/*
 * 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>

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

// Global settings variables
extern QString logFilePath;
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;
extern bool sslSupport;

class fbgui: public QMainWindow
{
  Q_OBJECT

public:
  fbgui();
  ~fbgui();

public slots:
  void init();

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;
  // QNetworkRequest for the Network Request
  QNetworkRequest* _qnr;
  // 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;
  QFile* _logFile;
  QTextStream* _logFileIn;

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

  // This function is triggered by fileChanged Signal of _watcher.
  // It deletes _watcher, since we don't need it anymore and tries to load URL.
  void prepareURLLoad(const QString&);
  void loadURLDone(bool success);

  //SSL Error Handler for SSL Requests
  void sslErrorHandler(QNetworkReply* reply, const QList<QSslError> & errlist);

  //Error Handler for http Requests
  void httpErrorHandler(QNetworkReply* reply);

  //Sets CaCertificate in QSslConfiguration
  void registerCACertificate(QSslCertificate& cert);

  // shut off the system
  void performShutDown();
  // reboot the system
  void performReboot();
  // shows "loading system" page
  void loadSystem();
  // prepares kexec by loading downloaded initramfs, kernel into kexec
  void prepareKexec();
  // executes: kexec -e
  void runKexec();
};

#endif // FBGUI_H