/* Open Log Viewer
    *
    * Copyright 2011
    *
    * This file is part of the OpenLogViewer project.
    *
    * OpenLogViewer software is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * OpenLogViewer software is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with any OpenLogViewer software.  If not, see http://www.gnu.org/licenses/
   *
   * I ask that if you make any changes to this file you fork the code on github.com!
   *
   */
  package org.diyefi.openlogviewer.coloring;
  
  import java.awt.Color;
  import java.util.List;
  import java.util.LinkedList;
  import java.util.ListIterator;
  
  /**
   * InitialLineColoring is used to provide the coloring for the GenericDataElements.
   * The colors provided should be the most contrasting colors possible.
   * @author Ben Fenner
   */
  public enum InitialLineColoring {
  
  	INSTANCE;
  
  	private final List<MarkedColor> colorList;
  
  	private InitialLineColoring() {
  		colorList = new LinkedList<MarkedColor>();
  
  		colorList.add(new MarkedColor(Color.getHSBColor(1.0F, 1.0F, 1.0F), true, 0.0));
  		colorList.add(new MarkedColor(Color.getHSBColor(0.25F, 1.0F, 1.0F), true, 0.0));
  		colorList.add(new MarkedColor(Color.getHSBColor(0.5F, 1.0F, 1.0F), true, 0.0));
  		colorList.add(new MarkedColor(Color.getHSBColor(0.75F, 1.0F, 1.0F), true, 0.0));
  
  		for (long i = 8; i < 128; i *= 2) {
  			this.addColors(i);
  		}
  	}
  
  	private void addColors(final long hueOffsetDinominator) {
  		final long numColors = hueOffsetDinominator / 2;
  		final double hueOffset = 1.0 / hueOffsetDinominator;
  
  		for (long i = 0; i < (numColors - 1); i++) {
  			double hue = 0.0;
  			hue += hueOffset; // Always skip pure red and go to the next hue.
  
  			for (int j = 0; j < 4; j++) {
  				final MarkedColor newColor = new MarkedColor(Color.getHSBColor((float) hue, 1.0F, 1.0F), true, hue);
  				if (!colorList.contains(newColor)) {
  					colorList.add(newColor);
  				}
  				hue += 0.25;
  			}
  		}
  	}
  
  	public Color getBestAvailableColor() {
  		Color nextColor = Color.gray;
  		final ListIterator<MarkedColor> i = colorList.listIterator();
  
  		for (boolean found = false; i.hasNext() && !found;) {
  			final MarkedColor c = i.next();
  
  			if (c.isAvailable()) {
  				c.setAvailability(false);
  				nextColor = c.getColor();
  				found = true;
  			}
  		}
  		return nextColor;
  	}
  
  	public void giveBackColor(final Color c) {
  		if (colorList.contains(c)) {
  			colorList.get(colorList.indexOf(c)).setAvailability(true);
  		}
  	}
  }