#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// String *contact = (int *)malloc(0 * sizeof(int));

String functions[4] = {"Add Contect", "View Contects", "Delete Contect"};

// byte Add[8] = {
//   B01110,
//   B01110,
//   B11111,
//   B11111,
//   B11111,
//   B11111,
//   B01110,
//   B01110
// };

// byte view[8] = {
//   B00000,
//   B00000,
//   B01010,
//   B00000,
//   B10001,
//   B01110,
//   B00000,
//   B00000
// };

// byte del[8] = {
//   B00100,
//   B11111,
//   B11111,
//   B01110,
//   B01110,
//   B01110,
//   B01110,
//   B00000
// };

String label[5] = {"Contect Setting","Add Contect", "View Contects", "Delete Contect"};

String val[4] = {"HARIHARAN", "9876543109", "1", "A+"};

String contect[10] ;

//String *number = (char*)malloc(1 * sizeof(char));

uint8_t arrow[8] = {
  0x00,
  0x04,
  0x06,
  0x1F,
  0x1F,
  0x06,
  0x04,
  0x00
};

byte circule[8] = {
  B00000,
  B00000,
  B00100,
  B01110,
  B11111,
  B01110,
  B00100,
  B00000
};

int index = 0;

int vert, horz ;

int home(int custom_char, int cursor_col, int cursor_row, int label_row1, int label_row2)
{
  lcd.clear();
  lcd.setCursor(cursor_col, cursor_row);
  lcd.write(byte(custom_char));
  lcd.setCursor(1, 0);
  lcd.print(label[label_row1]);
  lcd.setCursor(1, 1);
  lcd.print(label[label_row2]);
}

int setindex(int indx)
{
  if (index == 0 )
  {
    home(1, 0, 0, index, index + 1);
  }
  if (index == 1)
  {
    home(0, 0, 1, index - 1, index);
  }
  if (index == 2)
  {
    home(0, 0, 0, index, index + 1);
  }
  if (index == 3)
  {
    home(0, 0, 1, index - 1, index);
  }
}

void setup() {
  lcd.createChar(0, arrow);
  lcd.createChar(1, circule);
  lcd.begin(16, 2);
  Serial.begin(115200);
  pinMode(7, INPUT_PULLUP);
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);

}
void loop() {

  vert = analogRead(A0);
  horz = analogRead(A1);

  //Serial.println(vert);

  if (index == 0 ) {
    setindex(index);
    do{
      vert = analogRead(A0);
      // horz = analogRead(A1);
    }while(vert == 512);
  }

  if (vert == 1023 && index > 0)
  {
    index--;
    setindex(index);
    Serial.println(index);
  }

  if (vert == 0 &&  index < (sizeof(label)/sizeof(int)))
  {
    index++;
    setindex(index);
    Serial.println(index);
  }

  if (horz == 1023)
  {
    setindex(index);
  }

  if (horz == 0)
  {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(val[index]);
  }

  if(digitalRead(7) == LOW)
  {
    if(index == 1)
    {
      Serial.println("Add Contect");
      Serial.println("Enter a Name");
      if (Serial.available() > 0) {
        contect[0] = Serial.readString();

        Serial.print("Recived String");
        Serial.println(contect[0]);
      }


    }
    if(index == 2)
    {
      lcd.clear();
      lcd.print(contect[0]);
    }
  }

  delay(100);

}