#!/bin/bash
# Polls the OpenClaw gateway health endpoint.
# Sends a Telegram notification whenever it recovers after being unreachable.

BOT_TOKEN="8598508497:AAHmTMbnR7un2ADtmsjJr8moQkDOU9ILBps"
CHAT_ID="1793951355"
GATEWAY_URL="http://127.0.0.1:18789"
POLL_INTERVAL=3   # seconds between checks
LOG_PREFIX="[$(date '+%Y-%m-%d %H:%M:%S')]"

send_notification() {
  curl -s -X POST "https://api.telegram.org/bot${BOT_TOKEN}/sendMessage" \
    -H "Content-Type: application/json" \
    -d "{
      \"chat_id\": \"${CHAT_ID}\",
      \"text\": \"✅ *Krilly is back online!*\n\nOpenClaw gateway restarted and is ready to go 🦀\",
      \"parse_mode\": \"Markdown\"
    }" > /dev/null
}

is_up() {
  STATUS=$(curl -s -o /dev/null -w "%{http_code}" --max-time 3 "${GATEWAY_URL}/health" 2>/dev/null)
  [ "$STATUS" = "200" ] || [ "$STATUS" = "401" ]
}

echo "$(date '+%Y-%m-%d %H:%M:%S') Gateway watcher started"

WAS_UP=true

while true; do
  if is_up; then
    if [ "$WAS_UP" = "false" ]; then
      echo "$(date '+%Y-%m-%d %H:%M:%S') Gateway recovered — sending notification"
      send_notification
    fi
    WAS_UP=true
  else
    if [ "$WAS_UP" = "true" ]; then
      echo "$(date '+%Y-%m-%d %H:%M:%S') Gateway went down"
    fi
    WAS_UP=false
  fi
  sleep "$POLL_INTERVAL"
done