#!/bin/sh
set -eu

# If enabled, start a mock Teensy that exposes a PTY at /dev/ttyACM0 and streams LTC-like lines.
if [ "${MOCK_TEENSY:-0}" = "1" ]; then
  echo "[entrypoint] Starting mock Teensy (PTY at /dev/ttyACM0)..." >&2
  # Bridge the LTC generator to a PTY that looks like a Teensy serial port.
  # Left side runs the generator, right side is a PTY linked to /dev/ttyACM0
  socat -d -d -lf /dev/stderr EXEC:'/usr/local/bin/ltc-gen.sh',pty,ctty,echo=0,raw PTY,link=/dev/ttyACM0,raw,echo=0 &
  SOCAT_PID=$!

  # Wait briefly for the PTY to appear
  i=0
  while [ $i -lt 50 ]; do
    if [ -e /dev/ttyACM0 ]; then
      break
    fi
    i=$((i+1))
    sleep 0.1
  done
  if [ ! -e /dev/ttyACM0 ]; then
    echo "[entrypoint] WARNING: Failed to create /dev/ttyACM0 (mock Teensy)" >&2
  else
    export HACI_SERIAL_PORT=/dev/ttyACM0
    echo "[entrypoint] Using mock serial at $HACI_SERIAL_PORT" >&2
  fi
fi

# Run the requested command (default: get-haci)
exec "$@"