#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// lcd object (i2c)
LiquidCrystal_I2C lcd(0x27, 16, 2); 

// Seven segment display dengan push button, animasi loading, dan LCD

// Oleh Kelompok 5, Kelas XI-10
// Gunakan tombol merah untuk menambah angka dan biru untuk mengurangi angka!
// SHORTCUT: 1 untuk menambah dan 2 untuk mengurangi (pastikan klik dulu window bagian simulation).

// pin-pin untuk seven segment display
int A = 2;
int B = 3;
int C = 4;
int D = 6;
int DP = 5;
int E = 7;
int F = 8;
int G = 9;

int switchUpPin = 13;    // pin untuk tombol naik
int switchDownPin = 12;  // pin untuk tombol turun
int buzzerPin = 10;      // pin untuk buzzer

int counter = 0;
int buttonUpState = 0;
int lastButtonUpState = 0;
int buttonDownState = 0;
int lastButtonDownState = 0;

unsigned long previousMillis = 0;
const long interval = 500;  // interval kedip (dalam ms)
bool lcdState = false;

void setup() 
{
  Serial.begin(9600);

  lcd.init();
  lcd.backlight();

  // set pin mode untuk seven segment display
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(DP, OUTPUT);

  pinMode(buzzerPin, OUTPUT);

  digitalWrite(DP, HIGH);  // matikan decimal point
  Serial.println("!!! Code modified by Bhagaskara !!!");
  delay(1000);
  Serial.println("Loading...");
  
  loadingAnimation();
  
  Serial.println("Seven Segment Counter siap digunakan!");
  Serial.println("Tekan tombol UP (warna biru) untuk menambah angka, DOWN (warna merah) untuk mengurangi.");
  Serial.println("Angka saat ini: 0");

  // tulisan di lcd
  lcd.setCursor(0, 0);
  lcd.print("Kelompok 5");
  lcd.setCursor(0, 1);
  lcd.print("Kelas XI-10");
}

void loop() 
{
  unsigned long currentMillis = millis();

  // kedip kedip lcd
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    if (lcdState) {
      lcd.noDisplay();
    } else {
      lcd.display();
    }
    lcdState = !lcdState;
  }

  buttonUpState = digitalRead(switchUpPin);
  buttonDownState = digitalRead(switchDownPin);

  // cek tombol naik
  if (buttonUpState != lastButtonUpState) 
  {
    if (buttonUpState == HIGH) 
    {
      if(counter == 9)
      {
        counter = -1;
      }
      counter++;
      Serial.print("Angka naik: ");
      Serial.println(counter);
      changeNumber(counter);
      buzz(); 
      delay(300);
    }
    delay(50);
  }

  // cek tombol turun
  if (buttonDownState != lastButtonDownState) 
  {
    if (buttonDownState == HIGH) 
    {
      if(counter == 0)
      {
        counter = 10;
      }
      counter--;
      Serial.print("Angka turun: ");
      Serial.println(counter);
      changeNumber(counter);
      buzz();
      delay(300);
    }
    delay(50);
  }

  lastButtonUpState = buttonUpState;
  lastButtonDownState = buttonDownState;
  changeNumber(counter);
}

void changeNumber(int buttonPress)
{
  switch (buttonPress)
  {
    // konfigurasi untuk setiap angka 0-9
    case 0:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, HIGH);
      break;
    case 1:
      digitalWrite(A, HIGH);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
      break;
    case 2:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, HIGH);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, HIGH);
      digitalWrite(G, LOW);
      break;
    case 3:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, LOW);
      break;
    case 4:
      digitalWrite(A, HIGH);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
      break;
    case 5:
      digitalWrite(A, LOW);
      digitalWrite(B, HIGH);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, HIGH);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
      break;
    case 6:
      digitalWrite(A, LOW);
      digitalWrite(B, HIGH);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
      break;
    case 7:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
      break;
    case 8:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
      break;
    case 9:
      digitalWrite(A, LOW);
      digitalWrite(B, LOW);
      digitalWrite(C, LOW);
      digitalWrite(D, LOW);
      digitalWrite(E, HIGH);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
      break;
  }
}

void buzz() 
{
    // bunyikan buzzer sebentar
    tone(buzzerPin, 68);
    delay(50);  
    noTone(buzzerPin); 
}

void loadingAnimation()
{
  // anim loading
  for (int i = 0; i < 3; i++) {  // loop 3x
    digitalWrite(A, LOW); delay(100); digitalWrite(A, HIGH);
    digitalWrite(B, LOW); delay(100); digitalWrite(B, HIGH);
    digitalWrite(C, LOW); delay(100); digitalWrite(C, HIGH);
    digitalWrite(D, LOW); delay(100); digitalWrite(D, HIGH);
    digitalWrite(E, LOW); delay(100); digitalWrite(E, HIGH);
    digitalWrite(F, LOW); delay(100); digitalWrite(F, HIGH);
    digitalWrite(A, LOW);
    digitalWrite(B, LOW);
    digitalWrite(C, LOW);
    digitalWrite(D, LOW);
    digitalWrite(E, LOW);
    digitalWrite(F, LOW);
    digitalWrite(G, LOW);
    delay(200);
    digitalWrite(A, HIGH);
    digitalWrite(B, HIGH);
    digitalWrite(C, HIGH);
    digitalWrite(D, HIGH);
    digitalWrite(E, HIGH);
    digitalWrite(F, HIGH);
    digitalWrite(G, HIGH);
    delay(200);
  }
}