func (f *Finder) NetworkList(ctx context.Context, path string) ([]object.NetworkReference, error) {
	es, err := f.find(ctx, f.networkFolder, false, path)
	if err != nil {
		return nil, err
	}

	var ns []object.NetworkReference
	for _, e := range es {
		ref := e.Object.Reference()
		switch ref.Type {
		case "Network":
			r := object.NewNetwork(f.client, ref)
			r.InventoryPath = e.Path
			ns = append(ns, r)
		case "DistributedVirtualPortgroup":
			r := object.NewDistributedVirtualPortgroup(f.client, ref)
			r.InventoryPath = e.Path
			ns = append(ns, r)
		case "DistributedVirtualSwitch", "VmwareDistributedVirtualSwitch":
			r := object.NewDistributedVirtualSwitch(f.client, ref)
			r.InventoryPath = e.Path
			ns = append(ns, r)
		}
	}

	if len(ns) == 0 {
		return nil, &NotFoundError{"network", path}
	}

	return ns, nil
}

// isDVSUplink determines if the DVP is an uplink
func (v *Validator) isDVSUplink(ref types.ManagedObjectReference) bool {
	defer trace.End(trace.Begin(ref.Value))

	var dvp mo.DistributedVirtualPortgroup

	r := object.NewDistributedVirtualPortgroup(v.Session.Client.Client, ref)
	if err := r.Properties(v.Context, r.Reference(), []string{"tag"}, &dvp); err != nil {
		log.Errorf("Unable to check tags on %q: %s", ref, err)
		return false
	}
	for _, t := range dvp.Tag {
		if strings.Contains(t.Key, "UPLINKPG") {
			return true
		}
	}
	return false
}

func (vm *VirtualMachine) getNetworkName(ctx context.Context, nic types.BaseVirtualEthernetCard) (string, error) {
	if card, ok := nic.GetVirtualEthernetCard().Backing.(*types.VirtualEthernetCardDistributedVirtualPortBackingInfo); ok {
		pg := card.Port.PortgroupKey
		pgref := object.NewDistributedVirtualPortgroup(vm.Session.Client.Client, types.ManagedObjectReference{
			Type:  "DistributedVirtualPortgroup",
			Value: pg,
		})

		var pgo mo.DistributedVirtualPortgroup
		err := pgref.Properties(ctx, pgref.Reference(), []string{"config"}, &pgo)
		if err != nil {
			log.Errorf("Failed to query portgroup %s for %s", pg, err)
			return "", err
		}
		return pgo.Config.Name, nil
	}
	return nic.GetVirtualEthernetCard().DeviceInfo.GetDescription().Summary, nil
}

func (f *Finder) DVSWSList(ctx context.Context, path string, recursive bool) ([]object.DistributedVirtualPortgroup, error) {
	es, err := f.find(ctx, f.networkFolder, recursive, path)
	if err != nil {
		return nil, err
	}

	var ns []object.DistributedVirtualPortgroup
	for _, e := range es {
		ref := e.Object.Reference()
		switch ref.Type {
		case "DistributedVirtualPortgroup":
			r := object.NewDistributedVirtualPortgroup(f.client, ref)
			r.InventoryPath = e.Path
			ns = append(ns, *r)
		}
	}
	return ns, nil
}

// checkVDSMembership verifes all hosts in the vCenter are connected to the vDS
func (v *Validator) checkVDSMembership(ctx context.Context, network types.ManagedObjectReference, netName string) error {
	defer trace.End(trace.Begin(network.Value))

	var dvp mo.DistributedVirtualPortgroup
	var nonMembers []string

	if !v.IsVC() {
		return nil
	}

	if v.Session.Cluster == nil {
		return errors.New("Invalid cluster. Check --compute-resource")
	}

	clusterHosts, err := v.Session.Cluster.Hosts(ctx)
	if err != nil {
		return err
	}

