package jalview.gui;

import jalview.datamodel.*;
import jalview.schemes.*;

import java.awt.*;
import java.util.*;

public class SequenceRenderer implements RendererI
{
  FontMetrics fm;
  AlignViewport av;

  public Color getResidueBoxColour(ColourSchemeI cs, SequenceI seq, int i) {
    Color c = Color.WHITE;

    try{
      if (cs != null)
        c = cs.findColour(seq, seq.getSequence(i, i + 1), i, null);
    }catch(Exception ex)
    {    }

    return c;
  }

  public void drawSequence(Graphics g,ColourSchemeI cs,SequenceI seq,int start, int end, int x1, int y1, double width, int height,boolean showScores, boolean displayBoxes, boolean displayText,Vector freq, int seqnum,AlignViewport av) {

    this.av = av;

    if (displayBoxes == true) {
        drawBoxes(g,cs,seq,start,end,x1,y1,(int)width, height,freq);
    }
    if (displayText == true) {
        fm = g.getFontMetrics();
        drawText(g,cs,seq,start,end,x1,y1,(int)width,height);
    }
  }

  public void drawBoxes(Graphics g,ColourSchemeI cs, SequenceI seq,int start, int end, int x1, int y1, int width, int height,Vector freq) {
    int i      = start;
    int length = seq.getLength();

    Color currentColor = Color.WHITE;

    int curStart = x1;
    int curWidth = width;

  //  int threshold = 80;

    while (i <= end && i < length) {
      Color c = getResidueBoxColour(cs,seq,i);

    //  Hashtable hash  = (Hashtable)freq.elementAt(i-start);
    //  String    s     = (String)hash.get("maxResidue");
    //  int       count = ((Integer)hash.get("maxCount")).intValue();
  //    int       max   = ((Integer)hash.get("size")).intValue();
   //   int       nongap = ((Integer)hash.get("nongap")).intValue();
   //   float     frac  = (float)(count*1.0/(1.0*nongap));

      //System.out.println("Frac/count/nongap " + frac + " " + count + " " + nongap);
    /*  if (!seq.getSequence().substring(i,i+1).equals(s) ||
	  s.equals("-") ||
	  s.equals(".") ||
	  s.equals(" "))
      {
	c = Color.white;
      } else {
	if (frac > 0.9) {
	  c = Color.red;
	} else if (frac > 0.8) {
	  c = Color.orange;
	} else if (frac > 0.7) {
	  c = Color.pink;
	} else if (frac > 0.5) {
	  c = Color.yellow;
	} else if (frac> 0.3) {
	    c = Color.lightGray;
	}
      }*/

      if (c != currentColor || c != null)
      {
        g.fillRect(x1+width*(curStart-start),y1,curWidth,height);

        currentColor = c;
        g.setColor(c);

        curStart = i;
        curWidth = width;
      }
      else
        curWidth += width;

      i++;
    }
    g.fillRect(x1+width*(curStart-start),y1,curWidth,height);
  }

  public void drawText(Graphics g, ColourSchemeI cs, SequenceI seq,int start, int end, int x1, int y1, int width, int height)
  {
    int pady = height/5;
    int charOffset=0;
    g.setColor(Color.black);
    boolean colourText = av.getColourText();
    Color c;
    char s;
    // Need to find the sequence position here.
    for (int i = start; i <= end; i++)
    {
        if (i < end && i < seq.getLength())
          s = seq.getSequence().charAt(i);
        else if(i<seq.getLength())
          s = seq.getSequence().charAt(i);
        else
          s = ' ';

        if (colourText)
        {
            c = getResidueBoxColour(cs, seq, i);
            g.setColor(c.darker());
        }

      charOffset =  (width - fm.charWidth(s))/2;


      g.drawString(String.valueOf(s), charOffset + x1 + width * (i - start), y1 + height - pady);
    }
  }

}