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/*
 # 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