import 'package:latlong2/latlong.dart';

List<LatLng> safeDecodePolyline(String encoded) {
  if (encoded.isEmpty) return [];
  try {
    List<LatLng> poly = [];
    int index = 0, len = encoded.length;
    int lat = 0, lng = 0;

    while (index < len) {
      int b, shift = 0, result = 0;
      do {
        if (index >= len) break;
        b = encoded.codeUnitAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
      } while (b >= 0x20);
      int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
      lat += dlat;

      shift = 0;
      result = 0;
      do {
        if (index >= len) break;
        b = encoded.codeUnitAt(index++) - 63;
        result |= (b & 0x1f) << shift;
        shift += 5;
      } while (b >= 0x20);
      int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
      lng += dlng;

      double finalLat = (lat / 1e5).clamp(-90.0, 90.0);
      double finalLng = (lng / 1e5).clamp(-180.0, 180.0);
      poly.add(LatLng(finalLat, finalLng));
    }
    return poly;
  } catch (e) {
    return [];
  }
}