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



// -------------------- Pin Definitions --------------------
#define DHTPIN 14
#define DHTTYPE DHT22
#define PIR_PIN 27
#define LDR_PIN 34
#define SERVO_PIN 25
#define RED_LED 26
#define BLUE_LED 33
#define PINK_LED 32
#define BUZZER 23
#define DOORBELL_BTN 18
#define SECURITY_BTN 19

// -------------------- Objects --------------------
DHT dht(DHTPIN, DHTTYPE);
Servo doorServo;

bool securityMode = false;

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

  // Initialize sensors and actuators
  dht.begin();
  doorServo.attach(SERVO_PIN);

  pinMode(PIR_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);

  pinMode(RED_LED, OUTPUT);
  pinMode(BLUE_LED, OUTPUT);
  pinMode(PINK_LED, OUTPUT);
  pinMode(BUZZER, OUTPUT);

  pinMode(DOORBELL_BTN, INPUT_PULLUP);
  pinMode(SECURITY_BTN, INPUT_PULLUP);

  doorServo.write(0); // keep door closed initially
}

void loop() {
  // ----------- Read Sensors -----------
  float temp = dht.readTemperature();
  int ldrValue = digitalRead(LDR_PIN); // HIGH = bright, LOW = dark
  bool motion = digitalRead(PIR_PIN);
  bool doorbellPressed = (digitalRead(DOORBELL_BTN) == LOW);
  bool securityPressed = (digitalRead(SECURITY_BTN) == LOW);

  // ----------- 1. Temperature-based Fan Control -----------
  if (!isnan(temp)) {
    if (temp > 30) {
      digitalWrite(BLUE_LED, HIGH);       // Fan ON (blue LED)
      tone(BUZZER, 1000, 2000);           // Buzz for 2 sec
      Serial.println("Temperature high! Fan ON.");
    } else {
      digitalWrite(BLUE_LED, LOW);        // Fan OFF
    }
  }

  // ----------- 2. Automatic Lighting -----------
  if (ldrValue == LOW) { // dark
    digitalWrite(BLUE_LED, HIGH);
    Serial.println("Dark detected, light ON.");
  } else {
    digitalWrite(BLUE_LED, LOW);
  }

  // ----------- 3. Intruder Alert -----------
  if (motion && securityMode) {
    digitalWrite(RED_LED, HIGH);
    tone(BUZZER, 1500, 1000);
    Serial.println("Intruder detected! Security alert!");
    delay(500);
    digitalWrite(RED_LED, LOW);
  }

  // ----------- 4. Smart Door Control -----------
  if (doorbellPressed) {
    Serial.println("Doorbell pressed! Opening door...");
    doorServo.write(90);   // open
    digitalWrite(PINK_LED, HIGH); // welcome light
    delay(1000);
    digitalWrite(PINK_LED, LOW);
    doorServo.write(0);    // close
  }

  // ----------- 5. Security Mode Toggle -----------
  if (securityPressed) {
    securityMode = !securityMode;
    Serial.println(securityMode ? "Security Mode ON" : "Security Mode OFF");
    delay(500); // debounce
  }

  delay(100);
}