// 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 xds

// xds uses ADSC to call XDS

import (
	"context"
	"crypto/tls"
	"fmt"
	"strings"

	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	"google.golang.org/grpc"

)

// CentralControlPlaneOptions holds options common to all subcommands
// that invoke Istiod via xDS REST endpoint
type CentralControlPlaneOptions struct {
	// Xds is XDS endpoint, e.g. localhost:15010.
	Xds string

	// XdsPodLabel is a Kubernetes label on the Istiod pods
	XdsPodLabel string

	// XdsPodPort is a port exposing XDS (typically 15010 or 15012)
	XdsPodPort int

	// CertDir is the local directory containing certificates

		}
		err = fw.Start()
		if err != nil {
			return nil, err
		}
		defer fw.Close()
		xdsOpts.Xds = fw.Address()
		// Use plaintext.
		response, err := xds.GetXdsResponse(dr, istioNamespace, tokenServiceAccount, xdsOpts, []grpc.DialOption{})
		if err != nil {
			return nil, fmt.Errorf("could not get XDS from the agent pod %q: %v", pod.Name, err)
		}
		for _, resource := range response.GetResources() {

insecure                                 default
istioNamespace          istio-system     default
plaintext                                default
prefer-experimental                      default
xds-address                              default
xds-port                15012            default
`,
			WantException: false,
		},
	}

	for i, c := range cases {

  istioctl ps --xds-address istio.example.com:15012 --cert-dir ~/.istio-certs

  # Retrieve proxy status information via XDS from specific control plane in multi-control plane in-cluster configuration
  # (Select a specific control plane in an in-cluster canary Istio configuration.)
  istioctl ps --xds-label istio.io/rev=default
`,
		Aliases: []string{"ps"},

	"istioNamespace":      env.Register("ISTIOCTL_ISTIONAMESPACE", constants.IstioSystemNamespace, "The istioctl --istioNamespace override"),
	"xds-address":         env.Register("ISTIOCTL_XDS_ADDRESS", "", "The istioctl --xds-address override"),
	"xds-port":            env.Register("ISTIOCTL_XDS_PORT", 15012, "The istioctl --xds-port override"),
	"authority":           env.Register("ISTIOCTL_AUTHORITY", "", "The istioctl --authority override"),

  istioctl x version --xds-address istio.example.com:15012 --cert-dir ~/.istio-certs

  # Retrieve version information via XDS from specific control plane in multi-control plane in-cluster configuration
  # (Select a specific control plane in an in-cluster canary Istio configuration.)
  istioctl x version --xds-label istio.io/rev=default
`

              },
              "expr": "sum(envoy_cluster_upstream_cx_active{cluster_name=\"xds-grpc\"})",
              "format": "time_series",
              "intervalFactor": 2,
              "legendFormat": "XDS Active Connections",
              "refId": "C",
              "step": 2
            }
          ],
          "title": "XDS Active Connections",
          "type": "timeseries"
        },
        {

          SERVER_URI="dns:///istiod.${ISTIO_NAMESPACE}.svc:15010"
          echo '
          {
            "xds_servers": [
              {
                "server_uri": "'${SERVER_URI}'",
                "channel_creds": [{"type": "insecure"}],
                "server_features" : ["xds_v3"]
              }
            ],
            "node": {
              "id": "'${NODE_ID}'",
              "metadata": {

    env:
      - name: "GRPC_XDS_EXPERIMENTAL_SECURITY_SUPPORT"
        value: "true"
      - name: "GRPC_XDS_BOOTSTRAP"
        value: "/etc/istio/proxy/grpc-bootstrap.json"
    volumeMounts:
      - mountPath: /var/lib/istio/data
        name: istio-data
      # UDS channel between istioagent and gRPC client for XDS/SDS
      - mountPath: /etc/istio/proxy
        name: istio-xds