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

#define Password_Length 5

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

int pos = 0;

char Data[Password_Length];
char Master[Password_Length] = "1234"; // Password default
char newPassword[Password_Length];
byte data_count = 0;

bool door = false;
char customKey;
const int RELAY_PIN = 13;

/*---preparing keypad---*/
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);

        /*--- Main Action ---*/
        void setup() {
          digitalWrite(RELAY_PIN, LOW);
            lcd.begin(16, 2);
              pinMode(RELAY_PIN, OUTPUT);
                digitalWrite(RELAY_PIN, HIGH);
                  lcd.print("Protected Door");
                    loading("Loading");
                      lcd.clear();
                      }

                      void loop() {
                        if (door == true) {
                            customKey = customKeypad.getKey();
                                if (customKey == '#') {
                                      lcd.clear();
                                            digitalWrite(RELAY_PIN, HIGH);
                                                  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;
                                                                                                  }
                                                                                                  }

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

                                                                                                        customKey = customKeypad.getKey();

                                                                                                          // Hapus satu digit jika tombol 'C' ditekan
                                                                                                            if (customKey == 'C' && data_count > 0) {
                                                                                                                data_count--; // Kurangi jumlah digit
                                                                                                                    lcd.setCursor(data_count, 1); // Geser kursor ke posisi digit terakhir
                                                                                                                        lcd.print(" "); // Hapus digit di layar
                                                                                                                            lcd.setCursor(data_count, 1); // Kembalikan kursor ke posisi terakhir
                                                                                                                              }

                                                                                                                                // Hapus semua digit jika tombol 'D' ditekan
                                                                                                                                  if (customKey == 'D') {
                                                                                                                                      clearData(); // Hapus semua digit
                                                                                                                                          lcd.setCursor(0, 1);
                                                                                                                                              lcd.print("                "); // Bersihkan baris kedua
                                                                                                                                                }

                                                                                                                                                  // Jika tombol yang ditekan adalah selain 'C' atau 'D', tambahkan ke password
                                                                                                                                                    if (customKey && customKey != 'C' && customKey != 'D') {
                                                                                                                                                        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();
                                                                                                                                                                                        digitalWrite(RELAY_PIN, LOW);
                                                                                                                                                                                              lcd.print(" Door is Open ");
                                                                                                                                                                                                    door = true;
                                                                                                                                                                                                          delay(5000);
                                                                                                                                                                                                                lcd.clear();
                                                                                                                                                                                                                      lcd.print("Change Pass? ");
                                                                                                                                                                                                                            lcd.setCursor(0, 1);
                                                                                                                                                                                                                                  lcd.print("A=Yes B=No");

                                                                                                                                                                                                                                        // Tunggu input pengguna
                                                                                                                                                                                                                                              while (true) {
                                                                                                                                                                                                                                                      customKey = customKeypad.getKey();
                                                                                                                                                                                                                                                              if (customKey == 'A') {
                                                                                                                                                                                                                                                                        ChangePassword(); // Panggil fungsi untuk mengganti password
                                                                                                                                                                                                                                                                                  LockDoorAndRestart(); // Kunci kembali pintu setelah mengganti password
                                                                                                                                                                                                                                                                                            break;
                                                                                                                                                                                                                                                                                                    } else if (customKey == 'B') {
                                                                                                                                                                                                                                                                                                              WaitAndLock(); // Tunggu beberapa saat sebelum pintu terkunci
                                                                                                                                                                                                                                                                                                                        break;
                                                                                                                                                                                                                                                                                                                                }
                                                                                                                                                                                                                                                                                                                                      }

                                                                                                                                                                                                                                                                                                                                            clearData();
                                                                                                                                                                                                                                                                                                                                                } else {
                                                                                                                                                                                                                                                                                                                                                      lcd.clear();
                                                                                                                                                                                                                                                                                                                                                            lcd.print(" Wrong Password ");
                                                                                                                                                                                                                                                                                                                                                                  delay(1000);
                                                                                                                                                                                                                                                                                                                                                                        lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                              clearData();
                                                                                                                                                                                                                                                                                                                                                                                  }
                                                                                                                                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                                                                                                                                    }

                                                                                                                                                                                                                                                                                                                                                                                    void ChangePassword() {
                                                                                                                                                                                                                                                                                                                                                                                      lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                        lcd.print("New Password:");
                                                                                                                                                                                                                                                                                                                                                                                          data_count = 0;

                                                                                                                                                                                                                                                                                                                                                                                            // Memasukkan password baru
                                                                                                                                                                                                                                                                                                                                                                                              while (data_count < Password_Length - 1) {
                                                                                                                                                                                                                                                                                                                                                                                                  customKey = customKeypad.getKey();
                                                                                                                                                                                                                                                                                                                                                                                                      if (customKey) {
                                                                                                                                                                                                                                                                                                                                                                                                            newPassword[data_count] = customKey;
                                                                                                                                                                                                                                                                                                                                                                                                                  lcd.setCursor(data_count, 1);
                                                                                                                                                                                                                                                                                                                                                                                                                        lcd.print(newPassword[data_count]);
                                                                                                                                                                                                                                                                                                                                                                                                                              data_count++;
                                                                                                                                                                                                                                                                                                                                                                                                                                  }
                                                                                                                                                                                                                                                                                                                                                                                                                                    }

                                                                                                                                                                                                                                                                                                                                                                                                                                      // Ganti password lama dengan yang baru
                                                                                                                                                                                                                                                                                                                                                                                                                                        strcpy(Master, newPassword);
                                                                                                                                                                                                                                                                                                                                                                                                                                          lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                            lcd.print("Pass Changed!");
                                                                                                                                                                                                                                                                                                                                                                                                                                              delay(2000);
                                                                                                                                                                                                                                                                                                                                                                                                                                                lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                }

                                                                                                                                                                                                                                                                                                                                                                                                                                                void LockDoorAndRestart() {
                                                                                                                                                                                                                                                                                                                                                                                                                                                  lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                    lcd.print("Door locked");
                                                                                                                                                                                                                                                                                                                                                                                                                                                      delay(2000);
                                                                                                                                                                                                                                                                                                                                                                                                                                                        digitalWrite(RELAY_PIN, HIGH); // Kunci pintu
                                                                                                                                                                                                                                                                                                                                                                                                                                                          door = false; // Reset status pintu ke kondisi terkunci
                                                                                                                                                                                                                                                                                                                                                                                                                                                            lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                              lcd.print("Enter Password"); // Kembali ke menu awal
                                                                                                                                                                                                                                                                                                                                                                                                                                                              }

                                                                                                                                                                                                                                                                                                                                                                                                                                                              void WaitAndLock() {
                                                                                                                                                                                                                                                                                                                                                                                                                                                                lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  lcd.print("Waiting...");
                                                                                                                                                                                                                                                                                                                                                                                                                                                                    delay(5000); // Tunggu beberapa detik
                                                                                                                                                                                                                                                                                                                                                                                                                                                                      lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        lcd.print("Time's up!");
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          delay(2000);
                                                                                                                                                                                                                                                                                                                                                                                                                                                                            digitalWrite(RELAY_PIN, HIGH); // Kunci pintu
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              door = false; // Reset status pintu
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                lcd.clear();
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  lcd.print("Enter Password"); // Kembali ke menu awal
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }