/*
 * Jalview - A Sequence Alignment Editor and Viewer (Development Version 2.4.1)
 * Copyright (C) 2009 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.util.*;

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

import jalview.datamodel.*;
import jalview.schemes.*;
import java.awt.Dimension;

public class FeatureColourChooser extends JPanel
{
  JInternalFrame frame;
  
  FeatureRenderer fr;

  FeatureSettings fs;

  GraduatedColor cs;
  Object oldcs;

  Hashtable oldgroupColours;
  
  AlignmentPanel ap;
  

  boolean adjusting = false;

  private float min;

  private float max;
  String type = null;
  public FeatureColourChooser(FeatureSettings fsettings, String type)
  {
    this.fs = fsettings;
    this.type = type;
    fr = fsettings.fr;
    ap = fr.ap;
    frame = new JInternalFrame();
    frame.setContentPane(this);
    frame.setLayer(JLayeredPane.PALETTE_LAYER);
    Desktop.addInternalFrame(frame, "Graduated Feature Colour for "+type, 480, 145);

    slider.addChangeListener(new ChangeListener()
    {
      public void stateChanged(ChangeEvent evt)
      {
        if (!adjusting)
        {
          thresholdValue.setText(((float) slider.getValue() / 1000f) + "");
          valueChanged();
        }
      }
    });
    slider.addMouseListener(new MouseAdapter()
    {
      public void mouseReleased(MouseEvent evt)
      {
        if (fr.ap!=null) { fr.ap.paintAlignment(true); };
      }
    });

    float mm[] = ((float[][]) fr.minmax.get(type))[0];
    min = mm[0];
    max = mm[1];
    oldcs = fr.featureColours.get(type);
    if (oldcs instanceof GraduatedColor)
    {
      if (((GraduatedColor)oldcs).isAutoScale())
      {
        // update the scale
        cs = new GraduatedColor((GraduatedColor) oldcs, min, max);
      } else {
        cs = new GraduatedColor((GraduatedColor) oldcs);
      }
    } else {
      // promote original color to a graduated color
      Color bl = Color.black;
      if (oldcs instanceof Color)
      {
        bl = (Color) oldcs;
      }
      // original colour becomes the maximum colour
      cs = new GraduatedColor(Color.white,bl,mm[0],mm[1]);
    }
    minColour.setBackground(cs.getMinColor());
    maxColour.setBackground(cs.getMaxColor());
    adjusting = true;
    
    try
    {
      jbInit();
    } catch (Exception ex)
    {
    }
    // update the gui from threshold state
    thresholdIsMin.setSelected(!cs.isAutoScale());
    if (cs.getThreshType()!=AnnotationColourGradient.NO_THRESHOLD)
    {
      // initialise threshold slider and selector
      threshold.setSelectedIndex(cs.getThreshType()==AnnotationColourGradient.ABOVE_THRESHOLD ? 1 : 2);
            slider.setEnabled(true);
      thresholdValue.setEnabled(true);
      threshline = new jalview.datamodel.GraphLine(
                        (max - min) / 2f,
                        "Threshold", Color.black);
      
    }

    adjusting = false;

    changeColour();

  }

  public FeatureColourChooser()
  {
    try
    {
      jbInit();
    } catch (Exception ex)
    {
      ex.printStackTrace();
    }
  }

