/* ==========================================================================
   SOLUCIONIKA — main.js
   Comportamiento compartido: nav al hacer scroll, revelado de secciones,
   contadores animados. Se incluye una sola vez desde footerTest.php
   ========================================================================== */
document.addEventListener('DOMContentLoaded', function () {

  /* Sidenav Materialize */
  var sidenavElems = document.querySelectorAll('.sidenav');
  if (window.M) { M.Sidenav.init(sidenavElems); }

  /* Header: estado "scrolled" */
  var headerBar = document.querySelector('.nk-header-bar');
  function onScrollHeader() {
    if (!headerBar) return;
    if (window.scrollY > 24) headerBar.classList.add('is-scrolled');
    else headerBar.classList.remove('is-scrolled');
  }
  onScrollHeader();
  window.addEventListener('scroll', onScrollHeader, { passive: true });

  /* Marcar link activo según la página actual */
  var here = window.location.pathname.split('/').pop() || 'index.html';
  document.querySelectorAll('.nk-links a, .nk-sidenav a').forEach(function (a) {
    var href = a.getAttribute('href');
    if (href && href === here) a.classList.add('active');
  });

  /* Revelado al hacer scroll (IntersectionObserver) */
  var revealEls = document.querySelectorAll('.reveal');
  if ('IntersectionObserver' in window && revealEls.length) {
    var io = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (entry.isIntersecting) {
          entry.target.classList.add('is-visible');
          io.unobserve(entry.target);
        }
      });
    }, { threshold: 0.15, rootMargin: '0px 0px -40px 0px' });
    revealEls.forEach(function (el, i) {
      el.style.setProperty('--i', i % 6);
      io.observe(el);
    });
  } else {
    revealEls.forEach(function (el) { el.classList.add('is-visible'); });
  }

  /* Contadores animados de la sección de estadísticas */
  var counters = document.querySelectorAll('[data-count]');
  if (counters.length) {
    var counted = new WeakSet();
    var countObserver = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (entry.isIntersecting && !counted.has(entry.target)) {
          counted.add(entry.target);
          animateCount(entry.target);
        }
      });
    }, { threshold: 0.6 });
    counters.forEach(function (el) { countObserver.observe(el); });
  }
  function animateCount(el) {
    var target = parseFloat(el.getAttribute('data-count'));
    var duration = 1400;
    var start = null;
    function step(ts) {
      if (!start) start = ts;
      var progress = Math.min((ts - start) / duration, 1);
      var eased = 1 - Math.pow(1 - progress, 3);
      var value = target * eased;
      el.textContent = (target % 1 === 0) ? Math.floor(value) : value.toFixed(1);
      if (progress < 1) requestAnimationFrame(step);
      else el.textContent = target % 1 === 0 ? target : target.toFixed(1);
    }
    requestAnimationFrame(step);
  }
});