package junotu;

import java.lang.RuntimeException;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
import javax.swing.event.DocumentListener;
import javax.swing.event.DocumentEvent;

import javax.swing.JPanel;
import javax.swing.Box;

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JScrollPane;
import javax.swing.JScrollBar;
import javax.swing.JPopupMenu;
import javax.swing.JMenuItem;

import junotu.Main;
import junotu.Window.Tab;
import junotu.Window.TabInterface;
import junotu.Card;
import junotu.CardWidget;

public class TabSimpleSearch extends JPanel implements ActionListener, TabInterface {

    public boolean dirty;
    
    private final String KEY_ACTION_COMMIT = "commit";
    
    private JTextField field;
    private JButton create;
    private JButton context;
    private JPopupMenu menu;
    private Box results;
    private JScrollPane scroll;

    private JMenuItem menu_calendar;
    
    public TabSimpleSearch()
    {
	dirty = true;
	
	this.setLayout( new BorderLayout() );

	JPanel top = new JPanel( new BorderLayout() );
	Box buttonBox = Box.createHorizontalBox();
	context = new JButton("=");
	create = new JButton("+");
	field = new JTextField();
	results = Box.createVerticalBox();
	scroll = new JScrollPane( results );

	menu = new JPopupMenu("Menu");
	menu_calendar = menu.add("Calendar board");
	
	context.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
	create.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
	field.setFont( new Font( "Monospaced", Font.PLAIN, 16 ) );

	scroll.getVerticalScrollBar().setUnitIncrement(128);

	field.setPreferredSize( new Dimension(32, 32) );
	
	this.add( top, BorderLayout.NORTH );
	top.add( field, BorderLayout.CENTER );
	top.add( buttonBox, BorderLayout.EAST );
	buttonBox.add( context );
	buttonBox.add( create );

	this.add( scroll, BorderLayout.CENTER );

	scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

	create.addActionListener(this);
	context.addActionListener(this);
	menu_calendar.addActionListener(this);

	field.getDocument().addDocumentListener(
						new DocumentListener()
						{
						    @Override
						    public void changedUpdate( DocumentEvent e )
						    {
							updateTitle();
							search();
						    }
						    @Override
						    public void removeUpdate( DocumentEvent e )
						    {
							updateTitle();
							search();
						    }
						    @Override
						    public void insertUpdate( DocumentEvent e )
						    {
							updateTitle();
							search();
						    }
						}
						);

	registerKeyboardAction( this, KEY_ACTION_COMMIT, KeyStroke.getKeyStroke( KeyEvent.VK_S, InputEvent.CTRL_DOWN_MASK ), WHEN_IN_FOCUSED_WINDOW );

	field.setToolTipText("Search query.");
	create.setToolTipText("Create new card. Shift-click to open it in a new window.");
	context.setToolTipText("Bring up a menu with more actions.");
	menu_calendar.setToolTipText("Open calendar board.");
	
    }

    private void search() {

	if( !javax.swing.SwingUtilities.isEventDispatchThread() ) {
	    SwingUtilities.invokeLater(
				       new Runnable()
				       {
					   public void run()
					   {
					       search();
					   }
				       }
				       );
	    return;
	}
	
	Card[] cards;

	String text = field.getText();
	if( text.length() > 0 ) {
	    cards = Main.database.searchSimple( field.getText() );
	} else {
	    cards = Main.database.searchTopRecent( 32 );
	}

	System.out.print("Search: Found "+cards.length+" matches.\n");
	
	/* TODO: Reuse widgets. */
	results.removeAll();
	for( Card card : cards ) {
	    CardWidget cardWidget = new CardWidget( card );
	    results.add( cardWidget );
	}
	results.validate();
	results.repaint();

	/* Otherwise scrollup doesn't work. Perhaps because GUI needs to redraw first? */
	SwingUtilities.invokeLater(
				   new Runnable()
				   {
				       public void run()
				       {
					   scrollTop();
				       }
				   }
				   );
    }

    public void refreshSearch()
    {
	search();
	dirty = false;
    }

    private void scrollTop()
    {
	JScrollBar scrollbar = scroll.getVerticalScrollBar();
	scrollbar.setValue(0);
    }
    
    private void updateTitle()
    {
	Window window = (Window)this.getTopLevelAncestor();

	String text = field.getText();

	if( text.length() > 0 ) {
	    window.setTitle( window.preferredTitle( "Search: "+text ) );
	} else {
	    window.setTitle( window.preferredTitle( "Search" ) );
	}
	
    }
    
    private void buttonClickedCreate( boolean newWindow )
    {
	if( newWindow ) {
	    Main.actionCardCreate( Main.windowAdd( Tab.EDIT ) );
	} else {
	    Window window = (Window)this.getTopLevelAncestor();
	    Main.actionCardCreate( window );
	}
    }

    public void actionPerformed( ActionEvent e )
    {
	Object source = e.getSource();
	if( source == this ) {
	    switch( e.getActionCommand() ){

	    case KEY_ACTION_COMMIT: {
		Main.database.databaseCommit();
		break;
	    }

	    }
	} else if( source == create ) {
	    boolean newWindow = (e.getModifiers() & ActionEvent.SHIFT_MASK) != 0;
	    buttonClickedCreate( newWindow );
	} else if( source == context ) {
	    menu.show( (Component)source, 0, 0 );
	} else if( source == menu_calendar ) {
	    Window window = (Window)this.getTopLevelAncestor();
	    window.tabSwitch( Tab.CALENDAR_BOARD );
	}
    }

    public void onSwitchedTo()  {
	if( dirty ) {
	    refreshSearch();
	    dirty = false;
	}
    }
    
}