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/*
 * JBoss, the OpenSource J2EE webOS
 * 
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */
package org.drools.examples.sudoku;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;

import org.drools.examples.sudoku.rules.DroolsSudokuGridModel;
import org.drools.examples.sudoku.swing.SudokuGridSamples;
import org.drools.examples.sudoku.swing.SudokuGridView;

/**
 * This example shows how Drools can be used to solve a 9x9 Sudoku Grid.
 * Pete Bennett
 * @version $Revision: 1.1 $
 */
public class Main
   implements ActionListener
{
   private JFrame mainFrame;
   private SudokuGridView sudokuGridView;
   private DroolsSudokuGridModel droolsSudokuGridModel;
   private JMenuBar menuBar = new JMenuBar();
   private JMenu fileMenu = new JMenu("File");
   private JMenu samplesMenu = new JMenu("Samples");
   private JMenuItem openMenuItem = new JMenuItem("Open...");
   private JMenuItem exitMenuItem = new JMenuItem("Exit");
   private BorderLayout borderLayout = new BorderLayout();
   private FlowLayout flowLayout = new FlowLayout(FlowLayout.RIGHT);
   private JPanel buttonPanel = new JPanel(flowLayout);
   private JButton solveButton = new JButton("Solve");
   private JFileChooser fileChooser;
   
   public static void main(String[] args)
   {
      @SuppressWarnings("unused")
      Main main = new Main();
   }
   
   public Main()
   {
      mainFrame = new JFrame("Drools Sudoku Example");
      for (String sampleName : SudokuGridSamples.getInstance().getSampleNames())
      {
         JMenuItem menuItem = new JMenuItem(sampleName);
         menuItem.addActionListener(this);
         samplesMenu.add(menuItem);
      }
      fileMenu.add(samplesMenu);
      openMenuItem.addActionListener(this);
      // fileMenu.add(openMenuItem);
      exitMenuItem.addActionListener(this);
      fileMenu.add(exitMenuItem);
      menuBar.add(fileMenu);
      mainFrame.setJMenuBar(menuBar);
      sudokuGridView = new SudokuGridView();
      droolsSudokuGridModel = new DroolsSudokuGridModel(SudokuGridSamples.getInstance().getSample("Simple"));
      mainFrame.setLayout(borderLayout);
      mainFrame.add(BorderLayout.CENTER, sudokuGridView);
      // buttonPanel.add(fireOneRuleButton);
      buttonPanel.add(solveButton);
      solveButton.addActionListener(this);
      mainFrame.add(BorderLayout.SOUTH, buttonPanel);
      mainFrame.setSize(400,400);
      mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      mainFrame.setVisible(true);
      sudokuGridView.setModel(droolsSudokuGridModel);
   }

   public void actionPerformed(ActionEvent ev)
   {
      if (ev.getSource().equals(solveButton))
      {
         long startTime = System.currentTimeMillis();

         if (droolsSudokuGridModel.solve())
         {
            solveButton.setText("Solved ("+(System.currentTimeMillis()-startTime)+" ms)");
            solveButton.setEnabled(false);
         }
         else
         {
            solveButton.setText("Unsolved ("+(System.currentTimeMillis()-startTime)+" ms)");
            solveButton.setEnabled(false);            
         }
      }
      else if (ev.getSource().equals(openMenuItem))
      {
         if (fileChooser == null)
         {
            fileChooser = new JFileChooser();
         }
         
         try
         {
            if (fileChooser.showOpenDialog(mainFrame) == JFileChooser.APPROVE_OPTION)
            {
               System.out.println(fileChooser.getSelectedFile().getCanonicalPath());
            }
         }
         catch (IOException ex)
         {
            ex.printStackTrace();
         }
      }
      else if (ev.getSource().equals(exitMenuItem))
      {
         System.exit(0);
      }
      else if (ev.getSource() instanceof JMenuItem)
      {
         JMenuItem menuItem = (JMenuItem) ev.getSource();
         droolsSudokuGridModel = new DroolsSudokuGridModel(SudokuGridSamples.getInstance().getSample(menuItem.getText()));
         sudokuGridView.setModel(droolsSudokuGridModel);
         solveButton.setText("Solve");
         solveButton.setEnabled(true);
      }
      else
      {
         //
      }
   }
}