#include <Adafruit_NeoPixel.h>
#include <Wire.h> // must be included here so that Arduino library object file references work
#include <RtcDS3231.h>

void update_clock();
void showseconds();

RtcDS3231<TwoWire> Rtc(Wire);

#define PIN        6 // Which pin on the Arduino is connected to the NeoPixels?
const unsigned int NUMPIXELS = 83; // How many NeoPixels are attached to the Arduino?

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

unsigned long color_on, color_off, color_sec, color_min, color_hour;

const float seconds2pixel = NUMPIXELS /60.0;

void setup() {
  Serial.begin(9600);
  Rtc.Begin();
  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)


  color_on = pixels.Color(0, 0, 255);
  color_off = pixels.Color(0, 0, 0);
  color_sec = pixels.Color(0, 255, 0);
  color_min = pixels.Color(0, 255, 255);
  color_hour = pixels.Color(255, 255, 0);

  pixels.fill(color_off);
  pixels.show();
  
}

int last_second = 0;
int second = 0;
int minute = 0;
int hour = 0;

void update_clock()
{
  if(last_second != second)
  {
  
    Serial.print("Now is -> ");
    Serial.print(hour);
    Serial.print(":");
    Serial.print(minute);
    Serial.print(":");  
    Serial.println(second);
    
    last_second = second;
    // first delete all ...
    pixels.fill(color_off);
    // second show seconds (^_^);
    showseconds();
    // third show minutes
    
    // fourth show hour

    pixels.show();   // Send the updated pixel colors to the hardware.
  }    
}

void showseconds()
{
  int secondpixelpos1 = 0;
  int secondpixelpos2 = 0;
  int secondpixelpos3 = 0;

  float centerposf = seconds2pixel  * second;
  secondpixelpos2 = round(centerposf);
  if(secondpixelpos2 == NUMPIXELS)
  {
    secondpixelpos1 = secondpixelpos2 - 1;
    secondpixelpos3 = 0;
  }
  else if(secondpixelpos2 == 0)
  {
    secondpixelpos1 = NUMPIXELS;
    secondpixelpos3 = secondpixelpos2 + 1;
  }
  else
  {
    secondpixelpos1 = secondpixelpos2 - 1;
    secondpixelpos3 = secondpixelpos2 + 1;
  }

  Serial.println(secondpixelpos1);
  Serial.println(secondpixelpos2);
  Serial.println(secondpixelpos3);
  
  pixels.setPixelColor(secondpixelpos1, color_sec);
  pixels.setPixelColor(secondpixelpos2, color_sec);
  pixels.setPixelColor(secondpixelpos3, color_sec);
}
  
RtcDateTime now;

void loop() {

  now = Rtc.GetDateTime();
  hour = now.Hour();
  minute = now.Minute();
  second = now.Second();

  //RtcTemperature temp = Rtc.GetTemperature();
  update_clock();

  
}