(function setupMetrika() {
  let initialized = false;

  function counterIdFrom(content) {
    const value = String(content?.["analytics.metrikaCounterId"] || "").trim();
    return /^\d+$/.test(value) ? Number(value) : null;
  }

  function reachGoal(counterId, name, params) {
    if (typeof window.ym === "function") {
      window.ym(counterId, "reachGoal", name, params || {});
    }
  }

  function placementFor(element) {
    if (element.classList.contains("header-cta")) return "header";
    if (element.classList.contains("mobile-sticky-cta")) return "mobile_sticky";
    if (element.closest(".hero-actions")) return "hero";
    if (element.closest(".final-cta")) return "final";
    if (element.closest("footer")) return "footer";
    if (element.closest("nav, .mobile-menu")) return "navigation";
    return "content";
  }

  function enableDetailedTracking(counterId) {
    document.addEventListener("click", (event) => {
      const link = event.target.closest?.("a[data-link-key]");
      if (!link) return;
      const key = link.dataset.linkKey;
      const params = { link: key, placement: placementFor(link) };

      if (key === "links.apply") reachGoal(counterId, "application_click", params);
      else if (key === "links.regulation") reachGoal(counterId, "regulation_download", params);
      else if (["links.vk", "links.telegram", "links.website", "links.phone", "links.email"].includes(key)) {
        reachGoal(counterId, "contact_click", params);
      } else reachGoal(counterId, "navigation_click", params);
    });

    document.querySelectorAll("details[data-faq-id]").forEach((item) => {
      item.addEventListener("toggle", () => {
        if (item.open) reachGoal(counterId, "faq_open", { question: item.dataset.faqId });
      });
    });

    const reached = new Set();
    const depths = [25, 50, 75, 90];
    let scheduled = false;
    function checkDepth() {
      scheduled = false;
      const available = document.documentElement.scrollHeight - window.innerHeight;
      const depth = available > 0 ? Math.round((window.scrollY / available) * 100) : 100;
      depths.forEach((value) => {
        if (depth >= value && !reached.has(value)) {
          reached.add(value);
          reachGoal(counterId, `scroll_${value}`, { depth: value });
        }
      });
    }
    window.addEventListener("scroll", () => {
      if (scheduled) return;
      scheduled = true;
      window.requestAnimationFrame(checkDepth);
    }, { passive: true });
    checkDepth();
    window.setTimeout(() => reachGoal(counterId, "engaged_30s"), 30000);
  }

  function initialize(content) {
    if (initialized) return;
    const counterId = counterIdFrom(content);
    if (!counterId) return;
    initialized = true;
    window.__PFP_METRIKA_ID__ = counterId;

    window.ym = window.ym || function metrikaQueue() {
      (window.ym.a = window.ym.a || []).push(arguments);
    };
    window.ym.l = Date.now();
    const script = document.createElement("script");
    script.async = true;
    script.src = `https://mc.yandex.ru/metrika/tag.js?id=${counterId}`;
    document.head.append(script);

    window.ym(counterId, "init", {
      ssr: true,
      clickmap: true,
      trackLinks: true,
      accurateTrackBounce: true,
      webvisor: true,
      referrer: document.referrer,
      url: window.location.href,
    });
    window.ym(counterId, "params", { programme: "scholarship_2026" });
    enableDetailedTracking(counterId);
  }

  document.addEventListener("pfp:content-ready", (event) => initialize(event.detail));
  if (window.__PFP_CONTENT__) initialize(window.__PFP_CONTENT__);
})();