#include <Arduino.h>

// Definisi Pin 7-Segment 
const int pinA = 7;
const int pinB = 6;
const int pinC = 5;
const int pinD = 10;
const int pinE = 11;
const int pinF = 8;
const int pinG = 9;
const int pinDP = 4;
// Definisi Pin Tombol
const int tombolMaju = 12;   
const int tombolMundur = 13; 
// Definisi pin Buzzer
const int pinBuzzer=3;
// Variabel Logika Utama
int angkaSekarang = 0;

void clearDisplay() {
  digitalWrite(pinA, LOW); digitalWrite(pinB, LOW);
  digitalWrite(pinC, LOW); digitalWrite(pinD, LOW);
  digitalWrite(pinE, LOW); digitalWrite(pinF, LOW);
  digitalWrite(pinG, LOW); digitalWrite(pinDP, LOW);
}

void tampilkanAngka(int num) {
  clearDisplay();
  switch (num) {
    case 0: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, HIGH); break;
    case 1: digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); break;
    case 2: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinG, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinD, HIGH); break;
    case 3: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinG, HIGH); digitalWrite(pinC, HIGH); digitalWrite(pinD, HIGH); break;
    case 4: digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); break;
    case 5: digitalWrite(pinA, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); digitalWrite(pinC, HIGH); digitalWrite(pinD, HIGH); break;
    case 6: digitalWrite(pinA, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinD, HIGH); digitalWrite(pinC, HIGH); break;
    case 7: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); break;
    case 8: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); break;
    case 9: digitalWrite(pinA, HIGH); digitalWrite(pinB, HIGH); digitalWrite(pinC, HIGH); digitalWrite(pinD, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); break;
  }
}

void setup() {
  // buzzer
  pinMode(pinBuzzer, OUTPUT);

  // Inisialisasi pin output untuk 7-Segment
  int outPins[] = {pinA, pinB, pinC, pinD, pinE, pinF, pinG, pinDP};
  for (int i = 0; i < 8; i++) pinMode(outPins[i], OUTPUT);
  
  // Menggunakan Pull-up internal untuk keamanan dan efisiensi sirkuit
  pinMode(tombolMaju, INPUT_PULLUP);
  pinMode(tombolMundur, INPUT_PULLUP);
  
  tampilkanAngka(angkaSekarang);
}

void loop() {
  // 1. Logika Tombol MAJU (Pin 12)
  if (digitalRead(tombolMaju) == LOW) { 
    delay(50); // Meredam noise mekanis (Debounce)
    if (digitalRead(tombolMaju) == LOW) {
      digitalWrite(pinBuzzer,HIGH);
      delay(100);
      digitalWrite(pinBuzzer,LOW);
      angkaSekarang++;
      if (angkaSekarang > 9) angkaSekarang = 0; 
      
      tampilkanAngka(angkaSekarang);
      
      // Mengunci eksekusi loop hingga tombol benar-benar dilepas
      while(digitalRead(tombolMaju) == LOW); 
      digitalWrite(pinBuzzer,HIGH);
      delay(500);
    }
  }

  // 2. Logika Tombol MUNDUR (Pin 13)
  if (digitalRead(tombolMundur) == LOW) { 
    delay(50); // Meredam noise mekanis (Debounce)
    if (digitalRead(tombolMundur) == LOW) {
      digitalWrite(pinBuzzer,HIGH);
      delay(100);
      digitalWrite(pinBuzzer,LOW);
      angkaSekarang--;
      if (angkaSekarang < 0) angkaSekarang = 9; 
      
      tampilkanAngka(angkaSekarang);
      
      // Mengunci eksekusi loop hingga tombol benar-benar dilepas
      while(digitalRead(tombolMundur) == LOW); 
    }
  }
}