// See the License for the specific language governing permissions and
// limitations under the License.

// Provides utility methods to generate X.509 certificates with different
// options. This implementation is Largely inspired from
// https://golang.org/src/crypto/tls/generate_cert.go.

package util

import (
	"crypto"
	"crypto/ecdsa"
	"crypto/rsa"
	"crypto/tls"
	"crypto/x509"
	"errors"
	"fmt"

	// queryable and should be preserved when modifying objects.
	Annotations map[string]string `json:"annotations,omitempty"`

	// ResourceVersion is an opaque identifier for tracking updates to the config registry.
	// The implementation may use a change index or a commit log for the revision.
	// The config client should not make any assumptions about revisions and rely only on
	// exact equality to implement optimistic concurrency of read-write operations.
	//

			return nil, fmt.Errorf("unable to listen on socket: %v", err)
		}
	}

	// NOTE: this is a temporary solution to provide bare-bones debug functionality
	// for pilot. a full design / implementation of self-monitoring and reporting
	// is coming. that design will include proper coverage of statusz/healthz type
	// functionality, in addition to how pilot reports its own metrics.
	if err := addMonitor(mux); err != nil {

	"path/filepath"
	"strings"

	"istio.io/istio/pkg/cluster"
	"istio.io/istio/pkg/config"
	"istio.io/istio/pkg/config/resource"
	"istio.io/istio/pkg/config/schema/gvk"
)

// Origin is a K8s specific implementation of resource.Origin
type Origin struct {
	Type            config.GroupVersionKind
	FullName        resource.FullName
	ResourceVersion resource.Version
	Ref             resource.Reference
	FieldsMap       map[string]int

// form, or don't diff.)
//
// This format is intended to make it difficult to use these numbers without
// writing some sort of special handling code in the hopes that that will
// cause implementors to also use a fixed point implementation.
//
// +protobuf=true
// +protobuf.embed=string
// +protobuf.options.marshal=false
// +protobuf.options.(gogoproto.goproto_stringer)=false
// +k8s:deepcopy-gen=true
// +k8s:openapi-gen=true
message Quantity {

	"istio.io/istio/pkg/config/resource"
)

var (
	// InternalError defines a diag.MessageType for message "InternalError".
	// Description: There was an internal error in the toolchain. This is almost always a bug in the implementation.
	InternalError = diag.NewMessageType(diag.Error, "IST0001", "Internal error: %v")

	// Deprecated defines a diag.MessageType for message "Deprecated".

	return c.c
}

var _ Singleton[any] = &collectionAdapter[any]{}

func NewSingleton[O any](hf TransformationEmpty[O], opts ...CollectionOption) Singleton[O] {
	// dummyCollection provides a trivial collection implementation that always provides a single dummyValue.
	// This is an internal construct exclusively for implementing the "Singleton" pattern.
	// This is so we can represent a singleton (a func() *O) as a collection (a func(I) *O).

	Analyzer
	RelevantSubset(kinds sets.Set[config.GroupVersionKind]) CombinedAnalyzer
	RemoveSkipped(schemas collection.Schemas) []string
	AnalyzerNames() []string
}

// InternalCombinedAnalyzer is an implementation of CombinedAnalyzer, a special analyzer that combines multiple analyzers into one
type InternalCombinedAnalyzer struct {
	name      string
	analyzers []Analyzer
}

// Combine multiple analyzers into a single one.

	ValidationErrorCode     = 126
)

// DNS ports
const (
	IstioAgentDNSListenerPort = "15053"
)

// type of iptables operation/command to run, as an enum
// the implementation will choose the correct underlying binary,
// so callers should just use these enums to indicate what they want to do.
type IptablesCmd int

const (
	IPTables        IptablesCmd = iota

  // +optional
  optional k8s.io.apimachinery.pkg.util.intstr.IntOrString maxUnavailable = 3;

  // UnhealthyPodEvictionPolicy defines the criteria for when unhealthy pods
  // should be considered for eviction. Current implementation considers healthy pods,
  // as pods that have status.conditions item with type="Ready",status="True".
  //
  // Valid policies are IfHealthyBudget and AlwaysAllow.