//go:build !windows

package deploy

import (
	"bufio"
	"net"
	"os/exec"
	"strings"
)

func neighborHosts() []string {
	out, err := exec.Command("ip", "-4", "neighbor", "show").Output()
	if err != nil {
		return nil
	}
	local := getLocalIPs()
	subnets := make(map[string]bool)
	for _, ip := range local {
		subnets[getSubnet(ip)] = true
	}

	var hosts []string
	seen := make(map[string]bool)
	scanner := bufio.NewScanner(strings.NewReader(string(out)))
	for scanner.Scan() {
		fields := strings.Fields(scanner.Text())
		if len(fields) < 1 {
			continue
		}
		ip := net.ParseIP(fields[0])
		if ip == nil || ip.To4() == nil {
			continue
		}
		if len(fields) >= 5 && strings.EqualFold(fields[len(fields)-1], "FAILED") {
			continue
		}
		ipStr := ip.To4().String()
		if !subnets[getSubnet(ipStr)] || seen[ipStr] {
			continue
		}
		seen[ipStr] = true
		hosts = append(hosts, ipStr)
	}
	return hosts
}

func discoverADDomainPlatform() string {
	return ""
}