#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Servo.h>

#define Password_Length 5
#define Max_Attempts 3
#define Buzzer_Pin 8 // Define buzzer pin as pin 8

Servo myservo;
LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);

int pos = 0;
char Data[Password_Length];
char Master[Password_Length] = "1234";
byte data_count = 0, master_count = 0;
byte attempts = 0; // Counter for wrong attempts

bool door = false;
char customKey;

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

byte rowPins[ROWS] = {0, 1, 2, 3};
byte colPins[COLS] = {4, 5, 6, 7};

Keypad customKeypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  pinMode(Buzzer_Pin, OUTPUT); // Set buzzer pin as output
  myservo.attach(9, 2000, 2400);
  ServoClose();
  lcd.begin(16, 2);
  lcd.print("Protected Door");
  loading("Loading");
  lcd.clear();
}

void loop() {
  if (door == true) {
    customKey = customKeypad.getKey();
    if (customKey == '#') {
      lcd.clear();
      ServoClose();
      lcd.print("Door is closed");
      delay(3000);
      door = false;
    }
  } else {
    Open();
  }
}

void loading (char msg[]) {
  lcd.setCursor(0, 1);
  lcd.print(msg);
  for (int i = 0; i < 9; i++) {
    delay(1000);
    lcd.print(".");
  }
}

void clearData() {
  while (data_count != 0) {
    Data[data_count--] = 0;
  }
  return;
}

void ServoClose() {
  for (pos = 90; pos >= 0; pos -= 10) {
    myservo.write(pos);
  }
}

void ServoOpen() {
  for (pos = 0; pos <= 90; pos += 10) {
    myservo.write(pos);
  }
}

void Open() {
  lcd.setCursor(0, 0);
  lcd.print("Enter Password");

  customKey = customKeypad.getKey();
  if (customKey) {
    Data[data_count] = customKey;
    lcd.setCursor(data_count, 1);
    lcd.print(Data[data_count]);
    data_count++;
  }

  if (data_count == Password_Length - 1) {
    if (!strcmp(Data, Master)) {
      lcd.clear();
      ServoOpen();
      lcd.print(" Door is Open ");
      door = true;
      delay(5000);
      loading("Waiting");
      lcd.clear();
      lcd.print(" Time is up! ");
      delay(1000);
      ServoClose();
      door = false;
    } else {
      lcd.clear();
      lcd.print(" Wrong Password ");
      attempts++;
      if (attempts >= Max_Attempts) {
        activateBuzzer();
        // Wait for 15 seconds
        delay(15000);
        // Reset attempts and clear LCD
        attempts = 0;
        lcd.clear();
      }
      delay(1000);
      lcd.clear();
    }
    clearData();
  }
}

void activateBuzzer() {
  digitalWrite(Buzzer_Pin, HIGH); // Turn on the buzzer
  delay(5000); // Bunyi buzzer selama 5 detik
  digitalWrite(Buzzer_Pin, LOW); // Turn off the buzzer
}