import 'dart:ui';
import 'package:flutter/material.dart';

class DashedRect extends StatelessWidget {
  final Color color;
  final double strokeWidth;
  final double gap;
  final Widget? child;
  final BorderRadius? borderRadius;

  const DashedRect({
    super.key,
    this.color = Colors.black,
    this.strokeWidth = 1.0,
    this.gap = 5.0,
    this.child,
    this.borderRadius,
  });

  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      painter: _DashedRectPainter(
        color: color,
        strokeWidth: strokeWidth,
        gap: gap,
        borderRadius: borderRadius ?? BorderRadius.zero,
      ),
      child: child,
    );
  }
}

class _DashedRectPainter extends CustomPainter {
  final Color color;
  final double strokeWidth;
  final double gap;
  final BorderRadius borderRadius;

  _DashedRectPainter({
    required this.color,
    required this.strokeWidth,
    required this.gap,
    required this.borderRadius,
  });

  @override
  void paint(Canvas canvas, Size size) {
    final Paint paint = Paint()
      ..color = color
      ..strokeWidth = strokeWidth
      ..style = PaintingStyle.stroke;

    final Path path = Path()
      ..addRRect(
        RRect.fromRectAndCorners(
          Rect.fromLTWH(0, 0, size.width, size.height),
          topLeft: borderRadius.topLeft,
          topRight: borderRadius.topRight,
          bottomLeft: borderRadius.bottomLeft,
          bottomRight: borderRadius.bottomRight,
        ),
      );

    Path dashedPath = Path();
    for (PathMetric pathMetric in path.computeMetrics()) {
      double distance = 0.0;
      while (distance < pathMetric.length) {
        dashedPath.addPath(
          pathMetric.extractPath(distance, distance + gap),
          Offset.zero,
        );
        distance += gap * 2;
      }
    }

    canvas.drawPath(dashedPath, paint);
  }

  @override
  bool shouldRepaint(covariant _DashedRectPainter oldDelegate) {
    return oldDelegate.color != color ||
        oldDelegate.strokeWidth != strokeWidth ||
        oldDelegate.gap != gap ||
        oldDelegate.borderRadius != borderRadius;
  }
}