#include <FastLED.h>

#define pWIDTH 16
#define pHEIGHT 8
#define NUM_LEDS ((pWIDTH) * (pHEIGHT))

extern CRGBPalette16 gCurrentGradientPalette;
extern CRGBPalette16 gTargetGradientPalette;

CRGB leds[NUM_LEDS];
bool loadingFlag = true;

void drawPixelXY(int8_t x, int8_t y, CRGB color) {
  if (leds == nullptr) return;
  if (x < 0 || x > pWIDTH - 1 || y < 0 || y > pHEIGHT - 1) return;
  int16_t thisPixel = getPixelNumber(x, y);
  if (thisPixel >= 0 && thisPixel < NUM_LEDS) leds[thisPixel] = color;
}

uint16_t getPixelNumber(uint8_t x, uint8_t y) {
  if (x >= pWIDTH || y >= pHEIGHT)
    return NUM_LEDS;
  if (y & 1)
    x = pWIDTH - 1 - x;
   return x + (y * pWIDTH);
}

uint32_t getPixColor(int16_t thisPixel) {
  if (leds == nullptr) return 0;
  if (thisPixel < 0 || thisPixel > NUM_LEDS - 1) return 0;
  return (((uint32_t)leds[thisPixel].r << 16) | ((uint32_t)leds[thisPixel].g << 8 ) | (uint32_t)leds[thisPixel].b);
}

uint32_t getPixColorXY(int8_t x, int8_t y) {
  return getPixColor(getPixelNumber(x, y));
}

uint16_t XY(uint8_t x, uint8_t y) {
  return getPixelNumber(x, y);
}

void setup() {
  FastLED.addLeds<WS2812B, 3, GRB>(leds, NUM_LEDS);
}

uint8_t chA=0;
uint8_t chB=0;
uint8_t chC=0;

uint8_t offsetA=0;
uint8_t offsetB=0;
uint8_t offsetC=0;

void loop() {
    if (loadingFlag) {
    loadingFlag = false;
    FastLED.clear();
    offsetA=random8(pWIDTH);
    offsetB=random8(pWIDTH);
    offsetC=random8(pWIDTH);
  }

  // EVERY_N_SECONDS(4) {
  //   offsetA=random8(pWIDTH);
  //   offsetB=random8(pWIDTH);
  //   offsetC=random8(pWIDTH);
  // }

  //FastLED.clear();
  fadeToBlackBy(leds, NUM_LEDS, 92);

  if (chA==0) offsetA=random8(pWIDTH/2);
  if (chB==0) offsetB=random8(pWIDTH/2);
  if (chC==0) offsetC=random8(pWIDTH/2);

  chA=beatsin8(pWIDTH+offsetA,0,pWIDTH-1);
  chB=beatsin8(pWIDTH+offsetB,0,pWIDTH-1);
  chC=beatsin8(pWIDTH+offsetC,0,pWIDTH-1);

  for(uint8_t y=0; y<pHEIGHT; y++){
    drawPixelXY(chA,y,CHSV(0, 255, 255));
    drawPixelXY(chB,y,CHSV(64, 255, 255));
    drawPixelXY(chC,y,CHSV(96, 255, 255));
  }

  // for(uint8_t x=0; x<pWIDTH; x++){
  //   drawPixelXY(x,chB,CHSV(0, 255, 255));
  //   drawPixelXY(x,chC,CHSV(64, 255, 255));
  //   drawPixelXY(x,chA,CHSV(96, 255, 255));
  // }

  FastLED.delay(60);

}