  private void jbInit() throws Exception
  {
    minColour.setFont(new java.awt.Font("Verdana", Font.PLAIN, 11));
    minColour.setBorder(BorderFactory.createEtchedBorder());
    minColour.setPreferredSize(new Dimension(40, 20));
    minColour.setToolTipText("Minimum Colour");
    minColour.addMouseListener(new MouseAdapter()
    {
      public void mousePressed(MouseEvent e)
      {
        if (minColour.isEnabled())
        {
          minColour_actionPerformed();
        }
      }
    });
    maxColour.setFont(new java.awt.Font("Verdana", Font.PLAIN, 11));
    maxColour.setBorder(BorderFactory.createEtchedBorder());
    maxColour.setPreferredSize(new Dimension(40, 20));
    maxColour.setToolTipText("Maximum Colour");
    maxColour.addMouseListener(new MouseAdapter()
    {
      public void mousePressed(MouseEvent e)
      {
        if (maxColour.isEnabled())
        {
          maxColour_actionPerformed();
        }
      }
    });
    ok.setOpaque(false);
    ok.setText("OK");
    ok.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        ok_actionPerformed(e);
      }
    });
    cancel.setOpaque(false);
    cancel.setText("Cancel");
    cancel.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        cancel_actionPerformed(e);
      }
    });
    this.setLayout(borderLayout1);
    jPanel2.setLayout(flowLayout1);
    jPanel1.setBackground(Color.white);
    jPanel2.setBackground(Color.white);
    threshold.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        threshold_actionPerformed(e);
      }
    });
    threshold.addItem("No Threshold"); // index 0
    threshold.addItem("Above Threshold"); // index 1
    threshold.addItem("Below Threshold"); // index 2
    jPanel3.setLayout(flowLayout2);
    thresholdValue.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        thresholdValue_actionPerformed(e);
      }
    });
    slider.setPaintLabels(false);
    slider.setPaintTicks(true);
    slider.setBackground(Color.white);
    slider.setEnabled(false);
    slider.setOpaque(false);
    slider.setPreferredSize(new Dimension(100, 32));
    thresholdValue.setEnabled(false);
    thresholdValue.setColumns(7);
    jPanel3.setBackground(Color.white);
    currentColours.setFont(new java.awt.Font("Verdana", Font.PLAIN, 11));
    currentColours.setOpaque(false);
    currentColours.setText("Use Original Colours");
    currentColours.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        currentColours_actionPerformed(e);
      }
    });
    thresholdIsMin.setBackground(Color.white);
    thresholdIsMin.setText("Threshold is Min/Max");
    thresholdIsMin.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent actionEvent)
      {
        thresholdIsMin_actionPerformed(actionEvent);
      }
    });
    jPanel1.add(ok);
    jPanel1.add(cancel);
    // jPanel2.add(currentColours);
    jPanel2.add(minColour);
    jPanel2.add(maxColour);
    this.add(jPanel3, java.awt.BorderLayout.CENTER);
    jPanel3.add(threshold);
    jPanel3.add(slider);
    jPanel3.add(thresholdValue);
    jPanel3.add(thresholdIsMin);
    this.add(jPanel1, java.awt.BorderLayout.SOUTH);
    this.add(jPanel2, java.awt.BorderLayout.NORTH);
  }


  JPanel minColour = new JPanel();

  JPanel maxColour = new JPanel();

  JButton ok = new JButton();

  JButton cancel = new JButton();

  JPanel jPanel1 = new JPanel();

  JPanel jPanel2 = new JPanel();

  BorderLayout borderLayout1 = new BorderLayout();

  JComboBox threshold = new JComboBox();

  FlowLayout flowLayout1 = new FlowLayout();

  JPanel jPanel3 = new JPanel();

  FlowLayout flowLayout2 = new FlowLayout();

  JSlider slider = new JSlider();

  JTextField thresholdValue = new JTextField(20);
  // TODO refactor to tolower flag
  JCheckBox currentColours = new JCheckBox();

  JCheckBox thresholdIsMin = new JCheckBox();

  private GraphLine threshline;

  public void minColour_actionPerformed()
  {
    Color col = JColorChooser.showDialog(this,
            "Select Colour for Minimum Value", minColour.getBackground());
    if (col != null)
    {
      minColour.setBackground(col);
    }
    minColour.repaint();
    changeColour();
  }

  public void maxColour_actionPerformed()
  {
    Color col = JColorChooser.showDialog(this,
            "Select Colour for Maximum Value", maxColour.getBackground());
    if (col != null)
    {
      maxColour.setBackground(col);
    }
    maxColour.repaint();
    changeColour();
  }

