package peer

import (
	"net/netip"
	"vppn/peer/control"

	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
)

// WGDevice is the subset of wginterface.Device used by App.
type WGDevice interface {
	Name() string
	Peers() ([]wgtypes.Peer, error)
	AddPeer(pubKey wgtypes.Key) error
	AddDirect(pubKey wgtypes.Key, endpoint netip.AddrPort, vpnIP netip.Addr) error
	SetRelay(pubKey wgtypes.Key, endpoint netip.AddrPort, network netip.Prefix) error
	AddProbe(pubKey wgtypes.Key, endpoint netip.AddrPort) error
	Promote(pubKey wgtypes.Key, vpnIP netip.Addr) error
	RemovePeer(pubKey wgtypes.Key) error
}

// ControlConn sends pings to peers over the VPN control port.
// Reading is handled separately via run, which feeds the App's pingCh.
// buf is a caller-provided scratch buffer (at least control.Size bytes) used to
// marshal the ping; the caller reuses one across sends.
type ControlConn interface {
	SendPing(dst netip.AddrPort, ping control.Ping, buf []byte) error
}