const int THERMISTOR_PIN = 33; // Analog pin connected to the thermistor
const double THERMISTOR_NOMINAL = 10000.0; // Thermistor resistance at nominal temperature (in ohms)
const double TEMPERATURE_NOMINAL = 25.0; // Nominal temperature for the thermistor (in degrees Celsius)
const double B_COEFFICIENT = 3950.0; // Beta coefficient of the thermistor
const double SERIES_RESISTOR = 10000.0; // Value of the series resistor (in ohms)
const unsigned long TIMER_DURATION = 600000; // 10 minutes in milliseconds
const unsigned long twentyFourHours = 24UL * 60UL * 60UL * 1000UL; // Time in milliseconds for 24 hours


unsigned long startTime;

int averages[600];
double rollingAverages[600];


void setup() {
  Serial.begin(115200); // Initialize the serial communication
  startTime = millis(); // Record the starting time

}

double rollingAverage(int arr[600]) {
  int allData = 0;

  for (int i = 0; i < 600; ++i) {
    allData += arr[i];
  }

  double average = allData / 600;

  return average;
}

double allTimeAverage(double rollingAverages[600]) {
  int temp = 0;

  for (int i = 0; i < 600; ++i) {
    temp += rollingAverages[i];
  }

  double allTime = temp / 600;

  return allTime;
}

void loop() {
  unsigned long currentTime = millis(); // Get the current time
  int count = 0;

   // Calculate the elapsed time
  unsigned long elapsedTime = currentTime - startTime;

  while (currentTime - startTime < TIMER_DURATION && count < 600 && elapsedTime <= twentyFourHours) {
    int rawValue = analogRead(THERMISTOR_PIN); // Read the raw ADC value from the thermistor pin

    // Convert the raw value to resistance using the voltage divider formula
    double resistance = SERIES_RESISTOR * (4095.0 / rawValue - 1.0);
  
    // Calculate the temperature using the Steinhart-Hart equation
    double steinhart;
    steinhart = resistance / THERMISTOR_NOMINAL; // (R/R0)
    steinhart = log(steinhart); // ln(R/R0)
    steinhart /= B_COEFFICIENT; // (1/B) * ln(R/R0)
    steinhart += 1.0 / (TEMPERATURE_NOMINAL + 273.15); // + (1/To)
    steinhart = 1.0 / steinhart; // Invert
    double temperature = steinhart - 273.15; // Convert to Celsius

    averages[count] = temperature;
    ++count;
  
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.println("°C");
  
    delay(1000); // Delay for 1 second before reading again
  }

  if (elapsedTime >= twentyFourHours) {
    double a = allTimeAverage(rollingAverages);
    Serial.print("All Time Average: ");
    Serial.println(a);
  }

  double a = rollingAverage(averages); 

  int j = 0;

  Serial.print("Rolling average: ");
  Serial.println(a);

  //store in rolling averages
  rollingAverages[j] = a;
  ++j;

  //reset count
  count = 0;
  startTime = millis(); // Restart the timer

}