/**
* @headerfile travisto.h
* @author   Ulrich Kemloh <kemlohulrich@gmail.com>
* @version 0.1
* Copyright (C) <2009-2010>
*
* @section LICENSE
* This file is part of OpenPedSim.
*
* OpenPedSim is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* OpenPedSim is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenPedSim. If not, see <http://www.gnu.org/licenses/>.
*
* @section DESCRIPTION
*
* \brief main program class
*
*
*
*  Created on: 11.05.2009
*
*/

#ifndef TRAVISTO_H
#define TRAVISTO_H


#include "ui_mainwindow.h"
#include <QMainWindow>
#include <QSettings>
#include <QSplitter>
#include <QTreeView>
#include <QStandardItem>
#include <QTreeWidget>

#include <vector>

class vtkWindowToImageFilter;
class SyncData;
class ThreadDataTransfer;
class ThreadVisualisation;
class QString;
class QDomNode;
class FacilityGeometry;
class GeometryFactory;
class Building;
class Message;
class Settings;


extern int extern_update_step;
extern int extern_screen_contrast;
extern bool extern_is_pause;
extern bool extern_launch_recording;
extern bool extern_recording_enable;
extern bool extern_offline_mode;
extern bool extern_shutdown_visual_thread;
extern bool extern_fullscreen_enable;

extern bool extern_pedestrians_firstSet_visible;

extern SyncData extern_trajectories_firstSet;

//states if the datasets are loaded.
extern bool extern_first_dataset_loaded;

//states whether the loaded datasets are visible
extern bool extern_first_dataset_visible;


class MainWindow : public QMainWindow {
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
    virtual ~MainWindow();


public Q_SLOTS:

    /// display the help modus
    void slotHelpAbout();
    ///quit the program
    void slotExit();

    /// load a file
    bool slotLoadFile();

    /// output an Error
    void slotErrorOutput(QString err);

    /// output a warning
    //void slotWarningOutput(QString warning);

    /// start the visualisation thread
    /// the signal is emitted when the
    /// data transfer thread the header and at least one data set
    void slotStartVisualisationThread(QString data="",int numberOfAgents=1000,float frameRate=25);

    /// shutdown the visualisation thread
    void slotShutdownVisualisationThread(bool);

    /// add a new dataset to the store.
    /// note that at most three (3) datasets can be loaded for a visualisation round
    bool slotAddDataSet();

    /// clear all previously added/loaded datasets
    void slotClearAllDataset();

    /// set the camera view angle to  TOP/FRONT/SIDE
    // TODO: high priority
    void slotSetCameraPerspectiveToTop();
    void slotSetCameraPerspectiveToFront();
    void slotSetCameraPerspectiveToSide();
    void slotSetCameraPerspectiveToVirtualAgent();

    //controls visualisation
    void slotStartPlaying();
    void slotStopPlaying();
    void slotRecord();
    void slotFullScreen(bool status);
    void slotReset();
    void slotNetworkSettings();
    // void slotToggleVisualisationMode();
    void slotSetOfflineMode(bool status);
    void slotSetOnlineMode(bool status);
    /// take a screenshot of the rendering window
    void slotTakeScreenShot();

    /// update the status message
    void slotCurrentAction(QString msg);
    void slotFrameNumber(unsigned long timems);
    void slotRunningTime(unsigned long timems);
    void slotRenderingTime(int fps);
    void slotControlSequence(const char *);

    /// load a geometry file and display it
    //void slotLoadGeometry( );
    void slotClearGeometry();
    //void slotLoadParseShowGeometry(QString fileName);

    /// load a geometry sent by the data transfer thread
    //void slotLoadGeometryToThread(QString data);


    /// enable/disable the first pedestrian group
    void slotToggleFirstPedestrianGroup();


    /// show/hides trajectories (leaving a trail) only
    void slotShowTrajectoryOnly();

    /// shows/hide geometry
    void slotShowGeometry();
    /// shows/hide geometry
    void slotShowHideExits();
    /// shows/hide geometry
    void slotShowHideWalls();
    /// shows/hide navigation lines
    void slotShowHideNavLines();
    /// shows/hide navigation lines
    void slotShowHideFloor();
    /// shows/hide geometry captions
    void slotShowHideGeometryCaptions();
    /// show hide the obstacles
    void slotShowHideObstacles();
    /// show/hide the gradient field
    void slotShowHideGradientField();

