package packet

import (
	"fmt"
	"git.noahlan.cn/northlan/nnet/log"
	"git.noahlan.cn/northlan/nnet/nface"
)

type DefaultProcessor struct{}

func NewDefaultProcessor() *DefaultProcessor {
	return &DefaultProcessor{}
}

func (d *DefaultProcessor) ProcessPacket(conn nface.IConnection, packet interface{}) error {
	p := packet.(*Packet)
	switch p.Type {
	case Handshake:
		// TODO validate handshake
		if _, err := conn.Conn().Write([]byte{}); err != nil {
			return err
		}
		conn.SetStatus(nface.StatusPrepare)
		log.Debugf("Connection handshake Id=%d, Remote=%s", conn.ID(), conn.Conn().RemoteAddr())
	case HandshakeAck:
		conn.SetStatus(nface.StatusWorking)
		log.Debugf("Receive handshake ACK Id=%d, Remote=%s", conn.ID(), conn.Conn().RemoteAddr())

	case Data:
		if conn.Status() < nface.StatusWorking {
			return fmt.Errorf("receive data on socket which not yet ACK, session will be closed immediately, remote=%s",
				conn.Conn().RemoteAddr())
		}
		// TODO message data 处理
	case Heartbeat:
		// expected
	}

	return nil
}