// TM1637 kütüphanesi gerekli / TM1637 library required
#include <Arduino.h>
#include <TM1637Display.h>

// Pin tanımlamaları / Pin definitions
const int CLK_PIN = 4;
const int DIO_PIN = 5;
// GPIO 5 strapping pin, boot'ta HIGH / GPIO 5 is strapping pin, HIGH at boot

TM1637Display display(CLK_PIN, DIO_PIN);

int counter = 0;
unsigned long lastUpdate = 0;
const unsigned long updateInterval = 100;
bool colonState = false;
uint8_t brightness = 7; // 0-7 parlaklık / 0-7 brightness

// "HELP" segment verisi / "HELP" segment data
const uint8_t SEG_HELP[] = {
  SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,         // H
  SEG_A | SEG_D | SEG_E | SEG_F | SEG_G,         // E
  SEG_D | SEG_E | SEG_F,                         // L
  SEG_A | SEG_B | SEG_E | SEG_F | SEG_G          // P
};

void setup() {
  Serial.begin(115200);
  Serial.println("ESP32 TM1637 4-Digit Display Demo");

  display.setBrightness(brightness);

  // Açılışta HELP göster / Show HELP on startup
  display.setSegments(SEG_HELP);
  delay(2000);

  display.clear();
  delay(500);
}

void loop() {
  if (millis() - lastUpdate >= updateInterval) {
    lastUpdate = millis();

    counter++;
    if (counter > 9999) {
      counter = 0;
    }

    if (counter % 5 == 0) {
      colonState = !colonState;
    }

    // Kolon maskesi 0b01000000 / Colon mask 0b01000000
    display.showNumberDecEx(counter, colonState ? 0b01000000 : 0, true);

    // Demo: parlaklık döngüsü / Demo: brightness cycle
    if (counter % 1000 == 0 && counter != 0) {
      brightness = (brightness + 1) % 8;
      display.setBrightness(brightness);
      Serial.printf("Counter: %d - Brightness: %d\n", counter, brightness);
    }
  }
}