#include <EEPROM.h>

#define TRIGGER_PIN  14
#define ECHO_PIN     12
#define MAX_DISTANCE 400
#define SAMPLE_INTERVAL_MS 600000 // 10 minutes in milliseconds
#define PRINT_INTERVAL_MS 1000    // 1 second in milliseconds

typedef struct {
  float distanceSum;
  int count;
  float maxDistance;
  float minDistance;
} Data;

Data data;

unsigned long lastSampleTime = 0;
unsigned long lastPrintTime = 0;

void setup() {
  Serial.begin(115200);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  EEPROM.begin(sizeof(Data));
  EEPROM.get(0, data);
  if (data.minDistance == 0) {
    data.minDistance = MAX_DISTANCE;
  }
}

void loop() {
  if (millis() - lastSampleTime > SAMPLE_INTERVAL_MS) {
    lastSampleTime = millis();
    sampleDistance();
  }
  
  if (millis() - lastPrintTime > PRINT_INTERVAL_MS) {
    lastPrintTime = millis();
    printDistance();
  }
  
  if (Serial.available() > 0) {
    char command = Serial.read();
    if (command == 's') {
      printSummary();
    }
  }
}

void sampleDistance() {
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  float distance = pulseIn(ECHO_PIN, HIGH) / 58.0;

  if (distance > 0 && distance <= MAX_DISTANCE) {
    data.distanceSum += distance;
    data.count++;
    if (distance > data.maxDistance) {
      data.maxDistance = distance;
    }
    if (distance < data.minDistance) {
      data.minDistance = distance;
    }
    EEPROM.put(0, data);
  }
}

void printDistance() {
  float distance = data.distanceSum / data.count;
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
}

void printSummary() {
  float averageDistance = data.distanceSum / data.count;
  Serial.print("Average Distance: ");
  Serial.print(averageDistance);
  Serial.println(" cm");
  Serial.print("Max Distance: ");
  Serial.print(data.maxDistance);
  Serial.println(" cm");
  Serial.print("Min Distance: ");
  Serial.print(data.minDistance);
  Serial.println(" cm");
}