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

syntax = "proto3";

package hashicorp.consul.mesh.v2beta1.pbproxystate;

// Note: it's nice to have this list of header mutations as opposed to configuration similar to Envoy because it
// translates more nicely from GAMMA HTTPRoute, and our existing service router config. Then xds code can handle turning
// it into envoy xds.
message HeaderMutation {
  oneof action {
    RequestHeaderAdd request_header_add = 1;
    RequestHeaderRemove request_header_remove = 2;
    ResponseHeaderAdd response_header_add = 3;
    ResponseHeaderRemove response_header_remove = 4;
  }
}

message RequestHeaderAdd {
  Header header = 1;
  AppendAction append_action = 2;
}

message RequestHeaderRemove {
  repeated string header_keys = 1;
}

message ResponseHeaderAdd {
  Header header = 1;
  AppendAction append_action = 2;
}

message ResponseHeaderRemove {
  repeated string header_keys = 1;
}

message Header {
  string key = 1;
  string value = 2;
}

// +kubebuilder:validation:Enum=APPEND_ACTION_APPEND_IF_EXISTS_OR_ADD;APPEND_ACTION_OVERWRITE_IF_EXISTS_OR_ADD
// +kubebuilder:validation:Type=string
enum AppendAction {
  // buf:lint:ignore ENUM_ZERO_VALUE_SUFFIX
  APPEND_ACTION_APPEND_IF_EXISTS_OR_ADD = 0;
  APPEND_ACTION_ADD_IF_ABSENT = 1;
  APPEND_ACTION_OVERWRITE_IF_EXISTS_OR_ADD = 2;
}