#!/usr/bin/env bash
sudo bash <<'EOF'
cat > /usr/local/sbin/tz-wizard <<'SCRIPT'
#!/bin/bash
set -e
[ "$EUID" -ne 0 ] && { echo "Run with sudo"; exit 1; }

# Main Middle East zones (label + IANA timezone)
ZONES=(
  "Beirut (Lebanon)|Asia/Beirut"
  "Damascus (Syria)|Asia/Damascus"
  "Baghdad (Iraq)|Asia/Baghdad"
  "Amman (Jordan)|Asia/Amman"
  "Jerusalem (Israel)|Asia/Jerusalem"
  "Gaza (Palestine)|Asia/Gaza"
  "Hebron (Palestine)|Asia/Hebron"
  "Riyadh (Saudi Arabia)|Asia/Riyadh"
  "Kuwait|Asia/Kuwait"
  "Qatar (Doha)|Asia/Qatar"
  "Bahrain (Manama)|Asia/Bahrain"
  "Dubai / Abu Dhabi (UAE)|Asia/Dubai"
  "Muscat (Oman)|Asia/Muscat"
  "Sanaa (Yemen)|Asia/Aden"
  "Tehran (Iran)|Asia/Tehran"
  "Nicosia (Cyprus)|Asia/Nicosia"
  "Istanbul (Turkey)|Europe/Istanbul"
  "Cairo (Egypt)|Africa/Cairo"
)

CUR=$(timedatectl show -p Timezone --value 2>/dev/null || cat /etc/timezone 2>/dev/null)
echo "Current timezone: ${CUR:-unknown}"
echo
echo "Choose a timezone:"
for i in "${!ZONES[@]}"; do
  LABEL="${ZONES[$i]%%|*}"
  printf "  %2d) %s\n" "$((i+1))" "$LABEL"
done
echo "   0) Enter a custom IANA zone manually"
echo
read -rp "Number: " N

if [ "$N" = "0" ]; then
  read -rp "Custom IANA timezone (e.g. Asia/Beirut): " TZ
else
  SEL="${ZONES[$((N-1))]}"
  [ -z "$SEL" ] && { echo "Invalid choice"; exit 1; }
  TZ="${SEL##*|}"
fi

# validate
if ! timedatectl list-timezones 2>/dev/null | grep -qx "$TZ"; then
  [ -f "/usr/share/zoneinfo/$TZ" ] || { echo "Invalid timezone: $TZ"; exit 1; }
fi

timedatectl set-timezone "$TZ"
timedatectl set-ntp yes

echo
echo "Set to $TZ with NTP enabled."
echo
timedatectl
SCRIPT
chmod +x /usr/local/sbin/tz-wizard
echo "Installed. Run:  sudo tz-wizard"
EOF

sudo tz-wizard