import 'package:flutter/material.dart';

/// Homepoint-Marker auf der Karte im Fly-Modus (Doku: "den auf der Drohne
/// gelockten Homepoint abfragen ... benutze dieses Icon"), Pentagon-Haus-
/// Form aus design/homepoint-pentagon.svg - nativ als [CustomPainter] statt
/// als SVG-Asset nachgebaut (Format bewusst geaendert, dasselbe Muster wie
/// DroneMarkerIcon/PaperPlaneIcon: ein einzelnes Polygon lohnt keine
/// zusaetzliche SVG-Renderer-Abhaengigkeit).
class HomePointIcon extends StatelessWidget {
  const HomePointIcon({super.key, this.size = 32});

  final double size;

  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      size: Size.square(size),
      painter: const _HomePointPainter(),
    );
  }
}

class _HomePointPainter extends CustomPainter {
  const _HomePointPainter();

  // 1:1 aus design/homepoint-pentagon.svg uebernommene Koordinaten (viewBox
  // 0 0 72 72): Haus-Silhouette (Fuenfeck) mit spitzem Dach.
  static const _viewBoxSize = 72.0;
  static const _points = [
    Offset(20, 52),
    Offset(20, 34),
    Offset(36, 16),
    Offset(52, 34),
    Offset(52, 52),
  ];
  static const _fill = Color(0xFF161616);
  static const _strokeWidth = 3.0;

  @override
  void paint(Canvas canvas, Size size) {
    final scale = size.width / _viewBoxSize;
    Offset s(Offset p) => p * scale;

    final path = Path()..moveTo(s(_points.first).dx, s(_points.first).dy);
    for (final point in _points.skip(1)) {
      path.lineTo(s(point).dx, s(point).dy);
    }
    path.close();

    canvas.drawPath(path, Paint()..color = _fill);
    canvas.drawPath(
      path,
      Paint()
        ..color = Colors.white
        ..style = PaintingStyle.stroke
        ..strokeWidth = _strokeWidth * scale
        ..strokeJoin = StrokeJoin.round,
    );
  }

  @override
  bool shouldRepaint(covariant _HomePointPainter oldDelegate) => false;
}