/* ToolCTRL — Landing Page Interaktion */
(function () {
  "use strict";

  /* ---- Jahr im Footer ---- */
  var yearEl = document.getElementById("year");
  if (yearEl) yearEl.textContent = String(new Date().getFullYear());

  /* ---- Mobile-Navigation ---- */
  var toggle = document.querySelector(".nav-toggle");
  var mobileNav = document.querySelector(".mobile-nav");
  var header = document.querySelector(".site-header");
  function updateHeaderState() {
    if (!header) return;
    header.classList.toggle("is-scrolled", window.scrollY > 12);
  }
  updateHeaderState();
  window.addEventListener("scroll", updateHeaderState, { passive: true });

  if (toggle && mobileNav) {
    toggle.addEventListener("click", function () {
      var open = mobileNav.hasAttribute("hidden");
      if (open) {
        mobileNav.removeAttribute("hidden");
        toggle.setAttribute("aria-expanded", "true");
      } else {
        mobileNav.setAttribute("hidden", "");
        toggle.setAttribute("aria-expanded", "false");
      }
    });
    mobileNav.querySelectorAll("a").forEach(function (a) {
      a.addEventListener("click", function () {
        mobileNav.setAttribute("hidden", "");
        toggle.setAttribute("aria-expanded", "false");
      });
    });
  }

  /* ---- Dezente Scroll-Reveals ---- */
  var reduceMotion = window.matchMedia &&
    window.matchMedia("(prefers-reduced-motion: reduce)").matches;
  var revealEls = Array.prototype.slice.call(document.querySelectorAll([
    ".hero-copy > *",
    ".hero-visual",
    ".trust-strip span",
    ".product-copy > *",
    ".product-ui",
    ".section-head",
    ".card",
    ".industry-card",
    ".step",
    ".arbeit-copy > *",
    ".kanban-wrap",
    ".event-card",
    ".kontakt-copy > *",
    ".contact-promises li",
    ".lead-form",
    ".td-hero .wrap > *",
    ".td-feature > *",
    ".td-talk",
    ".speaker-card",
    ".shot",
    ".gj-teaser"
  ].join(",")));

  revealEls.forEach(function (el, index) {
    el.classList.add("reveal", "reveal-delay-" + (index % 5));
  });

  if (reduceMotion || !("IntersectionObserver" in window)) {
    revealEls.forEach(function (el) { el.classList.add("is-visible"); });
  } else {
    var observer = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (!entry.isIntersecting) return;
        entry.target.classList.add("is-visible");
        observer.unobserve(entry.target);
      });
    }, { threshold: 0.12, rootMargin: "0px 0px -8% 0px" });
    revealEls.forEach(function (el) { observer.observe(el); });
  }

  /* ---- Lead-Formular ---- */
  var form = document.getElementById("lead-form");
  var status = document.getElementById("form-status");
  if (!form) return;

  function setStatus(msg, kind) {
    if (!status) return;
    status.textContent = msg;
    status.className = "form-status " + (kind || "");
    status.hidden = false;
  }

  function fieldRow(input) {
    return input.closest(".form-row");
  }

  function validate() {
    var ok = true;
    ["f-name", "f-email", "f-nachricht"].forEach(function (id) {
      var el = document.getElementById(id);
      var row = fieldRow(el);
      var valid = el.value.trim() !== "";
      if (id === "f-email" && valid) {
        valid = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(el.value.trim());
      }
      if (row) row.classList.toggle("invalid", !valid);
      if (!valid) ok = false;
    });
    return ok;
  }

  form.addEventListener("submit", function (e) {
    e.preventDefault();

    if (!validate()) {
      setStatus("Bitte füllen Sie die markierten Pflichtfelder aus.", "err");
      return;
    }

    var btn = form.querySelector("button[type=submit]");
    var payload = {
      name: form.name.value.trim(),
      firma: form.firma.value.trim(),
      email: form.email.value.trim(),
      telefon: form.telefon.value.trim(),
      nachricht: form.nachricht.value.trim(),
      website: form.website.value.trim(), // Honeypot
      quelle: "Messe — Landing Page"
    };

    if (btn) { btn.disabled = true; btn.textContent = "Wird gesendet …"; }
    setStatus("Anfrage wird übermittelt …", "");

    fetch("/api/lead", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(payload)
    })
      .then(function (res) {
        return res.json().then(function (data) {
          return { ok: res.ok, data: data };
        });
      })
      .then(function (r) {
        if (r.ok) {
          form.reset();
          setStatus(
            "Vielen Dank — Ihre Anfrage ist bei uns eingegangen. Wir melden uns zeitnah.",
            "ok"
          );
        } else {
          setStatus(
            (r.data && r.data.error) ||
              "Es ist ein Fehler aufgetreten. Bitte versuchen Sie es erneut.",
            "err"
          );
        }
      })
      .catch(function () {
        setStatus(
          "Verbindung fehlgeschlagen. Bitte schreiben Sie uns direkt an info@tool-ctrl.de.",
          "err"
        );
      })
      .finally(function () {
        if (btn) { btn.disabled = false; btn.textContent = "Anfrage senden"; }
      });
  });

  /* Markierung beim Tippen entfernen */
  form.querySelectorAll("input, textarea").forEach(function (el) {
    el.addEventListener("input", function () {
      var row = fieldRow(el);
      if (row) row.classList.remove("invalid");
    });
  });
})();