package plain

import (
	"git.noahlan.cn/noahlan/nnet/core"
	"git.noahlan.cn/noahlan/nnet/entity"
	"git.noahlan.cn/noahlan/nnet/packet"
	"git.noahlan.cn/noahlan/ntools-go/core/nlog"
)

type Router struct {
	plainHandler core.Handler
	notFound     core.Handler
}

func NewRouter() core.Router {
	return &Router{}
}

func (r *Router) Handle(entity entity.NetworkEntity, pkg packet.IPacket) {
	p, ok := pkg.(*Packet)
	if !ok {
		nlog.Error(packet.ErrWrongPacketType)
		return
	}
	if r.plainHandler == nil {
		if r.notFound == nil {
			nlog.Error("message handler not found")
			return
		}
		r.notFound.Handle(entity, p)
		return
	}
	r.plainHandler.Handle(entity, p)
}

func (r *Router) Register(_ interface{}, handler core.Handler) error {
	r.plainHandler = handler
	return nil
}

func (r *Router) SetNotFoundHandler(handler core.Handler) {
	r.notFound = handler
}