package jalview.gui;

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

public class AnnotationLabels extends JPanel implements MouseListener, MouseMotionListener, ActionListener
{
  boolean active = false;
  Image image;
  AlignmentPanel ap ;
  boolean resizing = false;
  int oldY, mouseX;
  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";
  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;
   }
   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;
   }

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

  }

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

    if (SwingUtilities.isRightMouseButton(evt))
    {
       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);
      pop.show(this, evt.getX(), evt.getY());
      return;
    }

    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);
   }



  }

}