#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

#define PIN_ALCHOHOL 5
#define PIN_ACOMPANANTE1 4
#define PIN_ACOMPANANTE2 3
#define PIN_ACOMPANANTE3 2

struct PrintOptions {
  String toPrint;
  int pos;
};

const PrintOptions empty = {"", 0};

LiquidCrystal_I2C lcd(0x27, 20, 4);

const byte FILAS = 4;
const byte COLUMNAS = 4;

const char keys[FILAS][COLUMNAS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

const byte pinColumnas[COLUMNAS] = {22, 23, 24, 25};
const byte pinFilas[FILAS] = {26, 27, 28, 29};

Keypad keypad(makeKeymap(keys), pinFilas, pinColumnas, FILAS, COLUMNAS);

char tecla;
bool confirmacion=0;

void imprimirFila(byte posY, byte posX, String fila){
  if(fila != ""){
    byte caracteres_restantes = 20 - fila.length();

    if(caracteres_restantes<0){
      lcd.print("muy largo 1");
    }
  byte posicionX = posX == 'c'? (caracteres_restantes/2) : posX;
  lcd.setCursor(posicionX,posY);
  lcd.print(fila);

  }
}

void imprimir(PrintOptions fila1 = empty, PrintOptions fila2 = empty, PrintOptions fila3 = empty, PrintOptions fila4 = empty) {
  imprimirFila(0, fila1.pos, fila1.toPrint);
  imprimirFila(1, fila2.pos, fila2.toPrint);
  imprimirFila(2, fila3.pos, fila3.toPrint);
  imprimirFila(3, fila4.pos, fila4.toPrint);
}

void Barman (int delay_alchohol, int delay_acompanante1 , int delay_acompanante2, int delay_acompanante3){
      digitalWrite(PIN_ALCHOHOL,HIGH);
      delay(delay_alchohol);
      digitalWrite(PIN_ALCHOHOL,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE1,HIGH);
      delay(delay_acompanante1);
      digitalWrite(PIN_ACOMPANANTE1,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE2,HIGH);
      delay(delay_acompanante2);
      digitalWrite(PIN_ACOMPANANTE2,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE3,HIGH);
      delay(delay_acompanante3);
      digitalWrite(PIN_ACOMPANANTE3,LOW);
      delay(1000);
}

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  lcd.init();
  lcd.backlight();
}

void loop(){ 

  do{
    imprimir(
    { "Elija una bebida",  'c' },
    { "1-Fernet con Coca",  0  },
    { "2-Sex on the beach", 0  },
    { "3-Agua",             0  }
    );
    

    tecla=keypad.waitForKey();
    if(tecla=='1'){
      confirmacion=1;
    }
    else if(tecla=='2'||tecla=='3'){
      lcd.clear();
      imprimir(
      { "Bebida", 'c'},
      { "No Disponible", 'c'}
      );
      confirmacion=0;
      delay(1000);

    }
    else{
      lcd.clear();
      imprimir(
      { "elija un", 'c'},
      { "valor valido", 'c'}
      );
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

  do{
    lcd.clear();
    imprimir(
    { "Elija la intensidad", 'c'},
    { "1-Suave", 0},
    { "2-Medio", 0},
    { "3-Fuerte", 0}
    );
    tecla=keypad.waitForKey();
    if(tecla=='1'||tecla=='2'||tecla=='3'){
      confirmacion=1;
    }
    else{
      lcd.clear();
      imprimir(
      { "elija un", 'c'},
      { "valor valido", 'c'}
      );
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

  lcd.clear();
  imprimir(
    empty,
    { "preparando...", 'c'}
    );
  lcd.cursor();
  lcd.blink();
  
  if(confirmacion==1){
    int delay_alchohol;
    int delay_acompanante1;
    int delay_acompanante2;
    int delay_acompanante3;

    switch(tecla){
      case '1':{
      delay_alchohol = 2000;
      delay_acompanante1 = 4000;
      delay_acompanante2 = 4000;
      delay_acompanante3 = 4000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
      case '2':{
      delay_alchohol = 5000;
      delay_acompanante1 = 3000;
      delay_acompanante2 = 3000;
      delay_acompanante3 = 3000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
      case '3':
      {
      delay_alchohol = 8000;
      delay_acompanante1 = 2000;
      delay_acompanante2 = 2000;
      delay_acompanante3 = 2000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
    }
  }
  lcd.noCursor();
  lcd.noBlink();
}