#define LCD_LEN 16
#define LCD_WID 2

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,LCD_LEN,LCD_WID);

#include <Keypad.h>

const uint8_t ROWS = 3;
const uint8_t COLS = 3;
char keys[ROWS][COLS] = {
  { '1', '2', '3' },
  { '4', '5', '6'  },
  { '7', '8', '9'  },

};

uint8_t colPins[COLS] = { 10, 9, 8 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 13, 12, 11 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

char name[8]{'Y','a','r','o','s','l','a','v'};
char age[] = "21";

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}

// void loop()
// {
//   for(int i=-5;i<5;i++)
//   {
//     move(i);
//   }
//   // Serial.println(which_key());
//   // delay(100);
//   //drow_setup();
// }

void loop() {
  my_mes("HELLO");
  delay(1000);
  my_mes("BYE");
  delay(1000);
  my_mes(name,1);
  delay(1000);
  my_mes(age, 0, 4);
  delay(1000);
  my_mes1("ABC",0,'m');
  delay(1000);

}

void my_mes(char*arr)
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(arr);
}
void my_mes(char*arr, unsigned short row)
{
  lcd.clear();
  lcd.setCursor(0,row);
  lcd.print(arr);
}

void my_mes(char*arr, unsigned short row, unsigned short colum)
{
  lcd.clear();
  lcd.setCursor(colum,row);
  lcd.print(arr);
}

void my_mes1(char*arr, unsigned short row, char pos)
{
  lcd.clear();
  short colum = 0;
  int len = sizeof(arr)/sizeof(arr[0])+1;
  switch (pos)
  {
    case 'l':
      my_mes(arr,row,colum);
      break;
    case 'r':
      colum = LCD_LEN - len;
      my_mes(arr,row,colum);
      break;
    case 'm':
      colum = (LCD_LEN - len)/2;
      my_mes(arr,row,colum);
      break;
    default:
      break;
   } 
  }

int which_key()
{
  char key = keypad.getKey();
  switch (key)
  {
    case '2':
      return 1;
    case '8':
      return -1;
    default:
      return 0;
  } 
}