#include <Adafruit_NeoPixel.h>

#include <WiFi.h>
/*
    Tratto dal sito di Mauro Alfieri
    https://www.mauroalfieri.it/elettronica/neopixel-ring-16led-strandtest.html
*/
 #define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     3600*7
#define UTC_OFFSET_DST 0
#define PIN 18
 
Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino 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)

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.




 void printLocalTime() {
  struct tm timeinfo;
  
  if (!getLocalTime(&timeinfo)) {

    Serial.println("Connection Err");
    return;
  }

  //Serial.println(&timeinfo, "%H:%M:%S - %d/%m/%Y   %Z");
byte pixelH ,pixelM,pixelS;
byte hour = timeinfo.tm_hour;
hour++;
if (hour == 24) hour = 0;
byte minute = timeinfo.tm_min;
byte second = timeinfo.tm_sec;




if (hour >= 18 && hour < 24) pixelH = 12 - (48 - hour * 2);
if (hour >= 6 && hour < 18) pixelH = abs(hour*2 - 12);
if (hour < 6 || hour == 24) pixelH = abs(hour*2 + 12);

if (minute < 29) pixelM = round(minute/2.5) + 12;
else pixelM = round(minute/2.5) - 12;
if (second < 29) pixelS = round(second/2.5) + 12;
else pixelS = round(second/2.5) - 12;
 
 strip.clear();
   for (int i=0;i<24;i=i+2) {
    strip.setPixelColor(i, strip.Color(127, 127, 0));
  }
 strip.setPixelColor(pixelH, strip.Color(255, 0, 0));

 if (minute>= 30) strip.setPixelColor(pixelH+1, strip.Color(127, 0, 0));
 strip.setPixelColor(pixelM, strip.Color(0,255, 0));
strip.setPixelColor(pixelS, strip.Color(0,0, 255));

strip.show();

Serial.printf("%02d:%02d:%02d\n", hour, minute, second);

}
void setup() 
{
  Serial.begin(115200);

   WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
   
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  
  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
 
}
 
void loop() {

    printLocalTime();
    delay(1000);
 //
 /*
  // Sequenze monocolore
  colorWipe(strip.Color(255, 0, 0), 30); // Red
  colorWipe2(strip.Color(255, 255, 0), 60); // Red
  colorWipe(strip.Color(0, 255, 0), 30); // Green
  colorWipe2(strip.Color(0, 255, 255), 60); // Green 
  colorWipe(strip.Color(0, 0, 255), 30); // Blue
  colorWipe2(strip.Color(255, 0, 255), 60); // Blue
  /* Tremolii
  theaterChase(strip.Color(127, 127, 127), 50); // White
  theaterChase(strip.Color(127, 0, 0), 50); // Red
  theaterChase(strip.Color(0, 0, 127), 50); // Blue
  */
/*
  //rainbow(20);
  //rainbowCycle(20);
  //theaterChaseRainbow(10);
} 
 
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
}

void colorWipe2(uint32_t c, uint8_t wait) {
  int n=int(strip.numPixels()/3);
  for(uint16_t i=0; i<n; i++) {
    strip.setPixelColor(i, c);
    strip.setPixelColor(i+n, c);
    strip.setPixelColor(i+2*n, c);
    strip.show();
    delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;
 
  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}
 
// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;
 
  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i*256/strip.numPixels())+j)&255));
    }
    strip.show();
    delay(wait);
  }
}
 
//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c); //turn every third pixel on
      }
      strip.show();
 
      delay(wait);
 
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0); //turn every third pixel off
      }
    }
  }
}
 
//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        //turn every third pixel on
        strip.setPixelColor(i+q, Wheel( (i+j) % 255)); 
      }
      strip.show();
 
      delay(wait);
 
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}
 
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  */
}