package encoder

import (
	"encoding/json"
	"encoding/xml"
	"github.com/vmihailenco/msgpack/v4"
)

var (
	XML     xmlEncoder
	JSON    jsonEncoder
	MsgPack msgPackEncoder
)

func EncoderFrom(name string) Encoder {
	var enc Encoder

	switch name {
	case "json":
		enc = JSON
	case "xml":
		enc = XML
	default: // Default is also msgpack
		enc = MsgPack
	}

	return enc
}

type Encoder interface {
	Unmarshal(b []byte, dest any) error
	Marshal(value any) ([]byte, error)
}

type jsonEncoder struct {
}

func (j jsonEncoder) Marshal(value any) ([]byte, error) {
	return json.Marshal(value)
}

func (j jsonEncoder) Unmarshal(b []byte, dest any) error {
	return json.Unmarshal(b, dest)
}

type msgPackEncoder struct {
}

func (m msgPackEncoder) Marshal(value any) ([]byte, error) {
	return msgpack.Marshal(value)
}

func (m msgPackEncoder) Unmarshal(b []byte, dest any) error {
	return msgpack.Unmarshal(b, dest)
}

type xmlEncoder struct {
}

func (x xmlEncoder) Marshal(value any) ([]byte, error) {
	return xml.Marshal(value)
}

func (x xmlEncoder) Unmarshal(b []byte, dest any) error {
	return xml.Unmarshal(b, dest)
}