32](80),
			Protocol: ptr.To(v1.ProtocolTCP),
		}},
		AddressType: discovery.AddressTypeIPv4,
		Endpoints: []discovery.Endpoint{{
			Addresses:  []string{"192.168.2.3"},
			Conditions: discovery.EndpointConditions{Ready: ptr.To(true)},
			NodeName:   ptr.To("testhost2"),
		}},
	}

	proxier.OnEndpointSliceAdd(endpointSlice)
	proxier.setInitialized(true)
	proxier.syncProxyRules()

	svc := proxier.svcPortMap[svcPortName]
	svcInfo, ok := svc.(*serviceInfo)
	if !ok {
		t.Errorf("Failed to cast serviceInfo %q", svcPortName.String())

	} else {
		if svcInfo.hnsID != loadbalancerGuid1 {
			t.Errorf("The Hns Loadbalancer Id %v does not match %v. ServicePortName %q", svcInfo.hnsID, loadbalancerGuid1, svcPortName.String())
		}
	}

	ep := proxier.endpointsMap[svcPortName][0]
	epInfo, ok := ep.(*endpointInfo)
	if !ok {
		t.Errorf("Failed to cast endpointInfo %q", svcPortName.String())

	} else {
		if epInfo.hnsID != "EPID-3" {
			t.Errorf("Hns EndpointId %v does not match %v. ServicePortName %q", epInfo.hnsID, endpointGuid1, svcPortName.String())
		}
	}
}

func TestNoopEndpointSlice(t *testing.T) {
	p := Proxier{}
	p.OnEndpointSliceAdd(&discovery.EndpointSlice{})
	p.OnEndpointSliceUpdate(&discovery.EndpointSlice{}, &discovery.EndpointSlice{})
	p.OnEndpointSliceDelete(&discovery.EndpointSlice{})
	p.OnEndpointSlicesSynced()
}

func TestFindRemoteSubnetProviderAddress(t *testing.T) {
	syncPeriod := 30 * time.Second
	proxier := NewFakeProxier(syncPeriod, syncPeriod, "testhost", netutils.ParseIPSloppy("10.0.0.1"), NETWORK_TYPE_OVERLAY)
	if proxier == nil {
		t.Error()
	}

	networkInfo, _ := proxier.hns.getNetworkByName(testNetwork)
	pa := networkInfo.findRemoteSubnetProviderAddress(providerAddress)

	if pa != providerAddress {
		t.Errorf("%v does not match %v", pa, providerAddress)
	}

	pa = networkInfo.findRemoteSubnetProviderAddress(epIpAddressRemote)

	if pa != providerAddress {
		t.Errorf("%v does not match %v", pa, providerAddress)
	}

	pa = networkInfo.findRemoteSubnetProviderAddress(serviceVip)

	if len(pa) != 0 {
		t.Errorf("Provider address is not empty as expected")
	}
}

func makeNSN(namespace, name string) types.NamespacedName {
	return types.NamespacedName{Namespace: namespace, Name: name}
}

func makeServiceMap(proxier *Proxier, allServices ...*v1.Service) {
	for i := range allServices {
		proxier.OnServiceAdd(allServices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.servicesSynced = true
}
func deleteServices(proxier *Proxier, allServices ...*v1.Service) {
	for i := range allServices {
		proxier.OnServiceDelete(allServices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.servicesSynced = true
}

func makeTestService(namespace, name string, svcFunc func(*v1.Service)) *v1.Service {
	svc := &v1.Service{
		ObjectMeta: metav1.ObjectMeta{
			Name:        name,
			Namespace:   namespace,
			Annotations: map[string]string{},
		},
		Spec:   v1.ServiceSpec{},
		Status: v1.ServiceStatus{},
	}
	svcFunc(svc)
	return svc
}

func deleteEndpointSlices(proxier *Proxier, allEndpointSlices ...*discovery.EndpointSlice) {
	for i := range allEndpointSlices {
		proxier.OnEndpointSliceDelete(allEndpointSlices[i])
	}

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.endpointSlicesSynced = true
}

func populateEndpointSlices(proxier *Proxier, allEndpointSlices ...*discovery.EndpointSlice) {
	for i := range allEndpointSlices {
		proxier.OnEndpointSliceAdd(allEndpointSlices[i])
	}
}

func makeTestEndpointSlice(namespace, name string, sliceNum int, epsFunc func(*discovery.EndpointSlice)) *discovery.EndpointSlice {
	eps := &discovery.EndpointSlice{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-%d", name, sliceNum),
			Namespace: namespace,
			Labels:    map[string]string{discovery.LabelServiceName: name},
		},
	}
	epsFunc(eps)
	return eps
}