#!/usr/bin/env bash
# ============================================================================
#  01-cek-dns.sh  -  Cek apakah ikipie.com sudah mengarah ke server hosting
#                    yang BENAR (bukan lagi ke Google/Blogger).
#
#  Pakai:
#     bash 01-cek-dns.sh                            -> cek saja
#     bash 01-cek-dns.sh ikipie.com 103.253.x.x     -> cek + bandingkan IP
#
#  Cara menjalankan di server (cPanel > Terminal, atau SSH):
#     bash 01-cek-dns.sh ikipie.com <IP-SHARED-DARI-cPAN>
# ============================================================================
set -u

DOMAIN="${1:-ikipie.com}"
WWW="www.${DOMAIN}"
IPBENAR="${2:-}"

echo "==================================================================="
echo " CEK DNS : ${DOMAIN}"
echo " waktu   : $(date '+%d/%m/%Y %H:%M:%S')"
echo "==================================================================="

# ---------------------------------------------------------------- 1. NAMESERVER
echo
echo "[1] NAMESERVER (NS)"
ns_list="$(dig +short NS "${DOMAIN}" @1.1.1.1 2>/dev/null | sort)"
if [ -z "${ns_list}" ]; then
  ns_list="$(dig +short NS "${DOMAIN}" 2>/dev/null | sort)"
fi
echo "${ns_list}" | sed 's/^/      /'
if echo "${ns_list}" | grep -qi 'rumahweb'; then
  echo "      >> OK  : NS menunjuk ke Rumahweb."
else
  echo "      >> BAHAYA : NS bukan Rumahweb. Ini sumber masalah terpisah."
fi

# ---------------------------------------------------------------- 2. A RECORD
echo
echo "[2] A RECORD APEX (${DOMAIN})"
a_list="$(dig +short A "${DOMAIN}" @1.1.1.1 2>/dev/null | sort -u)"
[ -z "${a_list}" ] && a_list="$(dig +short A "${DOMAIN}" 2>/dev/null | sort -u)"
echo "${a_list}" | grep . | sed 's/^/      /'
if [ -z "${a_list}" ]; then
  echo "      >> MASALAH : tidak ada A record sama sekali."
elif echo "${a_list}" | grep -qE '^216\.239\.(3[2-9]|[34][0-9])\.'; then
  echo "      >> INILAH PENYEBAB 404 : A record masih menunjuk ke GOOGLE (Blogger)."
  echo "         Google tidak punya blog untuk domain ini -> tampil 'Error 404 (Not Found)!!1'."
elif echo "${a_list}" | grep -qE '^(74|142)\.250\.'; then
  echo "      >> A record menunjuk ke GOOGLE (ghs/Blogger). Sama: penyebab 404."
else
  echo "      >> A record bukan Google. Lanjut cek apakah IP-nya = server hosting."
fi

if [ -n "${IPBENAR}" ]; then
  echo "      -- dibandingkan dengan IP server yang Anda masukkan: ${IPBENAR}"
  if echo "${a_list}" | grep -qx "${IPBENAR}"; then
    echo "      >> COCOK : A record sudah menunjuk ke server hosting Anda."
  else
    echo "      >> BELUM COCOK : A record harus diubah ke ${IPBENAR}."
  fi
fi

# ---------------------------------------------------------------- 3. WWW
echo
echo "[3] WWW (${WWW})"
echo "      CNAME : $(dig +short CNAME "${WWW}" @1.1.1.1 2>/dev/null | tr '\n' ' ')"
echo "      A     : $(dig +short A "${WWW}" @1.1.1.1 2>/dev/null | tr '\n' ' ')"
if dig +short CNAME "${WWW}" @1.1.1.1 2>/dev/null | grep -qi 'ghs.google'; then
  echo "      >> INILAH PENYEBAB 404 untuk www : CNAME masih ke ghs.google.com."
  echo "         Ganti menjadi A ${IPBENAR:-<IP-SERVER>} (atau CNAME ke ${DOMAIN})."
fi

# ---------------------------------------------------------------- 4. SOA / umur edit zona
echo
echo "[4] SOA (serial = kapan zona DNS terakhir diubah)"
dig +short SOA "${DOMAIN}" @1.1.1.1 2>/dev/null | sed 's/^/      /'

# ---------------------------------------------------------------- 5. RESPONS HTTP
echo
echo "[5] RESPONS WEB"
for u in "http://${DOMAIN}/" "https://${DOMAIN}/"; do
  out="$(curl -sS -o /dev/null -w 'kode=%{http_code} ip=%{remote_ip}' --max-time 15 "${u}" 2>&1)"
  printf '      %-28s %s\n' "${u}" "${out}"
done
judul="$(curl -sS --max-time 15 "http://${DOMAIN}/" 2>/dev/null | grep -ioE '<title>[^<]*</title>' | head -1)"
[ -n "${judul}" ] && echo "      judul halaman : ${judul}"

# ---------------------------------------------------------------- SIMPULAN
echo
echo "==================================================================="
if echo "${a_list}" | grep -qE '^216\.239\.|^74\.250\.'; then
  echo " SIMPULAN : DNS SALAH. Domain masih diarahkan ke Google/Blogger."
  echo "            Perbaiki A record di panel DNS Rumahweb LEBIH DULU."
  echo "            Memasang ulang WordPress TIDAK akan mengubah apa pun."
else
  echo " SIMPULAN : A record tidak lagi menunjuk ke Google."
  echo "            Kalau situs masih 404, lanjutkan ke 02-cek-server.sh."
fi
echo "==================================================================="