#include <U8g2lib.h>

// Initialize display for ESP32-C3 with specified I2C pins (GPIO 8 and GPIO 7)
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE, /* clock=*/8, /* data=*/7);

// Bitmap icons
const uint8_t bitmap_icon1[] U8X8_PROGMEM = {
    0x00, 0x00, 0x07, 0xC0, 0x1F, 0xE0, 0x3F, 0xF0,
  0x7F, 0xF8, 0x7F, 0xF8, 0x3F, 0xF0, 0x1F, 0xE0,
  0x07, 0xC0, 0x07, 0xC0, 0x1F, 0xE0, 0x3F, 0xF0,
  0x7F, 0xF8, 0x7F, 0xF8, 0x3F, 0xF0, 0x1F, 0xE0
};

const uint8_t bitmap_icon2[] U8X8_PROGMEM = {
  0x00, 0x18, 0x24, 0x42, 0x81, 0x42, 0x24, 0x18,
  0x18, 0x24, 0x42, 0x81, 0x42, 0x24, 0x18, 0x00
};

// Array of bitmap pointers
const uint8_t* bitmap_icons[] = {bitmap_icon1, bitmap_icon2};
const char* menu_items[] = {"Option 1", "Option 2"};

uint8_t item_selected = 0;

// Define button pins for ESP32-C3
const int button_up = 3;     // GPIO 3 for UP button
const int button_down = 4;   // GPIO 4 for DOWN button

void setup() {
  Serial.begin(115200);  // Debugging
  u8g2.begin();

  // Initialize buttons
  pinMode(button_up, INPUT_PULLUP);
  pinMode(button_down, INPUT_PULLUP);

  Serial.println("Setup complete! Ready to display menu.");
}

void loop() {
  // Check button presses
  if (digitalRead(button_up) == LOW) {
    item_selected = (item_selected + 1) % 2;  // Next menu item
    delay(200);  // Debounce
    Serial.println("Button UP pressed!");
  }
  if (digitalRead(button_down) == LOW) {
    item_selected = (item_selected - 1 + 2) % 2;  // Previous menu item
    delay(200);  // Debounce
    Serial.println("Button DOWN pressed!");
  }

  // Clear and render the display
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_7x14B_tr);
  u8g2.drawStr(25, 37, menu_items[item_selected]);  // Draw menu text
  u8g2.drawXBMP(4, 24, 16, 16, bitmap_icons[item_selected]);  // Draw bitmap icon
  u8g2.sendBuffer();

  delay(100);  // Small delay for display refresh
}