#include <math.h>

int analogPin = 32;
float val = 0.0;
unsigned long myTime = 0;
float highest= -1000.0;//Low number to start out with
float lowest = 1000.0;//high number to start out with
float temperatureReadings[200];
float tenMinAvg = 0.0;
float overallAvg = 0.0;
int totalTenMinReadings = 0;
int tenMinCount = 0;
int totalReadings = 0;
unsigned long totalReadingsCount = 0;

//Conversion function to Fahrenheit
float fConvert(float boardReading)
{
  //variable definitions for the constants
  float R1 = 10000;
  float logR2, R2, T;
  float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;

  //Conversion begins here
  R2 = R1 * (4095.0 / (float)boardReading - 1.0);
  logR2 = log(R2);
  T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T = T - 273.15;
  T = (T * 9.0)/ 5.0 + 32.0; 
  return T;
}
//void getTenMinAvg(float thermistor), highestValues(float thermistor), lowestValues(float thermistor)

//declare these functions below
void printSummaries()
{
  int i;
  Serial.printf("The highest reading was: %f F\n", highest);
  Serial.printf("The lowest reading was: %f F\n", lowest);
  Serial.printf("The overall average was: %f F\n", overallAvg);
  Serial.println("Ten minute average readings of this room are: ");
  for (int i = 0; i<totalTenMinReadings; i++)
  {
    Serial.printf("%d, %f F\n",(i+1), temperatureReadings[i]);
  }
  Serial.println("END report");
 
}

void getTenMinAvg(float thermistor)
{
  
 //prevents infinate number as average first time through is the same as the currrent reading(thermistor)
  if(tenMinCount == 0)
  {
    tenMinAvg = thermistor;
    tenMinCount = 1;
  }
  else
  {
    tenMinCount ++;
    tenMinAvg = (tenMinAvg*(tenMinCount-1)+thermistor)/tenMinCount;
  }
  

  if(millis() > (myTime + 600000))//only true 10 minutes(600000 mS) after myTime
  {
    temperatureReadings[totalTenMinReadings] = tenMinAvg;
    Serial.printf("10 min value: %fF\n", tenMinAvg);
    tenMinAvg = 0.0;
    tenMinCount = 0;
    totalTenMinReadings++; 
    myTime = millis();
  }
 
}

void highestValue(float thermistor)
{
  
  if(thermistor > highest)
  {
    //Serial.printf("new highest to be set %f old %f\n", thermistor, highest);
    highest = thermistor;
  }
}

void lowestValue(float thermistor)
{

  if(thermistor < lowest)
  {
    //Serial.printf("new lowest to be set %f old %f\n", thermistor, lowest);
    lowest = thermistor;
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Type y to see the summary reports");
}

void loop() {
  // put your main code here, to run repeatedly:

  //variable declarations
  char summary;
  val = analogRead(analogPin);

  //convert the reading to degrees fahrenheit
  val = fConvert(val);
 

 //prevents infinate number as average first time through is the same as the currrent reading(val)
  if(totalReadingsCount == 0)
  {
    overallAvg = val;
    totalReadingsCount = 1;
  }
  else
  {
    //Serial.printf(" #1 Total reading: %ld Temp: %f Overall AVG: %f\n",totalReadingsCount, val, overallAvg);

    // debug: Serial.printf("Average: %f New reading: %f Iterations: %d\n", overallAvg, val, totalReadingsCount);
    totalReadingsCount++;
    overallAvg = (overallAvg*(totalReadingsCount-1)+val)/totalReadingsCount;

    //Serial.printf(" # 2Total reading: %ld Temp: %f Overall AVG: %f\n",totalReadingsCount, val, overallAvg);
  }
  

  //update min and max fucntions
  highestValue(val);
  lowestValue(val);

  //update average functions
  getTenMinAvg(val);

  //User input and what to do with it; when y or Y is entered summarys are given.
  
  if(Serial.available() > 0)
  {
    summary = Serial.read();
    if(summary == 'y'|| summary == 'Y')
    {
      //Functions that print reports
      Serial.println("Got it");
      printSummaries();
    }
  }
  
}