// etc). The Proxy is initialized when a sidecar connects to Pilot, and populated from
// 'node' info in the protocol as well as data extracted from registries.
//
// In current Istio implementation nodes use a 4-parts '~' delimited ID.
// Type~IPAddress~ID~Domain
type Proxy struct {
	sync.RWMutex

	// Type specifies the node type. First part of the ID.
	Type NodeType

func (v *PeerCertVerifier) AddMappings(certMap map[string][]*x509.Certificate) {
	for trustDomain, certs := range certMap {
		v.AddMapping(trustDomain, certs)
	}
}

// VerifyPeerCert is an implementation of tls.Config.VerifyPeerCertificate.
// It verifies the peer certificate using the root certificates associated with its trust domain.
func (v *PeerCertVerifier) VerifyPeerCert(rawCerts [][]byte, _ [][]*x509.Certificate) error {

	TCP *tlsv3.DownstreamTlsContext
	// HTTP describes the tls context to use for HTTP filter chains
	HTTP *tlsv3.DownstreamTlsContext
}

var authnLog = log.RegisterScope("authn", "authn debugging")

// Implementation of authn.PolicyApplier with v1beta1 API.
type policyApplier struct {
	// processedJwtRules is the consolidate JWT rules from all jwtPolicies.
	processedJwtRules []*v1beta1.JWTRule

  // but should apply for any default implementation. If set, it is assumed that a load balancer
  // implementation is watching for Services with a matching class. Any default load balancer
  // implementation (e.g. cloud providers) should ignore Services that set this field.
  // This field can only be set when creating or updating a Service to type 'LoadBalancer'.

	debounceMax time.Duration

	// enableEDSDebounce indicates whether EDS pushes should be debounced.
	enableEDSDebounce bool
}

// DiscoveryServer is Pilot's gRPC implementation for Envoy's xds APIs
type DiscoveryServer struct {
	// Env is the model environment.
	Env *model.Environment

	// Generators allow customizing the generated config, based on the client metadata.

// block forever on
func (con *ProxyConnection) sendDeltaRequest(req *discovery.DeltaDiscoveryRequest) {
	con.deltaRequestsChan.Put(req)
}

// DeltaAggregatedResources is an implementation of Delta XDS API used for proxying between Istiod and Envoy.
// Every time envoy makes a fresh connection to the agent, we reestablish a new connection to the upstream xds

	return
}

// Copied from https://github.com/envoyproxy/envoy/blob/5451efd9b8f8a444431197050e45ba974ed4e9d8/source/common/common/utility.cc#L601-L615
// to ensure we 100% match Envoy's implementation
func isPrime(x uint64) bool {
	if x != 0 && x < 4 {
		return true // eliminates special-casing 2.
	} else if (x & 1) == 0 {
		return false // eliminates even numbers >2.
	}

var ValidateEnvoyFilter = validation.RegisterValidateFunc("ValidateEnvoyFilter",
	func(cfg config.Config) (Warning, error) {
		errs := Validation{}
		errs = validation.AppendWarningf(errs, "EnvoyFilter exposes internal implementation details that may change at any time. "+
			"Prefer other APIs if possible, and exercise extreme caution, especially around upgrades.")
		return validateEnvoyFilter(cfg, errs)
	})

		t.Fatal("RBAC rule not enforced")
	}
	if status.Code(err) != codes.PermissionDenied {
		t.Fatal("Unexpected error", err)
	}
	t.Log(err)
}

// From xds_resolver_test
// testClientConn is a fake implementation of resolver.ClientConn. All is does
// is to store the state received from the resolver locally and signal that
// event through a channel.
type testClientConn struct {
	resolver.ClientConn

// CertificateAuthority. It may default or otherwise mutate a certificate
// template.
type SigningPolicy interface {
	// not-exporting apply forces signing policy implementations to be internal
	// to this package.
	apply(template *x509.Certificate) error
}

// PermissiveSigningPolicy is the signing policy historically used by the local
// signer.
//