#include <Servo.h>
Servo myservoA;
Servo myservoB;
Servo myservoC;
#include  <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define Sensor 2
#define LEDA 3
#define LEDB 4
#define Buzz 5
#define coinDetector 6
#define SWA A3
#define SWB A2
#define SWC A1

int servostop = 90;
int servoplay = 180;
int coinCount = 10;
int buttonPressed;

void setup() {
  lcd.init();
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.print("     Hello  ");
  lcd.setCursor(0, 1);
  delay(2000);
  lcd.clear();
  lcd.print("  insert a coin ");
  lcd.setCursor(0, 1);
  delay(2000);


  pinMode(Sensor, INPUT);
  pinMode(LEDA, OUTPUT);
  pinMode(LEDB, OUTPUT);
  pinMode(Buzz, OUTPUT);
  pinMode(coinDetector, INPUT_PULLUP);
  pinMode(SWA, INPUT_PULLUP);
  pinMode(SWB, INPUT_PULLUP);
  pinMode(SWC, INPUT_PULLUP);
  myservoA.attach(7);
  myservoB.attach(8);
  myservoC.attach(9);
  
  myservoA.write(servostop);
  myservoB.write(servostop);
  myservoC.write(servostop);
  BuzzC();
  digitalWrite(LEDB, LOW);
}
void loop() {
    digitalWrite(LEDA, HIGH);
    while (true) {    
    if (digitalRead(coinDetector) == LOW) {
    delay(50);
    lcd.clear();
    lcd.print("Coins: ");
    lcd.print(coinCount);
    lcd.print("  Bath ");
    delay(2000);
    break;
    }
  }
  
  BuzzB();
  digitalWrite(LEDA, LOW);
  delay(200);
  digitalWrite(LEDA, HIGH);
  delay(200);
  digitalWrite(LEDA, LOW);
  delay(200);
  digitalWrite(LEDA, HIGH);
  delay(200);
  digitalWrite(LEDA, LOW);
  delay(200);
  digitalWrite(LEDA, HIGH);

  while (true) {
    if (digitalRead(SWA) == LOW) {
      lcd.clear();
      lcd.print(" lOADING......1  ");
      lcd.print(servoplay);
      delay(2000);

      buttonPressed = 1;
        BuzzA();
        digitalWrite(LEDA, LOW);
        digitalWrite(LEDB, HIGH);
      break;
    }
    if (digitalRead(SWB) == LOW) {
      lcd.clear();
      lcd.print(" lOADING......2 ");
      lcd.print(servoplay);
      delay(2000);
      
      buttonPressed = 2;
        BuzzA();
        digitalWrite(LEDA, LOW);
        digitalWrite(LEDB, HIGH);
      break;
    }
    if (digitalRead(SWC) == LOW) {
      lcd.clear();
      lcd.print(" lOADING......3  ");
      lcd.print(servoplay);
      delay(2000);

      buttonPressed = 3;
        BuzzA();
        digitalWrite(LEDA, LOW);
        digitalWrite(LEDB, HIGH);
      break;
    }
  }
    switch (buttonPressed) {
      
    case 1:
      myservoA.write(servoplay);
      break;
    case 2:
      myservoB.write(servoplay);
      break;
    case 3:
      myservoC.write(servoplay);
      break;
   }   
   
    while (true) {
    if (digitalRead(Sensor) == LOW) {
      myservoA.write(servostop);
      myservoB.write(servostop);
      myservoC.write(servostop);
      BuzzC();
      break;
    }
  }
    while (true) {
    if (digitalRead(Sensor) == HIGH) {
      lcd.clear();
      lcd.print(" Please pick up  ");
      lcd.print(Sensor);
      delay(10000);
      lcd.clear();
      lcd.print("   THANK YOU     ");
      lcd.print(Sensor);
      delay(5000);
      lcd.clear();
      lcd.print("     Hello  ");

      digitalWrite(LEDB, LOW);
      break;
    }
  }  
}
void BuzzA()
{
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);
}
void BuzzB()
{
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);
  delay(50);
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);  
}
void BuzzC()
{
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);
  delay(50);
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);  
  delay(50);
  digitalWrite(Buzz, HIGH);
  delay(50);
  digitalWrite(Buzz, LOW);
}