#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <DHT.h>
#include <WiFi.h>
#include <HTTPClient.h>

// Pin Definitions
#define TRIG_PIN 5
#define ECHO_PIN 18
#define DHT_PIN 12  // DHT22 data pin on GPIO 12
#define SDA_PIN 21  // I2C SDA pin for MPU6050
#define SCL_PIN 22  // I2C SCL pin for MPU6050

#define DHTTYPE DHT22  // DHT sensor type

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
const char* webAppUrl = "https://script.google.com/macros/s/YourGoogleAppsScriptID/exec";  // Replace with your Google Apps Script URL

DHT dht(DHT_PIN, DHTTYPE);
Adafruit_MPU6050 mpu;

void setup() {
  // Serial Monitor setup
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // Pin mode setup
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // WiFi connection
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // DHT sensor setup
  dht.begin();

  // Initialize I2C communication with custom SDA and SCL pins
  Wire.begin(SDA_PIN, SCL_PIN);

  // Try to initialize the MPU6050 sensor
  if (!mpu.begin()) {
    Serial.println("MPU6050 not connected!");
    while (1) {
      delay(1000); // Wait for 1 second before retrying
    }
  }
  Serial.println("MPU6050 ready!");
}

void loop() {
  // Measure distance
  float distance = measureDistance();
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Measure temperature and humidity
  float temperature = readTemperatureWithRetry();
  float humidity = readHumidityWithRetry();
  
  // Print temperature and humidity
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  // Read accelerometer values
  sensors_event_t event;
  mpu.getAccelerometerSensor()->getEvent(&event);
  float accelX = event.acceleration.x;
  float accelY = event.acceleration.y;
  float accelZ = event.acceleration.z;

  // Print accelerometer values
  Serial.print("Accel X: ");
  Serial.print(accelX);
  Serial.println(" m/s^2");
  Serial.print("Accel Y: ");
  Serial.print(accelY);
  Serial.println(" m/s^2");
  Serial.print("Accel Z: ");
  Serial.print(accelZ);
  Serial.println(" m/s^2");

  // Send data to Google Apps Script
  sendDataToGoogleAppsScript(distance, temperature, humidity, accelX, accelY, accelZ);

  // Delay before next measurement
  delay(5000); // 5 seconds delay
}

float measureDistance() {
  // Send ultrasonic pulse
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Measure the duration of the echo signal
  long duration = pulseIn(ECHO_PIN, HIGH);

  // Calculate distance in centimeters
  float distance = duration * 0.0343 / 2;

  return distance;
}

float readTemperatureWithRetry() {
  float temperature = NAN;
  for (int i = 0; i < 3; ++i) {
    temperature = dht.readTemperature();
    if (!isnan(temperature)) {
      break;
    }
    delay(2000);
  }
  if (isnan(temperature)) {
    Serial.println("Failed to read temperature from DHT sensor!");
  }
  return temperature;
}

float readHumidityWithRetry() {
  float humidity = NAN;
  for (int i = 0; i < 3; ++i) {
    humidity = dht.readHumidity();
    if (!isnan(humidity)) {
      break;
    }
    delay(2000);
  }
  if (isnan(humidity)) {
    Serial.println("Failed to read humidity from DHT sensor!");
  }
  return humidity;
}

void sendDataToGoogleAppsScript(float distance, float temperature, float humidity, float accelX, float accelY, float accelZ) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    String url = String(webAppUrl) + "?distance=" + distance + "&temperature=" + temperature + "&humidity=" + humidity + "&accelX=" + accelX + "&accelY=" + accelY + "&accelZ=" + accelZ;

    http.begin(url);
    int httpResponseCode = http.GET();

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);
      Serial.println(response);
    } else {
      Serial.print("Error on sending GET: ");
      Serial.println(httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("WiFi not connected");
  }
}