#include <WiFi.h>
#include <ESP_Mail_Client.h>

//const char* ssid = "YourWiFiSSID";
//const char* password = "YourWiFiPassword";

/*const char* smtpServer = "smtp.example.com";
const int smtpPort = 587;
const char* smtpUsername = "[email protected]";
const char* smtpPassword = "your_email_password";
*/
const int TRIG_PIN = 4;
const int ECHO_PIN = 2;
const int RELAY_PIN = 19;
const int LED_PIN = 5;

const long REPORT_INTERVAL_MS = 86400000;  // 24 hours in milliseconds

ESP_Mail_Client mailClient;

unsigned long lastReportTime = 0;

void setup() {
  Serial.begin(115200);

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  //connectToWiFi();
  //setupSMTP();
}

/*void loop() {
  unsigned long currentTime = millis();

  // Check if it's time to send a report
  if (currentTime - lastReportTime >= REPORT_INTERVAL_MS) {
    sendReport();
    lastReportTime = currentTime;
  }*/

  // Measure oil level
  float oilLevel = measureOilLevel();

  // Control relay and LED based on oil level
  if (oilLevel > 20) {
    digitalWrite(RELAY_PIN, HIGH); // Activate relay if oil level is sufficient
    digitalWrite(LED_PIN, HIGH);   // Turn on LED
  } else {
    digitalWrite(RELAY_PIN, LOW);  // Deactivate relay if oil level is low
    digitalWrite(LED_PIN, LOW);    // Turn off LED
  }

  delay(1000);
}

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

float measureOilLevel() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  float duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  return distance;
}

/*void setupSMTP() {
  // Initialize the mail client
  mailClient.init(smtpServer, smtpPort, smtpUsername, smtpPassword);
}

void sendReport() {
  Serial.println("Sending report...");

  String report = "Oil Level Report\n";
  report += "Oil Level: " + String(measureOilLevel()) + " cm\n";

  String subject = "Oil Level Report";

  // Send email
  //mailClient.Send(subject.c_str(), report.c_str(), smtpUsername, "[email protected]");

  Serial.println("Email sent!");
}*/