package jalview.appletgui;

import jalview.jbappletgui.GAlignmentPanel;
import jalview.schemes.*;
import jalview.analysis.*;
import jalview.datamodel.*;
import java.awt.*;
import java.awt.event.*;

public class AlignmentPanel extends GAlignmentPanel implements AdjustmentListener
{

  AlignViewport     av;
  OverviewPanel overviewPanel;
  SeqPanel   seqPanel;
  IdPanel    idPanel;
  IdwidthAdjuster idwidthAdjuster;
  public AlignFrame alignFrame;
  ScalePanel scalePanel;
  AnnotationPanel annotationPanel;
  AnnotationLabels alabels;

  // this value is set false when selection area being dragged
  boolean fastPaint = true;

  public AlignmentPanel(AlignFrame af, final AlignViewport av)
  {
    alignFrame = af;
    this.av         = av;
    seqPanel        = new SeqPanel  (av, this);
    idPanel         = new IdPanel   (av, this);
    scalePanel      = new ScalePanel(av, this);
    idwidthAdjuster = new IdwidthAdjuster(this);
    annotationPanel = new AnnotationPanel(this);
    alabels         = new AnnotationLabels(this);


    idPanelHolder.add(idPanel, BorderLayout.CENTER);
    idSpaceFillerPanel1.add(idwidthAdjuster, BorderLayout.CENTER);
    annotationScroller.add(annotationPanel);
    annotationSpaceFillerHolder.add(alabels, BorderLayout.CENTER);
    scalePanelHolder.add(scalePanel, BorderLayout.CENTER);
    seqPanelHolder.add(seqPanel, BorderLayout.CENTER);

    fontChanged();
    setScrollValues(0, 0);

    hscroll.addAdjustmentListener(this);
    vscroll.addAdjustmentListener(this);

   seqPanel.seqCanvas.addKeyListener( new MyKeyAdapter() );
   idPanel.idCanvas.addKeyListener( new MyKeyAdapter() );

   addComponentListener(new ComponentAdapter()
     {
       public void componentResized(ComponentEvent evt)
       {
         setScrollValues(av.getStartRes(), av.getStartSeq());
         repaint();
       }
     });

     Dimension d = calculateIdWidth();
     idPanel.idCanvas.setSize(d);

     hscrollFillerPanel.setSize(d.width, annotationPanel.getSize().height);
     annotationScroller.setSize(annotationPanel.getSize());

     idPanel.idCanvas.setSize(d.width, seqPanel.seqCanvas.getSize().height);
     annotationSpaceFillerHolder.setSize(d.width,annotationPanel.getSize().height);
     alabels.setSize(d.width,annotationPanel.getSize().height);

  }

  class MyKeyAdapter extends KeyAdapter
  {
     public void keyPressed(KeyEvent evt)
     {
       // System.out.println(evt.getKeyCode()); log.
       switch(evt.getKeyCode())
       {
         case  27: // escape key
           av.setSelectionGroup(null);
           alignFrame.alignPanel.repaint();
           break;
         case KeyEvent.VK_X:
           if(evt.isControlDown())
           alignFrame.cut_actionPerformed(null);
           break;
         case KeyEvent.VK_C:
         if(evt.isControlDown())
           alignFrame.copy_actionPerformed(null);
           break;
         case KeyEvent.VK_V:
          if(evt.isControlDown())
           alignFrame.paste(true);
           break;
         case KeyEvent.VK_A:
         if(evt.isControlDown())
           alignFrame.selectAllSequenceMenuItem_actionPerformed(null);
           break;
        case KeyEvent.VK_DOWN:
          alignFrame.moveSelectedSequences(false);
          break;
        case KeyEvent.VK_UP:
          alignFrame.moveSelectedSequences(true);
          break;
        case KeyEvent.VK_F:
         if(evt.isControlDown())
          alignFrame.findMenuItem_actionPerformed(null);
          break;
       }
     }
  }

  public void fontChanged()
  {
    // set idCanvas bufferedImage to null
    // to prevent drawing old image
    FontMetrics fm = getFontMetrics(av.getFont());

    scalePanel.setSize(new Dimension(10, av.charHeight+fm.getDescent()));
    idwidthAdjuster.setSize(new Dimension(10, av.charHeight+fm.getDescent()));

