#include <GyverOLED.h>
#include <GTimer.h>
#include <EncButton.h>
GyverOLED<SSD1306_128x64, OLED_BUFFER> oled;
//GyverOLED<SSD1306_128x64, OLED_NO_BUFFER> oled;
GTimer<millis> tmr;
Button b(12, INPUT, HIGH);

uint32_t minute, second, second_diff, last_second;

void setup() {
  Serial.begin(9600);
  oled.init();

  oled.line(120, 1, 128, 1);
  oled.line(120, 1, 120, 11);
  oled.line(120, 11, 128, 11);

  oled.line(120, 27, 128, 27);
  oled.line(120, 27, 120, 37);
  oled.line(120, 37, 128, 37);

  oled.line(120, 53, 128, 53);
  oled.line(120, 53, 120, 63);
  oled.line(120, 63, 128, 63);

  tmr.setMode(GTMode::Interval);
  tmr.setTime(1000);
  tmr.start();
}

void loop() {
  b.tick();
  if (tmr) {
    last_second = millis();
    second++;
    if (second > 59) {
      minute++;
      second = 0;
    }
  }
  if (b.click()) {
    oled.setCursor(30, 1);
    if (tmr.running()) {
      second_diff = millis();
      tmr.pause();
      uint32_t ms = (second_diff - last_second) / 10;
      oled.print(".");
      oled.print(ms);
      oled.update();
    } else {
      tmr.resume();
      oled.print("    ");
    }
  }
  if (b.hold()) {
    minute = 0;
    second = 0;
    oled.setCursor(30, 1);
    oled.print("    ");
    tmr.start();
  }
  if (digitalRead(12)) oled.rect(122, 3, 128, 9);
  else oled.clear(122, 3, 128, 9);
  oled.setScale(1);
  oled.setCursor(0, 1);
  if (minute < 10) oled.print("0");
  oled.print(minute);
  oled.print(":");
  if (second < 10) oled.print("0");
  oled.print(second);
  oled.update();
}