/**
 * @author Patrick Fries
 *
 * Mainwindow of the application. This is where the user interacts with the application
 */

package guiClasses;

import helperClasses.*;
import java.io.*;
import org.gnu.glade.*;
import org.gnu.gtk.*;
import org.gnu.glib.CustomEvents;
import wlanDriverConnectors.NICdriver;
import wlanDriverConnectors.linux_wlan_ng;
import wlanExceptions.*;

public class Mainwindow {

	// 0. Declaration of objectariables	
	private LibGlade 		gladeMainWindow;		// To browse the glade-file of the main window
	private	ConfigContainer	configContainer;		// Administates all configuration-stuff
	private Window			mainWindow;				// Refers to the main application window
	private	TreeView		foundAPTree;			// Refers to the tree of found APs
	private Label			labelStatus;			// Label to show the NIC status
	private Label			labelQualty;			// Label to show the signal quality
	private	Image			imageQualty;			// Image to show an icon as a function of the signal quality
	private Label 			labelConnAP;			// Label to show SSID and BSSID of the connected AP
	private	Label			labelEncryption;		// Label to show encryption type and key
	private Label			labelIP;				// Label to show IP and Subnet-Mask
	private Label			labelMAC;				// Label to show the MAC-Adress
	private StatusBar		statusBar;				// Refers to the statusbar at the bottom of the main window
	private NICdriver		nicDriver;				// Refers to the driver connector
	private StatusUpdater	statusUpdater;			// Instance of the local class StatusUpdater to keep statusinformations up to date
	private CustomEventAdder customEventAdder;
	private Thread			CustomEventAdderThread;	   
	
	
	// 1. Konstructor
	public Mainwindow() {
		
		// 1.1 Call libglade to browse the gladefile of the main window
		try { gladeMainWindow = new LibGlade("gui/mainwindow.glade", this); }
		catch (Exception e) { e.printStackTrace(); System.exit(-1); }
		
		// 1.2 Connect the gtk widgets with the objectvariables
		this.mainWindow = (Window)gladeMainWindow.getWidget("window_MainWindow");
		this.foundAPTree = (TreeView)gladeMainWindow.getWidget("treeview_listAP");
		this.labelQualty = (Label)gladeMainWindow.getWidget("label_currentQuality");
		this.imageQualty = (Image)gladeMainWindow.getWidget("image_signalQuality");
		this.labelStatus = (Label)gladeMainWindow.getWidget("label_currentStatus");
		this.labelConnAP = (Label)gladeMainWindow.getWidget("label_currentAP");
		this.labelEncryption = (Label)gladeMainWindow.getWidget("label_Encrypion");
		this.labelIP = (Label)gladeMainWindow.getWidget("label_currentIP");
		this.labelMAC = (Label)gladeMainWindow.getWidget("label_currentMAC");
		this.statusBar = (StatusBar)gladeMainWindow.getWidget("statusbar");
		
		// 1.3 Generate the ConfugurationContainer
		this.configContainer = new ConfigContainer();
		
		// 1.4 If drivertype is already specified then a driver connector is generated
		if ((this.configContainer.getDriver() != -1) && (!this.configContainer.getNIC().equals(""))) {
			switch (this.configContainer.getDriver()) {
			case ConfigContainer.DRIVER_LINUXWLANNG:	this.nicDriver = new linux_wlan_ng(configContainer.getNIC(), configContainer.getKnownAPs());
														break;
			default:									System.out.println("Unknown nic-driver in configurationfile!");														
			}		
		} else
			System.out.println("You do not have a driver specified!");
			
		
		
		// Generate new instance of statusupdater and run it in an own thread
		this.statusUpdater = new StatusUpdater();
		this.customEventAdder = new CustomEventAdder();
		this.CustomEventAdderThread = new Thread(this.customEventAdder);
		this.CustomEventAdderThread.start();
		//org.gnu.glib.CustomEvents.addEvent(this.statusUpdater);
		
					
	}
	
	
	// 2. Methods to response on menu-events
	
	// 2.1 Is called when "Main->Quit Application" is clicked
	public void on_quit_application_activate() {
		Gtk.mainQuit();
		System.exit(0);
	}
	
	// 2.2 Is called when "Main->Configure NIC" is clicked
	public void on_configure_nic_activate() {
		new NICConfigurationWindow(this.configContainer);
	}	
	
	
	// Local class that adds the StatusUpdater to the CustomEvents in an intervall of 5 seconds
	class CustomEventAdder implements Runnable {
		private boolean forceRefresh = false;
		public void run() {
			long nextRefresh;
			while (true) {			
				CustomEvents.addEvent(statusUpdater);
				CustomEvents.runEvents();
				nextRefresh = System.currentTimeMillis() + 5000;
				while (nextRefresh > System.currentTimeMillis()) {
					if (forceRefresh) {
						forceRefresh = false;
						break;
					}
					try { Thread.sleep(500); }
					catch (InterruptedException e) { }
				}
			}
		}
	}
	
