#define LED 2
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>


#define SCREEN_WIDTH 128  // OLED display width, in pixels
#define SCREEN_HEIGHT 64  // OLED display height, in pixels


// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

#define BTN_RED GPIO_NUM_13


volatile bool button_pressed = false;


int pressCount = 0;

void button_config()
{
  gpio_install_isr_service(0);
  printf("configuring button\n");
  gpio_reset_pin(BTN_RED);
  gpio_set_direction(BTN_RED, GPIO_MODE_INPUT);
  gpio_pullup_en(BTN_RED);
  gpio_set_intr_type(BTN_RED, GPIO_INTR_POSEDGE);
  gpio_isr_handler_add(BTN_RED, gpio_isr_handler, NULL);
  printf("config complete\n");
}


static void gpio_isr_handler(void* arg)
{
  button_pressed = true;
}


void setup() {

  Serial.begin(115200);

  button_config();


  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {  // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  delay(2000);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 30);

  // Display static text
  display.println(pressCount);
  display.display();
  // delay(100);
}


void loop() {

  if (button_pressed) {
    Serial.println("Button pressed, count: ");
    Serial.println(pressCount);
    pressCount++;
      display.clearDisplay();

  display.print(pressCount);
  display.display();

    button_pressed = false;
  }

}