#define BLYNK_TEMPLATE_ID "TMPL6hZwKMlI_"
#define BLYNK_TEMPLATE_NAME "RECYCLE VENDING MACHINE"
#define BLYNK_AUTH_TOKEN "Ma9MmO5q2aqjyn_hFRS8oJUcVJM44i2V"
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
#include <Wire.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define pushbutton  4,15,13,12
#define BUZZER  25

LiquidCrystal_I2C lcd(0x27,20,4);
Servo myservo; 
int servoPin = 33;
int checkbalance = 0;
String DATA = "";
String content = "";
float total = 0;
int flag1 = 0;
int flag2 = 0;
int flag3 = 0;
int flag4 = 0;
int flag5 = 0;
int MODE  = 0;
int count = 0;
int noty1 = 0;
int noty2 = 0;

void setup() {
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  pinMode(4,INPUT_PULLUP);
  pinMode(15,INPUT_PULLUP);
  pinMode(14,INPUT);
  pinMode(26,INPUT);
  pinMode(13,INPUT_PULLUP);
  pinMode(12,INPUT_PULLUP);
  pinMode(BUZZER,OUTPUT);
  myservo.setPeriodHertz(50); 
  myservo.attach(servoPin);
  digitalWrite(BUZZER,LOW);
  myservo.write(90);
  delay(1000);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("  RECYCLE VENDING  ");
  lcd.setCursor(0,1);
  lcd.print("      MACHINE      ");
}

void loop() 
{
  Blynk.run();
  int NONMETAL   = digitalRead(15);
  int METAL      = digitalRead(4);
  int IRNONMETAL = digitalRead(14);
  int IRMETAL    = digitalRead(26);
  Serial.print("IR NON METAL:" + String(IRNONMETAL) + " - IR METAL:" + String(IRMETAL) + " ");
  Serial.println("NON METAL:" + String(NONMETAL) + " - METAL:" + String(METAL) + " ");
  if(IRNONMETAL == 0 && noty1 == 0){
    noty1 = 1;
    Blynk.logEvent("noty", "BOTTLE BASKET IS FULL");
  }
  else if(IRNONMETAL == 1 && noty1 == 1){
    noty1 = 0;
  }
  if(IRMETAL == 0 && noty2 == 0){
    noty2 = 1;
    Blynk.logEvent("noty", "CAN BASKET IS FULL");
  }
  else if(IRMETAL == 1 && noty2 == 1){
    noty2 = 0;
  }

 if(digitalRead(13) == LOW && flag2 == 0){
    while(digitalRead(13) == LOW){
      
    }
    flag2 = 1;
    MODE = 1;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print(" PLEASE ENTER ITEM ");
  }
  else if(digitalRead(13) == LOW && flag2 == 1){
    while(digitalRead(13) == LOW){
      
    }
    flag2 = 0;
    MODE = 0;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("                   ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
  }

 if(digitalRead(15) == LOW && flag1 == 0){
    while(digitalRead(15) == LOW){
      
    }
    flag1 = 1;
    MODE = 1;
    delay(1000);
    total = total + 0.30;
    lcd.setCursor(0,3);
    lcd.print(" CAN        ");
    lcd.setCursor(10,3);
    lcd.print("T:RM" + String(total) + " ");
    myservo.write(0); 
      delay(1000);
      delay(3000);
      myservo.write(90); 
      delay(1000);
  }
  else if(digitalRead(15) == LOW && flag1 == 1){
    while(digitalRead(15) == LOW){
      
    }
    flag1 = 0;
    MODE = 0;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("                   ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
  }

  if(digitalRead(4) == LOW && flag3 == 0){
    while(digitalRead(4) == LOW){
      
    }
    flag3 = 1;
    MODE = 1;
    delay(1000);
    total = total + 0.20;
      lcd.setCursor(0,3);
      lcd.print(" BOTTLE    ");
      lcd.setCursor(10,3);
      lcd.print("T:RM" + String(total) + " ");
      myservo.write(180); 
      delay(1000);
      delay(3000);
      myservo.write(90); 
      delay(1000);
  }
  else if(digitalRead(4) == LOW && flag3 == 1){
    while(digitalRead(4) == LOW){
      
    }
    flag3 = 0;
    MODE = 0;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("                   ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
  }

  if(digitalRead(13) == LOW && flag5 == 0){
    while(digitalRead(13) == LOW){
      
    }
    flag5 = 1;
    MODE = 1;
    delay(1000);
    lcd.setCursor(0, 2);
    lcd.print("   YOUR CARD ADDED    ");
    lcd.setCursor(0, 3);
    lcd.print("    TOTAL:RM" + String(total) + "    ");
    delay(3000);
    lcd.setCursor(0, 2);
    lcd.print("     THANK YOU    ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
    delay(2000);
    lcd.setCursor(0, 2);
    lcd.print("                  ");
    MODE = 0;
    checkbalance = 0;
  }
  else if(digitalRead(13) == LOW && flag5 == 1){
    while(digitalRead(13) == LOW){
      
    }
    flag5 = 0;
    MODE = 0;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("                   ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
  }


if(digitalRead(12) == LOW && flag4 == 0){
    while(digitalRead(12) == LOW){
      
    }
    flag4 = 1;
    MODE = 1;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("   CHECK BALANCE   ");
    lcd.setCursor(0,3);
    lcd.print("      RM:" + String(total) + "      ");
    delay(3000);
    lcd.setCursor(0,2);
    lcd.print("                  ");
    lcd.setCursor(0,3);
    lcd.print("                  ");
    checkbalance = 1;
  }
  else if(digitalRead(12) == LOW && flag4 == 1){
    while(digitalRead(12) == LOW){
      
    }
    flag4 = 0;
    MODE = 0;
    delay(1000);
    lcd.setCursor(0,2);
    lcd.print("                   ");
    lcd.setCursor(0,3);
    lcd.print("                   ");
  checkbalance = 0;
  }
}