// Copyright 2025 Envoy Project Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package envoy.extensions.access_loggers.open_telemetry.v3;

import "envoy/config/core/v3/extension.proto";
import "envoy/extensions/access_loggers/grpc/v3/als.proto";

import "opentelemetry/proto/common/v1/common.proto";

import "udpa/annotations/status.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.extensions.access_loggers.open_telemetry.v3";
option java_outer_classname = "LogsServiceProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/access_loggers/open_telemetry/v3;open_telemetryv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: OpenTelemetry (gRPC) Access Log]

// Configuration for the built-in ``envoy.access_loggers.open_telemetry``
// :ref:`AccessLog <envoy_v3_api_msg_config.accesslog.v3.AccessLog>`. This configuration will
// populate `opentelemetry.proto.collector.v1.logs.ExportLogsServiceRequest.resource_logs <https://github.com/open-telemetry/opentelemetry-proto/blob/main/opentelemetry/proto/collector/logs/v1/logs_service.proto>`_.
// In addition, the request start time is set in the dedicated field.
// [#extension: envoy.access_loggers.open_telemetry]
// [#next-free-field: 8]
message OpenTelemetryAccessLogConfig {
  // [#comment:TODO(itamarkam): add 'filter_state_objects_to_log' to logs.]
  grpc.v3.CommonGrpcAccessLogConfig common_config = 1 [(validate.rules).message = {required: true}];

  // If specified, Envoy will not generate built-in resource labels
  // like ``log_name``, ``zone_name``, ``cluster_name``, ``node_name``.
  bool disable_builtin_labels = 5;

  // OpenTelemetry `Resource <https://github.com/open-telemetry/opentelemetry-proto/blob/main/opentelemetry/proto/logs/v1/logs.proto#L51>`_
  // attributes are filled with Envoy node info.
  // Example: ``resource_attributes { values { key: "region" value { string_value: "cn-north-7" } } }``.
  opentelemetry.proto.common.v1.KeyValueList resource_attributes = 4;

  // OpenTelemetry `LogResource <https://github.com/open-telemetry/opentelemetry-proto/blob/main/opentelemetry/proto/logs/v1/logs.proto>`_
  // fields, following `Envoy access logging formatting <https://www.envoyproxy.io/docs/envoy/latest/configuration/observability/access_log/usage>`_.
  //
  // See 'body' in the LogResource proto for more details.
  // Example: ``body { string_value: "%PROTOCOL%" }``.
  opentelemetry.proto.common.v1.AnyValue body = 2;

  // See 'attributes' in the LogResource proto for more details.
  // Example: ``attributes { values { key: "user_agent" value { string_value: "%REQ(USER-AGENT)%" } } }``.
  opentelemetry.proto.common.v1.KeyValueList attributes = 3;

  // Optional. Additional prefix to use on OpenTelemetry access logger stats. If empty, the stats will be rooted at
  // ``access_logs.open_telemetry_access_log.``. If non-empty, stats will be rooted at
  // ``access_logs.open_telemetry_access_log.<stat_prefix>.``.
  string stat_prefix = 6;

  // Specifies a collection of Formatter plugins that can be called from the access log configuration.
  // See the formatters extensions documentation for details.
  // [#extension-category: envoy.formatter]
  repeated config.core.v3.TypedExtensionConfig formatters = 7;
}
