/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2006 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.appletgui;

import java.awt.*;
import java.awt.event.*;

import jalview.datamodel.*;

public class AlignmentPanel extends Panel 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)
  {
    try
    {
      jbInit();
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }


    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);

    sequenceHolderPanel.add(annotationPanel, BorderLayout.SOUTH);

    alabels = new AnnotationLabels(this);

    setAnnotationVisible(av.showAnnotation);

    idPanelHolder.add(idPanel, BorderLayout.CENTER);
    idSpaceFillerPanel1.add(idwidthAdjuster, BorderLayout.CENTER);
    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);

    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);

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

  }


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

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

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

    validate();
    repaint();

    if(overviewPanel!=null)
          overviewPanel.updateOverviewImage();
  }

  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()
  {
    if (av.nullFrame == null)
    {
      av.nullFrame = new Frame();
      av.nullFrame.addNotify();
    }

    Graphics g = av.nullFrame.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);
      id = s.getDisplayId(av.getShowJVSuffix());

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

    // Also check annotation label widths
    i = 0;
    if (al.getAlignmentAnnotation() != null)
    {
      fm = g.getFontMetrics(av.nullFrame.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(SearchResults results)
  {
    seqPanel.seqCanvas.highlightSearchResults(results);

   // do we need to scroll the panel?
    if (results != null)
    {
      SequenceI seq = results.getResultSequence(0);
      int seqIndex = av.alignment.findIndex(seq);
      int start = seq.findIndex(results.getResultStart(0)) - 1;
      int end = seq.findIndex(results.getResultEnd(0)) - 1;

        if(!av.wrapAlignment)
        {
          if ( (av.getStartRes() > end)  || (av.getEndRes() < start) ||
             ( (av.getStartSeq() > seqIndex) || (av.getEndSeq() < seqIndex)))
          {
            if (start > av.alignment.getWidth() - hextent)
            {
              start = av.alignment.getWidth() - hextent;
              if (start < 0)
                start = 0;
            }
            if (seqIndex > av.alignment.getHeight() - vextent)
            {
              seqIndex = av.alignment.getHeight() - vextent;
              if (seqIndex < 0)
                seqIndex = 0;
            }
            setScrollValues(start, seqIndex);
          }
        }
        else
        {
          scrollToWrappedVisible(start);
        }
    }

    repaint();
  }

  void scrollToWrappedVisible(int res)
  {
    int cwidth = seqPanel.seqCanvas.getWrappedCanvasWidth(seqPanel.seqCanvas.getSize().width);
    if (res <= av.getStartRes() || res >= (av.getStartRes() + cwidth))
    {
      vscroll.setValue(res / cwidth);
      av.startRes = vscroll.getValue() * cwidth;
    }
  }


  public OverviewPanel getOverviewPanel()
  {
    return overviewPanel;
  }

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

  public void setAnnotationVisible(boolean b)
  {
    if (!av.wrapAlignment)
    {
      annotationSpaceFillerHolder.setVisible(b);
      annotationPanel.setVisible(b);
    }
    validate();
    repaint();
  }

  public void setWrapAlignment(boolean wrap)
  {
    av.startSeq = 0;
    scalePanelHolder.setVisible(!wrap);


    hscroll.setVisible(!wrap);
    idwidthAdjuster.setVisible(!wrap);

    if (wrap)
    {
      annotationPanel.setVisible(false);
      annotationSpaceFillerHolder.setVisible(false);
    }
    else if (av.showAnnotation)
    {
      annotationPanel.setVisible(true);
      annotationSpaceFillerHolder.setVisible(true);
    }


    idSpaceFillerPanel1.setVisible(!wrap);

    fontChanged();//This is so that the scalePanel is resized correctly

    validate();
    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;
      }
      setScrollValues(hscroll.getValue(), vscroll.getValue()-1);
    }
    else
    {
      if (vextent + vscroll.getValue() >= av.getAlignment().getHeight())
      {
        return false;
      }
      setScrollValues(hscroll.getValue(), vscroll.getValue()+1);
    }

    repaint();
    return true;
  }

  public boolean scrollRight(boolean right)
  {
    if (!right)
    {
      if (hscroll.getValue() < 1)
      {
        return false;
      }
      setScrollValues(hscroll.getValue()-1, vscroll.getValue());
    }
    else
    {
      if (hextent + hscroll.getValue() >= av.getAlignment().getWidth())
      {
        return false;
      }
      setScrollValues(hscroll.getValue()+1, vscroll.getValue());
    }

    repaint();
    return true;
  }

  public void setScrollValues(int x, int y)
  {
    int width = av.alignment.getWidth();
    int height = av.alignment.getHeight();

    if(av.hasHiddenColumns)
     width = av.getColumnSelection().findColumnPosition(width);

    av.setStartRes(x);
    av.setStartSeq(y);

    av.setEndRes( (x + (seqPanel.seqCanvas.getSize().width / av.charWidth)) -1);

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

    if (hextent > width)
    {
      hextent = width;
    }

    if (vextent > height)
    {
      vextent = height;
    }

    if ( (hextent + x) > width)
    {
      x = width - hextent;
    }

    if ( (vextent + y) > height)
    {
      y = height - 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());

