/*
* Jalview - A Sequence Alignment Editor and Viewer
* Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
*/
package jalview.schemes;

import java.awt.*;

import jalview.datamodel.*;

public class AnnotationColourGradient extends ResidueColourScheme
{
    AlignmentAnnotation annotation;
    boolean aboveAnnotationThreshold = false;

    float r1, g1, b1, rr, gg, bb, dr, dg, db;
    float range;

    /**
     * Creates a new AnnotationColourGradient object.
     */
    public AnnotationColourGradient(AlignmentAnnotation annotation,
        Color minColour, Color maxColour, boolean aboveThreshold)
    {
      this.annotation = annotation;

      aboveAnnotationThreshold = aboveThreshold;

      r1 = minColour.getRed();
      g1 = minColour.getGreen();
      b1 = minColour.getBlue();

      rr = maxColour.getRed() - r1;
      gg = maxColour.getGreen() - g1;
      bb = maxColour.getBlue() - b1;

      range = annotation.graphMax - annotation.graphMin;

    }

    public Color getMinColour()
    {
      return new Color( (int) r1, (int) g1, (int) b1);
    }

    public Color getMaxColour()
    {
      return new Color( (int) (r1 + rr), (int) (g1 + gg), (int) (b1 + bb));
    }

    /**
     * DOCUMENT ME!
     *
     * @param n DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public Color findColour(String n)
    {
      System.out.println("AnnotationColourGradient findColour(string)");
        return Color.RED;
    }

    /**
     * DOCUMENT ME!
     *
     * @param n DOCUMENT ME!
     * @param j DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public Color findColour(String n, int j)
    {
        if ((threshold == 0) || aboveThreshold(n, j))
        {
          if(annotation.annotations[j]==null)
            currentColour = Color.white;
          else
          {
            if(!aboveAnnotationThreshold || (annotation.graphLines!=null
               && annotation.annotations[j].value>=annotation.getGraphLine(0).value))
            {
                dr = rr *
                     ((annotation.annotations[j].value-annotation.graphMin) / range )
                     +r1;
                dg = gg *
                     ((annotation.annotations[j].value-annotation.graphMin)  / range )
                     +g1;
                db = bb *
                     ((annotation.annotations[j].value-annotation.graphMin) / range )
                     +b1;

                 currentColour = new Color( (int) dr, (int) dg, (int) db);
            }
            else
              currentColour = Color.white;
          }
        }
        else
        {
            return Color.white;
        }

        if(conservationColouring)
         applyConservation(j);

       return currentColour;
    }
}