// Copyright Hugh Perkins 2009
// hughperkins@gmail.com http://manageddreams.com
//
// 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 in the file licence.txt; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
// 1307 USA
// You can find the licence also on the web at:
// http://www.opensource.org/licenses/gpl-license.php
//
// ======================================================================================
//

package hughai.ui;

import java.util.*;
import java.util.List;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;

import javax.swing.*;
import javax.script.*;
import javax.xml.transform.stream.StreamResult;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.URL;
import java.net.URLClassLoader;

import hughai.*;
import hughai.loader.utils.Loader;
import hughai.utils.*;

// provides a console tab to the gui that lets us execute code
// on the fly!
// is that wicked or wot! :-D
public class ConsoleJava {
   final String classdir = "console-classes";
   final String jarfilename = "Console.jar";
   final String consoletemplatefilename = "JavaConsoleTemplate.txt";
   
//   final String classpath="$aidir/SkirmishAI.jar:$aidir/UnderlyingAI.jar:$aidir/../../Interfaces/Java/0.1/AIInterface.jar"; 

//   JFrame frame;
   JPanel textpanel;
   GridLayout gridLayout;
   JTextArea textarea;
   JButton gobutton;
   JButton quitbutton;

   JTextArea outputTextarea;
   
   PlayerObjects playerObjects;
   
   public ConsoleJava( PlayerObjects playerObjects ) {
      this.playerObjects = playerObjects;
      
      init();
   }
   
   void init () {
      try {
//      frame = new JFrame("Console");
//      frame.setSize( 400, 400 );
         
         JPanel outerpanel = new JPanel(new BorderLayout());

      gridLayout = new GridLayout( 2, 1 );
      textpanel = new JPanel( gridLayout );
//      frame.add( panel );
      
      JPanel buttonpanel = new JPanel(new GridLayout(1,2));
      
      outerpanel.add( "Center", textpanel );
      outerpanel.add( "South", buttonpanel );

      textarea = new JTextArea();
      JScrollPane scrollPane = new JScrollPane( textarea );

      outputTextarea = new JTextArea();
      JScrollPane outputscrollpane = new JScrollPane( outputTextarea );

      gobutton = new JButton( "Go" );
      quitbutton = new JButton( "Quit" );
      String templatepath = playerObjects.getCSAI().getAIDirectoryPath() + consoletemplatefilename;
      FileHelper fileHelper = new FileHelper( playerObjects );
      String initialFile = fileHelper.readFile( templatepath );
      if( initialFile != null ) {
         textarea.setText( initialFile );
      } else {
         textarea.setText("<Missing file " + templatepath + ">" );
      }

      gobutton.addActionListener( new GoButton() );
      quitbutton.addActionListener( new QuitButton() );

      textpanel.add( scrollPane );
      textpanel.add( outputscrollpane );
      buttonpanel.add( gobutton );
      buttonpanel.add( quitbutton );

      playerObjects.getMainUI().addPanelToTabbedPanel( "Java Console", outerpanel );
//      frame.validate();
//      frame.setVisible( true );
      } catch( Exception e ) {
         playerObjects.getLogFile().WriteLine( Formatting.exceptionToStackTrace( e ) );
         throw new RuntimeException( e );
      }
   }

   // kind of hacky quick fix for linux vs Windows
   // there must be a better way of doing this...
   String localizeClassPath( String classpath ) {
      if( File.separator.equals("/") ) { // linux (and mac?)
         return classpath.replace( ";", ":" ).replace( "\\", "/" );
      } else {  // windows
         return classpath.replace( ":", ";" ).replace( "/", "\\" );         
      }
   }
   
   void debug( Object message ) {
      playerObjects.getLogFile().WriteLine( "" + message );
   }

   class GoButton implements ActionListener {
      @Override
      public void actionPerformed( ActionEvent event ) {
         try {
//            String ourdir = "/home/user/persist/workspace/Test/";
            String ourdir = playerObjects.getCSAI().getAIDirectoryPath();

            System.out.println( textarea.getText() );
            new File( ourdir + "src-console" + File.separator + "console").mkdirs();
            PrintWriter printWriter = new PrintWriter( 
                  ourdir
                  + "src-console" + File.separator
                  + "console" + File.separator
                  + "ConsoleText.java" );
            printWriter.write( textarea.getText() );
            printWriter.write( "\n" );
            printWriter.close();

            new File( ourdir + classdir ).mkdirs();
            //            Process process = 
            //               Runtime.getRuntime().exec( "bash -c pwd", null,
            //                     null );
            
            String classpath = localizeClassPath( 
                  playerObjects.getConfig().getConsoleclasspath() );
            classpath = classpath.replace( "$aidir/", ourdir );
            
            Exec exec = new Exec( playerObjects );
            String result = "";
            try {
               result = exec.exec( "javac -classpath " + classpath
                        + " -d " + ourdir + classdir + 
                        " console" + File.separator + "ConsoleText.java", 
                        ourdir + "src-console" );
               debug( result );
            } catch( Exception e ) {
               outputTextarea.setText( "Error during compilation: " + e.getMessage() );
               return;
            }

            try {
               result = exec.exec( "jar -cf " + ourdir + jarfilename 
                        + " console", 
                        ourdir + classdir );
               debug( result );
            } catch( Exception e ) {
               outputTextarea.setText( "Error during jar creation: " + e.getMessage() );
               return;
            }

            // this should be moved to some generic class really
            URL[] locations = new URL[] { new File( ourdir + jarfilename )
            .toURI().toURL()};
            ClassLoader baseClassLoader = ConsoleJava.class.getClassLoader();
            if( baseClassLoader == null ) {
               System.out.println("using system classloader as base");
               baseClassLoader = ClassLoader.getSystemClassLoader();
            } else {
               System.out.println("using our classloader as base");         
            }
            URLClassLoader classloader = new URLClassLoader(
                  locations, baseClassLoader );
            Class<?> cls = classloader.loadClass("console.ConsoleText");
            if (!ConsoleEntryPoint.class.isAssignableFrom(cls)) {
               throw new RuntimeException("Invalid class");
            }
            Object newInstance = cls.newInstance(); 
            ConsoleEntryPoint subjar = (ConsoleEntryPoint)newInstance;
            try {
               result = subjar.go( playerObjects );
               outputTextarea.setText( result );
            } catch( Exception e ) {
               String exceptiontrace = Formatting.exceptionToStackTrace( e );
               outputTextarea.setText( exceptiontrace );               
            }
         } catch( Exception e ) {
            playerObjects.getLogFile().WriteLine( Formatting.exceptionToStackTrace( e ) );
         }
      }      
   }

   class QuitButton implements ActionListener {
      @Override
      public void actionPerformed( ActionEvent event ) {
         System.exit(0);
      }      
   }
}