#!/bin/sh

rm -f /tmp/.X99-lock
Xvfb :99 -screen 0 1024x768x24 &
xvfb_pid=$!

export DISPLAY=:99

npm start &
app_pid=$!

term_handler() {
  kill "$app_pid" 2>/dev/null || true
  kill "$xvfb_pid" 2>/dev/null || true
}

trap term_handler INT TERM

while kill -0 "$app_pid" 2>/dev/null; do
  if ! kill -0 "$xvfb_pid" 2>/dev/null; then
    echo "Xvfb exited; stopping app." >&2
    kill "$app_pid" 2>/dev/null || true
    wait "$app_pid" 2>/dev/null || true
    exit 1
  fi
  sleep 1
done

wait "$app_pid"
app_status=$?
kill "$xvfb_pid" 2>/dev/null || true
wait "$xvfb_pid" 2>/dev/null || true
exit "$app_status"