// Copyright 2022-2025 The Connect 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.

package otelconnect

import (
	"context"
	"time"

	"connectrpc.com/connect"
	"go.opentelemetry.io/otel/metric"
	"go.opentelemetry.io/otel/propagation"
	"go.opentelemetry.io/otel/trace"
)

const (
	version             = "0.9.0"
	semanticVersion     = "semver:" + version
	instrumentationName = "connectrpc.com/otelconnect"

	grpcString    = "grpc"
	grpcwebString = "grpcweb"
	connectString = "connect"

	grpcProtocol    = "grpc"
	connectProtocol = "connect_rpc"
)

type config struct {
	filter                  func(context.Context, connect.Spec) bool
	filterAttribute         AttributeFilter
	meter                   metric.Meter
	tracer                  trace.Tracer
	propagator              propagation.TextMapPropagator
	now                     func() time.Time
	trustRemote             bool
	requestHeaderKeys       []string
	responseHeaderKeys      []string
	omitTraceEvents         bool
	propagateResponseHeader bool
	rpcSystem               RPCSystem
}