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//์Šฌ๋ผ์ด๋” ์ดˆ๊ธฐ๊ฐ’ ์„ค์ •
let currentIndex = 1;

//๋ฐ‘ ์ฝ”๋“œ์—์„œ ์‚ฌ์šฉํ•  ๋ณ€์ˆ˜๋“ค ์„ ์–ธ(์ดˆ๊ธฐํ™”)
let startTouchPosition = 0;
let endTouchPosition = 0;

const slider = document.querySelector('.slider');
const totalSlides = slider.children.length;

//์Šฌ๋ผ์ด๋“œ๋ฅผ ์˜ฎ๊ธฐ๋Š” ํ•จ์ˆ˜
function moveToSlide(n) {
  let newSlidePosition = ((n - 1) * -100) / totalSlides;
  slider.style.transform = `translateX(${newSlidePosition}%)`;
  currentIndex = n;
}

// ํŽ˜์ด์ง€ ๋กœ๋“œ ์‹œ ๋‘ ๋ฒˆ์งธ ์Šฌ๋ผ์ด๋“œ๋กœ ์ด๋™
document.addEventListener('DOMContentLoaded', () => {
  moveToSlide(currentIndex); // ์ดˆ๊ธฐ ์œ„์น˜ ์„ค์ •
});


// ํ‚ค๋ณด๋“œ ์ด๋ฒคํŠธ
document.addEventListener('keydown', (e) => {
  if (e.key === 'ArrowLeft' || e.key === 'a') {
    // 'ArrowLeft', 'a', 'ใ…' ํ‚ค ์ฒ˜๋ฆฌ
    if (currentIndex > 0) {
      moveToSlide(currentIndex - 1);
    }
  } else if (e.key === 'ArrowRight' || e.key === 'd') {
    // 'ArrowRight', 'd' ํ‚ค ์ฒ˜๋ฆฌ
    if (currentIndex < totalSlides - 1) {
      moveToSlide(currentIndex + 1);
    }
  }
});


// ํ„ฐ์น˜ ์ด๋ฒคํŠธ ์‹œ์ž‘
slider.addEventListener('touchstart', (e) => {
  startTouchPosition = e.touches[0].clientX;
});

// ํ„ฐ์น˜ ์ด๋ฒคํŠธ ๋
slider.addEventListener('touchend', (e) => {
  endTouchPosition = e.changedTouches[0].clientX;
  handleTouchMove();
});

function handleTouchMove() {
  if (startTouchPosition - endTouchPosition > 50 && currentIndex < totalSlides - 1) {
    // ์˜ค๋ฅธ์ชฝ์œผ๋กœ ์Šฌ๋ผ์ด๋“œ
    moveToSlide(currentIndex + 1);
  } else if (endTouchPosition - startTouchPosition > 50 && currentIndex > 0) {
    // ์™ผ์ชฝ์œผ๋กœ ์Šฌ๋ผ์ด๋“œ
    moveToSlide(currentIndex - 1);
  }
}


// ๋งˆ์šฐ์Šค ํœ  ์ด๋ฒคํŠธ
slider.addEventListener('wheel', (e) => {
  e.preventDefault(); // ํŽ˜์ด์ง€ ์Šคํฌ๋กค ๋ฐฉ์ง€

  if (e.deltaY < 0 && currentIndex > 0) {
    // ํœ ์„ ์œ„๋กœ ์Šคํฌ๋กค (์ด์ „ ์Šฌ๋ผ์ด๋“œ๋กœ ์ด๋™)
    moveToSlide(currentIndex - 1);
  } else if (e.deltaY > 0 && currentIndex < totalSlides - 1) {
    // ํœ ์„ ์•„๋ž˜๋กœ ์Šคํฌ๋กค (๋‹ค์Œ ์Šฌ๋ผ์ด๋“œ๋กœ ์ด๋™)
    moveToSlide(currentIndex + 1);
  }
});