#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 10, d5 = 9, d6 = 8, d7 = 7;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int k1 = 6, k2 = 5, k3 = 4;
int flag = 0, q = 1, k = 0, p = 1, g = 1;
static int a = 0, j = 0, b,num=0,num2=0;
String ice = "Ice Cream",milk = "Milk Shake",meal="Meal",desert="Desert",rice="Fried Rice",chicken = "Chicken",value="rice";

class Button{
  int buttonState;        // Current state of the button
  int lastButtonState;    // Previous state of the button
  int buttonState_1;        // Current state of the button
  int lastButtonState_1;    // Previous state of the button
  bool outputState;      // Current state of the output (OFF by default)
  int buttonPin,counter=0; 
  public:
  Button(int pin){
    buttonPin = pin;       // Pin connected to the button
    buttonState = HIGH;        // Current state of the button
    lastButtonState = HIGH;    // Previous state of the button
    outputState = false;      // Current state of the output (OFF by default)
    pinMode(buttonPin, INPUT);  // Set buttonPin as input with internal pull-up resistor
  }
  bool longPress(){
  int count = 0;int x=1;
  while(!digitalRead(k3)){
    count++;
    delay(100);
    Serial.println(count); 
    if(count>12){  
      j=1;
      if(x==1) {lcd.clear();x=0;}
      lcd.setCursor(3, 0);lcd.print("Confirmed ???");
      lcd.setCursor(3, 1);lcd.print("Yes");
      lcd.setCursor(12, 1);lcd.print("No");
      lcd.setCursor(0, 1);lcd.print("=>");
    }
  }
  return j;
  }
  int onPress(){
    buttonState_1 = digitalRead(buttonPin);
    if (buttonState_1 == HIGH && lastButtonState_1 == LOW) {
      counter++;
      delay(100);
    }
    lastButtonState_1 = buttonState_1;
    counter = counter % 2;
    return counter;
    }

  bool press() {
    buttonState = digitalRead(buttonPin);
    if (buttonState != lastButtonState) {     
      delay(50);
      if (buttonState == LOW) {
      outputState = true;a=1;delay(200);
      return 1;
    }
  }return 0;
  lastButtonState = buttonState;
  }   
};
void display_1(String a, String b){
    lcd.setCursor(3, 0);lcd.print("1) ");lcd.print(a);
    lcd.setCursor(3, 1);lcd.print("2) ");lcd.print(b);
}
void display_2(int x,int flag){
  int i,j,k,l;
  if(flag){
      i=0,j=1,k=9,l=1;
  }
  else{
      i=0,j=0,k=0,l=1;
  }
  if(x){
      lcd.setCursor(i, j);
      lcd.print("  ");
      lcd.setCursor(k, l);
      lcd.print("=>");
  }
  else{
    lcd.setCursor(k, l);
    lcd.print("  ");
    lcd.setCursor(i, j);
    lcd.print("=>");
  }
}
void confirm(Button c,int bPress){
  int cPress = c.onPress();
            cPress = c.press();Serial.print(cPress);
            if( !bPress && cPress ){
            k = 1;
            while ( k == 1) {
              delay( 200 );
              if(q == 1 ) { lcd.clear(); q=0;}
              lcd.setCursor(0, 1);lcd.print("Order Confirmed");
              lcd.setCursor(3, 0);lcd.print(value);
            }
          }
          else if( bPress && cPress ){k = 2;
            while(k==2) {
              delay(200);
              if(p == 1) {lcd.clear(); p = 0;}
              lcd.setCursor(0, 1);lcd.print("Order Canceled:)");//Serial.print("Order Canceled:)");Serial.print(num);Serial.print("   ");
              
            }
          }
}
void save(int a,int b){
       if (a==0 && b==1) value = rice;
  else if (a==1 && b==1) value = chicken;
  else if (a==0 && b==2) value = ice;
  else if (a==1 && b==2) value = milk;
}
void setup() {int pwm = 150;
    Serial.begin(9600); lcd.begin(16, 2);int x=1,pwmValue;
    Button a(k1), b(k2), c(k3), d(k1), e(k2), f(k3);
    while( 1 ) { 
      if(a.onPress()==0){
        if(x==1){lcd.clear();x=0;}
        lcd.setCursor(3,0); 
        lcd.print("PWM: ");
        lcd.print(pwm);
       
      }
      else{
        if(x==0){lcd.clear();x=1;}
        lcd.setCursor(3,0); 
        lcd.print("InPut Mode");
        lcd.setCursor(7,1); 
        lcd.print(pwm);
        if(b.press() == 1) {
          pwm -= 10;
          if(pwm < 20) pwm = 0;
        }
        if(c.press() == 1) {
          pwm += 10;
          if(pwm > 0 && pwm < 20) 
            pwm += 10;
          if(pwm > 250) pwm = 250;
        }
        if(pwm <100 && pwm >=20){
          lcd.setCursor(9,1); 
          lcd.print(" ");
        }
        if(pwm == 0){
          lcd.setCursor(8,1); 
          lcd.print("  ");
        }
        
      }
    }  
  }
void loop(){ 
}