#ifndef _PROJECTION_MODEL_H_
#define _PROJECTION_MODEL_H_

#include <QGLWidget>
#include <QGLPixelBuffer>
#include <QtXml>
#include <QList>

#include "Version.h"

#include "interfaces.h"

namespace projection
{
class Scene;
class Screen;
class Channel;
class RSync;
class Exporter;
class GUIControler;



//! Default port number.
#define DEFAULT_PORT_NO 55555

//! Design mode.
enum DESIGN_MODE
{
    DESIGN_MODE_DISTORTIONMAP,  //!< Distortion map design mode.
    DESIGN_MODE_BLENDMAP        //!< Blend map design mode.
};

/**
 * Projection model class. It contains all projection settings.
 */
class ProjectionModel : public QObject
{
public:

    /**
     * Constructor.
     */
    ProjectionModel();

    /**
     * Destructor.
     */
    virtual ~ProjectionModel();

    /**
     * Initialize as a server.
     *
     * @param portNo Port number.
     */
    void initServer(int portNo=DEFAULT_PORT_NO);

    /**
     * Initialize as a client.
     *
     * @param address Client address.
     * @param portNo Port number.
     */
    void initClient(const QString& address=QString::null,
                    int portNo=DEFAULT_PORT_NO);

    /**
     * Add a new channel.
     *
     * @return New channel.
     */
    Channel* addChannel();

    /**
     * Retrieve the number of the channels.
     *
     * @return The number of the channels.
     */
    unsigned int getNumChannels() const;

    /**
     * Retrieve a channel object
     *
     * @param index Index of channel to retrieve.
     * @return Channel object.
     */
    Channel* getChannel(int index) const;

    /**
     * Retrieve Index of the specified channel.
     *
     * @param pChannel Channel object.
     * @return Index of the specified channel.
     */
    int getChannelIndex(Channel* pChannel) const;

    /**
     * Remove the specified channel.
     *
     * @param index Index of the channel to remove.
     */
    void removeChannel(int index);

    /**
     * Remove all channels.
     */
    void removeAllChannels();

    /**
     * Select a channel.
     *
     * @param pChannel Channel object to select.
     */
    void selectChannel(Channel* pChannel);

    /**
     * Retrieve the selected channel object.
     *
     * @return Selected channel object.
     */
    Channel* getSelectedChannel() const;

    /**
     * Select the previous channel.
     */
    void selectPreviousChannel();

    /**
     * Select the next channel.
     */
    void selectNextChannel();

    /**
     * Check whether any channels with the specified name is existing or not.
     *
     * @return True if a channel with the specified name is existing.
     */
    bool hasChannel(const QString& name) const;

    /**
     * Create a unique name for specified channel.
     *
     * @param name Candidate name of channel. It may not be a unique name.
     * @param pChannel Channel object to give a name.
     * @return Unique name for the specified channel.
     */
    QString getUniqueName(const QString& name, Channel* pChannel) const;

    /**
     * Create a projection area texture and retrieve its texture object index.
     *
     * @return Texture object index of the projection area texture.
     */
    GLuint getProjectorAreaTexture();

    /**
     * Create a view area texture and retrieve its texture object index.
     *
     * @return Texture object index of the view area texture.
     */
    GLuint getViewAreaTexture();

    /**
     * Set design mode.
     *
     * @param designMode Design mode.
     */
    void setDesignMode(DESIGN_MODE designMode);

    /**
     * Retrieve the current design mode.
     *
     * @param designMode Design mode.
     */
    DESIGN_MODE getDesignMode() const;

    /**
     * Block or unblock to update views.
     *
     * @param bBlock True to block updating views.
     */
    void setBlockUpdate(bool bBlock);

    /**
     * Check whether blocking or not update views.
     *
     * @return True if blocking to update views.
     */
    bool getBlockUpdate() const;

    /**
     * Redraw all views (DesignViewWindow and ProjectorWindows).
     */
    void updateViews();

    /**
     * Redraw off-screen buffer of the specified channel, then redraw all views.
     */
    void updateViewAndOffscreens();

    /**
     * Load projection settings from a file.
     *
     * @param fileName File name to load.
     * @return True if successfully loaded.
     */
    bool loadFile(const QString& fileName);

    /**
     * Save the current projection settings to a file.
     *
     * @param fileName File name to save.
     * @return True if successfully saved.
     */
    bool saveFile(const QString& fileName);

    /**
     * Restart from a new file.
     *
     * @return True if everything is ok.
     */
    bool newFile(void);

    /**
     * Restore the model from XML data.
     *
     * @param element Parent XML element of the model data.
     */
    bool initFromDOMElement(const QDomElement& element);

    /**
     * Store the current model as XML data.
     *
     * @param name XML node name of the data.
     * @param doc XML document to store the data.
     * @return Current screen data as XML data.
     */
    QDomElement domElement(const QString& name, QDomDocument& doc) const;

    /**
     * Restore projection settings from xml data.
     *
     * @param doc XML document to restore the projection settings from.
     */
    bool restoreSettings(QDomDocument& doc);

    /**
     * Store projection settings to xml data.
     *
     * @param doc XML document to store the projection settings.
     */
    void storeSettings(QDomDocument& doc);

    /**
     * Retrieve the scene object.
     *
     * @return Scene object.
     */
    Scene* getScene() const;

    /**
     * Retrieve the screen object.
     *
     * @return Screen object.
     */
    Screen* getScreen() const;

    /**
     * Retrieve the remote state synchronize object.
     *
     * @return Remote state synchronize object.
     */
    RSync* getRSync() const;

    /**
     * Retrieve the exporter object.
     *
     * @return Exporter object.
     */
    Exporter* getExporter() const;

    /**
     * Retrieve the GUI controler object.
     *
     * @return GUI controler object.
     */
    GUIControler* getGUI() const;

    /**
     * Set a GLWidget for the current render context.
     *
     * @parma pGLWidget GLWidget of the current render context.
     */
    void setRenderContext(QGLWidget* pGLWidget);

    /**
     * Set a P-Buffer for the current render context.
     *
     * @parma pPBuffer P-Buffer of the current render context.
     */
    void setRenderContext(QGLPixelBuffer* pPBuffer);

    /**
     * Activate the current render context.
     */
    void activateRenderContext();

#ifdef _DEBUG
    int m_updateViewsCount;
    int m_updateOffscreenCount;
#endif // _DEBUG

    /// Plugins
    static QList<ProjectorInterface*> projector_interfaces;
    static QList<SceneInterface*> scene_interfaces;
    static QDir pluginsDir;
    static QStringList pluginFileNames;

protected:

    Scene* m_pScene;                //!< Scene object.
    Screen* m_pScreen;              //!< Screen object.

    QList<Channel*> m_pChannels;    //!< Channel objects.
    Channel* m_pSelectedChannel;    //!< Selected channel object.

    DESIGN_MODE m_designMode;       //!< Design mode.

    bool m_bBlockUpdate;            //!< True if blocking to update views.

    RSync* m_pRSync;                //!< Remote state synchronize object.
    Exporter* m_pExporter;          //!< Exporter object.
    GUIControler* m_pGUI;           //!< GUI controler object.

    GLuint m_projectorAreaTexIndex; //!< Texture object index of the projection area texture.
    GLuint m_viewAreaTexIndex;      //!< Texture object index of the view area texture.

    QGLWidget* m_pGLWidget;         //!< GLWidget of the current render context.
    QGLPixelBuffer* m_pPBuffer;     //!< GLPixelBuffer of the current render context.

private:
    void loadPlugins();

};

}; // projection

#endif // _PROJECTION_MODEL_H_