package com.ericsson.tic.vi;

import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Frame;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import java.util.ListIterator;
import java.io.IOException;
import java.io.File;

/**
 * The top level object which defines the GUI.
 * 
 * @author	Sami Matilainen
 * @version 1.0 (2008-12-04)
 */
public class GUI extends WindowAdapter implements ActionListener {
	
	/** The parent window of this window. (null if this is the root window) */
	public GUI parent;
	
	/** A JFrame which acts as the main window. */
	public JFrame frame;
	
	/** A file chooser dialogue. */
	//private JFileChooser fileChooser;
	
	/** The content pane. */
	private Container pane;
	
	/** Main Menu Bar. */
	private JMenuBar menuBar;
	
	/** Menu. */
	private JMenu fileMenu, settingsMenu, helpMenu;
	
	/** Menu Item. */
	private JMenuItem menuItem;
	
	/** Menu item. */
	private JCheckBoxMenuItem cbMenuItem;
	
	/** Used for layout of the main window. */
	private JSplitPane split1, split2, split3;	
	
	/** A gui component representing the console. */
	public ConsolePanel console;
	
	/** A gui component representing the toolbar. */
	private ToolbarPanel toolbar;
	
	/** A gui component representing the data list. */
	public CardPanel list;
	
	/** A gui component representing the main view. */
	private SplitViewPanel view;
	
	/** A window ID. */
	private int wid;
	
	/** If true, this one is the main Window which hosts the main console. */
	private boolean mainWindow;
	
	/**
	* Creates the main GUI window. Multiple GUI objects (windows) can be
	* present at the same time.
	*/
	public GUI() {
		
		this.wid = VI.requestWindowID();
		
		frame = new JFrame(VI.windowTitle);
		pane = frame.getContentPane();
		pane.setLayout(new BorderLayout());
		
		// create the 4 main GUI components
		// ConsolePanel
		// ToolbarPanel
		// CardPanel (settings)
		// SplitViewPanel (a hierarchy of ViewPanels in split panes)
		console = new ConsolePanel(wid);
		
		if (VI.consoleList.size() == 0) {
			this.mainWindow = true;
			VI.d = console;
		} else {
			this.mainWindow = false;
		}
		
		VI.consoleList.add(console);
		
		toolbar = new ToolbarPanel();
		list = new CardPanel();
		view = new SplitViewPanel(null, null);
		
		split3 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, toolbar, console);
		split2 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, view, split3);
		split1 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, split2, list);
		
		split2.setPreferredSize(new Dimension(3000, 3000));
		split2.setMaximumSize(new Dimension(3000, 3000));
		split2.setMinimumSize(new Dimension(400, 400));
		split1.setDividerLocation(3000);
		split1.setOneTouchExpandable(true);
		
		split2.setPreferredSize(new Dimension(3000, 3000));
		split2.setMaximumSize(new Dimension(3000, 3000));
		split2.setMinimumSize(new Dimension(400, 400));
		split2.setDividerLocation(3000);
		split2.setOneTouchExpandable(true);
		
		split3.setPreferredSize(new Dimension(50, 50));
		split3.setMaximumSize(new Dimension(120, 120));
		split3.setMinimumSize(new Dimension(50, 50));
		split3.setDividerLocation(3000);
		split3.setOneTouchExpandable(true);
		
		pane.add(split1, BorderLayout.CENTER);
		
		menuBar = new JMenuBar();
		fileMenu = new JMenu("File");
		settingsMenu = new JMenu("Settings");
		helpMenu = new JMenu("Help");
		menuBar.add(fileMenu);
		menuBar.add(settingsMenu);
		menuBar.add(helpMenu);
		
		menuItem = new JMenuItem("New Window");
		menuItem.addActionListener(this);
		menuItem.setActionCommand("new window");
		fileMenu.add(menuItem);
		
		menuItem = new JMenuItem("Close Window");
		menuItem.addActionListener(this);
		menuItem.setActionCommand("close window");
		fileMenu.add(menuItem);
		
		fileMenu.addSeparator();
		
