package conn

import (
	"fmt"
	"net"
)

// 消息类型
type MsgType byte

const (
	MsgPing MsgType = iota
	MsgRequest
	MsgResponse
	MsgAuth
	MsgProxyConnect
	MsgProxyResult
)

func (t MsgType) String() string {
	switch t {
	case MsgPing:
		return "Ping"
	case MsgRequest:
		return "Request"
	case MsgResponse:
		return "Response"
	case MsgAuth:
		return "auth"
	case MsgProxyConnect:
		return "ProxyConnect"
	case MsgProxyResult:
		return "ProxyResult"
	default:
		return fmt.Sprintf("Unknown (%d)", t)
	}
}

// 网络数据包结构
// type MsgData struct {
// 	Type  MsgType
// 	Id    uint16
// 	Cmd   string
// 	State uint8
// 	Data  []byte
// }

// 连接接口，代表一个原始的连接
type Connect interface {
	ReadAuthInfo() (proto string, version uint8, channel string, auth []byte, err error)
	ReadMessage(deadline int) (msgType MsgType, id uint16, cmd string, state uint8, data []byte, err error)
	ReadRawPackage(deadline int) (buf []byte, recycle bool, err error)
	WriteRawPackage(raw []byte, recycle bool) (err error)
	WriteAuthInfo(channel string, auth []byte) (err error)
	WriteRequest(id uint16, cmd string, data []byte) error
	WriteResponse(id uint16, state uint8, data []byte) error
	WritePing(id uint16) error
	RemoteIP() net.IP
	LocalIP() net.IP
	Close() error
}

// 服务请求连接
type ServerConnectFunc func(conn Connect)