#include <FastLED.h>
#include <WiFi.h>
#include <sntp.h>

#define LED_PIN 4
#define NUM_LEDS 60
#define LED_ORDER GRB
#define LED_TYPE WS2812B

CRGB leds[NUM_LEDS];

void setup(){
  FastLED.addLeds<LED_TYPE, LED_PIN, LED_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness(128);
  Serial.begin(115200);

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
  }
  
  configTime(0,0,"pool.ntp.org");
  setenv("TZ","MYT-8",1); //your timezone
  tzset();
}

//function for mapping hour
long map_hour(double x, long in_min, long in_max, long out_min, long out_max) {
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

//from https://www.geeksforgeeks.org/modulus-two-float-double-numbers/
double findMod(double a, double b){
    double mod;
    // Handling negative values
    if (a < 0)
        mod = -a;
    else
        mod =  a;
    if (b < 0)
        b = -b;
 
    // Finding mod by repeated subtraction
     
    while (mod >= b)
        mod = mod - b;
 
    // Sign of result typically depends
    // on sign of a.
    if (a < 0)
        return -mod;
 
    return mod;
}

void loop(){
  FastLED.clear();
  time_t now = time(NULL);
  struct tm *tm = localtime(&now);
  
  double hour24 = ( ( ( ( tm->tm_hour ) * 3600 ) +( tm->tm_min * 60) + tm->tm_sec ) ), hour12 = ( ( ( ( tm->tm_hour-12 ) * 3600 ) +( tm->tm_min * 60) + tm->tm_sec ) );
  double new_hour = 0;
  
  if(tm->tm_hour > 12){
    new_hour = findMod(hour12,86400) / 3600;
  } else {
    new_hour = findMod(hour24,86400) / 3600;
  }
  
  leds[map_hour(new_hour, 0, 12, 0, NUM_LEDS)] = CRGB::Blue;
  leds[tm->tm_sec] = CRGB::Red;
  leds[tm->tm_min] = CRGB::Green;
  FastLED.show();
  delay(500);
}