package backend

import (
	"fmt"
	"net"
	"strconv"
)

// parsePeer splits a "host:port" string. Uses net.SplitHostPort so IPv6
// bracket notation (e.g. "[::1]:9990") is handled correctly.
func parsePeer(peer string) (host string, port int, err error) {
	h, portStr, err := net.SplitHostPort(peer)
	if err != nil {
		return "", 0, fmt.Errorf("invalid peer %q: %w", peer, err)
	}
	if h == "" {
		return "", 0, fmt.Errorf("invalid peer %q: empty host", peer)
	}
	port, err = strconv.Atoi(portStr)
	if err != nil || port <= 0 || port > 65535 {
		return "", 0, fmt.Errorf("invalid port in peer %q", peer)
	}
	return h, port, nil
}