// Copyright 2025 The Bucketeer 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 client

import (
	"context"

	"google.golang.org/grpc"

	"github.com/bucketeer-io/bucketeer/v2/pkg/rpc/metadata"
)

func XRequestIDUnaryClientInterceptor() grpc.UnaryClientInterceptor {
	return func(
		ctx context.Context,
		method string,
		req, reply interface{},
		cc *grpc.ClientConn,
		invoker grpc.UnaryInvoker,
		opts ...grpc.CallOption,
	) error {
		reqID := metadata.GetXRequestIDFromIncomingContext(ctx)
		if reqID == "" {
			reqID = metadata.GenerateXRequestID()
		}
		ctx = metadata.AppendXRequestIDToOutgoingContext(ctx, reqID)
		err := invoker(ctx, method, req, reply, cc, opts...)
		return err
	}
}
