package jalview.ext.ensembl;

import jalview.ext.ensembl.EnsemblSpecies.EnsemblTaxon;

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.util.Arrays;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.AbstractDocument;
import javax.swing.text.JTextComponent;

public class EnsemblSpeciesDemo
{
  /**
   * Main method may be run interactively to explore a dynamic drop-down list that
   * populates with matches of Ensembl taxon ids, names or aliases
   * 
   * @param args
   */
  public static void main(String[] args)
  {
    // Schedule a job for the event dispatch thread:
    // creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable()
    {
      @Override
      public void run()
      {
        createAndShowGUI();
      }
    });
  }

  /**
   * Create the GUI and show it. For thread safety, this method should be invoked
   * from the event dispatch thread.
   */
  private static void createAndShowGUI()
  {
    JFrame frame = new JFrame("Taxon drop-down demo");
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    JComponent newContentPane = new JPanel(new FlowLayout());
    newContentPane.setOpaque(true);
    newContentPane.setPreferredSize(new Dimension(400, 300));
    frame.setContentPane(newContentPane);

    JLabel label = new JLabel("Taxon:");
    newContentPane.add(label);

    JComboBox<String> combo = new JComboBox<>();
    combo.setEditable(true);
    combo.setPreferredSize(new Dimension(200, 20));
    newContentPane.add(combo);
    AbstractDocument document = (AbstractDocument) ((JTextComponent) combo
            .getEditor().getEditorComponent()).getDocument();
    document.addDocumentListener(new DocumentListener()
    {
      @Override
      public void insertUpdate(DocumentEvent e)
      {
        refreshComboList(combo, document);
      }

      @Override
      public void removeUpdate(DocumentEvent e)
      {
        refreshComboList(combo, document);
      }

      @Override
      public void changedUpdate(DocumentEvent e)
      {
      }
    });

    frame.pack();
    frame.setVisible(true);
  }

  /**
   * Refreshes the combo box list to contain what the user has typed, plus any
   * matches for Ensembl taxon id, name or alias
   * 
   * @param combo
   * @param document 
   */
  protected static void refreshComboList(JComboBox<String> combo, AbstractDocument document)
  {
    String typed = (String) combo.getEditor().getItem();
    if (typed.length() > 1)
    {
      List<EnsemblTaxon> matches = EnsemblSpecies.getSpecies(true)
              .getNameMatches(typed);
      String[] items = new String[matches.size()];
      int i = 0;
      for (EnsemblTaxon m : matches)
      {
        items[i++] = String.format("%s (%s)", m.displayName, m.ncbiId);
      }
      Arrays.sort(items, String.CASE_INSENSITIVE_ORDER);
      combo.setModel(new DefaultComboBoxModel<>(items));
    }
  }
}