#include <ESP32Servo.h>

Servo myservo;

#define ir_enter 4
#define ir_exit 2

int total_slots = 5;
int occupied_slots = 0;
bool car_inside = false; 

void setup() {
  Serial.begin(9600);

  pinMode(ir_enter, INPUT);
  pinMode(ir_exit, INPUT);

  myservo.attach(5);
  myservo.write(0); 
}

void loop() {

  if (!car_inside && digitalRead(ir_enter) == HIGH && occupied_slots < total_slots) { 
    car_inside = true; 
    occupied_slots++;
    Serial.println("Car entered parking.");
    myservo.write(90); 
    delay(1000); 
  }

  if (car_inside && digitalRead(ir_exit) == HIGH && occupied_slots > 0) { 
    occupied_slots--;
    Serial.println("Car exited parking.");
    myservo.write(0); 
    delay(1000); 
    car_inside = false; 
  }

  if(occupied_slots == total_slots){
    Serial.println("PARKING FULL !");
  }
  
  Serial.print("Occupied slots: ");
  Serial.println(occupied_slots);
  Serial.print("Vacant slots: ");
  Serial.println(total_slots - occupied_slots);

  delay(1000); 
}