// Copyright Istio 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 protoconv

import (
	"fmt"

	udpa "github.com/cncf/xds/go/udpa/type/v1"
	"google.golang.org/protobuf/encoding/prototext"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/anypb"
	"istio.io/pkg/log"
)

// MessageToAnyWithError converts from proto message to proto Any
func MessageToAnyWithError(msg proto.Message) (*anypb.Any, error) {
	b, err := proto.MarshalOptions{Deterministic: true}.Marshal(msg)
	if err != nil {
		return nil, err
	}
	return &anypb.Any{
		TypeUrl: "type.googleapis.com/" + string(msg.ProtoReflect().Descriptor().FullName()),
		Value:   b,
	}, nil
}

// MessageToAny converts from proto message to proto Any
func MessageToAny(msg proto.Message) *anypb.Any {
	out, err := MessageToAnyWithError(msg)
	if err != nil {
		log.Error(fmt.Sprintf("error marshaling Any %s: %v", prototext.Format(msg), err))
		return nil
	}
	return out
}

// TypedStruct creates a typedStrcut from the given typeURL
func TypedStruct(typeURL string) *anypb.Any {
	return MessageToAny(&udpa.TypedStruct{
		TypeUrl: typeURL,
		Value:   nil,
	})
}
