#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include<Servo.h>
Servo Myservo;
int IRSensor_1 = 4,IRSensor_2 = 5,IRSensor_3 = 6; // connect IR sensor DO to arduino pin 2
int led_1 = 8,led_2=9,led_3=10; // connect LED to arduino pin 13 or monitor inbuilt LED
int c1 = 0,c2=0,c3=0;
int park_1=0,park_2=0,park_3=0;
int but1=2,but2=7,but3=11,con_but = 3;
int srvo = 12;
int con_flag = 0 , cb = 0;

LiquidCrystal_I2C lcd(0x27,20,4);
void setup()
{
 pinMode(IRSensor_1, INPUT); // sensor pin INPUT
 pinMode(IRSensor_2, INPUT); // sensor pin INPUT
 pinMode(IRSensor_3, INPUT); // sensor pin INPUT
 pinMode(but1, INPUT);
 pinMode(but2, INPUT);
 pinMode(but3, INPUT);
 pinMode(con_but, INPUT);
 pinMode(led_1, OUTPUT); // LED pin OUTPUT
 pinMode(led_2, OUTPUT); // LED pin OUTPUT
 pinMode(led_3, OUTPUT); // LED pin OUTPUT

 Myservo.attach(srvo); // Initiate Servo motor
 
 lcd.init(); //initailize the LCD
 lcd.backlight();
 lcd.print("Car Parking");
 delay(2000);
 lcd.clear();
 lcd.print("Total car parked");
 lcd.setCursor(0,1);
 lcd.print("today");
 delay(2000);
 lcd.clear();

 Serial.begin(9600);
}
void loop(){
  int statusSensor_1 = digitalRead(IRSensor_1);
  int statusSensor_2 = digitalRead(IRSensor_2);
  int statusSensor_3 = digitalRead(IRSensor_3);

  //Select the slot
  int b1 = digitalRead(but1);
  int b2 = digitalRead(but2);
  int b3 = digitalRead(but3);

  //For parking slot - 1
  if (statusSensor_1 == 0 && park_1 ==0){
    c1 +=1;
    park_1 = 1; 
  }
  else if (statusSensor_1 == 1) {
    park_1 =0;
    digitalWrite(led_1, LOW);
    }
  //For parking slot - 2
  if (statusSensor_2 == 0 && park_2 ==0){
    c1 +=1;
    park_2 = 1; 
  }
  else if (statusSensor_2 == 1) {
    park_2 =0;
    digitalWrite(led_2, LOW);
    }
  //For parking slot - 3
  if (statusSensor_3 == 0 && park_3 ==0){
    c1 +=1;
    park_3 = 1; 
  }
  else if (statusSensor_3 == 1) {
    park_3 =0;
    digitalWrite(led_3, LOW);
    }

  //For the LED indication
  if (park_1 == 1){
    digitalWrite(led_1, HIGH);
  }
  if (park_2 == 1){
    digitalWrite(led_2, HIGH);
  }
  if (park_3 == 1){
    digitalWrite(led_3, HIGH);
  }
  lcd.setCursor(0,0);
  lcd.print("Total cars : ");
  lcd.setCursor(13,0);
  lcd.print(c1+c2+c3);
  lcd.setCursor(0,1);
  lcd.print("Slot : ");
  lcd.setCursor(8,1);
  if (park_1 == 1){lcd.print(0);}else{lcd.print(1);}
  lcd.setCursor(10,1);
  if (park_2 == 1){lcd.print(0);}else{lcd.print(2);}
  lcd.setCursor(12,1);
  if (park_3 == 1){lcd.print(0);}else{lcd.print(3);}

  if (b1==0 && b2==0 && b3==0){
    lcd.setCursor(0,2);
    lcd.print("Press the button");
  }
  else if(park_1 == 0 || park_2 == 0 ||park_3 == 0){
    if (park_1 == 0 && b1 == 1 && con_flag ==0){
      lcd.setCursor(0,2);
      lcd.print("Price : Rs.50");
      con_flag = 1;
    }
    else if (con_flag == 0){
      lcd.setCursor(0,2);
      lcd.print("Slot unavailable");
      con_flag = 0;
    }

    if (park_2 == 0 && b2 == 1 && con_flag ==0){
      lcd.setCursor(0,2);
      lcd.print("Price : Rs.50");
      con_flag = 1;
    }
    else if (con_flag == 0){
      lcd.setCursor(0,2);
      lcd.print("Slot unavailable");
      con_flag = 0;
    }

    if (park_3 == 0 && b3 == 1 && con_flag ==0){
      lcd.setCursor(0,2);
      lcd.print("Price : Rs.50");
      con_flag = 1;
    }
    else if (con_flag == 0){
      lcd.setCursor(0,2);
      lcd.print("Slot unavailable");
      con_flag = 0;
    }
    Serial.println(cb);
    if (con_flag == 1){
      int i =0;
      while (cb !=1 && i<250){
        cb = digitalRead(con_but);
        i = i+1;
      }
    }
    Serial.println(cb);
    if (cb == 1 && con_flag == 1){
      Myservo.write(0);
      delay(5000);
      Myservo.write(90);
      delay(5000);
      con_flag = 0;
      cb = 0;
      }  
    }
  else{
    lcd.setCursor(0,2);
    lcd.print("parking unavailable");
    con_flag = 0;
    delay(5000);
  }
  lcd.setCursor(0,0);
  //lcd.print("Press the button");
  //lcd.setCursor(0,0);
}