```bash
#!/usr/bin/env bash
set -euo pipefail

# =========================
# Go2 Voice Starter Script
# =========================

BASE_DIR="/home/unitree/GoVoice"
PY_FILE="$BASE_DIR/Go2Voice.py"

WIFI_DEV="wlan0"
AUDIO_KEYWORDS_REGEX='anker|powerconf'   # auto-detect USB audio by name (case-insensitive)

ts() { date "+[%b %d %H:%M:%S]"; }

echo "$(ts) 📁 Base dir: $BASE_DIR"
cd "$BASE_DIR"

# -------------------------------------------------------------------
# 0) Improve chances pactl works under systemd by setting runtime dir
# -------------------------------------------------------------------
if [[ -z "${XDG_RUNTIME_DIR:-}" ]]; then
  UID_NOW="$(id -u)"
  if [[ -d "/run/user/$UID_NOW" ]]; then
    export XDG_RUNTIME_DIR="/run/user/$UID_NOW"
  fi
fi

# ============================================================
# 1) Ensure default route via Wi-Fi (non-interactive sudo safe)
# ============================================================
echo "$(ts) 🌐 Ensuring default route via $WIFI_DEV ..."

# Detect gateway from wlan0 route table (best)
GW="$(ip -4 route show dev "$WIFI_DEV" 2>/dev/null | awk '/default via/ {print $3; exit}' || true)"

# Fallback: infer gateway as x.x.x.1 from wlan0 IP
if [[ -z "${GW:-}" ]]; then
  WIFI_IP="$(ip -4 addr show dev "$WIFI_DEV" 2>/dev/null | awk '/inet /{print $2}' | cut -d/ -f1 | head -n1 || true)"
  if [[ -n "${WIFI_IP:-}" ]]; then
    GW="$(awk -F. '{print $1"."$2"."$3".1"}' <<<"$WIFI_IP")"
  fi
fi

if [[ -z "${GW:-}" ]]; then
  echo "$(ts) ⚠️ Could not detect Wi-Fi gateway (no IP on $WIFI_DEV?). Skipping route fix."
else
  echo "$(ts) ✅ Using gateway: $GW"

  # systemd service has no TTY → only do route changes if sudo is non-interactive (NOPASSWD)
  if sudo -n true 2>/dev/null; then
    # Keep eth0 default route as a higher metric fallback; ensure wlan0 exists with a better metric
    sudo ip -4 route del default dev "$WIFI_DEV" 2>/dev/null || true
    sudo ip -4 route add default via "$GW" dev "$WIFI_DEV" metric 600 2>/dev/null || true
  else
    echo "$(ts) ⚠️ sudo needs password (systemd has no TTY). Skipping route fix."
  fi

  echo "$(ts) 📡 Current default routes:"
  ip -4 route show default 2>/dev/null || true
fi

# ============================================================
# 2) Audio (PulseAudio / PipeWire-Pulse)
# ============================================================
echo "$(ts) 🔊 Checking PulseAudio (pactl)..."

if ! command -v pactl >/dev/null 2>&1; then
  echo "$(ts) ❌ pactl not found. Install:"
  echo "   sudo apt-get install -y pulseaudio-utils"
  exit 1
fi

# Wait a bit for pulse server to come up
echo "$(ts) ⏳ Waiting for audio server..."
READY=0
for i in {1..25}; do
  if timeout 0.3s pactl info >/dev/null 2>&1; then
    READY=1
    break
  fi
  sleep 0.25
done

# If not ready, try to start pulseaudio (best-effort; safe if PipeWire is used too)
if [[ "$READY" -ne 1 ]] && command -v pulseaudio >/dev/null 2>&1; then
  echo "$(ts) ⚠️ Audio server not ready, trying: pulseaudio --start"
  pulseaudio --start >/dev/null 2>&1 || true

  for i in {1..15}; do
    if timeout 0.3s pactl info >/dev/null 2>&1; then
      READY=1
      break
    fi
    sleep 0.25
  done
fi

if [[ "$READY" -ne 1 ]]; then
  echo "$(ts) ❌ PulseAudio/PipeWire not ready (pactl info failed)"
  exit 1
fi

echo "$(ts) ✅ Audio server ready"

# Auto-detect PowerConf/Anker sink+source (don’t hardcode names that may differ)
SINK="$(pactl list short sinks 2>/dev/null | awk -v IGNORECASE=1 -v re="$AUDIO_KEYWORDS_REGEX" '$0 ~ re {print $2; exit}')"
SOURCE="$(pactl list short sources 2>/dev/null | awk -v IGNORECASE=1 -v re="$AUDIO_KEYWORDS_REGEX" '$0 ~ re {print $2; exit}')"

echo "$(ts) 🎧 Setting default speaker → ${SINK:-<not found>}"
if [[ -n "${SINK:-}" ]]; then
  pactl set-default-sink "$SINK" >/dev/null 2>&1 || echo "$(ts) ⚠️ Could not set default sink"
else
  echo "$(ts) ⚠️ PowerConf/Anker sink not found; keeping current default"
fi

echo "$(ts) 🎤 Setting default microphone → ${SOURCE:-<not found>}"
if [[ -n "${SOURCE:-}" ]]; then
  pactl set-default-source "$SOURCE" >/dev/null 2>&1 || echo "$(ts) ⚠️ Could not set default source"
else
  echo "$(ts) ⚠️ PowerConf/Anker source not found; keeping current default"
fi

echo
echo "$(ts) 📋 Current PulseAudio defaults:"
pactl info | grep -E "Default Sink|Default Source" || true
echo

# ============================================================
# 3) Run python
# ============================================================
if [[ ! -f "$PY_FILE" ]]; then
  echo "$(ts) ❌ Python file not found: $PY_FILE"
  exit 1
fi

echo "$(ts) 🚀 Starting Gemini Sanad"
echo "$(ts) 🐍 Running: $PY_FILE"
exec python3 "$PY_FILE"
```