#include <LiquidCrystal_I2C.h>

#include <Wire.h>

#include <Servo.h>

Servo myservo;

LiquidCrystal_I2C lcd(0x27, 16, 2);

int noOfSlot = 10;

int carInTransit = LOW;
int carInward = LOW;
int carOutard = LOW;
void setup()
{
    lcd.init();
    lcd.backlight();
    pinMode(2, INPUT);
    pinMode(3, INPUT);
    lcd.setCursor(0, 0);
    lcd.print("Smart Parking");
    myservo.attach(6);
}
void loop()
{
    delay(1000);
    int pinState2 = digitalRead(2);
    int pinState3 = digitalRead(3);
    if (carInTransit == LOW && pinState2 == HIGH )
    {
        carInTransit = HIGH;
        carInward = HIGH;
        // OPEN Gate
        myservo.write(90);
    }

    if (carInTransit == LOW && pinState3 == HIGH )
    {
        carInTransit = HIGH;
        carOutard = HIGH;
        // OPEN Gate
        myservo.write(90);
    }

    if (carInward == HIGH && pinState3 == LOW && pinState2 == LOW)
    {
        noOfSlot = noOfSlot - 1;
        carInTransit = LOW;
        carInward = LOW;
    }

    if (carOutard == HIGH && pinState2 == LOW && pinState3 == LOW)
    {
        noOfSlot = noOfSlot + 1;
        carInTransit = LOW;
        carOutard = LOW;
    }
    if (noOfSlot >= 10)
    {
        lcd.setCursor(0, 1);
        lcd.print("" + String(noOfSlot));
    }
    else
    {
        lcd.setCursor(0, 1);
        lcd.print("0" + String(noOfSlot));
    }

    if(carInTransit==LOW){
        myservo.write(0);
    }
}