#include <ESP32Servo.h>
#include <DHT.h>
#include <WiFi.h>

// **Define Pins**
#define PIR_PIN 4
#define ULTRASONIC_TRIG 5
#define ULTRASONIC_ECHO 18
#define LED_PIN 19
#define BUZZER_PIN 21
#define SERVO_PIN 22
#define MQ_SENSOR_PIN 34
#define DHT_PIN 23
#define RELAY_PIN 26  // For TV & AC Control
#define DHTTYPE DHT22

Servo doorServo;
DHT dht(DHT_PIN, DHTTYPE);

void setup() {
    Serial.begin(115200);
    
    pinMode(PIR_PIN, INPUT);
    pinMode(ULTRASONIC_TRIG, OUTPUT);
    pinMode(ULTRASONIC_ECHO, INPUT);
    pinMode(LED_PIN, OUTPUT);
    pinMode(BUZZER_PIN, OUTPUT);
    pinMode(RELAY_PIN, OUTPUT);
    
    doorServo.attach(SERVO_PIN);
    doorServo.write(0); // Door starts closed
    
    dht.begin();
    Serial.println("System Initialized...");
}

void loop() {
    int pirState = digitalRead(PIR_PIN);
    int smokeLevel = analogRead(MQ_SENSOR_PIN);
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    
    // ** Automatic Light & Fan Control**
    digitalWrite(LED_PIN, pirState ? HIGH : LOW);
    Serial.print("Motion Detected: ");
    Serial.println(pirState ? "Yes" : "No");

    // ** Automatic Door Opening with Ultrasonic**
    digitalWrite(ULTRASONIC_TRIG, LOW);
    delayMicroseconds(2);
    digitalWrite(ULTRASONIC_TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(ULTRASONIC_TRIG, LOW);
    
    long duration = pulseIn(ULTRASONIC_ECHO, HIGH, 30000); // Timeout after 30ms
    int distance = (duration > 0) ? (duration * 0.034 / 2) : 100; // Default to 100cm if timeout

    Serial.print("Ultrasonic Distance: ");
    Serial.print(distance);
    Serial.println(" cm");

    if (distance < 30) { // If object is close, open door
        Serial.println("Opening Door...");
        doorServo.write(90);
        delay(2000);
        Serial.println("Closing Door...");
        doorServo.write(0);
    }

    // **Cloth Protection using Weather Monitoring**
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");

    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.println(" °C");

    if (humidity > 85) {
        Serial.println("Rain Detected! Move Clothes Inside.");
    }

    // ** Smoke Detection & Alert**
    Serial.print("Smoke Level: ");
    Serial.println(smokeLevel);

    if (smokeLevel > 400) {
        digitalWrite(BUZZER_PIN, HIGH);
        Serial.println("🔥 Smoke Detected! Alert Sent.");
    } else {
        digitalWrite(BUZZER_PIN, LOW);
    }
    
    Serial.println("----------------------");
    delay(1000);
}