#ifndef __DEFAULT_MODEL_SCENE_CONTENT_H__
#define __DEFAULT_MODEL_SCENE_CONTENT_H__

// Includes system headers
#include <stdlib.h>
#include <GL/glut.h>

// Includes Projection Designer headers
#include <projdesigner/include/interfaces.h>

// Includes local headers
#include "glm.h"


/**
 * This class implements the contents to load a 3D scene from a OBJ file.
 *
 * A scene loaded from an OBJ file will be called a GLM scene.
 *
 */
class DefaultModelSceneContent: public SceneContent
{


public:


    /**
     * Default constructor
     *
     */
    DefaultModelSceneContent (SceneInterface* plugin);


    /**
     * Copy constructor.
     *
     * Uses copy_from() to make the copy.
     *
     */
    DefaultModelSceneContent (const DefaultModelSceneContent& data): SceneContent(data) {copy_from(data);}


    /**
     * Destructor.
     *
     */
    ~DefaultModelSceneContent ();


    /**
     * Implements the copy from other contents.
     *
     * This method is used by the copy constructor.
     *
     * @param content The source content to copy from.
     *
     * @return true if the copy is ok, false otherwise. The copy can fail if
     *         SceneContent is not a DefaultModelSceneContent.
     *
     * @seealso is_equal_to
     *
     */
    bool copy_from(const SceneContent& data);


    /**
     * Implements the egality-test with other contents.
     *
     * This could be an operator==.
     *
     * @param content The content to compare with.
     *
     * @return true if the content are equal, false otherwise. The test can
     *         fail if the contents have different parameters, but also it
     *         SceneContent is not a DefaultModelSceneContent.
     *
     * @seealso copy_from
     *
     */
    bool is_equal_to(const SceneContent& data) const;


    /**
     * Draws the GLM scene.
     *
     * @param glWidget The QGLWidget that own the OpenGL context.
     * @param cameraMatrix The camera matrix that must be use.
     *
     */
    void draw(QGLWidget* glWidget, const float* cameraMatrix);


    /**
     * Resets the GLM scene.
     *
     * This is a pure virtual method of SceneContent.
     * This one does nothing.
     *
     */
    void reset (void) {}


    /**
     * Gets the filename of the GLM scene.
     *
     * @return The filename of the GLM scene.
     *
     */
    QString fileName() const {return m_fileName;}


    /**
     * Sets the filename of the GLM scene.
     *
     * @param filename The new filename of the GLM scene.
     *
     */
    void setFileName(const QString& fileName=QString());


    /**
     * Gets the backFaceCulling flag of the GLM scene.
     *
     * @return The backFaceCulling flag of the GLM scene.
     *
     */
    bool backFaceCulling() const {return m_backFaceCulling;}


    /**
     * Sets the backFaceCulling flag of the GLM scene.
     *
     * @param bEnable The new backFaceCulling flag of the GLM scene.
     *
     */
    void setBackFaceCulling(bool bEnable) {m_backFaceCulling=bEnable;}


    /**
     * Gets the smoothing flag of the GLM scene.
     *
     * @return The smoothing flag of the GLM scene.
     *
     */
    bool smoothing() const {return m_smoothing;}


    /**
     * Sets the smoothing flag of the GLM scene.
     *
     * @param bEnable The new smoothing flag of the GLM scene.
     *
     */
    void setSmoothing(bool bEnable) {m_smoothing=bEnable;}


    /**
     * Loads the GLM scene from a QDomElement.
     *
     * Only the contents are loaded. After this, the model is loaded from the
     * filename. The model is not in the QDomElement.
     *
     * @param element The QDomElement to read from.
     *
     */
    void initFromDOMElement(const QDomElement& element);


    /**
     * Writes the contents in a QDomDocument.
     *
     * Only the contents are stored in the QDomElement. The model is not stored
     * in it.
     *
     * @param name The name of the element.
     * @param doc The document whom belongs the element.
     *
     * @return The QDomElement to add.
     *
     */
    QDomElement domElement(const QString& name, QDomDocument& doc) const;


    /**
     * Gets the name of GLM scene type, stored in g_scene_name.
     *
     * @return The name of GLM scene type, stored in g_scene_name.
     *
     */
    const QString& scene_name(void) const {return g_scene_name;}


    /// Public static const scene name for the GLM scene.
    static const QString g_scene_name;


private:


    ///File name of the model.
    QString m_fileName;


    /// True to cull back face of the model.
    bool m_backFaceCulling;


    /// True to smooth surface of the model.
    bool m_smoothing;


    /// glm model data structure.
    GLMmodel* m_pModel;


    /// gml model display list index.
    GLuint m_modelIndex;


};


#endif // __DEFAULT_MODEL_SCENE_CONTENT_H__