// 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 authz

import (
	"bytes"
	"reflect"
	"testing"

	envoy_admin "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
	"google.golang.org/protobuf/types/known/anypb"

	case istioctlutil.CommandParseError:
		// do nothing
	default:
		t.Errorf("Expected a CommandParseError, but got %q.", fErr)
	}

	// all of the subcommands
	rootCmd = GetRootCmd([]string{"x", "authz", "check", "--unknown-flag"})
	fErr = rootCmd.Execute()

	switch fErr.(type) {
	case istioctlutil.CommandParseError:
		// do nothing
	default:
		t.Errorf("Expected a CommandParseError, but got %q.", fErr)
	}

// 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 authz

import (
	"fmt"
	"io"
	"regexp"
	"sort"
	"strings"
	"text/tabwriter"

	listener "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"

KEY:
policy_plugin  enable Access Management Plugin for policy enforcement

ARGS:
MINIO_POLICY_PLUGIN_URL*          (url)       plugin hook endpoint (HTTP(S)) e.g. "http://localhost:8181/v1/data/httpapi/authz/allow"
MINIO_POLICY_PLUGIN_AUTH_TOKEN    (string)    authorization header for plugin hook endpoint
MINIO_POLICY_PLUGIN_ENABLE_HTTP2  (bool)      Enable experimental HTTP2 support to connect to plugin service (default: 'off')

		Prefix: r.Form.Get("pattern"),
	})
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	// Get the cred and owner for checking authz below.
	cred, owner, s3Err := validateAdminSignature(ctx, r, "")
	if s3Err != ErrNone {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
		return
	}

/pilot/pkg/config/                                               @istio/wg-networking-maintainers
/pilot/pkg/networking/plugin/authn/                              @istio/wg-security-maintainers
/pilot/pkg/networking/plugin/authz/                              @istio/wg-security-maintainers
/pilot/pkg/serviceregistry/                                      @istio/wg-networking-maintainers-pilot

}

// IsAllowed - checks given policy args is allowed to continue the Rest API.
func (sys *IAMSys) IsAllowed(args policy.Args) bool {
	// If opa is configured, use OPA always.
	if authz := newGlobalAuthZPluginFn(); authz != nil {
		ok, err := authz.IsAllowed(args)
		if err != nil {
			authZLogIf(GlobalContext, err)
		}
		return ok
	}

	// Policies don't apply to the owner.
	if args.IsOwner {

  //
  // More details are available at https://k8s.io/docs/reference/access-authn-authz/certificate-signing-requests/#kubernetes-signers
  //
  // Custom signerNames can also be specified. The signer defines:
  //  1. Trust distribution: how trust (CA bundles) are distributed.

}

func authNLogIf(ctx context.Context, err error, errKind ...interface{}) {
	logger.LogIf(ctx, "authN", err, errKind...)
}

func authZLogIf(ctx context.Context, err error, errKind ...interface{}) {
	logger.LogIf(ctx, "authZ", err, errKind...)
}

func peersLogIf(ctx context.Context, err error, errKind ...interface{}) {
	if !errors.Is(err, grid.ErrDisconnected) {
		logger.LogIf(ctx, "peers", err, errKind...)
	}
}

  // 'authorizer' - A CEL Authorizer. May be used to perform authorization checks for the principal (user or service account) of the request.
  //   See https://pkg.go.dev/k8s.io/apiserver/pkg/cel/library#Authz
  // 'authorizer.requestResource' - A CEL ResourceCheck constructed from the 'authorizer' and configured with the
  //   request resource.
  // Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/
  //