/**
 * MainTester.java
 * jCOLIBRI2 framework. 
 * @author Juan A. Recio-Garc�a.
 * GAIA - Group for Artificial Intelligence Applications
 * http://gaia.fdi.ucm.es
 * 03/07/2007
 */
package es.ucm.fdi.gaia.jcolibri.test.main;

import java.awt.BorderLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JWindow;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Layout;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.apache.log4j.WriterAppender;

import es.ucm.fdi.gaia.jcolibri.util.FileIO;

/**
 * Main tester application that executes all the examples 
 * showing also related documentation to each one. 
 * 
 * @author Juan A. Recio-Garcia
 * @version 1.0
 */
public class MainTester extends JFrame
{
    private static final long serialVersionUID = 1L;

    JList<?> list;
    List<ExampleInfo> info;
    JTabbedPane tabPane;
    JTextArea displayPane;
    JButton run;

    
    /**
     * Constructor that creates the tester using a given config file
     */
    public MainTester(String configfile)
    {
        info = parseExampleInfo(configfile);
        
        
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception e1)
        {
        }
        
        //this.setSize(new Dimension(800,600));
        this.setTitle("jCOLIBRI Tester");
//      Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
//      setBounds((screenSize.width - this.getWidth()) / 2,
//              (screenSize.height - this.getHeight()) / 2, 
//              getWidth(),
//              getHeight());
        
        JPanel panelUp = new JPanel();
        panelUp.setBorder(BorderFactory.createTitledBorder("Available Tests"));
        JPanel panelDown = new JPanel();
        panelDown.setBorder(BorderFactory.createTitledBorder("Execution log"));
        
        JPanel topLeft = new JPanel();
        topLeft.setLayout(new BorderLayout());
        
        Object[] data = new Object[info.size()];
        int i=0;
        for(ExampleInfo ei: info)
            data[i++]=ei.getName();
        list = new JList<Object>(data);
        list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list.setLayoutOrientation(JList.VERTICAL);
        JScrollPane listScroller = new JScrollPane(list);
        
        topLeft.add(listScroller, BorderLayout.CENTER);
        
        run = new JButton("Execute");
        
        run.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                runExample();
            }  
        });
        
//      mapDialog = new JDialog(this,true);
//      mapDialog.getContentPane().add(new HTMLBrowser(FileIO.findFile("es/ucm/fdi/gaia/jcolibri/test/main/map.html")));
//      mapDialog.setSize(new Dimension(800,600));
//      mapDialog.setTitle("jCOLIBRI Examples Map");
//      mapDialog.setBounds((screenSize.width - mapDialog.getWidth()) / 2,
//              (screenSize.height - mapDialog.getHeight()) / 2, 
//              mapDialog.getWidth(),
//              mapDialog.getHeight());
//      JButton map = new JButton("Map");
//      map.addActionListener(new ActionListener(){
//          public void actionPerformed(ActionEvent e)
//          {
//              mapDialog.setVisible(true);
//          }  
//      });
        
        JPanel buttonsPanel = new JPanel();
        buttonsPanel.setLayout(new BorderLayout(2,1));
        buttonsPanel.add(run,BorderLayout.CENTER);
        //buttonsPanel.add(map,BorderLayout.EAST);
        
        topLeft.add(buttonsPanel, BorderLayout.SOUTH);
        
        panelUp.setLayout(new BorderLayout());
        panelUp.add(topLeft, BorderLayout.WEST);
        
        tabPane = new JTabbedPane();
        panelUp.add(tabPane, BorderLayout.CENTER);
        

        list.addListSelectionListener(new ListSelectionListener(){

            public void valueChanged(ListSelectionEvent e) {
                    if (e.getValueIsAdjusting() == true)
                        return;
                    if (list.getSelectedIndex() == -1) 
                        return;
                    int i = list.getSelectedIndex();
                    setExample(i);
            }
        });
        
        this.addWindowListener(new WindowAdapter(){
                public void windowClosing(WindowEvent e){
                    System.exit(0);
                }
        });
        
        displayPane = new JTextArea();
        displayPane.setEditable(false);
        panelDown.setLayout(new BorderLayout());
        panelDown.add(new JScrollPane(displayPane));
        
        PrintStream aPrintStream  =
               new PrintStream(
                 new FilteredStream(
                   new ByteArrayOutputStream()));
        System.setOut(aPrintStream);
        System.setErr(aPrintStream);
        
        ConsoleAppender a = (ConsoleAppender) Logger.getRootLogger().getAllAppenders().nextElement();
        Layout l = a.getLayout();
        Logger.getRootLogger().addAppender(new WriterAppender(l,aPrintStream));
        Logger.getRootLogger().removeAppender(a);
        
        JSplitPane split = new JSplitPane(JSplitPane.VERTICAL_SPLIT,panelUp, panelDown);
        split.setDividerLocation(0.6);
        this.getContentPane().add(split);
        pack();
        setExtendedState(java.awt.Frame.MAXIMIZED_BOTH);