		/*
		menuItem = new JMenuItem("Default Configuration (not implemented)");
		menuItem.addActionListener(this);
		menuItem.setActionCommand("default configuration");
		menuItem.setEnabled(false);
		fileMenu.add(menuItem);
		
		fileMenu.addSeparator();
		*/
		
		menuItem = new JMenuItem("Exit");
		menuItem.addActionListener(this);
		menuItem.setActionCommand("exit");
		fileMenu.add(menuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Advanced lighting");
		cbMenuItem.setState(VI.betterLightingOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("lighting");
		settingsMenu.add(cbMenuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Fog (globe view)");
		cbMenuItem.setState(VI.fogOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("fog");
		settingsMenu.add(cbMenuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Skybox (globe view)");
		cbMenuItem.setState(VI.skyboxOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("skybox");
		settingsMenu.add(cbMenuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Shading (bars)");
		cbMenuItem.setState(VI.barShadingOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("shading bars");
		settingsMenu.add(cbMenuItem);
		/*
		cbMenuItem = new JCheckBoxMenuItem("Shading (nodes)");
		cbMenuItem.setState(VI.nodeShadingOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("shading nodes");
		settingsMenu.add(cbMenuItem);
		*/
		cbMenuItem = new JCheckBoxMenuItem("Anti-aliasing (links)");
		cbMenuItem.setState(VI.lineAAOn);
		cbMenuItem.addActionListener(this);
		cbMenuItem.setActionCommand("aa links");
		settingsMenu.add(cbMenuItem);
		
		/*
		
		settingsMenu.addSeparator();
		
		cbMenuItem = new JCheckBoxMenuItem("Enable slaving (not implemented)");
		cbMenuItem.setState(false);
		cbMenuItem.setEnabled(false);
		settingsMenu.add(cbMenuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Enable change alerts (not implemented)");
		cbMenuItem.setState(false);
		cbMenuItem.setEnabled(false);
		settingsMenu.add(cbMenuItem);
		
		settingsMenu.addSeparator();
		
		cbMenuItem = new JCheckBoxMenuItem("Enable graceful scenario change (not implemented)");
		cbMenuItem.setState(true);
		cbMenuItem.setEnabled(false);
		settingsMenu.add(cbMenuItem);
		
		cbMenuItem = new JCheckBoxMenuItem("Force default values for scenarios (not implemented)");
		cbMenuItem.setState(false);
		cbMenuItem.setEnabled(false);
		settingsMenu.add(cbMenuItem);
		
		settingsMenu.addSeparator();
		
		menuItem = new JMenuItem("Settings...");
		menuItem.addActionListener(this);
		menuItem.setActionCommand("settings...");
		settingsMenu.add(menuItem);
		
		*/
		
		menuItem = new JMenuItem("Read Me");
		menuItem.addActionListener(this);
		menuItem.setEnabled(true);
		menuItem.setActionCommand("read me");
		helpMenu.add(menuItem);
		
		menuItem = new JMenuItem("User Manual");
		menuItem.addActionListener(this);
		menuItem.setEnabled(true);
		menuItem.setActionCommand("user manual");
		helpMenu.add(menuItem);
		
		menuItem = new JMenuItem("Shortcuts");
		menuItem.addActionListener(this);
		menuItem.setEnabled(true);
		menuItem.setActionCommand("shortcuts");
		helpMenu.add(menuItem);
		
		menuItem = new JMenuItem("API");
		menuItem.addActionListener(this);
		menuItem.setEnabled(true);
		menuItem.setActionCommand("api");
		helpMenu.add(menuItem);
		
		menuItem = new JMenuItem("Change Log");
		menuItem.addActionListener(this);
		menuItem.setEnabled(true);
		menuItem.setActionCommand("change log");
		helpMenu.add(menuItem);
		
		frame.setJMenuBar(menuBar);
		
		frame.setSize(800, 600);
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
		
		frame.addWindowListener(this);
		VI.focusInView = true;
		frame.setExtendedState(Frame.MAXIMIZED_BOTH);
		
		split1.setDividerLocation(3000);
		split2.setDividerLocation(3000);
		split3.setDividerLocation(3000);
		
		frame.setVisible(true);
		
	}
	
	/**
	 * Called when an ActionEvent is triggered.
	 * Handles a multitude of different events in the GUI.
	 *
	 * @param e The ActionEvent which triggered the event.
	 */
	public void actionPerformed(ActionEvent e) {
		
		if ("new window".equals(e.getActionCommand())) {
			
			GUI window = new GUI();
			VI.windowList.add(window);
			
