func printConns(n inet.Network) string {
	s := fmt.Sprintf("Connections in %s:\n", n)
	for _, c := range n.Conns() {
		s = s + fmt.Sprintf("- %s\n", c)
	}
	return s
}

// PeersToPBPeers converts given []peer.Peer into a set of []*Message_Peer,
// which can be written to a message and sent out. the key thing this function
// does (in addition to PeersToPBPeers) is set the ConnectionType with
// information from the given inet.Network.
func PeerInfosToPBPeers(n inet.Network, peers []peer.PeerInfo) []*Message_Peer {
	pbps := RawPeerInfosToPBPeers(peers)
	for i, pbp := range pbps {
		c := ConnectionType(n.Connectedness(peers[i].ID))
		pbp.Connection = &c
	}
	return pbps
}

func (p *printer) NetworkConns(ni inet.Network) {

	fmt.Fprintf(p.w, "%s connected to:\n", ni.LocalPeer())
	for _, c := range ni.Conns() {
		fmt.Fprintf(p.w, "\t%s (addr: %s)\n", c.RemotePeer(), c.RemoteMultiaddr())
	}
	fmt.Fprintf(p.w, "\n")
}

func expectConnectedness(t *testing.T, a, b inet.Network, expected inet.Connectedness) {
	es := "%s is connected to %s, but Connectedness incorrect. %s %s"
	if a.Connectedness(b.LocalPeer()) != expected {
		t.Errorf(es, a, b, printConns(a), printConns(b))
	}

	// test symmetric case
	if b.Connectedness(a.LocalPeer()) != expected {
		t.Errorf(es, b, a, printConns(b), printConns(a))
	}
}

// New constructs and sets up a new *BasicHost with given Network
func New(net inet.Network, opts ...interface{}) *BasicHost {
	h := &BasicHost{
		network: net,
		mux:     msmux.NewMultistreamMuxer(),
		bwc:     metrics.NewBandwidthCounter(),
	}

	h.proc = goprocess.WithTeardown(func() error {
		if h.natmgr != nil {
			h.natmgr.Close()
		}

		return h.Network().Close()
	})

	// setup host services
	h.ids = identify.NewIDService(h)

	muxh := h.Mux().Handle
	handle := func(s inet.Stream) {
		muxh(s)
	}
	h.relay = relay.NewRelayService(h, handle)

	for _, o := range opts {
		switch o := o.(type) {
		case Option:
			switch o {
			case NATPortMap:
				h.natmgr = newNatManager(h)
			}
		case metrics.Reporter:
			h.bwc = o
		}
	}

	net.SetConnHandler(h.newConnHandler)
	net.SetStreamHandler(h.newStreamHandler)

	return h
}

func (mn *mocknet) LinksBetweenNets(n1, n2 inet.Network) []Link {
	return mn.LinksBetweenPeers(n1.LocalPeer(), n2.LocalPeer())
}

func (mn *mocknet) DisconnectNets(n1, n2 inet.Network) error {
	return n1.ClosePeer(n2.LocalPeer())
}

func (mn *mocknet) ConnectNets(a, b inet.Network) (inet.Conn, error) {
	return a.DialPeer(mn.ctx, b.LocalPeer())
}

func (mn *mocknet) UnlinkNets(n1, n2 inet.Network) error {
	return mn.UnlinkPeers(n1.LocalPeer(), n2.LocalPeer())
}

func (nn *metricsNotifiee) Disconnected(n inet.Network, v inet.Conn) {
	peersTotalGauge(n.LocalPeer()).Set(float64(len(n.Conns())))
}

func DivulgeAddresses(a, b inet.Network) {
	id := a.LocalPeer()
	addrs := a.Peerstore().Addrs(id)
	b.Peerstore().AddAddrs(id, addrs, peer.PermanentAddrTTL)
}