document.addEventListener('DOMContentLoaded', () => {
  // DOM Elements
  const lootTrack = document.getElementById('lootTrack');
  const lootWrapper = document.getElementById('lootWrapper');
  const multiTrack = document.getElementById('multiTrack');
  const multiWrapper = document.getElementById('multiWrapper');
  const spinBtn = document.getElementById('spinBtn');
  const popupBackdrop = document.getElementById('popupBackdrop');
  const popupTotal = document.getElementById('popupTotal');
  const popupBase = document.getElementById('popupBase');
  const popupMulti = document.getElementById('popupMulti');
  const popupClose = document.getElementById('popupClose');

  // Loot Box Data
  const lootBoxesData = [
    { prize: 10, rarity: 'green' },
    { prize: 15, rarity: 'blue' },
    { prize: 20, rarity: 'blue' },
    { prize: 25, rarity: 'green' },
    { prize: 30, rarity: 'purple' },
    { prize: 35, rarity: 'purple' },
    { prize: 40, rarity: 'green' },
    { prize: 45, rarity: 'blue' },
    { prize: 50, rarity: 'purple' },
    { prize: 100, rarity: 'gold' }
  ];

  // Multiplier Data
  const multipliers = [1, 1.25, 1.5, 2, 3, 5, 1, 1.25, 1.5, 2, 3, 5];

  // Initialize tracks
  function initializeTracks() {
    // Create loot boxes
    lootBoxesData.forEach(box => {
      const boxElement = document.createElement('div');
      boxElement.className = 'loot-box';
      boxElement.dataset.prize = box.prize;
      boxElement.dataset.rarity = box.rarity;
      
      const inner = document.createElement('div');
      inner.className = 'loot-box-inner';
      boxElement.appendChild(inner);
      
      lootTrack.appendChild(boxElement);
    });

    // Create multiplier pills
    multipliers.forEach(m => {
      const pill = document.createElement('div');
      pill.className = 'multi-pill';
      pill.dataset.m = m;
      pill.textContent = `×${m}`;
      multiTrack.appendChild(pill);
    });
  }

  // Spin animation function
  async function spinTrack(track, items, wrapper, extraMinSteps, extraMaxSteps, duration) {
    return new Promise(resolve => {
      // Reset classes
      items.forEach(el => {
        el.classList.remove('selected', 'motion-blur');
      });

      const targetIndex = Math.floor(Math.random() * items.length);
      const wrapperRect = wrapper.getBoundingClientRect();
      const centerX = wrapperRect.left + wrapperRect.width / 2;
      const targetRect = items[targetIndex].getBoundingClientRect();
      const targetCenter = targetRect.left + targetRect.width / 2;
      const deltaToCenter = centerX - targetCenter;

      // Calculate step size
      let step = 0;
      if (items.length > 1) {
        const r0 = items[0].getBoundingClientRect();
        const r1 = items[1].getBoundingClientRect();
        step = Math.abs((r1.left + r1.width / 2) - (r0.left + r0.width / 2));
      } else {
        step = targetRect.width + 18;
      }

      const extraSteps = extraMinSteps + Math.floor(Math.random() * (extraMaxSteps - extraMinSteps + 1));
      const direction = Math.random() > 0.5 ? 1 : -1;
      const extraDistance = extraSteps * step * direction;
      const currentTranslate = parseFloat(track.style.transform?.replace('translateX(', '').replace('px)', '') || '0');
      const finalTranslate = currentTranslate + deltaToCenter + extraDistance;

      // Apply motion blur
      items.forEach((el, i) => {
        if (i !== targetIndex) el.classList.add('motion-blur');
      });

      // Start animation
      track.style.transition = `transform ${duration}ms cubic-bezier(0.1, 0.9, 0.24, 1)`;
      track.style.transform = `translateX(${finalTranslate}px)`;

      setTimeout(() => {
        track.style.transition = '';
        items.forEach(el => el.classList.remove('motion-blur'));
        items[targetIndex].classList.add('selected');
        resolve({ index: targetIndex, element: items[targetIndex] });
      }, duration + 40);
    });
  }

  // Handle spin button click
  async function handleSpin() {
    if (spinBtn.disabled) return;
    spinBtn.disabled = true;

    // Spin loot boxes
    const lootResult = await spinTrack(lootTrack, [...lootTrack.children], lootWrapper, 3, 6, 1100);
    const basePrize = parseFloat(lootResult.element.dataset.prize);

    // Spin multiplier
    const multiResult = await spinTrack(multiTrack, [...multiTrack.children], multiWrapper, 4, 7, 1000);
    const multiplier = parseFloat(multiResult.element.dataset.m);

    // Calculate total
    const total = Math.round(basePrize * multiplier * 100) / 100;

    // Show result
    popupTotal.textContent = `${total} SC`;
    popupBase.textContent = `Base: ${basePrize} SC`;
    popupMulti.textContent = `Multiplier: ×${multiplier}`;
    popupBackdrop.classList.remove('hidden');

    spinBtn.disabled = false;
  }

  // Event listeners
  spinBtn.addEventListener('click', handleSpin);
  popupClose.addEventListener('click', () => {
    popupBackdrop.classList.add('hidden');
  });
  popupBackdrop.addEventListener('click', (e) => {
    if (e.target === popupBackdrop) {
      popupBackdrop.classList.add('hidden');
    }
  });

  // Initialize
  initializeTracks();
});