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

syntax = "proto3";

package hashicorp.consul.mesh.v1alpha1;

import "pbcatalog/v1alpha1/selector.proto";
import "pbmesh/v1alpha1/upstreams_configuration.proto";
import "pbresource/annotations.proto";
import "pbresource/resource.proto";

message Upstreams {
  option (hashicorp.consul.resource.spec) = {scope: SCOPE_NAMESPACE};

  // Selection of workloads these upstreams should apply to.
  // These can be prefixes or specific workload names.
  hashicorp.consul.catalog.v1alpha1.WorkloadSelector workloads = 1;

  // upstreams is the list of explicit upstreams to define for the selected workloads.
  repeated Upstream upstreams = 2;

  // pq_upstreams is the list of prepared query upstreams. This field is not supported directly in v2
  // and should only be used for migration reasons.
  repeated PreparedQueryUpstream pq_upstreams = 3;
}

message Upstream {
  // destination_ref is the reference to an upstream service. This has to be pbcatalog.Service type.
  hashicorp.consul.resource.Reference destination_ref = 1;

  // destination_port is the port name of the upstream service. This should be the name
  // of the service's target port.
  string destination_port = 2;

  // datacenter is the datacenter for where this upstream service lives.
  string datacenter = 3;

  // listen_addr is the address where Envoy will listen for requests to this upstream.
  // It can provided either as an ip:port or as a Unix domain socket.
  oneof listen_addr {
    IPPortAddress ip_port = 4;
    UnixSocketAddress unix = 5;
  }
}

message IPPortAddress {
  // ip is an IPv4 or an IPv6 address.
  string ip = 1;

  // port is the port number.
  uint32 port = 2;
}

message UnixSocketAddress {
  // path is the file system path at which to bind a Unix domain socket listener.
  string path = 1;

  // mode is the Unix file mode for the socket file. It should be provided
  // in the numeric notation, for example, "0600".
  string mode = 2;
}

message PreparedQueryUpstream {
  // name is the name of the prepared query to use as an upstream.
  string name = 1;

  // datacenter is the datacenter for where this upstream service lives.
  string datacenter = 2;

  // listen_addr is the address where Envoy will listen for requests to this upstream.
  // It can provided either as an ip:port or as a Unix domain socket.
  oneof listen_addr {
    IPPortAddress tcp = 4;
    UnixSocketAddress unix = 5;
  }

  UpstreamConfig upstream_config = 6;
}