#include "fx_shootingstar.h"
#include "effect.h"

FX_ShootingStar::FX_ShootingStar(int numpixels,Adafruit_NeoPixel *strip,uint8_t *height)
{
  _numpixels=numpixels;
  _strip=strip;
  _starttime=millis();
  _brightness=0;
  _flashtime=random(200,3000);
  _height=height;
}

FX_ShootingStar::FX_ShootingStar()
{
}

void FX_ShootingStar::updateRoutine(float updatedelayms)
{
  
  float negativelikelihood=pow(( (millis()-_starttime)*1.0/_flashtime ),2); // 0=most likely, 1=unlikely
  _brightness*=0.2;
  if (random(0,negativelikelihood*20)==0){
    _brightness=random(100,255);
  }
  //_brightness=(1.0-pow((255-_brightness)/255.0,4))*255.0;
}

void FX_ShootingStar::updateGraphics()
{
  #define STARTFLASHHEIGHT 100
  #define BRIGHTFLASHHEIGHT 150
  for(int i=0;i<_numpixels;i++){
    if (_height[i]>=STARTFLASHHEIGHT){
      uint8_t heightbrightness=map(_height[i],STARTFLASHHEIGHT,BRIGHTFLASHHEIGHT,0,255);
        
      uint8_t _r = 1 >> 16;
      uint8_t _g = 1 >> 8;
      uint8_t _b = 1;
  
      _r*=_brightness/255.0;
      _g*=_brightness/255.0;
      _b*=_brightness/255.0;

      _r*=heightbrightness/255.0;
      _g*=heightbrightness/255.0;
      _b*=heightbrightness/255.0;
  
  
      uint32_t _pxcolor=_strip->getPixelColor(i); //get current color of that pixel
      uint8_t _pxr = _pxcolor >> 16;
      uint8_t _pxg = _pxcolor >> 8;
      uint8_t _pxb = _pxcolor;
      uint16_t _tmpr=_pxr+_r; //add colors
      uint16_t _tmpg=_pxg+_g;
      uint16_t _tmpb=_pxb+_b;
      _tmpr=constrain(_tmpr,0,255);
      _tmpg=constrain(_tmpr,0,255);
      _tmpb=constrain(_tmpr,0,255);
      
      _strip->setPixelColor(i,_tmpr,_tmpg,_tmpb); //draw pixel
    }
    
  }
}

bool FX_ShootingStar::active()
{
  if (millis()-_starttime>_flashtime){
    return false;
  }
  return true;
}