import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"net"
	"net/url"
	"os"
	"strings"

	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	xdsstatus "github.com/envoyproxy/go-control-plane/envoy/service/status/v3"
	"google.golang.org/grpc"
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	"istio.io/api/label"

	matcher "github.com/cncf/xds/go/xds/type/matcher/v3"
	listener "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
	route "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
	hcm "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
	tcp "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/tcp_proxy/v3"
	"sigs.k8s.io/yaml"

	var opts clioptions.ControlPlaneOptions
	cmd := &cobra.Command{
		Use:   "controlz [<type>/]<name>[.<namespace>]",
		Short: "Open ControlZ web UI",
		Long:  `Open the ControlZ web UI for a pod in the Istio control plane`,
		Example: `  # Open ControlZ web UI for the istiod-123-456.istio-system pod
  istioctl dashboard controlz istiod-123-456.istio-system

  # Open ControlZ web UI for the istiod-56dd66799-jfdvs pod in a custom namespace

		var icpTag string
		// create normalized tags for multiple control plane revisions
		for _, icp := range *icps {
			if icp.Revision != revision {
				continue
			}
			tagVer, err := GetTagVersion(icp.Info.GitTag)
			if err != nil {
				return err
			}
			icpTags = append(icpTags, tagVer)
		}
		// sort different versions of control plane revisions
		sort.Strings(icpTags)

	overrideHelpStr = `If true, allow revision tags to be overwritten, otherwise reject revision tag updates that
overwrite existing revision tags.`
	revisionHelpStr = "Control plane revision to reference from a given revision tag"
	tagCreatedStr   = `Revision tag %q created, referencing control plane revision %q. To enable injection using this
revision tag, use 'kubectl label namespace <NAMESPACE> istio.io/rev=%s'
`

	if err != nil {
		return "", err
	}
	if !opts.Generate && !opts.Overwrite &&
		len(revWebhookCollisions) > 0 && opts.Tag != DefaultRevisionName {
		return "", fmt.Errorf("cannot create revision tag %q: found existing control plane revision with same name", opts.Tag)
	}

	// find canonical revision webhook to base our tag webhook off of
	revWebhooks, err := GetWebhooksWithRevision(ctx, client.Kube(), opts.Revision)
	if err != nil {

					return errors.New(e)
				}
			}
			return nil
		},
	}
	cmd.PersistentFlags().BoolVar(&skipControlPlane, "skip-controlplane", false, "skip checking the control plane")
	cmd.PersistentFlags().Var(&outputThreshold, "output-threshold",
		fmt.Sprintf("The severity level of precheck at which to display messages. Valid values: %v", diag.GetAllLevelStrings()))

		Example: `  # Retrieve information about istiod logging levels.
  istioctl admin log

  # Retrieve information about istiod logging levels on a specific control plane pod.
  istioctl admin l istiod-5c868d8bdd-pmvgg

  # Update levels of the specified loggers.
  istioctl admin log --level ads:debug,authorization:debug

				if err == nil {
					c.error = "no longer used"
					c.status = scanStateError
					rpc.UpdateMetacacheListing(ctx, *c)
				}
			}
		}()
		o.ID = ""
	}

	// Do listing in-place.
	// Create output for our results.
	// Create filter for results.
	o.debugln("Raw List", o)
	filterCh := make(chan metaCacheEntry, o.Limit)
	listCtx, cancelList := context.WithCancel(ctx)

		for _, host := range globalEndpoints.Hostnames() {
			domainIPs.Add(host)
		}
		updateDomainIPs(domainIPs)
	}

	// In place update is true by default if the MINIO_UPDATE is not set
	// or is not set to 'off', if MINIO_UPDATE is set to 'off' then
	// in-place update is off.
	globalInplaceUpdateDisabled = strings.EqualFold(env.Get(config.EnvUpdate, config.EnableOn), config.EnableOff)