  void changeColour()
  {
    // Check if combobox is still adjusting
    if (adjusting)
    {
      return;
    }


    int aboveThreshold = AnnotationColourGradient.NO_THRESHOLD;
    if (threshold.getSelectedItem().equals("Above Threshold"))
    {
      aboveThreshold = AnnotationColourGradient.ABOVE_THRESHOLD;
    }
    else if (threshold.getSelectedItem().equals("Below Threshold"))
    {
      aboveThreshold = AnnotationColourGradient.BELOW_THRESHOLD;
    } 

    slider.setEnabled(true);
    thresholdValue.setEnabled(true);
    GraduatedColor acg = new GraduatedColor(minColour.getBackground(), maxColour.getBackground(), min, max);

    if (aboveThreshold == AnnotationColourGradient.NO_THRESHOLD)
    {
      slider.setEnabled(false);
      thresholdValue.setEnabled(false);
      thresholdValue.setText("");
    }
    else if (aboveThreshold != AnnotationColourGradient.NO_THRESHOLD
            && threshline == null)
    {
      // todo visual indication of feature threshold
      threshline = new jalview.datamodel.GraphLine(
                      (max - min) / 2f,
                      "Threshold", Color.black);
    }

    if (aboveThreshold != AnnotationColourGradient.NO_THRESHOLD)
    {
      adjusting = true;
      acg.setThresh(threshline.value);

      float range = max * 1000f
              - min * 1000f;

      slider.setMinimum((int) (min * 1000));
      slider.setMaximum((int) (max * 1000));
      slider.setValue((int) (threshline.value * 1000));
      thresholdValue.setText(threshline.value + "");
      slider.setMajorTickSpacing((int) (range / 10f));
      slider.setEnabled(true);
      thresholdValue.setEnabled(true);
      adjusting = false;
    }

    acg.setThreshType(aboveThreshold);
    if (thresholdIsMin.isSelected() && aboveThreshold != AnnotationColourGradient.NO_THRESHOLD)
    {
      acg.setAutoScaled(false);
      if (aboveThreshold==AnnotationColourGradient.ABOVE_THRESHOLD)
      { 
        acg = new GraduatedColor(acg, threshline.value, max);
      } else { 
        acg = new GraduatedColor(acg, min,threshline.value);
      }
    } else {
      acg.setAutoScaled(true);
    }
    
    fr.featureColours.put(type,acg);
    cs = acg;
    ap.paintAlignment(false);
  }

  public void ok_actionPerformed(ActionEvent e)
  {
    changeColour();
    try
    {
      frame.setClosed(true);
    } catch (Exception ex)
    {
    }
  }

  public void cancel_actionPerformed(ActionEvent e)
  {
    reset();
    try
    {
      frame.setClosed(true);
    } catch (Exception ex)
    {
    }
  }

  void reset()
  {
    fr.featureColours.put(type, oldcs);
  }

  public void thresholdCheck_actionPerformed(ActionEvent e)
  {
    changeColour();
  }

  public void annotations_actionPerformed(ActionEvent e)
  {
    changeColour();
  }

  public void threshold_actionPerformed(ActionEvent e)
  {
    changeColour();
  }

  public void thresholdValue_actionPerformed(ActionEvent e)
  {
    try
    {
      float f = Float.parseFloat(thresholdValue.getText());
      slider.setValue((int) (f * 1000));
      threshline.value = f;
    } catch (NumberFormatException ex)
    {
    }
  }

  public void valueChanged()
  {
    threshline.value = (float) slider.getValue() / 1000f;
    cs.setThresh(threshline.value);
    changeColour();
    ap.paintAlignment(false);
  }

  public void currentColours_actionPerformed(ActionEvent e)
  {
    if (currentColours.isSelected())
    {
      reset();
    }

    maxColour.setEnabled(!currentColours.isSelected());
    minColour.setEnabled(!currentColours.isSelected());

    changeColour();
  }

  public void thresholdIsMin_actionPerformed(ActionEvent actionEvent)
  {
    changeColour();
  }

}