/*
Copyright 2014 The Kubernetes Authors All rights reserved.

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 aws

import (
	"io"
	"reflect"
	"strings"
	"testing"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/service/ec2"
	"github.com/aws/aws-sdk-go/service/elb"

	"github.com/aws/aws-sdk-go/service/autoscaling"
	"github.com/golang/glog"
	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/unversioned"
	"k8s.io/kubernetes/pkg/util/sets"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

const TestClusterId = "clusterid.test"

func TestReadAWSCloudConfig(t *testing.T) {
	tests := []struct {
		name string

		reader io.Reader
		aws    Services

		expectError bool
		zone        string
	}{
		{
			"No config reader",
			nil, nil,
			true, "",
		},
		{
			"Empty config, no metadata",
			strings.NewReader(""), nil,
			true, "",
		},
		{
			"No zone in config, no metadata",
			strings.NewReader("[global]\n"), nil,
			true, "",
		},
		{
			"Zone in config, no metadata",
			strings.NewReader("[global]\nzone = eu-west-1a"), nil,
			false, "eu-west-1a",
		},
		{
			"No zone in config, metadata does not have zone",
			strings.NewReader("[global]\n"), NewFakeAWSServices().withAz(""),
			true, "",
		},
		{
			"No zone in config, metadata has zone",
			strings.NewReader("[global]\n"), NewFakeAWSServices(),
			false, "us-east-1a",
		},
		{
			"Zone in config should take precedence over metadata",
			strings.NewReader("[global]\nzone = eu-west-1a"), NewFakeAWSServices(),
			false, "eu-west-1a",
		},
	}

	for _, test := range tests {
		t.Logf("Running test case %s", test.name)
		var metadata EC2Metadata
		if test.aws != nil {
			metadata, _ = test.aws.Metadata()
		}
		cfg, err := readAWSCloudConfig(test.reader, metadata)
		if test.expectError {
			if err == nil {
				t.Errorf("Should error for case %s (cfg=%v)", test.name, cfg)
			}
		} else {
			if err != nil {
				t.Errorf("Should succeed for case: %s", test.name)
			}
			if cfg.Global.Zone != test.zone {
				t.Errorf("Incorrect zone value (%s vs %s) for case: %s",
					cfg.Global.Zone, test.zone, test.name)
			}
		}
	}
}

type FakeAWSServices struct {
	region                  string
	instances               []*ec2.Instance
	selfInstance            *ec2.Instance
	networkInterfacesMacs   []string
	networkInterfacesVpcIDs []string

	ec2      *FakeEC2
	elb      *FakeELB
	asg      *FakeASG
	metadata *FakeMetadata
}

func NewFakeAWSServices() *FakeAWSServices {
	s := &FakeAWSServices{}
	s.region = "us-east-1"
	s.ec2 = &FakeEC2{aws: s}
	s.elb = &FakeELB{aws: s}
	s.asg = &FakeASG{aws: s}
	s.metadata = &FakeMetadata{aws: s}

	s.networkInterfacesMacs = []string{"aa:bb:cc:dd:ee:00", "aa:bb:cc:dd:ee:01"}
	s.networkInterfacesVpcIDs = []string{"vpc-mac0", "vpc-mac1"}

	selfInstance := &ec2.Instance{}
	selfInstance.InstanceId = aws.String("i-self")
	selfInstance.Placement = &ec2.Placement{
		AvailabilityZone: aws.String("us-east-1a"),
	}
	selfInstance.PrivateDnsName = aws.String("ip-172-20-0-100.ec2.internal")
	selfInstance.PrivateIpAddress = aws.String("192.168.0.1")
	selfInstance.PublicIpAddress = aws.String("1.2.3.4")
	s.selfInstance = selfInstance
	s.instances = []*ec2.Instance{selfInstance}

	var tag ec2.Tag
	tag.Key = aws.String(TagNameKubernetesCluster)
	tag.Value = aws.String(TestClusterId)
	selfInstance.Tags = []*ec2.Tag{&tag}

	return s
}

func (s *FakeAWSServices) withAz(az string) *FakeAWSServices {
	if s.selfInstance.Placement == nil {
		s.selfInstance.Placement = &ec2.Placement{}
	}
	s.selfInstance.Placement.AvailabilityZone = aws.String(az)
	return s
}

func (s *FakeAWSServices) Compute(region string) (EC2, error) {
	return s.ec2, nil
}

func (s *FakeAWSServices) LoadBalancing(region string) (ELB, error) {
	return s.elb, nil
}

func (s *FakeAWSServices) Autoscaling(region string) (ASG, error) {
	return s.asg, nil
}

func (s *FakeAWSServices) Metadata() (EC2Metadata, error) {
	return s.metadata, nil
}

func TestFilterTags(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	if err != nil {
		t.Errorf("Error building aws cloud: %v", err)
		return
	}

	if len(c.filterTags) != 1 {
		t.Errorf("unexpected filter tags: %v", c.filterTags)
		return
	}

	if c.filterTags[TagNameKubernetesCluster] != TestClusterId {
		t.Errorf("unexpected filter tags: %v", c.filterTags)
	}
}

func TestNewAWSCloud(t *testing.T) {
	tests := []struct {
		name string

		reader      io.Reader
		awsServices Services

		expectError bool
		region      string
	}{
		{
			"No config reader",
			nil, NewFakeAWSServices().withAz(""),
			true, "",
		},
		{
			"Config specified invalid zone",
			strings.NewReader("[global]\nzone = blahonga"), NewFakeAWSServices(),
			true, "",
		},
		{
			"Config specifies valid zone",
			strings.NewReader("[global]\nzone = eu-west-1a"), NewFakeAWSServices(),
			false, "eu-west-1",
		},
		{
			"Gets zone from metadata when not in config",
			strings.NewReader("[global]\n"),
			NewFakeAWSServices(),
			false, "us-east-1",
		},
		{
			"No zone in config or metadata",
			strings.NewReader("[global]\n"),
			NewFakeAWSServices().withAz(""),
			true, "",
		},
	}

