#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define BUTTON_LEFT 13
#define BUTTON_RIGHT 12
#define BUTTON_UP 14
#define BUTTON_DOWN 27

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Serial.begin(115200);

  pinMode(BUTTON_LEFT, INPUT);
  pinMode(BUTTON_RIGHT, INPUT);
  pinMode(BUTTON_UP, INPUT);
  pinMode(BUTTON_DOWN, INPUT);

  if(!display.begin(SSD1306_I2C_ADDRESS, 4, 15)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  display.display();
  delay(2000);  // Pause for 2 seconds
  display.clearDisplay();
}

void loop() {
  static int16_t scrollX = 0;
  static int16_t scrollY = 0;
  static String text = "Hello, ESP32!";  // Initial text

  handleButtons();  // Check button inputs

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(scrollX, scrollY);
  display.print(text);
  display.display();
  delay(50);
}

void handleButtons() {
  if (digitalRead(BUTTON_LEFT) == HIGH) {
    // Scroll text to the left
    scrollX -= 1;
  }

  if (digitalRead(BUTTON_RIGHT) == HIGH) {
    // Scroll text to the right
    scrollX += 1;
  }

  if (digitalRead(BUTTON_UP) == HIGH) {
    // Move text up
    scrollY -= 1;
  }

  if (digitalRead(BUTTON_DOWN) == HIGH) {
    // Move text down
    scrollY += 1;
  }
}