	
	// Local class that keeps the statusinformation on the mainwindow up to date
	class StatusUpdater implements Runnable {
		
		// 1. Implementation of interface Runnable
		public void run() {
		
			// 1.0 Declaration of local variables
			boolean writeEmptyStatus = false;			// If set to true then all textboxes will be set to ""
			boolean isPresent = false;
			boolean isActivated = false;
			boolean isConnected = false;
			long	nextRefresh;						// Stores the time in ms for the next refresh 
			
			try {
			
				System.out.println("Refreshing...");
					
				// 1.0 Buffer some information from the driverconnector that is needed quite often
				if (nicDriver != null) {
					isPresent = nicDriver.isPresent();
					isActivated = nicDriver.isActivated();
					isConnected = nicDriver.isConnected();
				}
					
				// 1.1 Examine that driverconnector is configured and present
				if (nicDriver == null) {
					writeEmptyStatus=true;
					labelStatus.setText("Status of NIC (not configured!)");
				} else {
					if (!isPresent) {
						writeEmptyStatus=true;
						labelStatus.setText("Status of NIC " + configContainer.getNIC() + " (not present)");
					} else {
						if (!isActivated) {
							writeEmptyStatus=false;
							labelStatus.setText("Status of NIC " + configContainer.getNIC() + " (not activated)");
						} else {
							writeEmptyStatus=false;
							labelStatus.setText("Status of NIC " + configContainer.getNIC());
						}						
					}
				}		
				
				// 1.2 Update the connection quality
				if (writeEmptyStatus) {
					labelQualty.setText("Linkquality: not connected");
					imageQualty.set("gui/signal_offline.png");
				} else {
					if (!isConnected) {
						labelQualty.setText("Linkquality: not connected");
						imageQualty.set("gui/signal_offline.png");
					} else {
						int signalQuality = nicDriver.getSignalQuality();
						labelQualty.setText("Linkquality: " + this.signalQuality2String(signalQuality) + " (" + signalQuality + "%)");
						imageQualty.set("gui/signal_" + this.signalQuality2String(signalQuality) + ".png");
						System.out.println(signalQuality);
					}
				}
					
				// 1.3 Update the "connected AP"-label and "encryption"-label
				if (writeEmptyStatus || !isPresent || !isActivated || !isConnected) {
					labelConnAP.setText("Connected to AP:");
					labelEncryption.setText("Encryption:");
				} else {
					AccessPoint ap = nicDriver.getConnectedAP();
					labelConnAP.setText("Connected to AP: " + ap.getssid() + " (BSSID: " + ap.getbssid() + ")");
					labelEncryption.setText("Encryption: " + this.encryptionInt2String(ap.getEncryption()) + (ap.getEncryption() > AccessPoint.UNENCRYPTED ? " (Key: " + ap.getEncryptionKey() + ")": ""));
				}
					
				// 1.4 Update the labels with IP information
				if (writeEmptyStatus || !isPresent) {
					labelIP.setText("Current IP:");
					labelMAC.setText("MAC Adress:");
				} else {
					IPData ip = nicDriver.getIPData();
					labelIP.setText("Current IP: " + ip.getIP() + " (Subnet-Mask: " + ip.getSubnet() + ")");
					labelMAC.setText("MAC Adress: " + ip.getMAC());						
				}
					
				// 1.5 Redraw the mainwindow	
				mainWindow.draw();		
										
			} catch (Exception e) { new ExceptionWindow(e, ""); }
				
		}
	
		
		// Helpermethods
		
		// Method that converts the signalquality percentage to the string it belongs to
		private String signalQuality2String(int quality) {
			
			if (quality <= 10)
				return "down";
			else if (quality <= 32)
				return "minimum";
			else if (quality <= 55)
				return "marginal";
			else if (quality <= 77)
				return "good";
			else
				return "excellent";
			
		}
		
		// Method that converts the given int value for the encryption to the correspondending string
		private String encryptionInt2String(int encryptionType) {
			
			switch (encryptionType) {
			case AccessPoint.DONTKNOW:		return "unknown";
			case AccessPoint.UNENCRYPTED:	return "unencrypted";
			case AccessPoint.WEP_ENCRYPTED:	return "WEP";
			case AccessPoint.WPA_ENCRYPTED:	return "WPA";			
			}
			return "unknown";
			
		}
		
	}
	
	
	public static void main(String[] args) {
		
		Gtk.init(args);	   	
	   	Mainwindow g = new Mainwindow();
	    Gtk.main();
	   
	}
	
}