package zhuye;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import java.util.List;

/**
 * Utility renderer for handheld boundary previews.
 */
public final class adddikuaiyulan {
    private static final Color HANDHELD_BOUNDARY_FILL = new Color(51, 153, 255, 60);
    private static final Color HANDHELD_BOUNDARY_BORDER = new Color(0, 100, 0, 220);
    private static final Color HANDHELD_BOUNDARY_POINT = new Color(0, 100, 0);

    private adddikuaiyulan() {
    }

    public static void drawPreview(Graphics2D g2d,
                                   List<Point2D.Double> previewPoints,
                                   double scale,
                                   boolean previewActive) {
        if (g2d == null || !previewActive || previewPoints == null || previewPoints.isEmpty()) {
            return;
        }

        Path2D.Double path = new Path2D.Double();
        boolean started = false;
        for (Point2D.Double point : previewPoints) {
            if (point == null || !Double.isFinite(point.x) || !Double.isFinite(point.y)) {
                continue;
            }
            if (!started) {
                path.moveTo(point.x, point.y);
                started = true;
            } else {
                path.lineTo(point.x, point.y);
            }
        }

        if (!started) {
            return;
        }

        Stroke originalStroke = g2d.getStroke();
        Color originalColor = g2d.getColor();

        if (previewPoints.size() >= 3) {
            path.closePath();
            g2d.setColor(HANDHELD_BOUNDARY_FILL);
            g2d.fill(path);
        }

        float outlineWidth =0.1f;
        g2d.setStroke(new BasicStroke(outlineWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
        g2d.setColor(HANDHELD_BOUNDARY_BORDER);
        g2d.draw(path);

        double markerSize = 0.2d;
        double markerRadius = markerSize / 2.0d;

        for (Point2D.Double point : previewPoints) {
            if (point == null || !Double.isFinite(point.x) || !Double.isFinite(point.y)) {
                continue;
            }
            Shape marker = new Ellipse2D.Double(point.x - markerRadius, point.y - markerRadius, markerSize, markerSize);
            g2d.setColor(HANDHELD_BOUNDARY_POINT);
            g2d.fill(marker);
        }

        g2d.setStroke(originalStroke);
        g2d.setColor(originalColor);
    }
}