///////////////////////////////////////////////////////////////////////////
//
//		Realistic rain real-time simulation program
//
//		Pierre Rousseau
//
///////////////////////////////////////////////////////////////////////////
//
//		Light Handling
//
///////////////////////////////////////////////////////////////////////////


#ifndef __RAIN_LIGHT__
#define __RAIN_LIGHT__



#include "CommonRain.h"
#include "ExampleApplication.h"
#include <vector>




/** RainLight class
  * enables a change of appearance of raindrops close to a light source
  */
class RainLight
{
private :
    SceneManager *mSceneMgr;
    SceneNode *mLightNode;
    SceneNode *mConeNode;
    BillboardSet *mBillboardSet;
    Billboard *mBillboard;

    ColourValue mColour;
    Vector3 mLightPos, mLightInitialPos, mLightDir;
    float mLightCutoff, mLightAttenuation;
    bool isAnimated;


    float stepH1, stepH2, stepH3, stepV1, stepV2;
    float h1, h2, h3;
    float v1, v2;

public :
    /** Constructor for street light. Should not be called directly. Use RainLightManager->addStreetLight() instead.*/
    RainLight(SceneManager *sceneMgr, int lightNumber = 0, ColourValue col = ColourValue::Red, Vector3 LightPos = Vector3(0, 0, 0), float LightAttenuation = 150);

    void animate();

    ColourValue getColour()
    {
        return mColour;
    }

    Vector3 getPosition()
    {
        return mLightPos;
    }

    Vector3 getDirection()
    {
        return mLightDir;
    }

    float getCutoff()
    {
        return mLightCutoff;
    }

    float getAttenuation()
    {
        return mLightAttenuation;
    }

    bool getIsAnimated()
    {
        return isAnimated;
    }

};



class RainLightManager
{
private :
    int lightCount;
    std::vector<RainLight *> lightVector;
    SceneManager *mSceneMgr;

public :
    RainLightManager(SceneManager *sceneMgr);

    ~RainLightManager();

    int getLightCount()
    {
        return lightCount;
    }

    void addStreetLight(ColourValue col = ColourValue::Red + ColourValue::Green + ColourValue::Blue, Vector3 LightPos = Vector3(0, 0, 0), float LightAttenuation = 150);

    /** defines the light information texture, used by the particles to get lighted */
    void createLightInfoTexture();

    void updateLightInfoTexture();

    void updateLights();

    void finalizeLights();
};

#endif // __RAIN_LIGHT__