#ifndef PHONGENTITY_H
#define PHONGENTITY_H

#include <glew/glew.h>
#include <glm/mat4x4.hpp>
#include <vector>

class Mesh;
class Material;
class Shader;

class PhongEntity
{
protected:
    Mesh* mesh;

    // modern opengl :

    enum {
		// required buffers
		POSITION_BUFFER,
		// optionnal buffers :
		NORMAL_BUFFER, TEXCOORD_BUFFER, TANGENT_BUFFER,
		// indices buffers
		INDICES_BUFFER
	};

    GLuint vao;
    int nb_buffers;
    GLuint* vbo;

    void modernInit(bool isDynamic);

    // old opengl :

    GLuint displayList;

    void crappyInit();

public:
    /**
     * @brief the model matrix is public, so the user can manipulate it in any way he desires.
     */
    glm::mat4 modelMatrix;

    PhongEntity(Mesh* myMesh);

    void drawDisplayList();
    void drawGroup(int groupId); // temporarily public

    void initGL(bool isDynamic = false);
    void destroyGL();

    Mesh* getMesh() {return mesh;}

    /**
     * @brief this method returns a clone of the current entity.
     * The same VAO/displayList will be used to render both, so there is no need to call initGL on the clone
     */
    PhongEntity* clone();
};

#endif // PHONGENTITY_H