#ifndef __DEFAULT_CUBEMAP_SCENE_CONTENT_H__
#define __DEFAULT_CUBEMAP_SCENE_CONTENT_H__


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

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

// Some defines, first...
#define SIZE 1.0f
#define TEXCOORD_MIN 0.001f
#define TEXCOORD_MAX 0.999f

//! Cube map faces.
enum CUBEMAP_FACE
{
    CUBEMAP_FACE_FRONT=0,   //!< Front face.
    CUBEMAP_FACE_BACK,      //!< Back face.
    CUBEMAP_FACE_LEFT,      //!< Left face.
    CUBEMAP_FACE_RIGHT,     //!< Right face.
    CUBEMAP_FACE_TOP,       //!< Top face.
    CUBEMAP_FACE_BOTTOM     //!< Bottom face.
};


/**
 * Implementation of the class.
 *
 * The purpose of the cubemap scene is to create a environment using images all
 * around the scene.
 *
 */
class DefaultCubemapSceneContent: public SceneContent
{

public:


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


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


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


    /**
     * 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 DefaultCubemapSceneContent.
     *
     * @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 DefaultCubemapSceneContent.
     *
     * @seealso copy_from
     *
     */
    bool is_equal_to(const SceneContent& data) const;


    /**
     * Draws the cubemap.
     *
     * @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 cubemap.
     *
     * This is a pure virtual method of SceneContent.
     *
     */
    void reset (void) {}


    /**
     * Sets the name of the texture for a face of the cubemap.
     *
     * @param face The face of which we want to set the name of the texture.
     * @param fileName The new name of the texture.
     *
     */
    void setTexture(CUBEMAP_FACE face, const QString& fileName);


    /**
     * Gets the name of the texture for a face.
     *
     * @param face The face of which we want to know the name of the texture.
     *
     * @return A QString with the name of the texture.
     *
     */
    QString getTexture(CUBEMAP_FACE face) const;


    /**
     * Loads the cubemap from a QDomElement.
     *
     * @param element The QDomElement to read from.
     *
     */
    void initFromDOMElement(const QDomElement& element);


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


    /// Public static const scene name.
    static const QString g_scene_name;


private:


    /// The 6 textures names.
    /// One for each face.
    /// Indices are defined by the enum CUBEMAP_FACE.
    QString m_textureFileNames[6];


    /// The 6 textures indices (one for each face).
    unsigned int m_textureIndex[6];

};


#endif // __DEFAULT_CUBEMAP_SCENE_CONTENT_H__