#ifndef PHONGMATERIAL_H
#define PHONGMATERIAL_H

#include "material.h"
#include "glm/vec3.hpp"
#include <string>

class Texture;

struct PhongMaterial : public Material
{
    enum TextureSlots
    {
        DIFFUSE_SLOT,
        EMISSION_SLOT,
        NORMALS_SLOT,
        SPECULAR_SLOT,
        ALPHA_SLOT,
        NB_PHONG_SLOTS
    };

    glm::vec3 emission;
    glm::vec3 diffuse;
    glm::vec3 specular;
    float shininess;
    Texture* textures[NB_PHONG_SLOTS];
    std::string textureNames[NB_PHONG_SLOTS];

	PhongMaterial() :
        emission(0),
		diffuse(0.5f),
		specular(0.5f),
		shininess(10)
    {
        for(int i=0; i<NB_PHONG_SLOTS; ++i)
            textures[i] = NULL;
    }

    void setTexture(TextureSlots slot, Texture* texture = NULL, const std::string &name = "")
        { textures[slot] = texture; textureNames[slot] = name; }

    virtual ~PhongMaterial() {}

    virtual void bindAttributes(Shader* myShader);
    
    virtual unsigned int getFlags();
    
    /**
     * @brief serializeMaterial saves a material to a file
     * @return true if the save succeeded
     */
    static bool serialize(PhongMaterial* mat, FILE *file);
    bool serialize(FILE *file) { return serialize(this, file); }
    
    /**
     * @brief deserializeMaterial creates a material from reading a file,
     * be careful, this method has no way to load the attached textures, so you must do it manually,
     * however, you can use the texture names stored in the textureNames array to find which textures are requested.
     * @return the material or NULL if the loading failed
     */
    static PhongMaterial* deserialize(FILE *file);
};

#endif // PHONGMATERIAL_H