    }
    
    /**
     * Runs a test in a different thread.
     */
    public void runExample()
    {
        run.setEnabled(false);
        try
        {
            int i = list.getSelectedIndex();
            if(i==-1)
                return;
            
            displayPane.setText("");
            
            ExampleInfo ei = this.info.get(i);
            
            MethodRunner mr = null;
            Class<?> c = ei.getMainClass();
            Method[] methods = c.getMethods();
            for(Method m: methods)
                if(m.getName().equals("main"))
                    mr=new MethodRunner(m);
            if(mr==null)
                return;
            Thread executionThread = new Thread(mr);
            executionThread.start();
            
        } catch (Exception e)
        {
            LogManager.getLogger(this.getClass()).error(e); 
        }
    }
    
    /**
     * Thread for running a test
     * @author Juan A. Recio-Garcia
     * @version 1.0
     */
    class MethodRunner implements Runnable
    {
        Method method;
        
        MethodRunner(Method m)
        {
            method = m;
        }
        
        public void run()
        {
            Object[] args = new Object[1];
            args[0] = null;
            try
            {
                method.invoke(null, args);
            } catch (Exception e)
            {
                LogManager.getLogger(this.getClass()).error(e);
                e.printStackTrace();
            }
            LogManager.getLogger(MainTester.class).info("Test execution finished");
            run.setEnabled(true);
        }
    }
    
    /**
     * Shows an example in the window.
     */
    public void setExample(int i)
    {
        try
        {
            ExampleInfo ei = this.info.get(i);
            tabPane.removeAll();
            
            JEditorPane ep = new JEditorPane();
            ep.setContentType("text/html");
            ep.setText("<font face=\"verdana, arial, helvetica\"><b>"+ei.getDescription()+"</b></font>");
            ep.setEditable(false);
            tabPane.add("Description", new JScrollPane(ep));
            
            ep = new JEditorPane(ei.getSource());
            ep.setContentType("text/html");
            ep.setEditable(false);
            tabPane.add("Source", new JScrollPane(ep));
            
            for(URL url: ei.getDoc())
            {
                int b = url.getFile().lastIndexOf('/')+1;
                int e = url.getFile().lastIndexOf(".html");
                String name = url.getFile().substring(b,e);
                if(name.equals("package-summary"))
                {
                    String aux = url.getFile().substring(0,b-1);
                    int x = aux.lastIndexOf('/')+1;
                    name = aux.substring(x);
                }
                tabPane.add("[Doc]"+name, new HTMLBrowser(url));
            }
        } catch (IOException e)
        {
            LogManager.getLogger(this.getClass()).error(e.getLocalizedMessage());
        }
    }
    
    /**
     * Main method
     */
    public static void main(String[] args)
    {
        MainTester main = new MainTester("es/ucm/fdi/gaia/jcolibri/test/main/examples.config");
        main.setVisible(true);
        main.new LogoFrame(es.ucm.fdi.gaia.jcolibri.util.FileIO.findFile("/es/ucm/fdi/gaia/jcolibri/test/main/colibri-cycle-title.png"),2000);

    }

    /**
     * Parses the information in the config file
     */
    public List<ExampleInfo> parseExampleInfo(String file)
    {
        ArrayList<ExampleInfo> info = new ArrayList<ExampleInfo>();

        try
        {
            BufferedReader br = null;
            br = new BufferedReader( new InputStreamReader(FileIO.findFile(file).openStream()));
            //if (br == null)
            //  throw new Exception("Error opening file: " + file);
            String line = "";
            ExampleInfo ei;
            while ((line = br.readLine()) != null) {
                ei = new ExampleInfo();
                ei.setName(line);
                ei.setDescription(br.readLine());
                ei.setMainClass(Class.forName(br.readLine()));
                ei.setSource(FileIO.findFile(br.readLine()));
                while(!(line= br.readLine()).equals("<example>"))
                    ei.addDoc(FileIO.findFile(line));
                info.add(ei);
            }
            br.close();
        } catch (Exception e)
        {
            LogManager.getLogger(this.getClass()).error(e);
        }
        return info;
    }

    /**
     * Bean that stores the information in the config file.
     * @author Juan A. Recio-Garcia
     * @version 1.0
     *
     */
    class ExampleInfo
    {
        String name;
        String description;
        Collection<URL> doc;
        URL source;
        Class<?> mainClass;
        
        public ExampleInfo()
        {
            doc = new ArrayList<URL>();
        }
        public ExampleInfo(String name, String description, Collection<URL> doc)
        {
            super();
            this.name = name;
            this.description = description;
            this.doc = doc;
        }

        
        
