package message

import (
	"fmt"
)

// Type represents the type of message, which could be Request/Notify/Response/Push
type Type byte

// Message types
const (
	Request  Type = 0x00
	Notify        = 0x01
	Response      = 0x02
	Push          = 0x03
)

var types = map[Type]string{
	Request:  "Request",
	Notify:   "Notify",
	Response: "Response",
	Push:     "Push",
}

func (t Type) String() string {
	return types[t]
}

// Message represents an unmarshaler message or a message which to be marshaled
type Message struct {
	Type       Type   // message type (flag)
	ID         uint64 // unique id, zero while notify mode
	Route      string // route for locating service
	Data       []byte // payload
	compressed bool   // if message compressed
}

// New returns a new message instance
func New() *Message {
	return &Message{}
}

// String, implementation of fmt.Stringer interface
func (m *Message) String() string {
	return fmt.Sprintf("%s %s (%dbytes)", types[m.Type], m.Route, len(m.Data))
}