#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

Adafruit_BME280 bme; // I2C

// Constants
unsigned long myTime;
const unsigned long SAMPLING_RATE = 1000;
const int MEASUREMENTS_PER_WINDOW = 600;
const int WINDOWS_PER_REPORT = 18;

// Global variables to compute the 10-minute average
float avg_temp = 0;
int num_measurements = 0;

// Global variables for reporting purposes
float averages[WINDOWS_PER_REPORT];
int averages_index;
float overall_max = -273.15; // Initialize to lowest possible temperature
float overall_min = 1000;    // Initialize to highest possible temperature

void setup()
{
  Serial.begin(9600);
  Serial.println(F("BME280 test"));
  bool status;
  status = bme.begin(0x76);
  if (!status)
  {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }
  Serial.println("-- Test --");
  Serial.println();
}

void loop()
{
  myTime = millis();
  float temp = bme.readTemperature();

  // Print the current temperature
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.println(" *C");

  // Check for the overall maximum and minimum temperatures
  if (temp > overall_max)
  {
    overall_max = temp;
  }
  if (temp < overall_min)
  {
    overall_min = temp;
  }

  // Calculate the 10-minute average
  avg_temp += temp;
  num_measurements += 1;

  // If 10 measurements have been taken, calculate the average and store it
  if (num_measurements == MEASUREMENTS_PER_WINDOW)
  {
    avg_temp /= num_measurements;

    // Store the average in the array
    averages[averages_index] = avg_temp;
    averages_index++;

    // Reset the counters
    num_measurements = 0;
    avg_temp = 0;
  }

  // If the 'S' character is received, print the summary report
  if (Serial.available() > 0)
  {
    char input = Serial.read();
    if (input == 'S')
    {
      float overall_avg = 0;
      for (int i = 0; i < averages_index; i++)
      {
        overall_avg += averages[i];
      }
      overall_avg /= averages_index;

      // Print the summary report
      Serial.println("Summary Report:");
      Serial.print("Overall Average Temperature: ");
      Serial.print(overall_avg);
      Serial.println(" *C");
      Serial.print("Overall Maximum Temperature: ");
      Serial.print(max(overall_max, overall_avg));
      Serial.println(" *C");
      Serial.print("Overall Minimum Temperature: ");
      Serial.print(min(overall_min, overall_avg));
      Serial.println(" *C");
      Serial.print("Total Runtime: ");
      Serial.print(myTime / 1000);
      Serial.println(" seconds");
      Serial.println("Average Temperatures per 10-minute Window:");
      for (int i = 0; i < averages_index; i++)
      {
        Serial.print("Window ");
        Serial.print(i + 1);
        Serial.print(": ");
        Serial.print(averages[i]);
        Serial.println(" *C");
      }
    }
  }

  delay(SAMPLING_RATE);
}