#!/bin/bash
# Generiert /etc/dnsmasq.hosts aus dem Ansible Inventory
# Usage: ./update-dns.sh [--apply]

INI="/app-config/ansible/pfannkuchen.ini"
OUT="/etc/dnsmasq.hosts"

TMP=$(mktemp)
echo "# Auto-generated from pfannkuchen.ini" > "$TMP"
echo "# $(date)" >> "$TMP"

grep "ansible_host=" "$INI" | while read line; do
  name=$(echo "$line" | awk '{print $1}')
  ip=$(echo "$line" | grep -oP 'ansible_host=\K[0-9.]+')
  [ -n "$ip" ] && echo "$ip  $name" >> "$TMP"
done

if [ "$1" = "--apply" ]; then
  sudo cp "$TMP" "$OUT"
  sudo systemctl restart dnsmasq
  COUNT=$(grep -cP '^\d' "$OUT")
  echo "✅ ${COUNT} Hosts → dnsmasq aktualisiert"
else
  echo "Preview:"
  cat "$TMP"
  echo ""
  echo "→ Mit --apply übernehmen"
fi
rm -f "$TMP"