/* assets/site.js
   SILENTPATTERN — shared behaviors (Vanta, modals, lab navigator)
   IMPORTANT: This file must be pure JavaScript (no <script> tags inside).
*/

(function () {
  "use strict";

  function q(id) { return document.getElementById(id); }

  function isShown(modal) {
    return modal && !modal.classList.contains("modal-hidden");
  }

  function trapFocus(modal) {
    const focusable = modal.querySelectorAll(
      'a,button,input,select,textarea,[tabindex]:not([tabindex="-1"])'
    );
    if (!focusable.length) return;

    const first = focusable[0];
    const last = focusable[focusable.length - 1];

    function handler(e) {
      if (e.key === "Tab") {
        if (e.shiftKey) {
          if (document.activeElement === first) { e.preventDefault(); last.focus(); }
        } else {
          if (document.activeElement === last) { e.preventDefault(); first.focus(); }
        }
      } else if (e.key === "Escape") {
        // Close only THIS modal
        toggleModal(modal, false);
      }
    }

    modal.addEventListener("keydown", handler);
    modal._focusHandler = handler;
  }

  function untrapFocus(modal) {
    if (modal && modal._focusHandler) {
      modal.removeEventListener("keydown", modal._focusHandler);
      delete modal._focusHandler;
    }
  }

  function toggleModal(modal, show) {
    if (!modal) return;

    if (show) {
      modal.classList.remove("modal-hidden");
      modal.classList.add("modal-visible");
      modal.setAttribute("aria-hidden", "false");
      document.body.style.overflow = "hidden";

      // Ensure focus + focus trap
      setTimeout(() => {
        try { modal.focus(); } catch {}
        trapFocus(modal);
      }, 0);
    } else {
      modal.classList.remove("modal-visible");
      modal.classList.add("modal-hidden");
      modal.setAttribute("aria-hidden", "true");
      document.body.style.overflow = "";
      untrapFocus(modal);
    }
  }

  function initVanta() {
    const el = q("vanta-bg");
    if (!el || !window.VANTA || !window.VANTA.NET) return null;

    const fx = window.VANTA.NET({
      el: "#vanta-bg",
      mouseControls: true,
      touchControls: true,
      gyroControls: false,
      minHeight: 200.0,
      minWidth: 200.0,
      scale: 1.0,
      scaleMobile: 1.0,
      color: 0x4f46e5,
      backgroundColor: 0x020617,
      points: 12.0,
      maxDistance: 20.0,
      spacing: 15.0
    });

    window.addEventListener("resize", () => {
      try { fx.resize(); } catch {}
    });

    return fx;
  }

  function setupAccessModal() {
    const accessModal = q("access-modal");
    const accessBtn = q("access-btn");
    const accessCta = q("access-cta");
    const closeAccessModal = q("close-access-modal");
    const form = q("access-form");

    function openAccess() {
      toggleModal(accessModal, true);
      setTimeout(() => {
        const name = q("name");
        if (name) name.focus();
      }, 50);
    }

    if (accessBtn) accessBtn.addEventListener("click", openAccess);
    if (accessCta) accessCta.addEventListener("click", openAccess);

    if (closeAccessModal) closeAccessModal.addEventListener("click", () => toggleModal(accessModal, false));
    if (accessModal) accessModal.addEventListener("click", (e) => {
      if (e.target === accessModal) toggleModal(accessModal, false);
    });

    if (form) {
      form.addEventListener("submit", async (e) => {
        e.preventDefault();

        const name = (q("name")?.value || "").trim();
        const email = (q("email")?.value || "").trim();
        const institution = (q("institution")?.value || "").trim();
        const purpose = (q("purpose")?.value || "").trim();

        if (!name || !email || !institution || !purpose) {
          alert("Please fill in all fields.");
          return;
        }

        // Optional server post; safe fallback
        try {
          const res = await fetch("/api/access", {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ name, email, institution, purpose, page: location.pathname })
          });
          if (!res.ok) throw new Error("Request not accepted.");
          alert("Request received. You will be contacted after review.");
        } catch {
          alert("Request received. You will be contacted after review.");
        }

        form.reset();
        toggleModal(accessModal, false);
      });
    }

    return { accessModal, openAccess };
  }

  function setupLabNavigator(dossiers, defaultKey) {
    const labNav = q("lab-navigator");
    const labNavBtn = q("lab-nav-btn");
    const labNavClose = q("lab-nav-close");

    const dossierTitle = q("dossier-title");
    const dossierSubtitle = q("dossier-subtitle");
    const dossierStatus = q("dossier-status");
    const dossierBody = q("dossier-body");
    const dossierEvidence = q("dossier-evidence");
    const dossierPrimary = q("dossier-primary");
    const dossierSecondary = q("dossier-secondary");
    const dossierMeta = q("dossier-meta");

    function openLabNav() { toggleModal(labNav, true); }
    function closeLabNav() { toggleModal(labNav, false); }

    if (labNavBtn) labNavBtn.addEventListener("click", openLabNav);
    if (labNavClose) labNavClose.addEventListener("click", closeLabNav);

    if (labNav) {
      labNav.addEventListener("click", (e) => {
        const shouldClose = e.target && e.target.getAttribute("data-lab-close") === "true";
        if (shouldClose) closeLabNav();
      });
    }

    function renderDossier(key) {
      const d = dossiers && dossiers[key];
      if (!d) return;

      if (dossierTitle) dossierTitle.textContent = d.title || "Lab Dossier";
      if (dossierSubtitle) dossierSubtitle.textContent = d.subtitle || "";
      if (dossierStatus) dossierStatus.textContent = d.status || "READY";
      if (dossierBody) dossierBody.textContent = d.body || "";

      if (dossierEvidence) {
        dossierEvidence.innerHTML = "";
        const items = Array.isArray(d.evidence) ? d.evidence : [];
        if (items.length) {
          items.forEach((item) => {
            const li = document.createElement("li");
            li.textContent = item;
            dossierEvidence.appendChild(li);
          });
        } else {
          const li = document.createElement("li");
          li.className = "text-gray-500";
          li.textContent = "No evidence items provided.";
          dossierEvidence.appendChild(li);
        }
      }

      if (dossierPrimary) {
        dossierPrimary.textContent = d.primary?.label || "Open";
        dossierPrimary.onclick = typeof d.primary?.action === "function" ? d.primary.action : null;
      }

      if (dossierSecondary) {
        dossierSecondary.textContent = d.secondary?.label || "View Note";
        dossierSecondary.onclick = typeof d.secondary?.action === "function" ? d.secondary.action : null;
      }

      if (dossierMeta) {
        const u = d.updated || "—";
        dossierMeta.innerHTML = `Last updated: <span class="text-gray-300">${u}</span>`;
      }
    }

    // Bind dossier node clicks (if nodes exist on the page)
    document.querySelectorAll(".lab-node").forEach((btn) => {
      btn.addEventListener("click", () => {
        const key = btn.getAttribute("data-dossier");
        renderDossier(key);
      });
    });

    // Global ESC behavior: close open modals if present
    document.addEventListener("keydown", (e) => {
      if (e.key !== "Escape") return;
      const accessModal = q("access-modal");
      if (isShown(labNav)) closeLabNav();
      if (isShown(accessModal)) toggleModal(accessModal, false);
    });

    renderDossier(defaultKey || "start");
    return { openLabNav, closeLabNav, renderDossier, labNav };
  }

  // Export public API (library only; no auto-init to avoid duplication)
  window.SilentPattern = {
    toggleModal,
    initVanta,
    setupAccessModal,
    setupLabNavigator
  };
})();