	for _, test := range tests {
		t.Logf("Running test case %s", test.name)
		c, err := newAWSCloud(test.reader, test.awsServices)
		if test.expectError {
			if err == nil {
				t.Errorf("Should error for case %s", test.name)
			}
		} else {
			if err != nil {
				t.Errorf("Should succeed for case: %s, got %v", test.name, err)
			} else if c.region != test.region {
				t.Errorf("Incorrect region value (%s vs %s) for case: %s",
					c.region, test.region, test.name)
			}
		}
	}
}

type FakeEC2 struct {
	aws                      *FakeAWSServices
	Subnets                  []*ec2.Subnet
	DescribeSubnetsInput     *ec2.DescribeSubnetsInput
	RouteTables              []*ec2.RouteTable
	DescribeRouteTablesInput *ec2.DescribeRouteTablesInput
	mock.Mock
}

func contains(haystack []*string, needle string) bool {
	for _, s := range haystack {
		// (deliberately panic if s == nil)
		if needle == *s {
			return true
		}
	}
	return false
}

func instanceMatchesFilter(instance *ec2.Instance, filter *ec2.Filter) bool {
	name := *filter.Name
	if name == "private-dns-name" {
		if instance.PrivateDnsName == nil {
			return false
		}
		return contains(filter.Values, *instance.PrivateDnsName)
	}

	if name == "instance-state-name" {
		return contains(filter.Values, *instance.State.Name)
	}

	if strings.HasPrefix(name, "tag:") {
		tagName := name[4:]
		for _, instanceTag := range instance.Tags {
			if aws.StringValue(instanceTag.Key) == tagName && contains(filter.Values, aws.StringValue(instanceTag.Value)) {
				return true
			}
		}
	}
	panic("Unknown filter name: " + name)
}

func (self *FakeEC2) DescribeInstances(request *ec2.DescribeInstancesInput) ([]*ec2.Instance, error) {
	matches := []*ec2.Instance{}
	for _, instance := range self.aws.instances {
		if request.InstanceIds != nil {
			if instance.InstanceId == nil {
				glog.Warning("Instance with no instance id: ", instance)
				continue
			}

			found := false
			for _, instanceID := range request.InstanceIds {
				if *instanceID == *instance.InstanceId {
					found = true
					break
				}
			}
			if !found {
				continue
			}
		}
		if request.Filters != nil {
			allMatch := true
			for _, filter := range request.Filters {
				if !instanceMatchesFilter(instance, filter) {
					allMatch = false
					break
				}
			}
			if !allMatch {
				continue
			}
		}
		matches = append(matches, instance)
	}

	return matches, nil
}

type FakeMetadata struct {
	aws *FakeAWSServices
}

func (self *FakeMetadata) GetMetadata(key string) (string, error) {
	networkInterfacesPrefix := "network/interfaces/macs/"
	i := self.aws.selfInstance
	if key == "placement/availability-zone" {
		az := ""
		if i.Placement != nil {
			az = aws.StringValue(i.Placement.AvailabilityZone)
		}
		return az, nil
	} else if key == "instance-id" {
		return aws.StringValue(i.InstanceId), nil
	} else if key == "local-hostname" {
		return aws.StringValue(i.PrivateDnsName), nil
	} else if key == "local-ipv4" {
		return aws.StringValue(i.PrivateIpAddress), nil
	} else if key == "public-ipv4" {
		return aws.StringValue(i.PublicIpAddress), nil
	} else if strings.HasPrefix(key, networkInterfacesPrefix) {
		if key == networkInterfacesPrefix {
			return strings.Join(self.aws.networkInterfacesMacs, "/\n") + "/\n", nil
		} else {
			keySplit := strings.Split(key, "/")
			macParam := keySplit[3]
			if len(keySplit) == 5 && keySplit[4] == "vpc-id" {
				for i, macElem := range self.aws.networkInterfacesMacs {
					if macParam == macElem {
						return self.aws.networkInterfacesVpcIDs[i], nil
					}
				}
			}
			return "", nil
		}
	} else {
		return "", nil
	}
}

func (ec2 *FakeEC2) AttachVolume(request *ec2.AttachVolumeInput) (resp *ec2.VolumeAttachment, err error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DetachVolume(request *ec2.DetachVolumeInput) (resp *ec2.VolumeAttachment, err error) {
	panic("Not implemented")
}

func (e *FakeEC2) DescribeVolumes(request *ec2.DescribeVolumesInput) ([]*ec2.Volume, error) {
	args := e.Called(request)
	return args.Get(0).([]*ec2.Volume), nil
}

func (ec2 *FakeEC2) CreateVolume(request *ec2.CreateVolumeInput) (resp *ec2.Volume, err error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DeleteVolume(request *ec2.DeleteVolumeInput) (resp *ec2.DeleteVolumeOutput, err error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DescribeSecurityGroups(request *ec2.DescribeSecurityGroupsInput) ([]*ec2.SecurityGroup, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) CreateSecurityGroup(*ec2.CreateSecurityGroupInput) (*ec2.CreateSecurityGroupOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DeleteSecurityGroup(*ec2.DeleteSecurityGroupInput) (*ec2.DeleteSecurityGroupOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) AuthorizeSecurityGroupIngress(*ec2.AuthorizeSecurityGroupIngressInput) (*ec2.AuthorizeSecurityGroupIngressOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) RevokeSecurityGroupIngress(*ec2.RevokeSecurityGroupIngressInput) (*ec2.RevokeSecurityGroupIngressOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DescribeSubnets(request *ec2.DescribeSubnetsInput) ([]*ec2.Subnet, error) {
	ec2.DescribeSubnetsInput = request
	return ec2.Subnets, nil
}

func (ec2 *FakeEC2) CreateTags(*ec2.CreateTagsInput) (*ec2.CreateTagsOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeEC2) DescribeRouteTables(request *ec2.DescribeRouteTablesInput) ([]*ec2.RouteTable, error) {
	ec2.DescribeRouteTablesInput = request
	return ec2.RouteTables, nil
}

func (s *FakeEC2) CreateRoute(request *ec2.CreateRouteInput) (*ec2.CreateRouteOutput, error) {
	panic("Not implemented")
}

func (s *FakeEC2) DeleteRoute(request *ec2.DeleteRouteInput) (*ec2.DeleteRouteOutput, error) {
	panic("Not implemented")
}

func (s *FakeEC2) ModifyInstanceAttribute(request *ec2.ModifyInstanceAttributeInput) (*ec2.ModifyInstanceAttributeOutput, error) {
	panic("Not implemented")
}

type FakeELB struct {
	aws *FakeAWSServices
	mock.Mock
}

func (ec2 *FakeELB) CreateLoadBalancer(*elb.CreateLoadBalancerInput) (*elb.CreateLoadBalancerOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) DeleteLoadBalancer(input *elb.DeleteLoadBalancerInput) (*elb.DeleteLoadBalancerOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) DescribeLoadBalancers(input *elb.DescribeLoadBalancersInput) (*elb.DescribeLoadBalancersOutput, error) {
	args := ec2.Called(input)
	return args.Get(0).(*elb.DescribeLoadBalancersOutput), nil
}
func (ec2 *FakeELB) RegisterInstancesWithLoadBalancer(*elb.RegisterInstancesWithLoadBalancerInput) (*elb.RegisterInstancesWithLoadBalancerOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) DeregisterInstancesFromLoadBalancer(*elb.DeregisterInstancesFromLoadBalancerInput) (*elb.DeregisterInstancesFromLoadBalancerOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) DetachLoadBalancerFromSubnets(*elb.DetachLoadBalancerFromSubnetsInput) (*elb.DetachLoadBalancerFromSubnetsOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) AttachLoadBalancerToSubnets(*elb.AttachLoadBalancerToSubnetsInput) (*elb.AttachLoadBalancerToSubnetsOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) CreateLoadBalancerListeners(*elb.CreateLoadBalancerListenersInput) (*elb.CreateLoadBalancerListenersOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) DeleteLoadBalancerListeners(*elb.DeleteLoadBalancerListenersInput) (*elb.DeleteLoadBalancerListenersOutput, error) {
	panic("Not implemented")
}

func (ec2 *FakeELB) ApplySecurityGroupsToLoadBalancer(*elb.ApplySecurityGroupsToLoadBalancerInput) (*elb.ApplySecurityGroupsToLoadBalancerOutput, error) {
	panic("Not implemented")
}

func (elb *FakeELB) ConfigureHealthCheck(*elb.ConfigureHealthCheckInput) (*elb.ConfigureHealthCheckOutput, error) {
	panic("Not implemented")
}

func (elb *FakeELB) CreateLoadBalancerPolicy(*elb.CreateLoadBalancerPolicyInput) (*elb.CreateLoadBalancerPolicyOutput, error) {
	panic("Not implemented")
}

func (elb *FakeELB) SetLoadBalancerPoliciesForBackendServer(*elb.SetLoadBalancerPoliciesForBackendServerInput) (*elb.SetLoadBalancerPoliciesForBackendServerOutput, error) {
	panic("Not implemented")
}

type FakeASG struct {
	aws *FakeAWSServices
}

func (a *FakeASG) UpdateAutoScalingGroup(*autoscaling.UpdateAutoScalingGroupInput) (*autoscaling.UpdateAutoScalingGroupOutput, error) {
	panic("Not implemented")
}

func (a *FakeASG) DescribeAutoScalingGroups(*autoscaling.DescribeAutoScalingGroupsInput) (*autoscaling.DescribeAutoScalingGroupsOutput, error) {
	panic("Not implemented")
}

func mockInstancesResp(selfInstance *ec2.Instance, instances []*ec2.Instance) (*Cloud, *FakeAWSServices) {
	awsServices := NewFakeAWSServices()
	awsServices.instances = instances
	awsServices.selfInstance = selfInstance
	awsCloud, err := newAWSCloud(nil, awsServices)
	if err != nil {
		panic(err)
	}
	return awsCloud, awsServices
}

func mockAvailabilityZone(availabilityZone string) *Cloud {
	awsServices := NewFakeAWSServices().withAz(availabilityZone)
	awsCloud, err := newAWSCloud(nil, awsServices)
	if err != nil {
		panic(err)
	}
	return awsCloud
}

func TestList(t *testing.T) {
	// TODO this setup is not very clean and could probably be improved
	var instance0 ec2.Instance
	var instance1 ec2.Instance
	var instance2 ec2.Instance
	var instance3 ec2.Instance

	//0
	tag0 := ec2.Tag{
		Key:   aws.String("Name"),
		Value: aws.String("foo"),
	}
	instance0.Tags = []*ec2.Tag{&tag0}
	instance0.InstanceId = aws.String("instance0")
	instance0.PrivateDnsName = aws.String("instance0.ec2.internal")
	instance0.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state0 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance0.State = &state0