    annotationPanel.adjustPanelHeight();
    annotationPanel.repaint();
    Dimension d = calculateIdWidth();
    d.setSize(d.width + 4, seqPanel.seqCanvas.getSize().height);
    idPanel.idCanvas.setSize(d);
    hscrollFillerPanel.setSize(d);

    alignFrame.pack();
  }

  public void setIdWidth(int w, int h)
  {
    idPanel.idCanvas.setSize(w,h);
    idPanelHolder.setSize(w,idPanelHolder.getSize().height);
    alabels.setSize(w,alabels.getSize().height);
    validate();
  }
  Dimension calculateIdWidth()
  {
    Frame frame = new Frame();
    frame.addNotify();
    Graphics g = frame.getGraphics();
    if(g==null)
    {
      Frame f = new Frame();
      f.addNotify();
      g = f.getGraphics();
    }

    FontMetrics fm = g.getFontMetrics(av.font);
    AlignmentI al = av.getAlignment();

       int i   = 0;
       int idWidth = 0;
       String id;
       while (i < al.getHeight() && al.getSequenceAt(i) != null)
       {
         SequenceI s   = al.getSequenceAt(i);
         if(av.getShowFullId())
           id   = s.getDisplayId();
         else
           id = s.getName();

         if (fm.stringWidth(id) > idWidth)
           idWidth = fm.stringWidth(id);
         i++;
       }

       // Also check annotation label widths
       i=0;
       if(al.getAlignmentAnnotation()!=null)
       {
         fm = g.getFontMetrics(frame.getFont());
         while (i < al.getAlignmentAnnotation().length)
         {
           String label = al.getAlignmentAnnotation()[i].label;
           if (fm.stringWidth(label) > idWidth)
             idWidth = fm.stringWidth(label);
           i++;
         }
       }

       return new Dimension(idWidth, idPanel.idCanvas.getSize().height);
  }


 public void highlightSearchResults(int [] results)
 {
   seqPanel.seqCanvas.highlightSearchResults( results );

   // do we need to scroll the panel?
   if(results!=null)
    {
      SequenceI seq = av.alignment.getSequenceAt(results[0]);
      int start = seq.findIndex( results[1] )-1;
      int end = seq.findIndex( results[2] )-1;
      if( av.getStartRes() > start
          || av.getEndRes() < end
          || (av.getStartSeq() > results[0]
          || av.getEndSeq() < results[0]))
        setScrollValues(start, results[0]);
    }

 }


 public OverviewPanel getOverviewPanel()
 {
   return overviewPanel;
 }

 public void setOverviewPanel(OverviewPanel op)
 {
   overviewPanel = op;
 }


  public void setAnnotationVisible(boolean b)
  {
    annotationSpaceFillerHolder.setVisible(b);
    annotationScroller.setVisible(b);
    validate();
    repaint();
  }


  public void setWrapAlignment(boolean wrap)
  {
    scalePanelHolder.setVisible(!wrap);
    hscroll.setVisible(!wrap);
    idwidthAdjuster.setVisible(!wrap);

    av.setShowAnnotation(!wrap);
    annotationScroller.setVisible(!wrap);
    annotationSpaceFillerHolder.setVisible(!wrap);
    idSpaceFillerPanel1.setVisible(!wrap);

    validate();
    repaint();

  }


  public void setColourScheme()
  {
    ColourSchemeI cs = av.getGlobalColourScheme();

    if(av.getConservationSelected())
    {

       Alignment al = (Alignment)av.getAlignment();
       Conservation c = new Conservation("All",
                            ResidueProperties.propHash, 3, al.getSequences(), 0,
                            al.getWidth() );

       c.calculate();
       c.verdict(false, av.ConsPercGaps);
       ConservationColourScheme ccs = new ConservationColourScheme(c, cs);

       av.setGlobalColourScheme( ccs );

    }

    repaint();
  }


  int hextent = 0;
  int vextent = 0;

