package vishnu.testvis.visual;
import vishnu.testvis.treemap.visual.TMNavigator;
import vishnu.testvis.sammon.*;
import vishnu.testvis.object.*;
import vishnu.testvis.evaluate.*;
import vishnu.testvis.dendro.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.beans.*;
import javax.swing.event.*;
import java.io.*;
import java.util.Vector;
import java.util.Properties;
import java.applet.*;
import java.net.*;
import vishnu.datablock.*;

public class Vishnu extends JApplet
{
    public JTabbedPane theTabbedPane = null;
    public PlainPanel plainPanel = null;
    public GraphicalPane sammonPanel = null;
    public RadVizPanel radVizPanel = null;
    public DendroPanel dendroPanel = null;
    public JButton findButton = null;
    
    public DataManager dataManager = null;
    
    public Logging log = null;
    public Queries queries = null;
    public boolean searchStarted = false;
    public boolean firstSearch = true;
    public boolean refine = false;
    
    public JTextField searchBox = null;
    public JComboBox collCombo = null;
    protected int largeFont = 16;
    
    public String query = null;
    public String coll = null;

    public String server_address = null;
    
    protected Dimension size = null;
        
    public void init()
    {
	query = getParameter("query");
        coll = getParameter("collection");
	String library = getParameter("library");
	String viscgi = getParameter("viscgi");
	if (library == null ) {
	    System.err.println("Error: library parameter is null!!");
	    // what should we do?
	    return;
	}
	
	server_address = library;
	if (viscgi != null) {
	    // if viscgi parameter is set (even if empty) we assume that
	    // the server is running  cgi-like with arguments in the url
	    server_address += viscgi;
	    server_address = tidy_URL(server_address, true);
	} else {
	    server_address = tidy_URL(server_address, false);
	}
	
	String w = getParameter("width");
	String h = getParameter("height");
	
	if( (w != null) && (h != null) )
	    size = new Dimension(Integer.parseInt(w),Integer.parseInt(h));
        else size = new Dimension(1000,800);
	
	dataManager = new DataManager(this);
	
        this.setSize(size); 
        
	theTabbedPane = new JTabbedPane();

	radVizPanel = new RadVizPanel(this);
        radVizPanel.setName("RadialVis");
        
        plainPanel = new PlainPanel(this);
        plainPanel.setName("PlainVis");
        
        sammonPanel = new GraphicalPane(this);
        sammonPanel.setName("SammonVis");
        
        dendroPanel = new DendroPanel(this);
        dendroPanel.setName("DendroVis");
	
	findButton = new JButton();
        try {
	    jbInit();
	} catch(Exception e){e.printStackTrace();}
	
	initCollections();
	
	if( query != null && !query.equals("null") ){
	    searchBox.setText(query);
	    findQuery();
	}
    }

    protected void initCollections() {

	Collection current_collection=null;
	if( coll == null || coll.equals("") || coll.equals("null") ) {
	    current_collection = ((Collection)dataManager.collections.elementAt(0));
	    coll = current_collection.dir;
	} else {
	    for( int i = 0; i < dataManager.collections.size(); i++ ){
		Collection c = (Collection)dataManager.collections.elementAt(i);
		if( c.dir.equals(coll) ){
		    current_collection = c;
		    break;
		}
	    }
	}
	if (current_collection == null) {
	    // could still be null if we specified an invalid collection in the parameters
	    current_collection = ((Collection)dataManager.collections.elementAt(0));
	    coll = current_collection.dir;
	}
	
	dataManager.currentCollection = current_collection;
	dataManager.requestCollection();
	System.out.println("Requesting collection " + current_collection.name);
	collCombo.setSelectedItem(current_collection);
    }

    protected void jbInit() throws Exception
    {
	JPanel pane = new JPanel();
	setContentPane(pane);
	pane.setBorder(BorderFactory.createLineBorder(Color.black, 2));
        pane.setLayout(new BorderLayout());
        
	JPanel searchPanel = new JPanel();
	searchPanel.setLayout(new BorderLayout(5,5));
	searchPanel.setBackground(SystemColor.control);
        searchBox = new JTextField();
	searchBox.setPreferredSize(new Dimension((int)(size.width/5), 26));
        searchBox.setEditable(true);
        searchBox.addKeyListener(new java.awt.event.KeyAdapter(){
                public void keyPressed(KeyEvent e)
                {
                    findButton_keyPressed(e);
                }
            });
	
	JLabel searchLabel = new JLabel();
        searchLabel.setFont(new java.awt.Font("Monospaced", 0, largeFont));
        searchLabel.setForeground(Color.black);
        searchLabel.setText("Search:");

	searchPanel.add(searchLabel, BorderLayout.WEST);
	searchPanel.add(searchBox, BorderLayout.CENTER);

	JPanel collPanel = new JPanel();
	collPanel.setLayout(new BorderLayout(5,5));
	collPanel.setBackground(SystemColor.control);

	collCombo = new JComboBox(dataManager.collections);
	collCombo.setEditable(false);
	collCombo.addItemListener(new java.awt.event.ItemListener() {
		public void itemStateChanged(ItemEvent i) {
		    if (i.getStateChange()==ItemEvent.SELECTED){
			dataManager.currentCollection = (Collection)i.getItem();
			collCombo.hidePopup();
			coll = dataManager.currentCollection.dir;
			dataManager.requestCollection();
			update();
			
		    }
		    
		}
		});
	collCombo.setRenderer(new javax.swing.DefaultListCellRenderer() {
		public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus)
		{
		    setText(((Collection)value).name);
		    setFont(list.getFont());
		    return this;
		}
	    });


