#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

//--- variables for pins name
int left  = A0;
int right = A1;
int val = 4;

byte empty[8] = { B11111, B00000, B00000, B00000, B00000, B00000, B00000, B11111 };
byte half[8] = { B11111, B00000, B11000, B11000, B11000, B11000, B00000, B11111 };
byte full[8] = { B11111, B00000, B11011, B11011, B11011, B11011, B00000, B11111 };
byte cup_left[8] = { B01111, B01000, B01000, B01000, B01000, B00100, B11111, B01111 };
byte cup_right[8] = { B11100, B00110, B00101, B00101, B00110, B01000, B11111, B11110 };
byte warning[] = { B00100, B01110, B01010, B11111, B11011, B11011, B11111, B00000 };
byte locked[] = { B00000, B01110, B10001, B10001, B11111, B11011, B11011, B11111 };
byte unlock[] = { B01110, B10001, B10001, B00001, B11111, B11011, B11011, B11111 };


void setup()
{
  pinMode(left,  INPUT_PULLUP);
  pinMode(right, INPUT_PULLUP);

  lcd.init();                       // initialize the 16x2 lcd module
  lcd.createChar(0, empty);
  lcd.createChar(1, half);
  lcd.createChar(2, full);
  lcd.createChar(3, cup_right);
  lcd.createChar(4, cup_left);
  lcd.createChar(5, warning);
  lcd.createChar(6, locked);
  lcd.createChar(7, unlock);

  lcd.backlight();                  // enable backlight for the LCD module
}


void loop()
{
  //load_animation(5, 1);
  //num_animation(17, 1);
  //cup_animation(0, 1);
  //warning_animation(0, 1);
  //locked_animation(0, 1);
  //unlocked_animation(0, 1);

}

//--- locked animation with line location (5, 1) ---//
void locked_animation(int location, int line){
  lcd.setCursor(location, line);
  lcd.write(byte(7));
  delay(200);
  lcd.setCursor(location, line);
  lcd.write(byte(6));
}

//--- unlocked animation with line location (5, 1) ---//
void unlocked_animation(int location, int line){
  lcd.setCursor(location, line);
  lcd.write(byte(6));
  delay(200);
  lcd.setCursor(location, line);
  lcd.write(byte(7)); 
}

//--- warning animation with line location (5, 1) ---//
void warning_animation(int location, int line){
  lcd.setCursor(location, line);
  lcd.write(byte(5)); 
}

//--- cup animation with line location (5, 1) ---//
void cup_animation(int location, int line){
  int location_next = location + 1;
  lcd.setCursor(location, line);
  lcd.write(byte(4));
  lcd.setCursor(location_next, line);
  lcd.write(byte(3));
}

//--- Loading animation with time (sec) ---//
void load_animation( int loading_time, int line) {
  loading_time = (loading_time * 1000) / 32;
  for (int i = 0; 16 > i; i++) {
    lcd.setCursor(i, line);
    lcd.write(0);
    delay(100);
  }
  for (int i = 0; 16 > i; i++) {
    lcd.setCursor(i, line);
    lcd.write(1);
    delay(loading_time);
    lcd.setCursor(i, line);
    lcd.write(2);
    delay(loading_time);
  }
}

//--- lavel animation with value (1 to 32) ---//
void num_animation(int line, int num) {
  for (int i = 0; 16 > i; i++) {
    lcd.setCursor(i, line);
    lcd.write(0);
  }
  int remainder = num % 2;
  if (remainder == 0) { //if num is even
    int dot = num / 2;
    for (int i = 0; dot > i; i++) {
      lcd.setCursor(i, line);
      lcd.write(1);
      lcd.setCursor(i, line);
      lcd.write(2);
    }
  }
  else if (remainder == 1) { //if num is not even
    num = num - 1;
    int dot = num / 2;
    for (int i = 0; dot > i; i++) {
      lcd.setCursor(i, line);
      lcd.write(1);
      lcd.setCursor(i, line);
      lcd.write(2);
    }
    lcd.setCursor(dot, line);
    lcd.write(1);
  }
}