	//1
	tag1 := ec2.Tag{
		Key:   aws.String("Name"),
		Value: aws.String("bar"),
	}
	instance1.Tags = []*ec2.Tag{&tag1}
	instance1.InstanceId = aws.String("instance1")
	instance1.PrivateDnsName = aws.String("instance1.ec2.internal")
	instance1.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state1 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance1.State = &state1

	//2
	tag2 := ec2.Tag{
		Key:   aws.String("Name"),
		Value: aws.String("baz"),
	}
	instance2.Tags = []*ec2.Tag{&tag2}
	instance2.InstanceId = aws.String("instance2")
	instance2.PrivateDnsName = aws.String("instance2.ec2.internal")
	instance2.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state2 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance2.State = &state2

	//3
	tag3 := ec2.Tag{
		Key:   aws.String("Name"),
		Value: aws.String("quux"),
	}
	instance3.Tags = []*ec2.Tag{&tag3}
	instance3.InstanceId = aws.String("instance3")
	instance3.PrivateDnsName = aws.String("instance3.ec2.internal")
	instance3.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state3 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance3.State = &state3

	instances := []*ec2.Instance{&instance0, &instance1, &instance2, &instance3}
	aws, _ := mockInstancesResp(&instance0, instances)

	table := []struct {
		input  string
		expect []string
	}{
		{"blahonga", []string{}},
		{"quux", []string{"instance3.ec2.internal"}},
		{"a", []string{"instance1.ec2.internal", "instance2.ec2.internal"}},
	}

	for _, item := range table {
		result, err := aws.List(item.input)
		if err != nil {
			t.Errorf("Expected call with %v to succeed, failed with %s", item.input, err)
		}
		if e, a := item.expect, result; !reflect.DeepEqual(e, a) {
			t.Errorf("Expected %v, got %v", e, a)
		}
	}
}

func testHasNodeAddress(t *testing.T, addrs []api.NodeAddress, addressType api.NodeAddressType, address string) {
	for _, addr := range addrs {
		if addr.Type == addressType && addr.Address == address {
			return
		}
	}
	t.Errorf("Did not find expected address: %s:%s in %v", addressType, address, addrs)
}

func TestNodeAddresses(t *testing.T) {
	// Note these instances have the same name
	// (we test that this produces an error)
	var instance0 ec2.Instance
	var instance1 ec2.Instance
	var instance2 ec2.Instance

	//0
	instance0.InstanceId = aws.String("i-0")
	instance0.PrivateDnsName = aws.String("instance-same.ec2.internal")
	instance0.PrivateIpAddress = aws.String("192.168.0.1")
	instance0.PublicIpAddress = aws.String("1.2.3.4")
	instance0.InstanceType = aws.String("c3.large")
	instance0.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state0 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance0.State = &state0

	//1
	instance1.InstanceId = aws.String("i-1")
	instance1.PrivateDnsName = aws.String("instance-same.ec2.internal")
	instance1.PrivateIpAddress = aws.String("192.168.0.2")
	instance1.InstanceType = aws.String("c3.large")
	instance1.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state1 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance1.State = &state1

	//2
	instance2.InstanceId = aws.String("i-2")
	instance2.PrivateDnsName = aws.String("instance-other.ec2.internal")
	instance2.PrivateIpAddress = aws.String("192.168.0.1")
	instance2.PublicIpAddress = aws.String("1.2.3.4")
	instance2.InstanceType = aws.String("c3.large")
	instance2.Placement = &ec2.Placement{AvailabilityZone: aws.String("us-east-1a")}
	state2 := ec2.InstanceState{
		Name: aws.String("running"),
	}
	instance2.State = &state2

	instances := []*ec2.Instance{&instance0, &instance1, &instance2}

	aws1, _ := mockInstancesResp(&instance0, []*ec2.Instance{&instance0})
	_, err1 := aws1.NodeAddresses("instance-mismatch.ec2.internal")
	if err1 == nil {
		t.Errorf("Should error when no instance found")
	}

	aws2, _ := mockInstancesResp(&instance2, instances)
	_, err2 := aws2.NodeAddresses("instance-same.ec2.internal")
	if err2 == nil {
		t.Errorf("Should error when multiple instances found")
	}

	aws3, _ := mockInstancesResp(&instance0, instances[0:1])
	addrs3, err3 := aws3.NodeAddresses("instance-same.ec2.internal")
	if err3 != nil {
		t.Errorf("Should not error when instance found")
	}
	if len(addrs3) != 3 {
		t.Errorf("Should return exactly 3 NodeAddresses")
	}
	testHasNodeAddress(t, addrs3, api.NodeInternalIP, "192.168.0.1")
	testHasNodeAddress(t, addrs3, api.NodeLegacyHostIP, "192.168.0.1")
	testHasNodeAddress(t, addrs3, api.NodeExternalIP, "1.2.3.4")

