// Global Variables
const int thermistorPin = 34;
const int numSamples = 600000; // How many samples in 10 minutes
const unsigned long printInterval = 1000;
const unsigned long summaryInterval = 10 * 60 * 1000; // 10 minutes
const int numSummaries = 144; // Total 10 minute in 24 hours
const unsigned long oneDay = 24 * 60 * 60 * 1000; // 24 Hours

// Variables used to calculate temp
int Vo;
float R1 = 20000;
float R2;
float logR2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;
float temperature;
int totalValue = 0;
 float totalAverage = 0;
// To keep time
unsigned long startTime = 0;
unsigned long lastPrintTime = 0;
unsigned long lastSummaryTime = 0;
int summaryIndex = 0;

struct summary { // Struct to store values easily
  float minValue = 0;
  float maxValue = 0;
  float average = 0;
};
struct summary readings[144]; // 144 array for all 10 minutes in 24 hours

void getSamples() { // Function to get the values of the last 10 minutes
  float sumValue = 0;
  float minValue = 1000; // Initialize very high so the first data is lower
  float maxValue = -1000; // Initialize very low so the first data is higher
  int sampleCount = 0;

  for (int i = 0; i < numSamples; i++) { // Goes through every sample in the last 10 minutes

    // Calculates temperature
    Vo = analogRead(thermistorPin);
    R2 = R1 * (1023.0 / (float)Vo - 1.0);
    R2 = R2 * -1.0;
    logR2 = log(R2);
    temperature = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2));
    temperature = temperature - 273.15;
    temperature = temperature - 10.0;

    if (temperature < minValue) {
      minValue = temperature;  // Update minValue if a lower value is found
    }
    if (temperature > maxValue) {
      maxValue = temperature;  // Update maxValue if a higher value is found
    }
    totalValue = totalValue + temperature; // To find average of all 24 hours
    sumValue = sumValue + temperature; // To find average of 10 minutes
    sampleCount++;

    
  }
  readings[summaryIndex].minValue = minValue; // Assigns minValue into the struct
  readings[summaryIndex].maxValue = maxValue; // Assigns maxValue into the struct
  readings[summaryIndex].average = sumValue / numSamples; // Assigns average into the struct

  summaryIndex++; 
}

void printLastSummary() { // Prints previous 10 minute summary
  struct summary lastSummary;
  lastSummary = readings[summaryIndex - 1]; // Minus 1 to go to previous summary

  Serial.println("Last 10-Minute Summary:");
  Serial.print("Min Value in Celsius: ");
  Serial.println(lastSummary.minValue);
  Serial.print("Min Value in Fahrenheit: ");
  Serial.println((lastSummary.minValue * 9 / 5) + 32);
  Serial.print("Max Value in Celsius: ");
  Serial.println(lastSummary.maxValue);
  Serial.print("Max Value in Fahrenheit: ");
  Serial.println((lastSummary.maxValue * 9 / 5) + 32);
  Serial.print("Average in Celsius: ");
  Serial.println(lastSummary.average);
  Serial.print("Average in Fahrenheit: ");
  Serial.println((lastSummary.average * 9 / 5) + 32);
  Serial.println();
}

void printAllSummaries() { // Goes through the 144 array and prints all 144 summaries.
  for (int i = 0; i < numSummaries; i++) {
    Serial.print("Summary ");
    Serial.print(i + 1);
    Serial.println(":");
    Serial.print("Min Value in Celsius: ");
    Serial.println(readings[i].minValue);
    Serial.print("Min value in Fahrenheit: ");
    Serial.println((readings[i].minValue * 9 / 5) + 32);
    Serial.print("Max Value in Celsius: ");
    Serial.println(readings[i].maxValue);
    Serial.print("Max value in Fahrenheit: ");
    Serial.println((readings[i].maxValue * 9 / 5) + 32);
    Serial.print("Average in Celsius: ");
    Serial.println(readings[i].average);
    Serial.print("Average in Fahrenheit: ");
    Serial.println((readings[i].average * 9 / 5) + 32);
  }
}

void printSummaries() { // Prints all previous summaries
  
      for (int i = 0; i < numSummaries; i++) {
        if (readings[i].average != 0 && readings[i].minValue != 0 && readings[i].maxValue != 0){ // Only prints if data isn't 0 so it doesn't print empty indexes
    Serial.print("Summary ");
    Serial.print(i + 1);
    Serial.println(":");
    Serial.print("Min Value in Celsius: ");
    Serial.println(readings[i].minValue);
    Serial.print("Min value in Fahrenheit: ");
    Serial.println((readings[i].minValue * 9 / 5) + 32);
    Serial.print("Max Value in Celsius: ");
    Serial.println(readings[i].maxValue);
    Serial.print("Max value in Fahrenheit: ");
    Serial.println((readings[i].maxValue * 9 / 5) + 32);
    Serial.print("Average in Celsius: ");
    Serial.println(readings[i].average);
    Serial.print("Average in Fahrenheit: ");
    Serial.println((readings[i].average * 9 / 5) + 32);
  }
  }
}



void setup() { // Setup my code
  pinMode(thermistorPin, INPUT); // Sets my pin 34 so it inputs data
  Serial.begin(9600); // 9600 baud
  startTime = millis(); // Uses millis to set start time
  lastPrintTime = startTime;
  lastSummaryTime = startTime;
}

void loop() {
  unsigned long currentTime = millis(); // Initializes Current time to millis
  unsigned long elapsedTime = currentTime - startTime; // Calculates Elapsed time

// Calculates temperature
  Vo = analogRead(thermistorPin);
  R2 = R1 * (1023.0 / (float)Vo - 1.0);
  R2 = R2 * -1.0;
  logR2 = log(R2);
  T = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2));
  T = T - 273.15;
  T = T - 10.0;

// Prints temp every second
  Serial.print("Celsius: ");
  Serial.println(T);
  delay(1000);



    // Read user input
    char userInput = Serial.read();

    // Check if the user wants summaries
    if (userInput == 'Y' || userInput == 'y') {
      // Call the function to get samples and print summaries
      printSummaries();
    }

  if (currentTime - lastSummaryTime >= summaryInterval) { // Checks to see if 10 minutes has passed
    getSamples();
    printLastSummary();
    lastSummaryTime = currentTime; // Updates last SummaryTime to when it printed
  }


  if (elapsedTime >= oneDay) { // Checks to see if 24 hours has passed
    printAllSummaries();
    totalAverage = totalValue / 86400;
    Serial.print("The total average for all 24 hours in Celsius is: ");
    Serial.println(totalAverage);
    Serial.print("The total average for all 24 hours in Fahrenheit is: ");
    Serial.println((totalAverage * 9 / 5) + 32);
    startTime = currentTime; // Resets for the next 24 hours
    summaryIndex = 0; // Resets for the next 24 hours
  }
}