#include <LiquidCrystal.h>
#include <Keypad.h>
// importing the needed librarys

const int rs = 13;
const int en = 12;
const int d4 = 11;
const int d5 = 10;
const int d6 = 9;
const int d7 = 8;
String greeting = "This is a";
String greeting2 = "security panel";
bool start = false;
String username = "";
String password = "";
bool user = true;
bool pass = false;

const uint8_t ROWS = 4;
const uint8_t COLS = 4;

// making a 2 dimension array (for why?)
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'},
};

struct Pair {

  const char* key;
  int value;
};

Pair dictionary[] = {

  {"ABC", 123},
  {"BCD", 456}
};

const int numPairs = sizeof(dictionary) / sizeof(dictionary[0]);

int getValue(const char* key) {

  for (int i = 0; i < numPairs; i++) {

    if (strcmp(dictionary[i].key, key) == 0) {
      return dictionary[i].value;
    }
  }
  return -1;
};

// Setting the pins of the columns and the rows
uint8_t colPins[COLS] = {3, 2, 1, 0};
uint8_t rowPins[ROWS] = {7, 6, 5, 4};

// Absolute no idea what is going on here :D
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
char key = keypad.getKey();

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void functions() {

  if (key == keys[3][3]) {

      lcd.clear();
      lcd.print("Username: ");
      lcd.setCursor(9, 0);
    }

    if (key == keys[3][0] && username.length() == 4) {

      lcd.setCursor(0, 1);
      lcd.print(("password: "));
      lcd.setCursor(9, 1);
      user = false;
      pass = true;
    }
}

void writing() {
  
    if (key != NO_KEY && key != keys[3][3] && key != keys[3][0]) {

      lcd.print(key);

      if (user) {
        username += key;
      }

      if (pass) {
        password += key;
      }
    }

    functions();

    if (key == NO_KEY) {

      lcd.print("");
    }

    if (username.length() == 4 && password.length() == 4) {

      lcd.clear();
      lcd.write("username", "password");
    }
}


void setup() {
  
  lcd.begin(16, 2);
  lcd.setCursor(3, 0);

  for (int i = 0; i < greeting.length(); i++) {

    lcd.print(greeting.charAt(i));
    delay(100);
  }

  lcd.setCursor(1, 1);

  for (int i = 0; i < greeting2.length(); i++) {

    lcd.print(greeting2.charAt(i));
    delay(100);
  }

  delay(1000);
  lcd.clear();
  lcd.print("Username: ");
  lcd.setCursor(9, 0);
}

void loop() {
  
  // Making a char variable and giving it a function output value
  writing();
}






/*
struct Pair {
  const char* key;
  int value;
};

Pair dictionary[] = {
  {"piros", 255},
  {"zöld", 128},
  {"kék", 64}
};
const int numPairs = sizeof(dictionary) / sizeof(dictionary[0]);

int getValue(const char* key) {
  for (int i = 0; i < numPairs; i++) {
    if (strcmp(dictionary[i].key, key) == 0) {
      return dictionary[i].value;
    }
  }
  return -1;
}

void setup() {
  Serial.begin(9600);
  Serial.println(getValue("piros")); // 255
}
void loop() {}

*/