package org.jzy3d.plot3d.primitives.contour;

import java.util.ArrayList;
import java.util.List;

import org.jzy3d.contour.MapperContourPictureGenerator;
import org.jzy3d.plot3d.primitives.AbstractComposite;
import org.jzy3d.plot3d.primitives.AbstractDrawable;
import org.jzy3d.plot3d.primitives.LineStrip;
import org.jzy3d.plot3d.primitives.Point;


/** 
 * A {@link ContourLevel} is an {@link AbstractComposite} gathering a collection of 
 * {@link LineStrip}s for a given contour level.
 * @author Martin
 */
public class ContourLevel extends AbstractComposite {
	public ContourLevel() {
		super();
		lines = new ArrayList();
	}
	
	public ContourLevel(float value) {
		super();
		this.value = value;
		lines = new ArrayList();
	}

	public ContourLevel(int id, float value, List lines) {
		super();
		this.id = id;
		this.value = value;
		this.lines = lines;

		updateComponents();
	}

	public int getId() {
		return id;
	}

	public float getValue() {
		return value;
	}

	public List getLines() {
		return lines;
	}

	public void appendLine(LineStrip strip) {
		LineStrip friend = policy.mostMergeableIfAny(strip, lines);
		if(friend != null){
			int fid = lines.indexOf(friend);
			friend = LineStrip.merge(strip, friend);
			lines.set(fid, friend);
		}
		else{ // no one to connect
			lines.add(strip);
		}
		updateComponents();
	}

	public void fixZ(float value) {
		for (AbstractDrawable d : components) {
			LineStrip line = (LineStrip) d;
			for (Point point : line.getPoints()) {
				point.xyz.z = value;
			}
		}
	}

	protected void updateComponents() {
		components.clear();
		for (LineStrip strip : lines)
			components.add(strip);
	}

	protected ILineStripMergePolicy policy = new DefaultLineStripMergePolicy(MapperContourPictureGenerator.MERGE_STRIP_DIST);

	protected int id;
	protected float value;
	protected List lines = new ArrayList();
}