// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

syntax = "proto3";

package hashicorp.consul.mesh.v1alpha1;

import "pbresource/resource.proto";

// NOTE: roughly equivalent to structs.ResourceReference
message ParentReference {
  // For east/west configuration, this should point to a pbcatalog.Service.
  // For north/south it should point to a gateway (TBD)
  hashicorp.consul.resource.Reference ref = 1;

  // Port is the network port this Route targets. It can be interpreted
  // differently based on the type of parent resource.
  //
  // When the parent resource is a Gateway, this targets all listeners
  // listening on the specified port that also support this kind of Route(and
  // select this Route). It’s not recommended to set Port unless the networking
  // behaviors specified in a Route must apply to a specific port as opposed to
  // a listener(s) whose port(s) may be changed. When both Port and SectionName
  // are specified, the name and port of the selected listener must match both
  // specified values.
  //
  // Implementations MAY choose to support other parent resources.
  // Implementations supporting other types of parent resources MUST clearly
  // document how/if Port is interpreted.
  //
  // For the purpose of status, an attachment is considered successful as long
  // as the parent resource accepts it partially. For example, Gateway
  // listeners can restrict which Routes can attach to them by Route kind,
  // namespace, or hostname. If 1 of 2 Gateway listeners accept attachment from
  // the referencing Route, the Route MUST be considered successfully attached.
  // If no Gateway listeners accept attachment from this Route, the Route MUST
  // be considered detached from the Gateway.
  //
  // For east/west this is the name of the consul port.
  // For north/south this is the stringified integer port expected by GAMMA.
  //
  // https://gateway-api.sigs.k8s.io/geps/gep-957/
  string port = 2;
}

message BackendReference {
  // For east/west configuration, this should point to either a
  // pbcatalog.Service or ServiceSubset.
  //
  // For Partition/PeerName fields likely we could map them to ServiceImports
  // (MCS+GAMMA) when translating
  hashicorp.consul.resource.Reference ref = 1;

  // For east/west this is the name of the consul port.
  string port = 2;

  // NOT IN GAMMA; multi-cluster + GWapi is still unknown
  //
  // Likely we could map this to ServiceImports (MCS+GAMMA) when translating
  // to/from k8s.
  //
  // https://gateway-api.sigs.k8s.io/geps/gep-1748/
  string datacenter = 3;
}