package main

import (
	"encoding/json"
	"git.wanbits.io/joe/franklin/comp"
	pb "git.wanbits.io/joe/franklin/protos"
	"git.wanbits.io/joe/kettle/log"
	"git.wanbits.io/joe/kettle/mac"
	"git.wanbits.io/joe/kettle/utl"
	"git.wanbits.io/joe/nnet"
	"go.uber.org/zap"
	"time"
)

const (
	LOGIC_SESSION_ID = 5
	LOGIN_TIMEOUT    = 2 * time.Second

	CMD_HEARTBEAT       = "bl_heartbeat"
	CMD_LOGIN_VERIFY    = "bl_login_verify"
	CMD_UPDATE_USERINFO = "bl_update_userinfo"
)

type WaitParam struct {
	ses   nnet.ISession
	timer *time.Timer
}

// TODO: optimize with Pool
func NewWaitParam(ses nnet.ISession, timeout time.Duration) *WaitParam {
	return &WaitParam{
		ses:   ses,
		timer: time.NewTimer(timeout),
	}
}

//
//type WaitorParam struct {
//	ses nnet.ISession
//	ch  chan struct{}
//}
//
//type PacketWaitor struct {
//	mp *utl.SMap
//}
//
//func NewPacketWaitor() *PacketWaitor {
//	return &PacketWaitor{
//		mp: utl.NewSMap(),
//	}
//}
//
//func Wait(key interface{}, ses nnet.ISession) {
//
//}

func (self *RabbitCProtocol) Send(packet *ReqPacket, cses nnet.ISession) error {
	ses, err := g_rabbit.GetSession(LOGIC_SESSION_ID)
	if err != nil {
		log.Warn("RabbitSend", zap.Error(err))
		return err
	}

	chWait := NewWaitParam(cses, LOGIN_TIMEOUT)
	err = g_rabbitProto.Insert(packet.Seq, chWait)
	if err != nil {
		return err
	}

	go func() {
		select {
		case <-chWait.timer.C:
			g_rabbitProto.Del(packet.Seq)
			on_recv_timeout(cses, packet)
		}
	}()

	return ses.AWrite(packet, time.Second*2)
}

type RespPacket struct {
	*utl.JsResp
}

func NewRespPacket(cmd string, seq int64, ec int, res interface{}) *RespPacket {
	return &RespPacket{
		&utl.JsResp{
			Cmd:    cmd,
			Seq:    seq,
			Ec:     ec,
			Result: res,
		},
	}
}

func (self *RespPacket) ShouldClose() (bool, int32) {
	return false, 0
}

type ReqPacket struct {
	*utl.JsReq
}

func NewReqPacket(cmd string, seq int64, params interface{}) *ReqPacket {
	return &ReqPacket{
		&utl.JsReq{
			Cmd:    cmd,
			Seq:    seq,
			Params: params,
		},
	}
}

func (self *ReqPacket) ShouldClose() (bool, int32) {
	return false, 0
}

type RabbitCProtocol struct {
	*utl.SMap
}

func NewRabbitCProtocol() *RabbitCProtocol {
	return &RabbitCProtocol{
		utl.NewSMap(),
	}
}

func (self *RabbitCProtocol) ReadPacket(conn nnet.IConn) (nnet.IPacket, error) {
	buf := comp.GBufPool.Get()
	defer comp.GBufPool.Put(buf)

	n, err := conn.Read(buf)
	if err != nil {
		return nil, err
	}

	p := &RespPacket{}
	err = json.Unmarshal(buf[:n], p)
	if err != nil {
		return nil, err
	}

	return p, nil
}

func (self *RabbitCProtocol) Serialize(packet nnet.IPacket) ([]byte, error) {
	p, ok := packet.(*ReqPacket)
	if !ok {
		return nil, utl.ErrInterfaceTransform
	}

	data, err := json.Marshal(p)
	if err != nil {
		return nil, err
	}

	return data, nil
}

func (self *RabbitCProtocol) OnClosed(ses nnet.ISession, reason int32) {
	log.Debug("closed connection to login", zap.Int32("reason", reason))
	g_rabbit.StartReconn(ses.ServerAddr(), ses.Id())
}

func (self *RabbitCProtocol) OnConnected(ses nnet.ISession) (bool, int32) {
	log.Debug("connected to login server", zap.String("addr", ses.ServerAddr()))
	ses.UpdateId(LOGIC_SESSION_ID)
	return true, 0
}

func (self *RabbitCProtocol) OnMessage(ses nnet.ISession, pkt nnet.IPacket) bool {
	resp, ok := pkt.(*RespPacket)
	if !ok {
		log.Error("not a RespPacket")
		return false
	}

	// dispatch
	cb, ok := rabbit_route_table[resp.Cmd]
	if !ok {
		log.Error("unsupported cmd", zap.String("cmd", resp.Cmd))
		return false
	}

	cb(ses, resp)

	return true
}

// server-side dont handle heartbeat.
func (self *RabbitCProtocol) OnHeartbeat(ses nnet.ISession) bool {
	mac.GetMachInfoMutablePart(&comp.Gmi)
	var cpuPercent int32 = 0
	if len(comp.Gmi.CpuPercent) > 0 {
		cpuPercent = int32(comp.Gmi.CpuPercent[0])
	}
	seq := time.Now().UnixNano()
	p := NewReqPacket("bl_heartbeat", seq, &pb.StatusParams{
		Id:      g_conf.Id,
		Ts:      time.Now().Unix(),
		Active:  int32(g_server.GetSessionNum()),
		Support: 3000,
		Mem:     int32(comp.Gmi.MemPercent),
		Cpu:     cpuPercent,
	})

	_ = self.Send(p, nil)

	return true
}