package discoveryutils

import (
	"net"
	"regexp"
	"strconv"
)

// SanitizeLabelName replaces anything that doesn't match
// client_label.LabelNameRE with an underscore.
//
// This has been copied from Prometheus sources at util/strutil/strconv.go
func SanitizeLabelName(name string) string {
	return invalidLabelCharRE.ReplaceAllString(name, "_")
}

var (
	invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
)

// JoinHostPort returns host:port.
//
// Host may be dns name, ipv4 or ipv6 address.
func JoinHostPort(host string, port int) string {
	portStr := strconv.Itoa(port)
	return net.JoinHostPort(host, portStr)
}