        /**
         * @return Returns the mainClass.
         */
        public Class<?> getMainClass()
        {
            return mainClass;
        }
        /**
         * @param mainClass The mainClass to set.
         */
        public void setMainClass(Class<?> mainClass)
        {
            this.mainClass = mainClass;
        }
        /**
         * @return Returns the source.
         */
        public URL getSource()
        {
            return source;
        }
        /**
         * @param source The source to set.
         */
        public void setSource(URL source)
        {
            this.source = source;
        }
        /**
         * @return Returns the description.
         */
        public String getDescription()
        {
            return description;
        }

        /**
         * @param description The description to set.
         */
        public void setDescription(String description)
        {
            this.description = description;
        }

        /**
         * @return Returns the doc.
         */
        public Collection<URL> getDoc()
        {
            return doc;
        }

        /**
         * @param doc The doc to set.
         */
        public void setDoc(Collection<URL> doc)
        {
            this.doc = doc;
        }
        
        public void addDoc(URL url)
        {
            this.doc.add(url);
        }

        /**
         * @return Returns the name.
         */
        public String getName()
        {
            return name;
        }

        /**
         * @param name The name to set.
         */
        public void setName(String name)
        {
            this.name = name;
        }
        
        
    }
    
    /**
     * A HTML browser panel
     * @author Juan A. Recio-Garcia
     * @version 1.0
     *
     */
    class HTMLBrowser extends JPanel
    {
        private static final long serialVersionUID = 1L;

        JEditorPane doc;
        URL originalURL;
        
        public HTMLBrowser(URL file)
        {
            originalURL = file;
            JPanel top = new JPanel();
            top.setLayout(new BoxLayout(top,BoxLayout.X_AXIS));
            
            JButton prev = new JButton("Back");
            prev.addActionListener(new ActionListener(){

                public void actionPerformed(ActionEvent e)
                {
                    try
                    {
                        doc.setPage(originalURL);
                    } catch (IOException e1)
                    {
                        LogManager.getLogger(this.getClass()).error(e1);
                    }  
                }
            });
         
            JLabel urlInfo = new JLabel(file.toString());
            
            top.add(prev);
            top.add(Box.createHorizontalGlue());
            top.add(urlInfo);
            
            doc = new JEditorPane();
            doc.setContentType("text/html");
            doc.setEditable(false);
            doc.addHyperlinkListener(new HyperlinkListener() {

                public void hyperlinkUpdate(HyperlinkEvent e)
                {
                    try
                    {
                        if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED))
                            doc.setPage(e.getURL());

                    } catch (IOException e1)
                    {
                        LogManager.getLogger(this.getClass()).error(e1);
                    }
                }

            });
            try
            {
                doc.setPage(file);
            } catch (IOException e)
            {
                LogManager.getLogger(this.getClass()).error(e);
                LogManager.getLogger(this.getClass()).error(file);
                
            }
            
            this.setLayout(new BorderLayout());
            this.add(top, BorderLayout.NORTH);
            this.add(new JScrollPane(doc), BorderLayout.CENTER);
        }

    }

    /**
     * This class redirects System.out to the log text area.
     * @author Juan A. Recio-Garcia
     * @version 1.0
     */
    class FilteredStream extends FilterOutputStream {
        public FilteredStream(OutputStream aStream) {
            super(aStream);
          }

        public void write(byte b[]) throws IOException {
            String aString = new String(b);
            displayPane.append(aString);
            displayPane.setCaretPosition( displayPane.getDocument().getLength() );
        }

        public void write(byte b[], int off, int len) throws IOException {
            String aString = new String(b , off , len);
            displayPane.append(aString);
            displayPane.setCaretPosition( displayPane.getDocument().getLength() );
        }
    }
    
    /**
     * Shows the logo screen
     * @author Juan A. Recio-Garcia
     * @version 1.0
     *
     */
    public class LogoFrame extends JWindow implements Runnable {
        private static final long serialVersionUID = 1L;

        long time;
        public LogoFrame(URL image, long time) throws HeadlessException {
                try {
                    
                        this.time = time;
                        JLabel jLabel1 = new JLabel();
                        jLabel1.setIcon(new javax.swing.ImageIcon(image));
                        jLabel1.setBorder(BorderFactory.createRaisedBevelBorder());
                        this.getContentPane().add(jLabel1, BorderLayout.CENTER);
                        this.pack();

                        java.awt.Dimension screenSize = java.awt.Toolkit
                                        .getDefaultToolkit().getScreenSize();
                        setBounds((screenSize.width - this.getWidth()) / 2,
                                        (screenSize.height - this.getHeight()) / 2, getWidth(),
                                        getHeight());

                        this.setVisible(true);
                        Thread thread = new Thread(this);
                        thread.start();
                } catch (Exception e) {
                        e.printStackTrace();
                }
        }

        public void run()
        {
            try
            {
                Thread.sleep(2000);
            } catch (InterruptedException e)
            {
                LogManager.getLogger(this.getClass()).error(e);
                
            }
            this.dispose();
        }
    }
}