package netmux

// The netmux module provides a "network multiplexer".
// The core idea is to have the client be able to connect to
// many different networks (potentially over different transports)
// and multiplex everything over one interface.

type Netmux struct {
	// the list of NetMux interfaces
	Interfaces []*Interface

	// The channels to send/recv from
	Incoming <-chan *Packet
	Outgoing chan<- *Packet

	// internally managed other side of channels
	incomingSrc chan<- *Packet
	outgoingSrc <-chan *Packet
}

// Warning: will probably change to adopt multiaddr format
type Packet struct {
	// the network addresses to send to
	// e.g. tcp4://127.0.0.1:12345
	NetAddrTo string

	// the network addresses to recv from
	// e.g. tcp4://127.0.0.1:12345
	// may be left blank to select one automatically.
	NetAddrFrom string

	// the data to send.
	Data []byte
}

func NewNetmux() *Netmux {
	n := &Netmux{}

	// setup channels
	och := make(chan *Packet)
	ich := make(chan *Packet)
	n.Incoming, n.incomingSrc = ich, ich
	n.Outgoing, n.outgoingSrc = och, och

	return n
}