	// Fetch from metadata
	aws4, fakeServices := mockInstancesResp(&instance0, []*ec2.Instance{&instance0})
	fakeServices.selfInstance.PublicIpAddress = aws.String("2.3.4.5")
	fakeServices.selfInstance.PrivateIpAddress = aws.String("192.168.0.2")

	addrs4, err4 := aws4.NodeAddresses(*instance0.PrivateDnsName)
	if err4 != nil {
		t.Errorf("unexpected error: %v", err4)
	}
	testHasNodeAddress(t, addrs4, api.NodeInternalIP, "192.168.0.2")
	testHasNodeAddress(t, addrs4, api.NodeExternalIP, "2.3.4.5")
}

func TestGetRegion(t *testing.T) {
	aws := mockAvailabilityZone("us-west-2e")
	zones, ok := aws.Zones()
	if !ok {
		t.Fatalf("Unexpected missing zones impl")
	}
	zone, err := zones.GetZone()
	if err != nil {
		t.Fatalf("unexpected error %v", err)
	}
	if zone.Region != "us-west-2" {
		t.Errorf("Unexpected region: %s", zone.Region)
	}
	if zone.FailureDomain != "us-west-2e" {
		t.Errorf("Unexpected FailureDomain: %s", zone.FailureDomain)
	}
}

func TestFindVPCID(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	if err != nil {
		t.Errorf("Error building aws cloud: %v", err)
		return
	}
	vpcID, err := c.findVPCID()
	if err != nil {
		t.Errorf("Unexpected error: %v", err)
	}
	if vpcID != "vpc-mac0" {
		t.Errorf("Unexpected vpcID: %s", vpcID)
	}
}

func constructSubnets(subnetsIn map[int]map[string]string) (subnetsOut []*ec2.Subnet) {
	for i := range subnetsIn {
		subnetsOut = append(
			subnetsOut,
			constructSubnet(
				subnetsIn[i]["id"],
				subnetsIn[i]["az"],
			),
		)
	}
	return
}

func constructSubnet(id string, az string) *ec2.Subnet {
	return &ec2.Subnet{
		SubnetId:         &id,
		AvailabilityZone: &az,
	}
}

func constructRouteTables(routeTablesIn map[string]bool) (routeTablesOut []*ec2.RouteTable) {
	routeTablesOut = append(routeTablesOut,
		&ec2.RouteTable{
			Associations: []*ec2.RouteTableAssociation{{Main: aws.Bool(true)}},
			Routes: []*ec2.Route{{
				DestinationCidrBlock: aws.String("0.0.0.0/0"),
				GatewayId:            aws.String("igw-main"),
			}},
		})

	for subnetID := range routeTablesIn {
		routeTablesOut = append(
			routeTablesOut,
			constructRouteTable(
				subnetID,
				routeTablesIn[subnetID],
			),
		)
	}
	return
}

func constructRouteTable(subnetID string, public bool) *ec2.RouteTable {
	var gatewayID string
	if public {
		gatewayID = "igw-" + subnetID[len(subnetID)-8:8]
	} else {
		gatewayID = "vgw-" + subnetID[len(subnetID)-8:8]
	}
	return &ec2.RouteTable{
		Associations: []*ec2.RouteTableAssociation{{SubnetId: aws.String(subnetID)}},
		Routes: []*ec2.Route{{
			DestinationCidrBlock: aws.String("0.0.0.0/0"),
			GatewayId:            aws.String(gatewayID),
		}},
	}
}

func TestSubnetIDsinVPC(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	if err != nil {
		t.Errorf("Error building aws cloud: %v", err)
		return
	}

	// test with 3 subnets from 3 different AZs
	subnets := make(map[int]map[string]string)
	subnets[0] = make(map[string]string)
	subnets[0]["id"] = "subnet-a0000001"
	subnets[0]["az"] = "af-south-1a"
	subnets[1] = make(map[string]string)
	subnets[1]["id"] = "subnet-b0000001"
	subnets[1]["az"] = "af-south-1b"
	subnets[2] = make(map[string]string)
	subnets[2]["id"] = "subnet-c0000001"
	subnets[2]["az"] = "af-south-1c"
	awsServices.ec2.Subnets = constructSubnets(subnets)

	routeTables := map[string]bool{
		"subnet-a0000001": true,
		"subnet-b0000001": true,
		"subnet-c0000001": true,
	}
	awsServices.ec2.RouteTables = constructRouteTables(routeTables)

	result, err := c.findELBSubnets(false)
	if err != nil {
		t.Errorf("Error listing subnets: %v", err)
		return
	}

	if len(result) != 3 {
		t.Errorf("Expected 3 subnets but got %d", len(result))
		return
	}

	result_set := make(map[string]bool)
	for _, v := range result {
		result_set[v] = true
	}

	for i := range subnets {
		if !result_set[subnets[i]["id"]] {
			t.Errorf("Expected subnet%d '%s' in result: %v", i, subnets[i]["id"], result)
			return
		}
	}

	// test implicit routing table - when subnets are not explicitly linked to a table they should use main
	awsServices.ec2.RouteTables = constructRouteTables(map[string]bool{})

	result, err = c.findELBSubnets(false)
	if err != nil {
		t.Errorf("Error listing subnets: %v", err)
		return
	}

	if len(result) != 3 {
		t.Errorf("Expected 3 subnets but got %d", len(result))
		return
	}

	result_set = make(map[string]bool)
	for _, v := range result {
		result_set[v] = true
	}

	for i := range subnets {
		if !result_set[subnets[i]["id"]] {
			t.Errorf("Expected subnet%d '%s' in result: %v", i, subnets[i]["id"], result)
			return
		}
	}

	// test with 4 subnets from 3 different AZs
	// add duplicate az subnet
	subnets[3] = make(map[string]string)
	subnets[3]["id"] = "subnet-c0000002"
	subnets[3]["az"] = "af-south-1c"
	awsServices.ec2.Subnets = constructSubnets(subnets)
	routeTables["subnet-c0000002"] = true
	awsServices.ec2.RouteTables = constructRouteTables(routeTables)

	result, err = c.findELBSubnets(false)
	if err != nil {
		t.Errorf("Error listing subnets: %v", err)
		return
	}

	if len(result) != 3 {
		t.Errorf("Expected 3 subnets but got %d", len(result))
		return
	}