    /// show pedestrians only without trail
    void slotShowPedestrianOnly();

    /// update the playing speed
    void slotUpdateSpeedSlider(int newValue);

    /// update the position slider
    void slotUpdateFrameSlider(int newValue);
    void slotFrameSliderPressed();
    void slotFrameSliderReleased();

    /// handle the frame by frame navigation
    void slotFramesByFramesNavigation();
    void slotNextFrame();
    void slotPreviousFrame();

    /// enable/disable the pedestrian captions
    void slotShowPedestrianCaption();

    /// update the contrast
    void slotUpdateContrastSlider(int newValue);

    /// set visualisation mode to 2D
    void slotToogle2D();

    /// set visualisation mode to 3D
    void slotToogle3D();

    /// show / hide the legend
    void slotToogleShowLegend();

    void slotToogleShowAxis();

    /// change, choose the pedestrian shape
    void slotChangePedestrianShape();

    /// start/stop the recording process als png images sequences
    void slotRecordPNGsequence();

    /// render a PNG image sequence to an AVI video
    void slotRenderPNG2AVI();

    /// adjust the scene background color
    void slotChangeBackgroundColor();

    /// change the pedestrian caption mode to automatic
    void slotCaptionColorAuto();

    /// change he pedestrian caption color to manual
    void slotCaptionColorCustom();

    /// change the wall color
    void slotChangeWallsColor();

    /// change the exits color
    void slotChangeExitsColor();

    /// change the navigation lines color
    void slotChangeNavLinesColor();

    /// change the floor color
    void slotChangeFloorColor();

    /// change the obstacle color
    void slotChangeObstacleColor();

    /// show/hide onscreen information
    /// information include Time and number pedestrians left in the facility
    void slotShowOnScreenInfos();

    ///show the detailed structure of the geometry
    void slotShowGeometryStructure();

    void slotOnGeometryItemChanged(QStandardItem *item);

private:
Q_SIGNALS:
    void signal_controlSequence(QString);

protected:
    virtual void closeEvent(QCloseEvent* event);
    void dragEnterEvent(QDragEnterEvent *event);
    void dropEvent(QDropEvent *event);

private:

    /// load settings in the case the remember settings is checked.
    void loadAllSettings();

    /// save all system settings
    void saveAllSettings();

    /// performs the necessary cleaning before shutting down the program.
    void cleanUp();

    /// reset the system to the very initial state
    //void reset();

    /// get the value of the tag <tagName> from a QDomNode
    QString getTagValueFromElement(QDomNode node, const char * tagName);

    /// parse the geometry  Node and return a pointer to geometry object
    /// used in online mode only
    void parseGeometry(const QDomNode& geoNode);
    void parseGeometry(const QString &geometryString);

    /**
     * parse a shape node and get the initials heights and colors of pedestrians.
     *
     * @param shapeNode The node to be parsed
     * @param groupID 1, 2 or 3
     * @return true if success
     */
     //  bool parsePedestrianShapes(QDomNode shapeNode, int groupID);

    /// reset all graphic element to their initial(default) state
    void resetGraphicalElements();

    /// add a second/third dataset to the visualization data
    ///  groupID may be 2 or 3
    /// @return false if something went wrong.

    bool addPedestrianGroup(int groupID, QString fileName="");

    ///return true if at least one dataset was loaded
    bool anyDatasetLoaded();

    /// clear the corresponding dataset if it exists
    void clearDataSet(int ID);

    /// reset all dataset, to the beginning
    void resetAllFrameCursor();

    /// wait for visualisation thread to terminate
    void waitForVisioThread();

    /// wait for data transfer thread to terminate
    void waitForDataThread();



private:
    Ui::mainwindow ui;

    bool isPlaying;
    bool isPaused;
    bool frameSliderHold;
    int numberOfDatasetLoaded;

    Settings* travistoOptions;
    ThreadDataTransfer* dataTransferThread;
    ThreadVisualisation* _visualisationThread;
    QLabel *labelCurrentAction;
    QLabel *labelFrameNumber;
    QLabel *labelRecording;
    QLabel *labelMode;
    QSplitter _splitter;
    //QTreeWidget _geoStructure;
    QTreeView _geoStructure;

};

#endif // TRAVISTO_H