package ports

// ProtocolVersion is the current vev IPC wire protocol version.
const ProtocolVersion uint16 = 19

// MsgType identifies the kind of payload carried by a Frame.
type MsgType uint8

// Frame message types. Client-originated messages are numbered from 1
// through 15, server-originated messages from 16, leaving room for growth in
// each band.
const (
	MsgHello        MsgType = 1
	MsgInput        MsgType = 2
	MsgResize       MsgType = 3
	MsgDetach       MsgType = 4
	MsgPing         MsgType = 5
	MsgList         MsgType = 6
	MsgKill         MsgType = 7
	MsgTheme        MsgType = 8
	MsgAck          MsgType = 9
	MsgImagePush    MsgType = 10
	MsgClientNotice MsgType = 11
	MsgCommand      MsgType = 12

	MsgWelcome       MsgType = 16
	MsgError         MsgType = 17
	MsgOutput        MsgType = 18
	MsgDetached      MsgType = 19
	MsgPong          MsgType = 20
	MsgSessions      MsgType = 21
	MsgCommandResult MsgType = 22
)

// Frame is the unit of exchange over a Transport: a typed, length-delimited
// message. It lives in ports (rather than an ipc adapter) so usecases and
// adapters can share it without either depending on a concrete transport
// implementation.
type Frame struct {
	Type    MsgType
	Payload []byte
}