	// test with 6 subnets from 3 different AZs
	// with 3 private subnets
	subnets[4] = make(map[string]string)
	subnets[4]["id"] = "subnet-d0000001"
	subnets[4]["az"] = "af-south-1a"
	subnets[5] = make(map[string]string)
	subnets[5]["id"] = "subnet-d0000002"
	subnets[5]["az"] = "af-south-1b"

	awsServices.ec2.Subnets = constructSubnets(subnets)
	routeTables["subnet-a0000001"] = false
	routeTables["subnet-b0000001"] = false
	routeTables["subnet-c0000001"] = false
	routeTables["subnet-c0000002"] = true
	routeTables["subnet-d0000001"] = true
	routeTables["subnet-d0000002"] = true
	awsServices.ec2.RouteTables = constructRouteTables(routeTables)
	result, err = c.findELBSubnets(false)
	if err != nil {
		t.Errorf("Error listing subnets: %v", err)
		return
	}

	if len(result) != 3 {
		t.Errorf("Expected 3 subnets but got %d", len(result))
		return
	}

	expected := []*string{aws.String("subnet-c0000002"), aws.String("subnet-d0000001"), aws.String("subnet-d0000002")}
	for _, s := range result {
		if !contains(expected, s) {
			t.Errorf("Unexpected subnet '%s' found", s)
			return
		}
	}
}

func TestIpPermissionExistsHandlesMultipleGroupIds(t *testing.T) {
	oldIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("firstGroupId")},
			{GroupId: aws.String("secondGroupId")},
			{GroupId: aws.String("thirdGroupId")},
		},
	}

	existingIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("secondGroupId")},
		},
	}

	newIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("fourthGroupId")},
		},
	}

	equals := ipPermissionExists(&existingIpPermission, &oldIpPermission, false)
	if !equals {
		t.Errorf("Should have been considered equal since first is in the second array of groups")
	}

	equals = ipPermissionExists(&newIpPermission, &oldIpPermission, false)
	if equals {
		t.Errorf("Should have not been considered equal since first is not in the second array of groups")
	}
}

func TestIpPermissionExistsHandlesRangeSubsets(t *testing.T) {
	// Two existing scenarios we'll test against
	emptyIpPermission := ec2.IpPermission{}

	oldIpPermission := ec2.IpPermission{
		IpRanges: []*ec2.IpRange{
			{CidrIp: aws.String("10.0.0.0/8")},
			{CidrIp: aws.String("192.168.1.0/24")},
		},
	}

	// Two already existing ranges and a new one
	existingIpPermission := ec2.IpPermission{
		IpRanges: []*ec2.IpRange{
			{CidrIp: aws.String("10.0.0.0/8")},
		},
	}
	existingIpPermission2 := ec2.IpPermission{
		IpRanges: []*ec2.IpRange{
			{CidrIp: aws.String("192.168.1.0/24")},
		},
	}

	newIpPermission := ec2.IpPermission{
		IpRanges: []*ec2.IpRange{
			{CidrIp: aws.String("172.16.0.0/16")},
		},
	}

	exists := ipPermissionExists(&emptyIpPermission, &emptyIpPermission, false)
	if !exists {
		t.Errorf("Should have been considered existing since we're comparing a range array against itself")
	}
	exists = ipPermissionExists(&oldIpPermission, &oldIpPermission, false)
	if !exists {
		t.Errorf("Should have been considered existing since we're comparing a range array against itself")
	}

	exists = ipPermissionExists(&existingIpPermission, &oldIpPermission, false)
	if !exists {
		t.Errorf("Should have been considered existing since 10.* is in oldIpPermission's array of ranges")
	}
	exists = ipPermissionExists(&existingIpPermission2, &oldIpPermission, false)
	if !exists {
		t.Errorf("Should have been considered existing since 192.* is in oldIpPermission2's array of ranges")
	}

	exists = ipPermissionExists(&newIpPermission, &emptyIpPermission, false)
	if exists {
		t.Errorf("Should have not been considered existing since we compared against a missing array of ranges")
	}
	exists = ipPermissionExists(&newIpPermission, &oldIpPermission, false)
	if exists {
		t.Errorf("Should have not been considered existing since 172.* is not in oldIpPermission's array of ranges")
	}
}

func TestIpPermissionExistsHandlesMultipleGroupIdsWithUserIds(t *testing.T) {
	oldIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("firstGroupId"), UserId: aws.String("firstUserId")},
			{GroupId: aws.String("secondGroupId"), UserId: aws.String("secondUserId")},
			{GroupId: aws.String("thirdGroupId"), UserId: aws.String("thirdUserId")},
		},
	}

	existingIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("secondGroupId"), UserId: aws.String("secondUserId")},
		},
	}

	newIpPermission := ec2.IpPermission{
		UserIdGroupPairs: []*ec2.UserIdGroupPair{
			{GroupId: aws.String("secondGroupId"), UserId: aws.String("anotherUserId")},
		},
	}

	equals := ipPermissionExists(&existingIpPermission, &oldIpPermission, true)
	if !equals {
		t.Errorf("Should have been considered equal since first is in the second array of groups")
	}

	equals = ipPermissionExists(&newIpPermission, &oldIpPermission, true)
	if equals {
		t.Errorf("Should have not been considered equal since first is not in the second array of groups")
	}
}
func TestFindInstanceByNodeNameExcludesTerminatedInstances(t *testing.T) {
	awsServices := NewFakeAWSServices()

	nodeName := "my-dns.internal"

	var tag ec2.Tag
	tag.Key = aws.String(TagNameKubernetesCluster)
	tag.Value = aws.String(TestClusterId)
	tags := []*ec2.Tag{&tag}

