#ifndef PHONGMODULE_H
#define PHONGMODULE_H

#include "module.h"
#include <vector>
#include <cstddef>
#include <glew/glew.h>
#include "lights.h"

class Shader;
class PhongEntity;

class PhongModule : public Module
{
public:
    enum ShaderType {
        PHONG_COLOR, // rendering untextured mesh
        PHONG_TEXTURE, // rendering textured mesh
        //TODO : rendering bump mapped mesh
        NB_SHADERS
    };

    PhongModule(Lights::Light* myDirLight, Lights* myPointLights);

    void addEntity(PhongEntity* myEntity);
    void clearEntities();

    virtual void renderGL(Camera* myCamera, Scene* scene = NULL);
    virtual bool requiresModernOpenGL() {return false;}

    // modern opengl methods

    /**
     * @brief all used shaders shall be provided through this method before rendering
     */
	static void setShader(ShaderType slot, Shader* myShader);
	static Shader* getShader(ShaderType slot);
private:
	Lights::Light* dirLight;
	Lights* pointLights;
	GLuint dirLightLocation;
	GLuint nbPointLightsLocation;
	GLuint pointLightsLocation;
	std::vector<PhongEntity*> entities;

	static Shader* shaders[NB_SHADERS];
};

#endif // PHONGMODULE_H