#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>

// Define pin connections
#define DIN 21  // Data input (MOSI)
#define CLK 17  // Clock signal
#define DC 19   // Data/Command pin
#define CE 18   // Chip Enable (Chip Select equivalent)
#define RST 5   // Reset pin
#define BL 15   // Backlight pin (PWM-compatible)
#define ENCODER_BUTTON_PIN 14 // Rotary encoder button pin
#define ENCODER_A 26          // Rotary encoder A pin
#define ENCODER_B 27          // Rotary encoder B pin
#define LED_PIN 25            // LED connected to this pin

// Initialize LCD
Adafruit_PCD8544 display = Adafruit_PCD8544(DIN, CLK, DC, CE, RST);

// State variables
bool menuActive = false;      // Track whether the menu is active
unsigned long buttonPressTime = 0; // Track button press duration

void setup() {
  // Initialize LCD
  display.begin();
  display.setContrast(50);    // Adjust contrast as needed
  display.clearDisplay();
  display.display();

  // Display default menu
  display.setCursor(0, 0);
  display.print("Menu");
  display.display();

  // Initialize backlight pin (optional)
  pinMode(BL, OUTPUT);
  digitalWrite(BL, HIGH); // Turn on backlight

  // Initialize encoder and LED pins
  pinMode(ENCODER_BUTTON_PIN, INPUT_PULLUP);
  pinMode(ENCODER_A, INPUT);
  pinMode(ENCODER_B, INPUT);
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // Check button press
  if (digitalRead(ENCODER_BUTTON_PIN) == LOW) {
    if (buttonPressTime == 0) {
      buttonPressTime = millis(); // Record the press time
    } else if (millis() - buttonPressTime > 2000 && !menuActive) {
      menuActive = true;          // Activate menu after holding for 2 seconds
      showMenuOptions();
    }
  } else {
    buttonPressTime = 0;          // Reset press time when button is released
  }
}

void showMenuOptions() {
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("1. Contrast");
  display.setCursor(0, 10);
  display.print("2. Counter Type");
  display.setCursor(0, 20);
  display.print("3. Counter Number");
  display.display();

  // Example: Blink LED to indicate menu is active
  digitalWrite(LED_PIN, HIGH);
  delay(100);
  digitalWrite(LED_PIN, LOW);
}