		} else if ("close window".equals(e.getActionCommand())) {
			
			ListIterator iter = VI.windowList.listIterator();
			GUI win = null;
			
			while (iter.hasNext()) {
				win = (GUI)iter.next();
				if (win.wid == this.wid) {
					iter.remove();
				} else {
					
					if (mainWindow) {
						VI.d = win.console;
						this.mainWindow = false;
						win.mainWindow = true;
					}
				}
			}
			
			iter = VI.consoleList.listIterator();
			ConsolePanel con = null;
			
			while (iter.hasNext()) {
				con = (ConsolePanel)iter.next();
				if (con.wid == this.wid) {
					iter.remove();
					break;
				}
			}
			
			this.frame.dispose();
			
			if (VI.windowList.size() == 0) {
				System.exit(0);
			}
			
		} else if ("default configuration".equals(e.getActionCommand())) {
			
			// does nothing...
			
		} else if ("exit".equals(e.getActionCommand())) {
			
			System.exit(0);
			
		} else if ("settings...".equals(e.getActionCommand())) {
			
			//GlobalSettingsDialog settingsDialog = new GlobalSettingsDialog();
	
		} else if ("read me".equals(e.getActionCommand())) {
		
			// only works if the OS supports the Desktop class...
			
			try {
				java.awt.Desktop.getDesktop().open(new File("index.html"));
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		
		} else if ("user manual".equals(e.getActionCommand())) {
		
			// only works if the OS supports the Desktop class...
			
			try {
				java.awt.Desktop.getDesktop().open(new File("end_user_manual.html"));
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		
		} else if ("shortcuts".equals(e.getActionCommand())) {
		
			// only works if the OS supports the Desktop class...
			
			try {
				java.awt.Desktop.getDesktop().open(new File("keybindings.html"));
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		
		} else if ("api".equals(e.getActionCommand())) {
		
			// only works if the OS supports the Desktop class...
			
			try {
				java.awt.Desktop.getDesktop().open(new File("api.html"));
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		
		} else if ("change log".equals(e.getActionCommand())) {
		
			// only works if the OS supports the Desktop class...
			
			try {
				java.awt.Desktop.getDesktop().open(new File("changelog.html"));
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		
		} else if ("lighting".equals(e.getActionCommand())) {
			VI.betterLightingOn = !VI.betterLightingOn;
		} else if ("fog".equals(e.getActionCommand())) {
			VI.fogOn = !VI.fogOn;
		} else if ("skybox".equals(e.getActionCommand())) {
			VI.skyboxOn = !VI.skyboxOn;
		} else if ("shading bars".equals(e.getActionCommand())) {
			VI.barShadingOn = !VI.barShadingOn;
		} else if ("shading nodes".equals(e.getActionCommand())) {
			VI.nodeShadingOn = !VI.nodeShadingOn;
		} else if ("aa links".equals(e.getActionCommand())) {
			VI.lineAAOn = !VI.lineAAOn;
		}
		
	}
	
	 /**
	  * Called by the window state changed event.
	  *
	  * @param e the WindowEvent
	  */
	public void windowStateChanged(WindowEvent e) {
		
		split1.setDividerLocation(3000);
		split2.setDividerLocation(3000);
		split3.setDividerLocation(3000);
		
	}
	
	 /**
	  * Called by the window closing event.
	  *
	  * @param e the WindowEvent
	  */
	 public void windowClosing(WindowEvent e) {
		
		ListIterator iter = VI.windowList.listIterator();
		GUI win = null;
		
		while (iter.hasNext()) {
			win = (GUI)iter.next();
			if (win.wid == this.wid) {
				iter.remove();
			} else {
				
				if (mainWindow) {
					VI.d = win.console;
					this.mainWindow = false;
					win.mainWindow = true;
				}
			}
			
		}
		
		iter = VI.consoleList.listIterator();
		ConsolePanel con = null;
		
		while (iter.hasNext()) {
			con = (ConsolePanel)iter.next();
			if (con.wid == this.wid) {
				iter.remove();
				break;
			}
		}
		
		this.frame.dispose();
		
		if (VI.windowList.size() == 0) {
			System.exit(0);
		}
		
	}
	
}