#!/bin/bash
# Checks every 5 minutes if a livekit restart is pending.
# Only restarts when there are no active WebSocket connections on port 7881
# (established connections = active call participants).
# Run by: livekit-graceful-restart.timer (systemd)

if [ ! -f /run/livekit-restart-pending ]; then
    exit 0
fi

# Count established WebSocket signaling connections on livekit port 7881
ACTIVE=$(ss -tn state established '( dport = :7881 or sport = :7881 )' | grep -c ESTAB || true)

if [ "$ACTIVE" -gt 0 ]; then
    echo "$(date): Livekit restart pending but $ACTIVE active connection(s) — waiting."
    exit 0
fi

echo "$(date): No active calls — applying livekit-server restart."
systemctl restart livekit-server
rm -f /run/livekit-restart-pending
echo "$(date): livekit-server restarted successfully."