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

  }

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


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


    if (evt==null || 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();
    }

    int scrollX = av.startRes - oldX;
    int scrollY = av.startSeq - oldY;

    if (av.getWrapAlignment() || !fastPaint || av.MAC)
    {
      repaint();
    }
    else
    {
      // Make sure we're not trying to draw a panel
      // larger than the visible window
      if(scrollX>av.endRes-av.startRes)
      {
        scrollX = av.endRes - av.startRes;
      }
      else if(scrollX<av.startRes-av.endRes)
        scrollX = av.startRes - av.endRes;

      idPanel.idCanvas.fastPaint(scrollY);
      seqPanel.seqCanvas.fastPaint(scrollX,
                                   scrollY);

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

  }

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

  public void paint(Graphics g)
  {
    invalidate();
    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);

    if (av.getWrapAlignment())
    {
      int maxwidth = av.alignment.getWidth();

      if (av.hasHiddenColumns)
        maxwidth = av.getColumnSelection().findColumnPosition(maxwidth) - 1;

      int canvasWidth = seqPanel.seqCanvas.getWrappedCanvasWidth
          (seqPanel.seqCanvas.getSize().width);

      if(canvasWidth>0)
      {
        int max = maxwidth / canvasWidth;
        vscroll.setMaximum(max);
        vscroll.setUnitIncrement(1);
        vscroll.setVisibleAmount(1);
      }
    }
    else
    {
      setScrollValues(av.getStartRes(), av.getStartSeq());
    }

    alabels.repaint();

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

    if (getBounds() == g.getClipBounds())
    {
      if (overviewPanel != null)
        overviewPanel.updateOverviewImage();
    }

  }

  protected Panel sequenceHolderPanel = new Panel();
  protected Scrollbar vscroll = new Scrollbar();
  protected Scrollbar hscroll = new Scrollbar();
  protected Panel seqPanelHolder = new Panel();
  BorderLayout borderLayout1 = new BorderLayout();
  BorderLayout borderLayout3 = new BorderLayout();
  protected Panel scalePanelHolder = new Panel();
  protected Panel idPanelHolder = new Panel();
  BorderLayout borderLayout5 = new BorderLayout();
  protected Panel idSpaceFillerPanel1 = new Panel();
  public Panel annotationSpaceFillerHolder = new Panel();
  BorderLayout borderLayout6 = new BorderLayout();
  BorderLayout borderLayout7 = new BorderLayout();
  Panel hscrollHolder = new Panel();
  BorderLayout borderLayout10 = new BorderLayout();
  protected Panel hscrollFillerPanel = new Panel();
  BorderLayout borderLayout11 = new BorderLayout();
  BorderLayout borderLayout4 = new BorderLayout();
  BorderLayout borderLayout2 = new BorderLayout();

  private void jbInit() throws Exception {
      //  idPanelHolder.setPreferredSize(new Dimension(70, 10));
      this.setLayout(borderLayout7);

      //   sequenceHolderPanel.setPreferredSize(new Dimension(150, 150));
      sequenceHolderPanel.setLayout(borderLayout3);
      seqPanelHolder.setLayout(borderLayout1);
      scalePanelHolder.setBackground(Color.white);

      // scalePanelHolder.setPreferredSize(new Dimension(10, 30));
      scalePanelHolder.setLayout(borderLayout6);
      idPanelHolder.setLayout(borderLayout5);
      idSpaceFillerPanel1.setBackground(Color.white);

      //  idSpaceFillerPanel1.setPreferredSize(new Dimension(10, 30));
      idSpaceFillerPanel1.setLayout(borderLayout11);
      annotationSpaceFillerHolder.setBackground(Color.white);

      //  annotationSpaceFillerHolder.setPreferredSize(new Dimension(10, 80));
      annotationSpaceFillerHolder.setLayout(borderLayout4);
      hscroll.setOrientation(Scrollbar.HORIZONTAL);
      hscrollHolder.setLayout(borderLayout10);
      hscrollFillerPanel.setBackground(Color.white);

      //  hscrollFillerPanel.setPreferredSize(new Dimension(70, 10));
      hscrollHolder.setBackground(Color.white);

      //    annotationScroller.setPreferredSize(new Dimension(10, 80));
      //  this.setPreferredSize(new Dimension(220, 166));
      seqPanelHolder.setBackground(Color.white);
      idPanelHolder.setBackground(Color.white);
      sequenceHolderPanel.add(scalePanelHolder, BorderLayout.NORTH);
      sequenceHolderPanel.add(seqPanelHolder, BorderLayout.CENTER);
      seqPanelHolder.add(vscroll, BorderLayout.EAST);

      //  Panel3.add(secondaryPanelHolder,  BorderLayout.SOUTH);
      this.add(idPanelHolder, BorderLayout.WEST);
      idPanelHolder.add(idSpaceFillerPanel1, BorderLayout.NORTH);
      idPanelHolder.add(annotationSpaceFillerHolder, BorderLayout.SOUTH);
      this.add(hscrollHolder, BorderLayout.SOUTH);
      hscrollHolder.add(hscroll, BorderLayout.CENTER);
      hscrollHolder.add(hscrollFillerPanel, BorderLayout.WEST);
      this.add(sequenceHolderPanel, BorderLayout.CENTER);
  }

}