/* =========================================================================
   main.js — bubbles, scroll-reveal, copy-endpoint, moon fade
   Pure vanilla, no dependencies. Runs on DOMContentLoaded.
   ========================================================================= */

(function () {
  'use strict';

  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  /* --- Bubbles ------------------------------------------------------- */
  function spawnBubbles() {
    const container = document.querySelector('.layer-bubbles');
    if (!container) return;

    // fewer bubbles on small screens for performance
    const isMobile = window.matchMedia('(max-width: 640px)').matches;
    const count = isMobile ? 12 : 26;

    for (let i = 0; i < count; i++) {
      const b = document.createElement('span');
      b.className = 'bubble';

      const size = rand(16, 82);                  // bigger, glassier bubbles
      b.style.width = size + 'px';
      b.style.height = size + 'px';
      // space bubbles evenly across the width with a little jitter
      const leftPct = Math.max(0, Math.min(100, (i / count) * 100 + rand(-3.5, 3.5)));
      b.style.left = leftPct + '%';
      const dur = rand(12, 30);
      b.style.animationDuration = dur + 's';
      // negative delay = already mid-flight, so they float immediately (no waiting)
      b.style.animationDelay = '-' + rand(0, dur) + 's';
      b.style.setProperty('--sway', rand(-30, 30) + 'px');
      b.style.setProperty('--spin', rand(-60, 60) + 'deg');

      container.appendChild(b);
    }
  }

  /* --- Moon fade-in on scroll --------------------------------------- */
  function initMoon() {
    const moon = document.querySelector('.moon');
    if (!moon) return;

    const reveal = () => {
      if (window.scrollY > window.innerHeight * 0.15) {
        moon.classList.add('is-visible');
      } else {
        moon.classList.remove('is-visible');
      }
    };
    reveal();
    window.addEventListener('scroll', reveal, { passive: true });
  }

  /* --- Scroll-reveal moved to js/motion.js (handles [data-reveal] + .reveal) -- */

  /* --- Copy endpoint to clipboard (handles hero + CTA buttons) ------ */
  function initCopy() {
    const ENDPOINT = 'https://apiarium-labs.hf.space/v1/chat/completions';
    const toast = document.querySelector('.toast');

    // fill every endpoint code element with the URL
    document.querySelectorAll('.endpoint code, .endpoint-box code').forEach((el) => {
      el.textContent = ENDPOINT;
    });

    async function doCopy(btn) {
      try {
        await navigator.clipboard.writeText(ENDPOINT);
      } catch (e) {
        // fallback for older browsers
        const ta = document.createElement('textarea');
        ta.value = ENDPOINT;
        document.body.appendChild(ta);
        ta.select();
        document.execCommand('copy');
        document.body.removeChild(ta);
      }
      const orig = btn.dataset.orig || btn.textContent;
      btn.dataset.orig = orig;
      btn.textContent = 'Copied';
      btn.classList.add('copied');
      if (toast) {
        toast.classList.add('show');
        setTimeout(() => toast.classList.remove('show'), 1800);
      }
      setTimeout(() => {
        btn.textContent = orig;
        btn.classList.remove('copied');
      }, 1800);
    }

    // wire every copy button on the page
    document.querySelectorAll('.copy-btn').forEach((btn) => {
      btn.addEventListener('click', () => doCopy(btn));
    });
  }

  /* --- Count-up stat numbers on scroll-in --------------------------- */
  function initCountUp() {
    const nums = document.querySelectorAll('.num[data-count]');
    if (reduceMotion || !('IntersectionObserver' in window)) {
      nums.forEach((el) => { el.textContent = formatNum(+el.dataset.count); });
      return;
    }
    const io = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (!entry.isIntersecting) return;
        const el = entry.target;
        const target = +el.dataset.count;
        const dur = 1400;
        const startT = performance.now();
        function tick(now) {
          const p = Math.min(1, (now - startT) / dur);
          const eased = 1 - Math.pow(1 - p, 3);   // easeOutCubic
          el.textContent = formatNum(Math.round(target * eased));
          if (p < 1) requestAnimationFrame(tick);
        }
        requestAnimationFrame(tick);
        io.unobserve(el);
      });
    }, { threshold: 0.5 });
    nums.forEach((el) => io.observe(el));
  }

  /* --- helpers ------------------------------------------------------ */
  function rand(min, max) {
    return Math.random() * (max - min) + min;
  }
  function formatNum(n) {
    return n.toLocaleString('en-US');
  }

  /* --- boot --------------------------------------------------------- */
  function init() {
    spawnBubbles();
    initMoon();
    initCopy();
    initCountUp();
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', init);
  } else {
    init();
  }
})();