package server

import (
	"fmt"
	"net/netip"
	"time"

	log "git.wntrmute.dev/kyle/goutils/log"
	"git.wntrmute.dev/kyle/kdhcp/iptools"
	"git.wntrmute.dev/kyle/kdhcp/leases"
)

// pools.go adds pool functionality to the server.

func (srv *Server) loadPoolsFromConfig() error {
	for host, ip := range srv.Config.Statics {
		addr, ok := netip.AddrFromSlice(ip.To4())
		if !ok {
			return fmt.Errorf("server: while instantiating pools, could not load IP %s", ip)
		}
		log.Debugf("server: added static host entry %s -> %s", host, addr)
		srv.Static[host] = &leases.Info{
			HostName: host,
			Addr:     addr,
		}
	}

	for name, ipRange := range srv.Config.Pools {
		pool, err := iptools.NewPool(name, ipRange)
		if err != nil {
			return fmt.Errorf("server: couldn't load pool %s: %w", name, err)
		}
		log.Debugf("server: added pool %s: %s -> %s", name, ipRange.Start, ipRange.End)

		srv.Pools[name] = pool
	}

	return nil
}

func (srv *Server) updatePoolLoop() {
	for {
		time.Sleep(time.Minute)
		for _, p := range srv.Pools {
			if p.Update(srv.clock.Now()) {
				log.Debugln("pools updated")
			}
		}
	}
}