#!/bin/sh
# Publish A records for the stack's service names over mDNS (.local).
# Requires host networking (mDNS is link-local multicast). One avahi-publish
# per name; if any dies the container exits so Docker restarts it.
set -eu

: "${BASE_DOMAIN:?BASE_DOMAIN unset}"
: "${HOST_LAN_IP:?HOST_LAN_IP unset}"

case "$BASE_DOMAIN" in
  *.local) ;;
  *) echo "WARN: mDNS resolves only .local — BASE_DOMAIN=$BASE_DOMAIN will NOT be discoverable via avahi. Set BASE_DOMAIN=*.local to use mDNS." >&2 ;;
esac

mkdir -p /run/dbus
rm -f /run/dbus/pid /run/dbus/system_bus_socket 2>/dev/null || true
dbus-daemon --system
for _ in 1 2 3 4 5; do [ -S /run/dbus/system_bus_socket ] && break; sleep 1; done

avahi-daemon --daemonize --no-chroot
sleep 2

pids=""
for n in "$BASE_DOMAIN" "auth.$BASE_DOMAIN" "packwiz.$BASE_DOMAIN" "mc.$BASE_DOMAIN"; do
  echo "mDNS publish: $n -> $HOST_LAN_IP"
  avahi-publish -a "$n" "$HOST_LAN_IP" &
  pids="$pids $!"
done

# Block on the publishers; exit (→ restart) if one drops.
# shellcheck disable=SC2086
wait -n $pids 2>/dev/null || wait