#include <Servo.h>

const int pirPin = 2;
const int ldrPin = A0;
const int ledPin = 13;
const int buzzerPin = 4;
const int servoPin = 9;

Servo myservo;
int pos = 0;
bool isServoOpen = false;

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(ldrPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  myservo.attach(servoPin);
  Serial.begin(9600);
}

void loop() {
  int pirState = digitalRead(pirPin);
  int ldrValue = analogRead(ldrPin);
  Serial.println(ldrValue);
  
  if (pirState == HIGH && ldrValue < 500) {
    digitalWrite(ledPin, HIGH);
    tone(buzzerPin, 1000);
    
    if (!isServoOpen) {
      updateServo(180);
      isServoOpen = true;
    }
    else {
      updateServo(0);
      isServoOpen = false;
    }
  }
  else {
    digitalWrite(ledPin, LOW);
    noTone(buzzerPin);
    if (isServoOpen) {
      updateServo(0);
      isServoOpen = false;
    }
  }
  delay(100);
}

void updateServo(int position) {
  for (pos = pos; pos <= position; pos += 1) {
    myservo.write(pos);
    delay(15);
  }
  for (pos = pos; pos >= position; pos -= 1) {
    myservo.write(pos);
    delay(15);
  }
}