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

// تنظیمات نمایشگر
LiquidCrystal_I2C lcd(0x27, 16, 2);

// تنظیمات کیپد
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] = {PA0, PA1, PA4, PA5}; 
byte colPins[COLS] = {PA6, PA7, PB0, PB1}; 

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

String secretCode = "1234"; 
String inputCode = "";

void setup() {
  lcd.init();
  lcd.backlight();
  myServo.attach(PA8);
  myServo.write(0); 
  
  lcd.print("System Ready");
  delay(1000);
  lcd.clear();
  lcd.print("Enter Password:");
}

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

  if (key) {
    if (key == '*') { // بررسی رمز
      if (inputCode == secretCode) {
        lcd.clear();
        lcd.print("Unlocked!");
        myServo.write(90); // چرخش موتور (باز شدن)
        delay(3000);
        myServo.write(0);  // بستن مجدد بعد از ۳ ثانیه
        lcd.clear();
        lcd.print("Enter Password:");
      } else {
        lcd.clear();
        lcd.print("Wrong Password!");
        delay(2000);
        lcd.clear();
        lcd.print("Enter Password:");
      }
      inputCode = "";
    } else if (key == '#') { // پاک کردن ورودی
      inputCode = "";
      lcd.setCursor(0, 1);
      lcd.print("                ");
    } else {
      inputCode += key;
      lcd.setCursor(inputCode.length() - 1, 1);
      lcd.print('*');
    }
  }
}