#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);


const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

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


String inputString;
String inputStored;
bool getCodeResults;


//sekcja diod LED i buzzera
#define LED_1 A0
#define LED_2 A1
#define LED_3 A2
#define LED_4 A3
#define buzzer 8 // buzzer zintegrowany z PCB i połaczony do pinu 8

void setup() {
  Serial.begin(9600);
  inputString.reserve(10); // maximum number of digit for a number is 10, change if needed
    // Init
  lcd.init();
  lcd.backlight();
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
  pinMode(A3, OUTPUT);
}

void loop() {
  char key = keypad.getKey();
  bool res = getGode();

  if (key) {


    if (key >= '0' && key <= '9') {     // only act on numeric keys
      inputString += key;               // append new character to input string
    } else if (key == '#') {   
      Serial.println("kod został odczytany");           // naciśnięcie # akceptuje wprowadzony kod
      if (inputString.length() > 0) {

        inputStored = inputString;      // przypisanie kodu do zmiennej
        inputString = "";               // wyzerowanie wprowdadzonego ciągu

        if(inputStored == "123456"){



          if(res){
            lcd.setCursor(3, 0);
            lcd.print("Kod jest OK");
            Serial.println("Kod jest OK");
            delay(1000);
            lcd.clear(); 
            Authorize(true);
          }



        }else{

          Serial.println("Kod jest do Dupy :)");
          Authorize(false);

        }
      }
    } else if (key == '*') {
      Serial.println("kod został wyczyszczony");            // naciśnięcie * kasuje wprowadzony kod
      inputString = "";                 // clear input
    }
  }
}

bool getGode()
{
  getCodeResults = true;

  return getCodeResults;

}


void Authorize(int unblock){
  if(unblock>0){
      Serial.println("Autoryzacja ");
      Serial.println();
      digitalWrite(LED_1, HIGH);
      delay(500);
      digitalWrite(LED_2, HIGH);
      delay(500);
      digitalWrite(LED_3, HIGH);
      delay(500);
      digitalWrite(LED_4, HIGH);
      delay(500);
      tone(buzzer, 4300);
      delay(50);
      tone(buzzer, 3300);
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
      noTone(buzzer);
      delay(500);
      lcd.clear();
      lcd.print("Weryfikacja");
      delay(1000);
      lcd.clear();
    }

    else{
      Serial.println("brak autoryzacji");
      Serial.println();
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, HIGH);
      tone(buzzer, 5300);
      delay(1000);
      tone(buzzer, 2300);
      delay(90);
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
      noTone(buzzer);
      delay(1000);
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, HIGH);
      tone(buzzer, 5300);
      delay(50);
      tone(buzzer, 2300);
      delay(90);
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
      noTone(buzzer);
      delay(1000);
      digitalWrite(LED_1, HIGH);
      digitalWrite(LED_2, HIGH);
      digitalWrite(LED_3, HIGH);
      digitalWrite(LED_4, HIGH);
      tone(buzzer, 5300);
      delay(50);
      tone(buzzer, 2300);
      delay(900);
      digitalWrite(LED_1, LOW);
      digitalWrite(LED_2, LOW);
      digitalWrite(LED_3, LOW);
      digitalWrite(LED_4, LOW);
      noTone(buzzer);
      delay(5000);
    }
}