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

const int buttonPin = 2;      // Pin untuk tombol push button
const int lampPins[] = {13, 12, 11, 10, 9, 8, 7, 6}; // Pin untuk lampu
const int numLamps = 8;       // Jumlah lampu
int mode = 0;                 // Mode awal (0: semua lampu mati, 1: flip-flop, 2: running)
int lastButtonState = HIGH;   // Status terakhir dari tombol (HIGH karena menggunakan INPUT_PULLUP)
unsigned long lastDebounceTime = 0;  // Waktu saat tombol terakhir kali ditekan
unsigned long debounceDelay = 50;    // Debounce delay
bool buttonPressed = false;

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C 0x27, ukuran LCD 16x2

void setup() {
  for (int i = 0; i < numLamps; i++) {
    pinMode(lampPins[i], OUTPUT); // Mengatur pin lampu sebagai output
    digitalWrite(lampPins[i], LOW); // Memastikan semua lampu mati pada awalnya
  }
  pinMode(buttonPin, INPUT_PULLUP); // Mengatur pin tombol sebagai input dengan pull-up internal
  
  // Inisialisasi LCD
  lcd.init();
  lcd.backlight(); // Mengaktifkan backlight LCD
  lcd.begin(16, 2); // Set ukuran LCD (16 karakter per baris, 2 baris)
  
  // Menampilkan mode awal pada LCD
  updateLCD();
}

void loop() {
  int reading = digitalRead(buttonPin); // Membaca status tombol

  // Mengecek apakah tombol ditekan (menggunakan debounce)
  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading == LOW && !buttonPressed) {
      buttonPressed = true;
      mode = (mode + 1) % 3; // Mengubah mode antara 0, 1, dan 2
      Serial.print("Mode changed to: ");
      Serial.println(mode);
      updateLCD(); // Memperbarui tampilan LCD setiap kali mode berubah
    } else if (reading == HIGH) {
      buttonPressed = false;
    }
  }
  
  lastButtonState = reading;

  switch (mode) {
    case 0:
      allOffMode();
      break;
    case 1:
      flipFlopMode();
      break;
    case 2:
      runningMode();
      break;
  }
}

void flipFlopMode() {
  static bool flip = false;
  static unsigned long lastChangeTime = 0;
  unsigned long currentTime = millis();
  
  if (currentTime - lastChangeTime >= 500) { // Mengubah status setiap 500ms
    flip = !flip;
    for (int i = 0; i < numLamps; i++) {
      digitalWrite(lampPins[i], flip ? HIGH : LOW);
    }
    lastChangeTime = currentTime;
    Serial.print("Flip-flop state: ");
    Serial.println(flip ? "ON" : "OFF");
  }
}

void runningMode() {
  static int currentLamp = 0;
  static unsigned long lastChangeTime = 0;
  unsigned long currentTime = millis();
  
  if (currentTime - lastChangeTime >= 200) { // Mengubah lampu setiap 200ms
    for (int i = 0; i < numLamps; i++) {
      digitalWrite(lampPins[i], LOW);
    }
    digitalWrite(lampPins[currentLamp], HIGH);
    currentLamp = (currentLamp + 1) % numLamps;
    lastChangeTime = currentTime;
    Serial.print("Running mode - Lamp: ");
    Serial.println(currentLamp);
  }
}

void allOffMode() {
  for (int i = 0; i < numLamps; i++) {
    digitalWrite(lampPins[i], LOW); // Mematikan semua lampu
  }
  Serial.println("All lamps are OFF");
}

// Fungsi untuk memperbarui tampilan LCD sesuai mode
void updateLCD() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Mode: ");
  switch (mode) {
    case 0:
      lcd.print("All Off");
      break;
    case 1:
      lcd.print("Flip-Flop");
      break;
    case 2:
      lcd.print("Running");
      break;
  }
}