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

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(cd -- "$SCRIPT_DIR/.." && pwd)"

VENV_DIR="$PROJECT_DIR/.venv"
MAIN="$PROJECT_DIR/main.py"
LOG_FILE="$PROJECT_DIR/debug.log"

if [[ ! -x "$VENV_DIR/bin/python3" ]]; then
    echo "ERROR: Virtual environment not found."
    echo "Run:"
    echo "  ./scripts/build.sh"
    exit 1
fi

if [[ ! -f "$MAIN" ]]; then
    echo "ERROR: main.py not found:"
    echo "       $MAIN"
    exit 1
fi

cd "$PROJECT_DIR"

if systemctl is-active --quiet car-ui.service; then
    echo "ERROR: car-ui.service is already running."
    echo
    echo "Stop it before running source code directly:"
    echo "  sudo systemctl stop car-ui.service"
    exit 1
fi

if systemctl is-active --quiet graphical.target; then
    # Desktop mode
    export DISPLAY="${DISPLAY:-:0}"

    echo "==> Starting Car UI (Desktop)"
    echo "    DISPLAY=$DISPLAY"
else
    # Console / Car mode
    export QT_QPA_PLATFORM=eglfs

    echo "==> Starting Car UI (EGLFS)"
    echo "    QT_QPA_PLATFORM=$QT_QPA_PLATFORM"
fi

echo "    Python: $VENV_DIR/bin/python3"
echo

"$VENV_DIR/bin/python3" "$MAIN" 2>&1 | tee "$LOG_FILE"