package node

import (
	"net"
	"net/netip"
	"net/url"
	"sync/atomic"
)

const (
	bufferSize            = 1536
	if_mtu                = 1200
	if_queue_len          = 2048
	controlCipherOverhead = 16
	dataCipherOverhead    = 16
	signOverhead          = 64
)

var multicastAddr = net.UDPAddrFromAddrPort(netip.AddrPortFrom(
	netip.AddrFrom4([4]byte{224, 0, 0, 157}),
	4560))

var (
	hubURL *url.URL
	apiKey string

	// Configuration for this peer.
	netName     string
	localIP     byte
	localPub    bool
	localAddr   netip.AddrPort
	privKey     []byte
	privSignKey []byte

	// TODO: Doesn't need to be global.
	// Duplicate checkers for incoming packets.
	dupChecks [256]*dupCheck = func() (out [256]*dupCheck) {
		for i := range out {
			out[i] = newDupCheck(0)
		}
		return
	}()

	// TODO: Doesn't need to be global .
	// Messages for the supervisor.
	messages = make(chan any, 1024)

	// TODO: Doesn't need to be global .
	// Global routing table.
	routingTable [256]*atomic.Pointer[peerRoute] = func() (out [256]*atomic.Pointer[peerRoute]) {
		for i := range out {
			out[i] = &atomic.Pointer[peerRoute]{}
			out[i].Store(&peerRoute{})
		}
		return
	}()

	// Managed by the relayManager.
	relayIP = &atomic.Pointer[byte]{}

	// TODO: Only used by supervisor: can make local there.
	publicAddrs = newPubAddrStore()
)