#!/bin/bash
# Internet Watchdog - Reboots if internet is unreachable for 5 minutes
LOG_FILE="/var/log/internet-watchdog.log"
FAIL_COUNT=0
MAX_FAILS=5
CHECK_INTERVAL=60

log() {
    echo "$(date "+%Y-%m-%d %H:%M:%S") - $1" >> "$LOG_FILE"
}

check_internet() {
    for endpoint in 1.1.1.1 8.8.8.8 208.67.222.222; do
        if ping -c 1 -W 5 "$endpoint" > /dev/null 2>&1; then
            return 0
        fi
    done
    return 1
}

log "Watchdog started"

while true; do
    if check_internet; then
        if [ $FAIL_COUNT -gt 0 ]; then
            log "Internet restored after $FAIL_COUNT failures"
        fi
        FAIL_COUNT=0
    else
        FAIL_COUNT=$((FAIL_COUNT + 1))
        log "Internet check failed ($FAIL_COUNT/$MAX_FAILS)"

        if [ $FAIL_COUNT -ge $MAX_FAILS ]; then
            log "CRITICAL: $MAX_FAILS consecutive failures - REBOOTING"
            sync
            sleep 2
            reboot
        fi
    fi
    sleep $CHECK_INTERVAL
done