package codec

import "io"

type Header struct {
	ServiceMethod string
	Seq           uint64
	Error         string
}

type Codec interface {
	io.Closer
	ReadHeader(*Header) error
	ReadBody(interface{}) error
	Write(*Header, interface{}) error
}

type NewCodecFunc func(closer io.ReadWriteCloser) Codec

type Type string

const (
	MagicNumber      = 0x12E7165
	GobType     Type = "application/gob"
	JsonType    Type = "application/json"
)

var NewCodecFuncMap map[Type]NewCodecFunc

func init() {
	NewCodecFuncMap = make(map[Type]NewCodecFunc)
	NewCodecFuncMap[GobType] = NewGobCodec
	NewCodecFuncMap[JsonType] = NewJsonCodec
}