#!/usr/bin/env bash
# kiosk-watchdog.sh — Monitors Archipelago backend health.
# Restarts the backend if it's unresponsive for 60 seconds.
# Shows server IP on text console if X is not running.
#
# Designed to run as a systemd service or standalone.

set -euo pipefail

HEALTH_URL="http://localhost/health"
CHECK_INTERVAL=5  # seconds between checks
MAX_FAILS=12      # 12 x 5s = 60s before restart

FAIL_COUNT=0

echo "Archipelago kiosk watchdog started"

while true; do
    # Check backend health
    if curl -sf "$HEALTH_URL" > /dev/null 2>&1; then
        if [ "$FAIL_COUNT" -gt 0 ]; then
            echo "Backend recovered after $FAIL_COUNT failed checks"
        fi
        FAIL_COUNT=0
    else
        FAIL_COUNT=$((FAIL_COUNT + 1))
        echo "Health check failed ($FAIL_COUNT/$MAX_FAILS)"

        if [ "$FAIL_COUNT" -ge "$MAX_FAILS" ]; then
            echo "Backend unresponsive for 60s, restarting archipelago service..."
            systemctl restart archipelago || true
            FAIL_COUNT=0
            sleep 10
            continue
        fi
    fi

    # If X is not running, display IP on text console as fallback
    if ! pgrep -x Xorg > /dev/null 2>&1 && ! pgrep -x chromium > /dev/null 2>&1; then
        IP=$(hostname -I 2>/dev/null | awk '{print $1}')
        if [ -n "$IP" ]; then
            printf '\n\n  Archipelago Server\n  IP: %s\n  Web UI: http://%s\n\n' "$IP" "$IP" > /dev/tty1 2>/dev/null || true
        fi
    fi

    sleep "$CHECK_INTERVAL"
done