package geography;

import java.awt.Shape;
import java.awt.geom.Path2D;

/**
 * A class representing a piecewise linear curve.
 */
public class PiecewiseLinearCurve extends AbstractGeographicShape
{
  protected Path2D.Double shape;

  /**
   * @param id
   *          The id of the curve
   */
  public PiecewiseLinearCurve(final String id)
  {
    super(id);
    shape = new Path2D.Double();
  }

  /**
   * @param id
   *          The id of the curve
   * @param path
   *          The path of the curve
   */
  public PiecewiseLinearCurve(final String id, final Path2D.Double path)
  {
    super(id);
    this.shape = path;
  }

  @Override
  public Shape getShape()
  {
    return shape;
  }

  /**
   * @param point
   *          The point to add to the curve
   */
  public void add(final double[] point)
  {
    if (shape.getCurrentPoint() == null)
    {
      shape.moveTo(point[0], point[1]);
    }
    else
    {
      shape.lineTo(point[0], point[1]);
    }
  }

  /**
   * @param addition
   *          The shape to add to the curve
   * @param connect
   *          Whether to connect the current curve to the addition with a line segment (if true, the
   *          addition will be connected to the current curve with a line segment; if false, the
   *          addition will be added as a separate shape)
   */
  public void append(final Shape addition, final boolean connect)
  {
    if (connect && shape.getCurrentPoint() != null)
    {
      shape.lineTo(addition.getBounds2D().getX(), addition.getBounds2D().getY());
    }
    shape.append(addition, false);
  }
}