package node

import (
	"log"
	"math/rand"
	"time"
)

func relayManager() {
	time.Sleep(2 * time.Second)
	updateRelayRoute()

	for range time.Tick(8 * time.Second) {
		relay := getRelayRoute()
		if relay == nil || !relay.Up || !relay.Relay {
			updateRelayRoute()
		}
	}
}

func updateRelayRoute() {
	possible := make([]*peerRoute, 0, 8)
	for i := range routingTable {
		route := routingTable[i].Load()
		if !route.Up || !route.Relay {
			continue
		}
		possible = append(possible, route)
	}

	if len(possible) == 0 {
		log.Printf("No relay available.")
		relayIP.Store(nil)
		return
	}

	ip := possible[rand.Intn(len(possible))].IP
	log.Printf("New relay IP: %d", ip)
	relayIP.Store(&ip)
}