package pubsub

import (
	
	

	
	
	
)

const (
	RandomSubID = protocol.ID("/randomsub/1.0.0")
)

var (
	RandomSubD = 6
)

// NewRandomSub returns a new PubSub object using RandomSubRouter as the router.
func ( context.Context,  host.Host,  int,  ...Option) (*PubSub, error) {
	 := &RandomSubRouter{
		size:  ,
		peers: make(map[peer.ID]protocol.ID),
	}
	return NewPubSub(, , , ...)
}

// RandomSubRouter is a router that implements a random propagation strategy.
// For each message, it selects the square root of the network size peers, with a min of RandomSubD,
// and forwards the message to them.
type RandomSubRouter struct {
	p      *PubSub
	peers  map[peer.ID]protocol.ID
	size   int
	tracer *pubsubTracer
}

func ( *RandomSubRouter) () []protocol.ID {
	return []protocol.ID{RandomSubID, FloodSubID}
}

func ( *RandomSubRouter) ( *PubSub) {
	.p = 
	.tracer = .tracer
}

func ( *RandomSubRouter) ( peer.ID,  protocol.ID) {
	.tracer.AddPeer(, )
	.peers[] = 
}

func ( *RandomSubRouter) ( peer.ID) {
	.tracer.RemovePeer()
	delete(.peers, )
}

func ( *RandomSubRouter) ( string,  int) bool {
	// check all peers in the topic
	,  := .p.topics[]
	if ! {
		return false
	}

	 := 0
	 := 0

	// count floodsub and randomsub peers
	for  := range  {
		switch .peers[] {
		case FloodSubID:
			++
		case RandomSubID:
			++
		}
	}

	if  == 0 {
		 = RandomSubD
	}

	if + >=  {
		return true
	}

	if  >= RandomSubD {
		return true
	}

	return false
}

func ( *RandomSubRouter) (peer.ID) AcceptStatus {
	return AcceptAll
}

func ( *RandomSubRouter) ([]*Message) {}

func ( *RandomSubRouter) ( *RPC) {}

func ( *RandomSubRouter) ( *Message) {
	 := .ReceivedFrom

	 := make(map[peer.ID]struct{})
	 := make(map[peer.ID]struct{})
	 := peer.ID(.GetFrom())

	 := .GetTopic()
	,  := .p.topics[]
	if ! {
		return
	}

	for  := range  {
		if  ==  ||  ==  {
			continue
		}

		if .peers[] == FloodSubID {
			[] = struct{}{}
		} else {
			[] = struct{}{}
		}
	}

	if len() > RandomSubD {
		 := RandomSubD
		 := int(math.Ceil(math.Sqrt(float64(.size))))
		if  >  {
			 = 
		}
		if  > len() {
			 = len()
		}
		 := peerMapToList()
		shufflePeers()
		 = [:]
		for ,  := range  {
			[] = struct{}{}
		}
	} else {
		for  := range  {
			[] = struct{}{}
		}
	}

	 := rpcWithMessages(.Message)
	for  := range  {
		,  := .p.peers[]
		if ! {
			continue
		}

		 := .Push(, false)
		if  != nil {
			log.Infof("dropping message to peer %s: queue full", )
			.tracer.DropRPC(, )
			continue
		}
		.tracer.SendRPC(, )
	}
}

func ( *RandomSubRouter) ( string) {
	.tracer.Join()
}

func ( *RandomSubRouter) ( string) {
	.tracer.Join()
}