package iptools

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

	"git.wntrmute.dev/kyle/kdhcp/leases"
)

func enumerateRange(name string, r *Range, startFromOne bool) []*leases.Info {
	start := r.Start
	cur := start
	lenfmt := fmt.Sprintf("%%s%%0%dd", len(fmt.Sprintf("%d", r.numHosts())))
	i := 0
	if startFromOne {
		i++
	}
	lrange := []*leases.Info{}

	for r.End.Compare(cur) >= 0 {
		hostName := fmt.Sprintf(lenfmt, name, i)
		lrange = append(lrange, &leases.Info{
			HostName: hostName,
			Addr:     cur,
		})
		i++
		cur = cur.Next()
	}

	return lrange
}

func NetIPtoAddr(ip net.IP) netip.Addr {
	addr, ok := netip.AddrFromSlice(ip)
	if !ok {
		return netip.IPv4Unspecified()
	}

	if !addr.Is4() {
		return netip.IPv4Unspecified()
	}

	return addr
}