	r := object.NewDistributedVirtualPortgroup(v.Session.Client.Client, network)
	if err := r.Properties(ctx, r.Reference(), []string{"name", "host"}, &dvp); err != nil {
		return err
	}

	for _, h := range clusterHosts {
		if !v.inDVP(h.Reference(), dvp.Host) {
			nonMembers = append(nonMembers, h.InventoryPath)
		}
	}

	if len(nonMembers) > 0 {
		log.Errorf("vDS configuration incorrect on %q. All cluster hosts must be in the vDS.", netName)
		log.Errorf("  %q is missing hosts:", netName)
		for _, hs := range nonMembers {
			log.Errorf("    %q", hs)
		}

		errMsg := fmt.Sprintf("All cluster hosts must be in the vDS. %q is missing hosts: %s", netName, nonMembers)
		v.NoteIssue(errors.New(errMsg))
	} else {
		log.Infof("vDS configuration OK on %q", netName)
	}
	return nil
}

func (cmd *info) Run(ctx context.Context, f *flag.FlagSet) error {
	host, err := cmd.HostSystem()
	if err != nil {
		return err
	}

	ns, err := cmd.HostNetworkSystem()
	if err != nil {
		return err
	}

	var mns mo.HostNetworkSystem

	m, err := host.ConfigManager().VirtualNicManager(ctx)
	if err != nil {
		return err
	}

	info, err := m.Info(ctx)
	if err != nil {
		return err
	}

	err = ns.Properties(ctx, ns.Reference(), []string{"networkInfo"}, &mns)
	if err != nil {
		return err
	}

	tw := tabwriter.NewWriter(os.Stdout, 2, 0, 2, ' ', 0)

	type dnet struct {
		dvp mo.DistributedVirtualPortgroup
		dvs mo.VmwareDistributedVirtualSwitch
	}

	dnets := make(map[string]*dnet)

	for _, nic := range mns.NetworkInfo.Vnic {
		fmt.Fprintf(tw, "Device:\t%s\n", nic.Device)

		if dvp := nic.Spec.DistributedVirtualPort; dvp != nil {
			dn, ok := dnets[dvp.PortgroupKey]

			if !ok {
				dn = new(dnet)
				o := object.NewDistributedVirtualPortgroup(host.Client(), types.ManagedObjectReference{
					Type:  "DistributedVirtualPortgroup",
					Value: dvp.PortgroupKey,
				})

				err = o.Properties(ctx, o.Reference(), []string{"name", "config.distributedVirtualSwitch"}, &dn.dvp)
				if err != nil {
					return err
				}

				err = o.Properties(ctx, *dn.dvp.Config.DistributedVirtualSwitch, []string{"name"}, &dn.dvs)
				if err != nil {
					return err
				}

				dnets[dvp.PortgroupKey] = dn
			}

			fmt.Fprintf(tw, "Network label:\t%s\n", dn.dvp.Name)
			fmt.Fprintf(tw, "Switch:\t%s\n", dn.dvs.Name)
		} else {
			fmt.Fprintf(tw, "Network label:\t%s\n", nic.Portgroup)
			for _, pg := range mns.NetworkInfo.Portgroup {
				if pg.Spec.Name == nic.Portgroup {
					fmt.Fprintf(tw, "Switch:\t%s\n", pg.Spec.VswitchName)
					break
				}
			}
		}

		fmt.Fprintf(tw, "IP address:\t%s\n", nic.Spec.Ip.IpAddress)
		fmt.Fprintf(tw, "TCP/IP stack:\t%s\n", nic.Spec.NetStackInstanceKey)

		var services []string
		for _, nc := range info.NetConfig {
			for _, dev := range nc.SelectedVnic {
				key := nc.NicType + "." + nic.Key
				if dev == key {
					services = append(services, nc.NicType)
				}
			}

		}
		fmt.Fprintf(tw, "Enabled services:\t%s\n", strings.Join(services, ", "))
	}

	return tw.Flush()
}