package json

import (
	"encoding/json"

	"github.com/oxtoacart/bpool"
	jsonpb "google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

var jsonpbMarshaler = &jsonpb.MarshalOptions{}

// create buffer pool with 16 instances each preallocated with 256 bytes
var bufferPool = bpool.NewSizedBufferPool(16, 256)

type Marshaler struct{}

func (j Marshaler) Marshal(v interface{}) ([]byte, error) {
	if pb, ok := v.(proto.Message); ok {
		buf, err := jsonpbMarshaler.Marshal(pb)
		if err != nil {
			return nil, err
		}
		return buf, nil
	}
	return json.Marshal(v)
}

func (j Marshaler) Unmarshal(d []byte, v interface{}) error {
	if pb, ok := v.(proto.Message); ok {
		return jsonpb.Unmarshal(d, pb)
	}
	return json.Unmarshal(d, v)
}

func (j Marshaler) String() string {
	return "json"
}