#ifndef LIGHT_H
#define LIGHT_H

#include <glm/vec3.hpp>
#include <string>

class FrameBuffer;
class Shader;
class Scene;
class Texture;

class Light
{
private:
    // standard attributes
    glm::vec3 position;
    glm::vec3 direction;
    float angle; // spotlight not supported yet
    glm::vec3 color;

    bool isDir;

    // shadowmap attributes
    bool shadowCaster;
    FrameBuffer* shadowMap;
    Shader* shaders[2];
    static const char* vertSource;
    static const char* fragSource;
public:
    Light();
    void initDirectionnalLight(glm::vec3 dir = glm::vec3(1, 0, 0), glm::vec3 lightColor = glm::vec3(1));
    void initPointLight(glm::vec3 pos = glm::vec3(0), glm::vec3 lightColor = glm::vec3(1));
    // spotlight not supported yet
    //void initSpotLight(glm::vec3 pos = glm::vec3(0), glm::vec3 dir = glm::vec3(1, 0, 0), float spotAngle = 360, glm::vec3 lightColor = glm::vec3(1));

    bool isDirectionnal();
    glm::vec3 getDir() {return direction;}
    glm::vec3 getPos() {return position;}
    glm::vec3 getColor() {return color;}

    void initShadowMap(int resWidth, int resHeight);
    void generateShadowMap(Scene* scene);
    Texture* getShadowMap();
};

#endif // LIGHT_H