/*
 # Copyright (c) 2010,2011 - RZ Uni Freiburg
 # Copyright (c) 2010,2011 - OpenSLX Project
 #
 # This program/file is free software distributed under the GPL version 2.
 # See http://openslx.org/COPYING
 #
 # If you have any feedback please consult http://openslx.org/feedback and
 # send your feedback to feedback@openslx.org
 #
 # General information about OpenSLX can be found under http://openslx.org
 #
 #
 # 	   Main class of the fbgui:
 #		- Manages display of components and their communications
 #
 */

#ifndef FBGUI_H
#define FBGUI_H

#include <QWSServer>
#include <QtGui>
#include <QtWebKit>
#include <QxtCore>

// Internal default settings
#define DEFAULT_URL "http://www.google.com"
#define DEFAULT_DOWNLOAD_DIR "/tmp/fbgui/downloads"
#define DEFAULT_CONFIG_PATH "/etc/fbgui.conf"
#define DEFAULT_UPDATE_INTERVAL 1;
#define DEFAULT_QRC_HTML_DIR ":/html"
#define DEFAULT_FILE_TRIGGER "/tmp/fbgui/trigger"

// Global settings variables
extern QString ipConfigFilePath;
extern QThread dmThread;
extern QString serialLocation;
extern QString fileToTriggerURL;
extern QString sessionID;
extern QString binPath;
extern QString downloadPath;
extern QUrl baseURL;
extern int debugMode;
extern int updateInterval;

class fbgui: public QMainWindow {
Q_OBJECT

public:
   fbgui();
   ~fbgui();

private:
   //-------------------
   //   layout setup:
   //-------------------
   // Sets the layout depending on the debug mode:
   //   no debug or debugMode = 0 -> only browser shown.
   //   debugMode = 1             -> split main window in browser and debug console.
   void setupLayout();
   // Create all actions for the GUI. (Currently only quit.)
   void createActions();
   // Create a debug console widget as QTextEdit in order to print debug messages
   // directly within the GUI. This was needed since ttys can't really be used
   // for debugging purposes in the preboot environment.
   void createDebugConsole();

   //----------------------------------------
   //   control the display of components:
   //----------------------------------------
   // watches for the file triggering the loading of the URL.
   // the file can be specified by the corresponding option.
   void watchForTrigger();
   bool checkHost() const;
   void loadURL();
   QByteArray generatePOSTData();

   //----------------------------------
   //   widgets constituing the gui:
   //----------------------------------
   // QWebView for displaying internet content
   QWebView* _webView;
   // QSplitter to split the main window in two resizable frames.
   QSplitter* _splitter;
   // QTextEdit implementing a minimalistic debug console.
   QTextEdit* _debugConsole;

   //------------------
   //   action list:
   //------------------
   // closes the main window provoking the application to quit.
   QAction* _quit;
   // triggers toggleDebugConsole()
   QAction* _toggleDebugConsole;

   // watcher to detect changes in the observed directory.
   QFileSystemWatcher* _watcher;

private slots:
   // toggles debug console when action _toggleDebugConsole happens.
   void toggleDebugConsole();

   // triggered by fileChanged Signal of _watcher
   // deletes _watcher, since we don't need it anymore and tries to load URL.
   void prepareURLLoad();

   // shut off the system
   void performShutDown();
   // reboot the system
   void performReboot();
   // prepareKexec
   void prepareKexec();
   void runKexec();
};

#endif // FBGUI_H