/********************************************************************************************************
  neopixel_basic:
  Written by Scott Kildall
  
  This will light just a NeoPixel strip of NeoPixels
  
---------------------------------------------------------------------------------------------------------
NeoPixel Information for initializing the strip, below
  60ma/pixel for current load
  Parameter 1 = number of pixels in strip
  Parameter 2 = pin number (most are valid)
  Parameter 3 = pixel type flags, add together as needed:
    NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
    NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
    NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
    NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)

**********************************************************************************************************/

#include <Adafruit_NeoPixel.h>
 
// the data pin for the NeoPixels
int neoPixelPin = 6;

// How many NeoPixels we will be using, charge accordingly
int numPixels = 25;

// Instatiate the NeoPixel from the ibrary
Adafruit_NeoPixel strip = Adafruit_NeoPixel(numPixels, neoPixelPin, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show();
  strip.clear();
  Serial.begin(115200);
}

void loop() {
   // set the colors for the strip
   /*
   for( int i = 0; i < numPixels; i++ ) {
       strip.setPixelColor(i, 255, 0, 0); strip.show();
       delay(100);
       strip.setPixelColor(i, 0, 0, 0);
   }
   */
  int i = 0;
  while(1) {
    setPixelColorHsv(strip, i, 255, 255, 255);
    Serial.println(i);


    delay(1000);
    strip.show();

    i++;
  }
   
   // wait for a short amount of time -- sometimes a short delay of 5ms will help
   // technically we only need to execute this one time, since we aren't changing the colors but we will build on this structure
   delay(1000);
}

void setPixelColorHsv(Adafruit_NeoPixel ls, uint16_t pixel, uint8_t h, uint8_t s, uint8_t v) {
  int lr, lg, lb;
  hsvToRgb(h, s, v, lr, lg, lb);
  
  Serial.println(lr);
  Serial.println(lg);
  Serial.println(lb);
  Serial.println("\n");
  ls.setPixelColor(pixel, lr, lg, lb);
}

void hsvToRgb(int h, int s, int v, int &r, int &g, int &b) {
    float fh = h / 255.0;
    float fs = s / 255.0f;
    float fv = v / 255.0f;

    int i = static_cast<int>(fh * 6);
    float f = fh * 6 - i;
    float p = fv * (1 - fs);
    float q = fv * (1 - f * fs);
    float t = fv * (1 - (1 - f) * fs);

    switch (i % 6) {
        case 0:
            r = static_cast<int>(fv * 255);
            g = static_cast<int>(t * 255);
            b = static_cast<int>(p * 255);
            break;
        case 1:
            r = static_cast<int>(q * 255);
            g = static_cast<int>(fv * 255);
            b = static_cast<int>(p * 255);
            break;
        case 2:
            r = static_cast<int>(p * 255);
            g = static_cast<int>(fv * 255);
            b = static_cast<int>(t * 255);
            break;
        case 3:
            r = static_cast<int>(p * 255);
            g = static_cast<int>(q * 255);
            b = static_cast<int>(fv * 255);
            break;
        case 4:
            r = static_cast<int>(t * 255);
            g = static_cast<int>(p * 255);
            b = static_cast<int>(fv * 255);
            break;
        case 5:
            r = static_cast<int>(fv * 255);
            g = static_cast<int>(p * 255);
            b = static_cast<int>(q * 255);
            break;
    }
}