/*
 * 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.gui;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;

import jalview.datamodel.*;

public class AnnotationLabels
    extends JPanel implements MouseListener,
    MouseMotionListener, ActionListener
{
  static String ADDNEW = "Add New Row";
  static String HIDE = "Hide This Row";
  static String DELETE = "Delete This Row";
  static String SHOWALL = "Show All Hidden Rows";
  static String OUTPUT_TEXT = "Show Values In Textbox";
  boolean active = false;
  Image image;
  AlignmentPanel ap;
  boolean resizing = false;
  int oldY;
  int mouseX;
  int selectedRow = 0;
  int scrollOffset = 0;

  public AnnotationLabels(AlignmentPanel ap)
  {
    this.ap = ap;

    java.net.URL url = getClass().getResource("/images/idwidth.gif");
    Image temp = null;

    if (url != null)
    {
      temp = java.awt.Toolkit.getDefaultToolkit().createImage(url);
    }

    try
    {
      MediaTracker mt = new MediaTracker(this);
      mt.addImage(temp, 0);
      mt.waitForID(0);
    }
    catch (Exception ex)
    {
    }

    BufferedImage bi = new BufferedImage(temp.getHeight(this),
                                         temp.getWidth(this),
                                         BufferedImage.TYPE_INT_RGB);
    Graphics2D g = (Graphics2D) bi.getGraphics();
    g.rotate(Math.toRadians(90));
    g.drawImage(temp, 0, -bi.getWidth(this), this);
    image = (Image) bi;

    addMouseListener(this);
    addMouseMotionListener(this);
  }

  public void setScrollOffset(int y)
  {
    scrollOffset = y;
    repaint();
  }

  public void actionPerformed(ActionEvent evt)
  {
    AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();

    if (evt.getActionCommand().equals(ADDNEW))
    {
      String label = JOptionPane.showInputDialog(this,
                                                 "Label for annotation");

      if (label == null)
      {
        label = "";
      }

      ap.av.alignment.addAnnotation(new AlignmentAnnotation(label,
          "New description",
          new Annotation[ap.av.alignment.getWidth()]));
    }
    else if (evt.getActionCommand().equals(HIDE))
    {
      aa[selectedRow].visible = false;

      if (aa[selectedRow].label.equals("Conservation"))
      {
        ap.av.showConservation = false;
      }

      if (aa[selectedRow].label.equals("Quality"))
      {
        ap.av.showQuality = false;
      }

      if (aa[selectedRow].label.equals("Consensus"))
      {
        ap.av.showIdentity = false;
      }
    }
    else if (evt.getActionCommand().equals(DELETE))
    {
      ap.av.alignment.deleteAnnotation(aa[selectedRow]);
    }
    else if (evt.getActionCommand().equals(SHOWALL))
    {
      for (int i = 0; i < aa.length; i++)
      {
        aa[i].visible = true;
      }
    }
    else if (evt.getActionCommand().equals(OUTPUT_TEXT))
    {
      CutAndPasteTransfer cap = new CutAndPasteTransfer();
      Desktop.addInternalFrame(cap,
                               ap.alignFrame.getTitle() + " - " +
                               aa[selectedRow].label, 500,
                               100);
      cap.setText(aa[selectedRow].toString());
    }

    ap.annotationPanel.adjustPanelHeight();
    ap.repaint();
  }

  public void mousePressed(MouseEvent evt)
  {
    int y = evt.getY() - scrollOffset;

    AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();

    if ( (aa == null) || (aa.length == 0))
    {
      JPopupMenu pop = new JPopupMenu("Annotations");
      JMenuItem item = new JMenuItem(ADDNEW);
      item.addActionListener(this);
      pop.add(item);
      pop.show(this, evt.getX(), evt.getY());

      return;
    }

    int height = 0;

    for (int i = 0; i < aa.length; i++)
    {
      if (!aa[i].visible)
      {
        continue;
      }

      height += aa[i].height;

      if (y < height)
      {
        selectedRow = i;

        break;
      }
    }

    JPopupMenu pop = new JPopupMenu("Annotations");
    JMenuItem item = new JMenuItem(ADDNEW);
    item.addActionListener(this);
    pop.add(item);
    item = new JMenuItem(HIDE);
    item.addActionListener(this);
    pop.add(item);
    item = new JMenuItem(DELETE);
    item.addActionListener(this);
    pop.add(item);
    item = new JMenuItem(SHOWALL);
    item.addActionListener(this);
    pop.add(item);
    item = new JMenuItem(OUTPUT_TEXT);
    item.addActionListener(this);
    pop.add(item);
    pop.show(this, evt.getX(), evt.getY());

    oldY = evt.getY();
  }

  public void mouseReleased(MouseEvent evt)
  {
    active = false;
    repaint();
  }

  public void mouseEntered(MouseEvent evt)
  {
    active = true;
    repaint();
  }

  public void mouseExited(MouseEvent evt)
  {
    active = false;
    repaint();
  }

  public void mouseDragged(MouseEvent evt)
  {
    active = true;

    Dimension d = ap.annotationScroller.getPreferredSize();
    int dif = evt.getY() - oldY;

    dif /= ap.av.charHeight;
    dif *= ap.av.charHeight;

    if ( (d.height - dif) > 20)
    {
      ap.annotationScroller.setPreferredSize(new Dimension(d.width,
          d.height - dif));
      d = ap.annotationSpaceFillerHolder.getPreferredSize();
      ap.annotationSpaceFillerHolder.setPreferredSize(new Dimension(
          d.width, d.height - dif));
      ap.repaint();
    }

    ap.addNotify();
  }

  public void mouseMoved(MouseEvent evt)
  {
  }

  public void mouseClicked(MouseEvent evt)
  {
  }

  public void paintComponent(Graphics g1)
  {
    Graphics2D g = (Graphics2D) g1;
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                       RenderingHints.VALUE_ANTIALIAS_ON);

    drawComponent(g);
  }

  public void drawComponent(Graphics2D g)
  {
    FontMetrics fm = g.getFontMetrics(g.getFont());
    g.setColor(Color.white);
    g.fillRect(0, 0, getWidth(), getHeight());

    g.translate(0, scrollOffset);
    g.setColor(Color.black);

    AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();
    int y = g.getFont().getSize();
    int x = 0;

    if (aa != null)
    {
      for (int i = 0; i < aa.length; i++)
      {
        if (!aa[i].visible)
        {
          continue;
        }

        x = getWidth() - fm.stringWidth(aa[i].label) - 3;

        if (aa[i].isGraph)
        {
          y += (aa[i].height / 3);
        }

        g.drawString(aa[i].label, x, y);

        if (aa[i].isGraph)
        {
          y += ( (2 * aa[i].height) / 3);
        }
        else
        {
          y += aa[i].height;
        }
      }
    }

    if (active)
    {
      if (image != null)
      {
        g.drawImage(image, 2, 0, this);
      }
    }

    if ( (aa == null) || (aa.length < 1))
    {
      g.drawString("Right click", 2, 8);
      g.drawString("to add annotation", 2, 18);
    }
  }
}