  // return value is true if the scroll is valid
  public boolean scrollUp(boolean up)
  {
    if(up)
    {
      if(vscroll.getValue()<1)
        return false;
      fastPaint  = false;
      vscroll.setValue(vscroll.getValue() - 1);
    }
    else
    {
     if(vextent+vscroll.getValue() >= av.getAlignment().getHeight())
       return false;
      fastPaint  = false;
      vscroll.setValue(vscroll.getValue() + 1);
    }
    fastPaint = true;
    return true;
  }

  public boolean scrollRight(boolean right)
  {

    if (right)
    {
      if (hscroll.getValue() < 1)
        return false;
      fastPaint = false;
      hscroll.setValue(hscroll.getValue() - 1);
    }
    else
    {
      if (hextent + hscroll.getValue() >= av.getAlignment().getWidth())
        return false;
      fastPaint = false;
      hscroll.setValue(hscroll.getValue() + 1);
    }
    fastPaint = true;
    return true;
  }


  public void setScrollValues(int x, int y)
  {

    av.setStartRes(x);
    av.setStartSeq(y);
    av.setEndRes(x + seqPanel.seqCanvas.getSize().width/av.getCharWidth()-1);

    hextent = seqPanel.seqCanvas.getSize().width/av.charWidth;
    vextent = seqPanel.seqCanvas.getSize().height/av.charHeight;

    if(hextent > av.alignment.getWidth())
      hextent = av.alignment.getWidth();
    if(vextent > av.alignment.getHeight())
      vextent = av.alignment.getHeight();

    if(hextent+x  >  av.getAlignment().getWidth())
      x =  av.getAlignment().getWidth()- hextent;

    if(vextent+y > av.getAlignment().getHeight())
      y = av.getAlignment().getHeight() - vextent;

    if(y<0)
      y = 0;

    if(x<0)
      x=0;


    int endSeq = y + vextent;
    if(endSeq>av.alignment.getHeight())
      endSeq = av.alignment.getHeight();


    av.setEndSeq( endSeq );
    hscroll.setValues(x,hextent,0,av.getAlignment().getWidth());
    vscroll.setValues(y,vextent,0,av.getAlignment().getHeight() );

  }


  public void adjustmentValueChanged(AdjustmentEvent evt)
  {
    int oldX = av.getStartRes();
    int oldY = av.getStartSeq();

    if (evt.getSource() == hscroll)
    {
      int x = hscroll.getValue();
      av.setStartRes(x);
      av.setEndRes(x + seqPanel.seqCanvas.getSize().width/av.getCharWidth()-1);
    }

    if (evt.getSource() == vscroll)
    {
      int offy = vscroll.getValue();
      if (av.getWrapAlignment())
      {
        int rowSize = seqPanel.seqCanvas.getWrappedCanvasWidth(seqPanel.seqCanvas.getSize().width);
        av.setStartRes( vscroll.getValue() * rowSize );
        av.setEndRes( (vscroll.getValue()+1) * rowSize );
      }
      else
      {
        av.setStartSeq(offy);
        av.setEndSeq(offy + seqPanel.seqCanvas.getSize().height / av.getCharHeight());
      }
    }

    if(overviewPanel!=null)
      overviewPanel.setBoxPosition();

    if(av.getWrapAlignment() || !fastPaint)
      repaint();
    else
    {
      idPanel.idCanvas.fastPaint(av.getStartSeq() - oldY);
      seqPanel.seqCanvas.fastPaint(av.getStartRes() - oldX,
                                   av.getStartSeq() - oldY);

      scalePanel.repaint();
      if (av.getShowAnnotation())
        annotationPanel.fastPaint(av.getStartRes() - oldX);
    }

  }

  public void update(Graphics g)
  {
    paint (g);
  }


  public void paint(Graphics g)
  {
    Dimension d = idPanel.idCanvas.getSize();
    idPanel.idCanvas.setSize(d.width, seqPanel.seqCanvas.getSize().height);
    annotationSpaceFillerHolder.setSize(d.width,annotationPanel.getSize().height);
    alabels.setSize(d.width,annotationPanel.getSize().height);

    alabels.repaint();
    idPanel.idCanvas.repaint();
    seqPanel.seqCanvas.repaint();
    scalePanel.repaint();
    annotationPanel.repaint();


    if (av.getWrapAlignment())
    {
      int max = av.alignment.getWidth() / seqPanel.seqCanvas.getWrappedCanvasWidth(seqPanel.seqCanvas.getSize().width);
      vscroll.setMaximum(max);
      vscroll.setUnitIncrement(1);
      vscroll.setVisibleAmount(1);
    }
    else
    {
      setScrollValues(av.getStartRes(), av.getStartSeq());
    }



  }
}