	JLabel collLabel = new JLabel();           
	collLabel.setFont(new java.awt.Font("Monospaced", 0, largeFont));
        collLabel.setForeground(Color.black); 
        collLabel.setText("Collection:");
	
	collPanel.add(collLabel, BorderLayout.WEST);
	collPanel.add(collCombo, BorderLayout.CENTER);

	JPanel topPanel = new JPanel();
        topPanel.setLayout(new BorderLayout(10,10));
	topPanel.setBackground(SystemColor.control);
        topPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
	
	JPanel backPanel = new JPanel();   
        backPanel.setPreferredSize(new Dimension(size.width,size.height));
        backPanel.setBackground(SystemColor.control);
        backPanel.setLayout(new BorderLayout());
        
	theTabbedPane.setBackground(SystemColor.control);
        theTabbedPane.setFont(new java.awt.Font("Monospaced", Font.BOLD, largeFont));
        theTabbedPane.addChangeListener(new javax.swing.event.ChangeListener(){
		public void stateChanged(ChangeEvent e)
		{
		    theTabbedPane_stateChanged(e);
		}
	    });
	
        findButton.setBackground(SystemColor.control);
        findButton.setFont(new java.awt.Font("Monospaced", 0, largeFont));
        findButton.setBorder(BorderFactory.createEtchedBorder());
        findButton.setText("Find");
        findButton.addKeyListener(new java.awt.event.KeyAdapter(){
		public void keyPressed(KeyEvent e)
		{
		    findButton_keyPressed(e);
		}
	    });
        
        findButton.addMouseListener(new java.awt.event.MouseAdapter(){
		public void mouseClicked(MouseEvent e)
		{
		    findButton_mouseClicked(e);
		}
	    });
	
        pane.add(backPanel, BorderLayout.CENTER);
        backPanel.add(theTabbedPane, BorderLayout.CENTER);
	
        theTabbedPane.add(plainPanel, "PlainVis");
        theTabbedPane.add(radVizPanel, "RadialVis");
        theTabbedPane.add(sammonPanel,"SammonVis");
        theTabbedPane.add(dendroPanel,"DendroVis");
        theTabbedPane.setForegroundAt(0,Color.blue);
	
        pane.add(topPanel, BorderLayout.NORTH);
	
	topPanel.add(collPanel, BorderLayout.WEST);
	topPanel.add(searchPanel, BorderLayout.CENTER);
	topPanel.add(findButton, BorderLayout.EAST);
	
        theTabbedPane.setPreferredSize(size);

    }
    
    
    public void update()
    {
	plainPanel.update();
        radVizPanel.update();
        dendroPanel.update();        
        sammonPanel.update();
    }
    
        
    void findQuery()
    {
	refine = false;
	
        int docCount;
	String text = null;
	
	text = (String)searchBox.getText();
	if(text.trim().length() < 1) return;
	query = text.trim();
	
        setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
	
	int count = 1;
	String q = query;
	docCount = dataManager.query(q);
	if (docCount == 0 ) {
      	    JOptionPane.showMessageDialog(this,"No documents found related to " + text);
	    setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	    return;
	}

        setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    }
    

    void theTabbedPane_stateChanged(ChangeEvent e)
    {
	for( int i = 0; i < theTabbedPane.getTabCount(); i++ )
        {
            theTabbedPane.setForegroundAt(i,Color.black);
        }
        
        int tab = theTabbedPane.getSelectedIndex();
        
        theTabbedPane.setForegroundAt(tab,Color.blue);
    }


  void findButton_keyPressed(KeyEvent e)
  {
      int key = e.getKeyCode();
      if (key==10)
	  {
	      findButton.setSelected(true);
	      findQuery();
	      findButton.setSelected(false);
	  }
  }
    
    void findButton_mouseClicked(MouseEvent e)
    {
	findQuery();
    }
    
   
    // Tidy up URLs
    //
    // Ensure a URL address (as string) has a protocol, host, and file.
    //
    // If the URL is a CGI script URL, it should be tidied up so that it is
    // appropriate to tage attrib=value pairs on the end.  This means it
    // must either end with a "?" or (if it contains a question-mark
    // internally) end with a "&".
    // taken from Phind.java, Greenstone digital library.
    String tidy_URL(String address, boolean isCGI) {

	// System.err.println("tidy URL: " + address);
	
	// make sure the URL has protocol, host, and file
	if (address.startsWith("http")) {
	    // the address has all the necessary components
	} else if (address.startsWith("/")) {
	    // there is not protocol and host
	    URL document = getDocumentBase();
	    String port = "";
	    if (document.getPort()!=-1) {
		port = ":" + document.getPort();
	    }
	    address = "http://" + document.getHost() + port  + address;
	} else {
	    // this URL is relative to the directory the document is in
	    URL document = getDocumentBase();
	    String directory = document.getFile();
	    int end = directory.lastIndexOf('/');
	    String port = "";
	    if (document.getPort()!=-1) {
		port = ":" + document.getPort();
	    }
	    directory = directory.substring(0,end + 1);
	    address = "http://" + document.getHost() + port + directory + address;
	    
	}
	
	// if the URL is a cgi script, make sure it has a "?" in ti,
	// and that it ends with a "?" or "&"
	if (isCGI) {
	    if (address.indexOf((int) '?') == -1) { 
		address = address + "?";
	    } else if (!address.endsWith("?")) {
		address = address + "&";
	    }
	}

	return address;
    }

}