#include <LiquidCrystal_I2C.h>
#include <LiquidMenu.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

//Parametros Encoder
const int outputA = 7;    //CLK 
const int outputB = 6;    //DT
const int sw  = 4;      //SW

int aState;
int aLastState;  


int valor1 = 0;  //variable de valores
int valor2 = 0;
int valor3 = 0;

int incremento = 0;

int count = 0;
/*valor1 = analogRead(7)
valor2 = analogRead(6)    //mover al loop
valor3 = analogRead(3)*/
int Med_seleccionada;

//PANTALLA UNO
//LiquidLine linea1(1, 0, "    Bienvenido");
//LiquidLine linea2(1, 1, "Dispositivo de Med.");
//LiquidLine linea3(1, 2, " ");
//LiquidLine linea4(1, 3, "  CH4,  H2,  CO2");
//LiquidScreen pantalla1(linea1,linea2,linea3,linea4);

//PANTALLA 2 (MENU)
LiquidLine linea1_2(1, 0, "  Seleccionar Med.");
LiquidLine linea2_2(1, 1, "  CH4");
LiquidLine linea3_2(1, 2, "  H2");
LiquidLine linea4_2(1, 3, "  CO2");
LiquidScreen pantalla2(linea1_2,linea2_2,linea3_2,linea4_2);

//PANTALLAS 3 (Y SUS VARIACIONES)
LiquidLine linea1_3(1, 0, " ");
LiquidLine linea2_3(1, 1, "   CH4:", valor1, " ppm");
LiquidLine linea3_3(1, 2, " " );
LiquidLine linea4_3(1, 3, "Atras");
LiquidScreen pantalla3(linea1_3,linea2_3,linea3_3,linea4_3);

//PANTALLAS 3 (Y SUS VARIACIONES)
LiquidLine linea1_4(1, 0, " ");
LiquidLine linea2_4(1, 1, "    H2:", valor2, " ppm");
LiquidLine linea3_4(1, 2, " " );
LiquidLine linea4_4(1, 3, "Atras");
LiquidScreen pantalla4(linea1_4,linea2_4,linea3_4,linea4_4);

//PANTALLAS 3 (Y SUS VARIACIONES)
LiquidLine linea1_5(1, 0, " ");
LiquidLine linea2_5(1, 1, "   CO2:", valor3, " ppm");
LiquidLine linea3_5(1, 2, " " );
LiquidLine linea4_5(1, 3, "Atras");
LiquidScreen pantalla5(linea1_5,linea2_5,linea3_5,linea4_5);

LiquidMenu menu(lcd,pantalla2,pantalla3,pantalla4,pantalla5);

void setup(){

  pinMode(outputA, INPUT);
  pinMode(outputB, INPUT);

  
  pinMode(sw,INPUT_PULLUP);
  
 //lcd.init();
  lcd.init();
  lcd.backlight();

  menu.init();

  lcd.clear();

  fn_creditos();

  //linea1.set_focusPosition(Position::LEFT); 
  //linea2.set_focusPosition(Position::LEFT); 
 // linea3.set_focusPosition(Position::LEFT);
 // linea4.set_focusPosition(Position::LEFT);

  //linea1.attach_function(1, fn_vacio);
 // linea2.attach_function(1, fn_vacio);
//linea3.attach_function(1, fn_vacio);
 // linea4.attach_function(1, fn_vacio);

  //menu.add_screen(pantalla1);

  linea1_2.set_focusPosition(Position::LEFT);
  linea2_2.set_focusPosition(Position::LEFT); 
  linea3_2.set_focusPosition(Position::LEFT);
  linea4_2.set_focusPosition(Position::LEFT);
   
  linea1_2.attach_function(1, fn_vacio);
  linea2_2.attach_function(1, fn_sensor1);
  linea3_2.attach_function(1, fn_sensor2);
  linea4_2.attach_function(1, fn_sensor3);

  menu.add_screen(pantalla2);

  linea1_3.set_focusPosition(Position::LEFT); 
  linea2_3.set_focusPosition(Position::LEFT); 
  linea3_3.set_focusPosition(Position::LEFT); 
  linea4_3.set_focusPosition(Position::LEFT); 
   
  linea1_3.attach_function(1, fn_vacio);
  linea2_3.attach_function(1, fn_vacio);
  linea3_3.attach_function(1, fn_vacio);
  linea4_3.attach_function(1, fn_atras);

  menu.add_screen(pantalla3);

  linea1_4.set_focusPosition(Position::LEFT); 
  linea2_4.set_focusPosition(Position::LEFT); 
  linea3_4.set_focusPosition(Position::LEFT); 
  linea4_4.set_focusPosition(Position::LEFT); 
   
  linea1_4.attach_function(1, fn_vacio);
  linea2_4.attach_function(1, fn_vacio);
  linea3_4.attach_function(1, fn_vacio);
  linea4_4.attach_function(1, fn_atras);

  menu.add_screen(pantalla4);

  linea1_5.set_focusPosition(Position::LEFT); 
  linea2_5.set_focusPosition(Position::LEFT); 
  linea3_5.set_focusPosition(Position::LEFT); 
  linea4_5.set_focusPosition(Position::LEFT); 
   
  linea1_5.attach_function(1, fn_vacio);
  linea2_5.attach_function(1, fn_vacio);
  linea3_5.attach_function(1, fn_vacio);
  linea4_5.attach_function(1, fn_atras);

  menu.add_screen(pantalla5);

  //pantalla1.set_displayLineCount(4);
  pantalla2.set_displayLineCount(4);
  pantalla3.set_displayLineCount(4);
  pantalla4.set_displayLineCount(4);
  pantalla5.set_displayLineCount(4);

  menu.set_focusedLine(1);

  menu.update();
  
}

void loop(){


selectOption();

aState = digitalRead(outputA);

    if (aState != aLastState){     
      if (digitalRead(outputB) != aState){ 
        incremento++;
        if(incremento > 1){
          incremento = 0;
          menu.switch_focus(false);
        }
        
      }else{
        incremento++;
        if(incremento > 1){
          incremento = 0;
        menu.switch_focus(true);
        }
      }
      
      menu.update();
      aLastState = aState;
      
   }
   valor1++;
}

void selectOption(){
  if(digitalRead(sw) == LOW){
      menu.call_function(1);
      delay(500);
  }
}

void fn_sensor1(){
  menu.change_screen(2);
  menu.set_focusedLine(3);
  Med_seleccionada = 1;
}

void fn_sensor2(){
  menu.change_screen(3);
  menu.set_focusedLine(3);
  Med_seleccionada = 2;
}

void fn_sensor3(){
  menu.change_screen(4);
  menu.set_focusedLine(3);
  Med_seleccionada = 3; 

}

void fn_vacio(){
    return;
}

void fn_creditos(){

  lcd.setCursor(0, 0);
  lcd.print("    Bienvenido");
  lcd.setCursor(0, 1);
  lcd.print("Dispositivo de Med.");
  lcd.setCursor(0, 2);
  lcd.print(" ");
  lcd.setCursor(0, 3);
  lcd.print("  CH4,  H2,  CO2");
  
  delay(2000);

}

void fn_atras(){
  menu.change_screen(1);
  menu.set_focusedLine(1);
  Med_seleccionada = 1;
}