import org.jfree.fx.FXGraphics2D;

import java.awt.*;
import java.awt.geom.Line2D;

public class MovingLine {

    private MovingPoint beginPoint;
    private MovingPoint endPoint;
    private Color color;

    private int counter = 0;

    private int MAX_LINES = 30;

    private Line2D.Double[] trailingLines;

    public MovingLine(MovingPoint beginPoint, MovingPoint endPoint, Color color) {
        this.beginPoint = beginPoint;
        this.endPoint = endPoint;
        this.color = color;

        trailingLines = new Line2D.Double[MAX_LINES];
    }

    public void draw(FXGraphics2D graphics) {
        graphics.setColor(color);
        graphics.draw(getAsLine());

        for (int i = trailingLines.length-1; i >= 0; i--) {
            if (trailingLines[i] != null)
                graphics.draw(trailingLines[i]);
        }
    }

    public void update() {
        this.beginPoint.update();
        this.endPoint.update();

        counter++;
        if (counter == MAX_LINES) {
            counter = 0;
        }

        for (int i = trailingLines.length-1; i > 0; i--) {
            trailingLines[i] = trailingLines[i-1];
        }

        trailingLines[0] = getAsLine();

    }

    public void setMovingBounds(double canvasWidth, double canvasHeight) {
        this.beginPoint.setMovingBounds(canvasWidth, canvasHeight);
        this.endPoint.setMovingBounds(canvasWidth, canvasHeight);
    }

    public Line2D.Double getAsLine() {
        return new Line2D.Double(beginPoint.getxPos(), beginPoint.getyPos(), endPoint.getxPos(), endPoint.getyPos());
    }
}