#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Keypad.h>

#define TINGGI_LAYAR 64
#define LEBAR_LAYAR 128

const byte BARIS = 4;
const byte KOLOM = 4;

Adafruit_SSD1306 oled(LEBAR_LAYAR, TINGGI_LAYAR, &Wire, -1);

char tombol[BARIS][KOLOM] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte pinBaris[BARIS] = {14, 12, 19, 18};
byte pinKolom[KOLOM] = {5, 4, 2, 15};

Keypad keypadCustom = Keypad(makeKeymap(tombol), pinBaris, pinKolom, BARIS, KOLOM);

char tombolCustom;
int angka = 0;
int kataSandi = 9999;

int ledMerah = 26;
int ledHijau = 33;
int buzzer = 25;
int batasSandi = 4;
int hitungAngka = 0;
int kursorSandi = 38;

void setup() {
  Serial.begin(115200);

  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("Gagal memulai SSD1306 OLED"));
    while (1);
  }
  pinMode(ledMerah, OUTPUT);
  pinMode(ledHijau, OUTPUT);

  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setTextColor(WHITE);  
  oled.setCursor(25, 20);
  oled.print("SELAMAT DATANG");
  oled.display();
  delay(500);
  tone(buzzer, 3000);
  digitalWrite(ledMerah, HIGH);
  digitalWrite(ledHijau, HIGH);
  delay(200);
  noTone(buzzer);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledHijau, LOW);
  delay(300);
  tone(buzzer, 3000);
  digitalWrite(ledMerah, HIGH);
  digitalWrite(ledHijau, HIGH);
  delay(200);
  noTone(buzzer);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledHijau, LOW);
  delay(500);
  oled.setTextSize(2);
  oled.setCursor(25, 30);
  oled.print(".");
  oled.display();
  delay(200);
  oled.setCursor(45, 30);
  oled.print(".");
  oled.display();
  delay(200);
  oled.setCursor(65, 30);
  oled.print(".");
  oled.display();
  delay(200);
  oled.setCursor(85, 30);
  oled.print(".");
  oled.display();
  delay(200);
  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setCursor(2, 25);
  oled.print("Masukkan Sandi");
  oled.display();
  delay(1000);
  oled.clearDisplay();
}

void loop() {
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(23, 25);
  oled.print("Input Sandi");

  tombolCustom = keypadCustom.getKey();

  switch (tombolCustom) {
    case '0' ... '9':
      hitungAngka++;
      if (hitungAngka <= batasSandi) {
        angka = angka * 10 + (tombolCustom - '0');
        oled.setTextSize(2);
        oled.setTextColor(WHITE);
        oled.setCursor(kursorSandi, 35);
        oled.println("*");
        oled.display();
        kursorSandi += 14;
        tone(buzzer, 500);
        delay(10);
        noTone(buzzer);
      }
      break;

    case '#':
      oled.clearDisplay();
      if (angka == kataSandi) {
        oled.setTextSize(1);
        oled.setTextColor(WHITE);
        oled.setCursor(18, 25);
        oled.print("Akses Diterima ");
        oled.display();
        tone(buzzer, 3000);
        digitalWrite(ledHijau, HIGH);
        delay(200);
        noTone(buzzer);
        digitalWrite(ledHijau, LOW);
        delay(300);
        tone(buzzer, 3000);
        digitalWrite(ledHijau, HIGH);
        delay(200);
        noTone(buzzer);
        digitalWrite(ledHijau, LOW);
        delay(500);
        delay(1000);
        angka = 0;
        hitungAngka = 0;
        kursorSandi = 38;
        delay(1000);
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setCursor(27, 25);
        oled.print("Pintu Terbuka");
        oled.display();
        delay(3000);
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setCursor(27, 25);
        oled.print("Pintu Ditutup");
        oled.display();
        delay(2000);
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setCursor(2, 25);
        oled.print("Masukkan Sandi");
        oled.display();
        delay(100);
        oled.clearDisplay();
      } else {
        oled.setTextSize(1);
        oled.setTextColor(WHITE);
        oled.setCursor(18, 25);
        oled.print("Sandi Salah");
        oled.display();
        tone(buzzer, 1000);
        digitalWrite(ledMerah, HIGH);
        delay(700);
        noTone(buzzer);
        digitalWrite(ledMerah, LOW);
        delay(500);
        tone(buzzer, 1000);
        digitalWrite(ledMerah, HIGH);
        delay(500);
        noTone(buzzer);
        digitalWrite(ledMerah, LOW);
        delay(500);
        angka = 0;
        hitungAngka = 0;
        kursorSandi = 38;
        delay(2000);
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setCursor(2, 25);
        oled.print("Masukkan Sandi");
        oled.display();
        delay(100);
        oled.clearDisplay();
      }
      break;

    case '*':
      hitungAngka = 0;
      kursorSandi = 38;
      angka = 0;
      oled.clearDisplay();
      oled.setTextSize(1);
      oled.setCursor(2, 25);
      oled.print("Masukkan Sandi");
      oled.display();
      delay(100);
      oled.clearDisplay();
      break;
  }
}