	var runningInstance ec2.Instance
	runningInstance.InstanceId = aws.String("i-running")
	runningInstance.PrivateDnsName = aws.String(nodeName)
	runningInstance.State = &ec2.InstanceState{Code: aws.Int64(16), Name: aws.String("running")}
	runningInstance.Tags = tags

	var terminatedInstance ec2.Instance
	terminatedInstance.InstanceId = aws.String("i-terminated")
	terminatedInstance.PrivateDnsName = aws.String(nodeName)
	terminatedInstance.State = &ec2.InstanceState{Code: aws.Int64(48), Name: aws.String("terminated")}
	terminatedInstance.Tags = tags

	instances := []*ec2.Instance{&terminatedInstance, &runningInstance}
	awsServices.instances = append(awsServices.instances, instances...)

	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	if err != nil {
		t.Errorf("Error building aws cloud: %v", err)
		return
	}

	instance, err := c.findInstanceByNodeName(nodeName)

	if err != nil {
		t.Errorf("Failed to find instance: %v", err)
		return
	}

	if *instance.InstanceId != "i-running" {
		t.Errorf("Expected running instance but got %v", *instance.InstanceId)
	}
}

func TestFindInstancesByNodeNameCached(t *testing.T) {
	awsServices := NewFakeAWSServices()

	nodeNameOne := "my-dns.internal"
	nodeNameTwo := "my-dns-two.internal"

	var tag ec2.Tag
	tag.Key = aws.String(TagNameKubernetesCluster)
	tag.Value = aws.String(TestClusterId)
	tags := []*ec2.Tag{&tag}

	var runningInstance ec2.Instance
	runningInstance.InstanceId = aws.String("i-running")
	runningInstance.PrivateDnsName = aws.String(nodeNameOne)
	runningInstance.State = &ec2.InstanceState{Code: aws.Int64(16), Name: aws.String("running")}
	runningInstance.Tags = tags

	var secondInstance ec2.Instance

	secondInstance.InstanceId = aws.String("i-running")
	secondInstance.PrivateDnsName = aws.String(nodeNameTwo)
	secondInstance.State = &ec2.InstanceState{Code: aws.Int64(48), Name: aws.String("running")}
	secondInstance.Tags = tags

	var terminatedInstance ec2.Instance
	terminatedInstance.InstanceId = aws.String("i-terminated")
	terminatedInstance.PrivateDnsName = aws.String(nodeNameOne)
	terminatedInstance.State = &ec2.InstanceState{Code: aws.Int64(48), Name: aws.String("terminated")}
	terminatedInstance.Tags = tags

	instances := []*ec2.Instance{&secondInstance, &runningInstance, &terminatedInstance}
	awsServices.instances = append(awsServices.instances, instances...)

	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	if err != nil {
		t.Errorf("Error building aws cloud: %v", err)
		return
	}

	nodeNames := sets.NewString(nodeNameOne)
	returnedInstances, errr := c.getInstancesByNodeNamesCached(nodeNames)

	if errr != nil {
		t.Errorf("Failed to find instance: %v", err)
		return
	}

	if len(returnedInstances) != 1 {
		t.Errorf("Expected a single isntance but found: %v", returnedInstances)
	}

	if *returnedInstances[0].PrivateDnsName != nodeNameOne {
		t.Errorf("Expected node name %v but got %v", nodeNameOne, returnedInstances[0].PrivateDnsName)
	}
}

func TestGetVolumeLabels(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, err := newAWSCloud(strings.NewReader("[global]"), awsServices)
	assert.Nil(t, err, "Error building aws cloud: %v", err)
	volumeId := aws.String("vol-VolumeId")
	expectedVolumeRequest := &ec2.DescribeVolumesInput{VolumeIds: []*string{volumeId}}
	awsServices.ec2.On("DescribeVolumes", expectedVolumeRequest).Return([]*ec2.Volume{
		{
			VolumeId:         volumeId,
			AvailabilityZone: aws.String("us-east-1a"),
		},
	})

	labels, err := c.GetVolumeLabels(*volumeId)

	assert.Nil(t, err, "Error creating Volume %v", err)
	assert.Equal(t, map[string]string{
		unversioned.LabelZoneFailureDomain: "us-east-1a",
		unversioned.LabelZoneRegion:        "us-east-1"}, labels)
	awsServices.ec2.AssertExpectations(t)
}

func (self *FakeELB) expectDescribeLoadBalancers(loadBalancerName string) {
	self.On("DescribeLoadBalancers", &elb.DescribeLoadBalancersInput{LoadBalancerNames: []*string{aws.String(loadBalancerName)}}).Return(&elb.DescribeLoadBalancersOutput{
		LoadBalancerDescriptions: []*elb.LoadBalancerDescription{{}},
	})
}

func TestDescribeLoadBalancerOnDelete(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, _ := newAWSCloud(strings.NewReader("[global]"), awsServices)
	awsServices.elb.expectDescribeLoadBalancers("aid")

	c.EnsureLoadBalancerDeleted(&api.Service{ObjectMeta: api.ObjectMeta{Name: "myservice", UID: "id"}})
}

func TestDescribeLoadBalancerOnUpdate(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, _ := newAWSCloud(strings.NewReader("[global]"), awsServices)
	awsServices.elb.expectDescribeLoadBalancers("aid")

	c.UpdateLoadBalancer(&api.Service{ObjectMeta: api.ObjectMeta{Name: "myservice", UID: "id"}}, []string{})
}

func TestDescribeLoadBalancerOnGet(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, _ := newAWSCloud(strings.NewReader("[global]"), awsServices)
	awsServices.elb.expectDescribeLoadBalancers("aid")

	c.GetLoadBalancer(&api.Service{ObjectMeta: api.ObjectMeta{Name: "myservice", UID: "id"}})
}

func TestDescribeLoadBalancerOnEnsure(t *testing.T) {
	awsServices := NewFakeAWSServices()
	c, _ := newAWSCloud(strings.NewReader("[global]"), awsServices)
	awsServices.elb.expectDescribeLoadBalancers("aid")

	c.EnsureLoadBalancer(&api.Service{ObjectMeta: api.ObjectMeta{Name: "myservice", UID: "id"}}, []string{})
}

func TestBuildListener(t *testing.T) {
	tests := []struct {
		name string

		lbPort                    int64
		portName                  string
		instancePort              int64
		backendProtocolAnnotation string
		certAnnotation            string
		sslPortAnnotation         string

		expectError      bool
		lbProtocol       string
		instanceProtocol string
		certID           string
	}{
		{
			"No cert or BE protocol annotation, passthrough",
			80, "", 7999, "", "", "",
			false, "tcp", "tcp", "",
		},
		{
			"Cert annotation without BE protocol specified, SSL->TCP",
			80, "", 8000, "", "cert", "",
			false, "ssl", "tcp", "cert",
		},
		{
			"BE protocol without cert annotation, passthrough",
			443, "", 8001, "https", "", "",
			false, "tcp", "tcp", "",
		},
		{
			"Invalid cert annotation, bogus backend protocol",
			443, "", 8002, "bacon", "foo", "",
			true, "tcp", "tcp", "",
		},
		{
			"Invalid cert annotation, protocol followed by equal sign",
			443, "", 8003, "http=", "=", "",
			true, "tcp", "tcp", "",
		},
		{
			"HTTPS->HTTPS",
			443, "", 8004, "https", "cert", "",
			false, "https", "https", "cert",
		},
		{
			"HTTPS->HTTP",
			443, "", 8005, "http", "cert", "",
			false, "https", "http", "cert",
		},
		{
			"SSL->SSL",
			443, "", 8006, "ssl", "cert", "",
			false, "ssl", "ssl", "cert",
		},
		{
			"SSL->TCP",
			443, "", 8007, "tcp", "cert", "",
			false, "ssl", "tcp", "cert",
		},
		{
			"Port in whitelist",
			1234, "", 8008, "tcp", "cert", "1234,5678",
			false, "ssl", "tcp", "cert",
		},
		{
			"Port not in whitelist, passthrough",
			443, "", 8009, "tcp", "cert", "1234,5678",
			false, "tcp", "tcp", "",
		},
		{
			"Named port in whitelist",
			1234, "bar", 8010, "tcp", "cert", "foo,bar",
			false, "ssl", "tcp", "cert",
		},
		{
			"Named port not in whitelist, passthrough",
			443, "", 8011, "tcp", "cert", "foo,bar",
			false, "tcp", "tcp", "",
		},
	}

	for _, test := range tests {
		t.Logf("Running test case %s", test.name)
		annotations := make(map[string]string)
		if test.backendProtocolAnnotation != "" {
			annotations[ServiceAnnotationLoadBalancerBEProtocol] = test.backendProtocolAnnotation
		}
		if test.certAnnotation != "" {
			annotations[ServiceAnnotationLoadBalancerCertificate] = test.certAnnotation
		}
		ports := getPortSets(test.sslPortAnnotation)
		l, err := buildListener(api.ServicePort{
			NodePort: int32(test.instancePort),
			Port:     int32(test.lbPort),
			Name:     test.portName,
			Protocol: api.Protocol("tcp"),
		}, annotations, ports)
		if test.expectError {
			if err == nil {
				t.Errorf("Should error for case %s", test.name)
			}
		} else {
			if err != nil {
				t.Errorf("Should succeed for case: %s, got %v", test.name, err)
			} else {
				var cert *string
				if test.certID != "" {
					cert = &test.certID
				}
				expected := &elb.Listener{
					InstancePort:     &test.instancePort,
					InstanceProtocol: &test.instanceProtocol,
					LoadBalancerPort: &test.lbPort,
					Protocol:         &test.lbProtocol,
					SSLCertificateId: cert,
				}
				if !reflect.DeepEqual(l, expected) {
					t.Errorf("Incorrect listener (%v vs expected %v) for case: %s",
						l, expected, test.name)
				}
			}
		}
	}
}

func TestProxyProtocolEnabled(t *testing.T) {
	policies := sets.NewString(ProxyProtocolPolicyName, "FooBarFoo")
	fakeBackend := &elb.BackendServerDescription{
		InstancePort: aws.Int64(80),
		PolicyNames:  stringSetToPointers(policies),
	}
	result := proxyProtocolEnabled(fakeBackend)
	assert.True(t, result, "expected to find %s in %s", ProxyProtocolPolicyName, policies)

	policies = sets.NewString("FooBarFoo")
	fakeBackend = &elb.BackendServerDescription{
		InstancePort: aws.Int64(80),
		PolicyNames: []*string{
			aws.String("FooBarFoo"),
		},
	}
	result = proxyProtocolEnabled(fakeBackend)
	assert.False(t, result, "did not expect to find %s in %s", ProxyProtocolPolicyName, policies)

	policies = sets.NewString()
	fakeBackend = &elb.BackendServerDescription{
		InstancePort: aws.Int64(80),
	}
	result = proxyProtocolEnabled(fakeBackend)
	assert.False(t, result, "did not expect to find %s in %s", ProxyProtocolPolicyName, policies)
}