(() => {
  const root = document.querySelector("[data-lumi-ai]");
  if (!root) return;
  const endpoint = root.dataset.endpoint;
  const panel = root.querySelector("[data-lumi-ai-panel]");
  const toggle = root.querySelector("[data-lumi-ai-toggle]");
  const close = root.querySelector("[data-lumi-ai-close]");
  const state = root.querySelector("[data-lumi-ai-state]");
  const status = root.querySelector("[data-lumi-ai-status]");
  const messages = root.querySelector("[data-lumi-ai-messages]");
  const form = root.querySelector("[data-lumi-ai-form]");
  const input = form.querySelector("textarea");

  const setOpen = (open) => {
    if (open) positionPanel();
    panel.classList.toggle("open", open);
    panel.setAttribute("aria-hidden", String(!open));
    toggle.setAttribute("aria-expanded", String(open));
    if (open) input.focus();
  };
  const positionPanel = () => {
    const viewportHeight = window.innerHeight;
    const desiredHeight = Math.max(180, viewportHeight / 6);
    const footerRect = document.querySelector(".site-footer")?.getBoundingClientRect();
    const bottomLimit = footerRect && footerRect.top < viewportHeight && footerRect.bottom > 0
      ? Math.max(8, footerRect.top - 8)
      : viewportHeight - 8;
    const anchor = toggle.getBoundingClientRect();
    let top = anchor.bottom + 8;
    if (top + desiredHeight > bottomLimit) {
      const overflow = top + desiredHeight - bottomLimit;
      top -= overflow / 2;
      if (top + desiredHeight > bottomLimit) top = bottomLimit - desiredHeight;
    }
    top = Math.max(8, Math.min(top, viewportHeight - desiredHeight - 8));
    panel.style.setProperty("--lumi-ai-top", `${top}px`);
    panel.style.height = `${Math.min(desiredHeight, viewportHeight - top - 8)}px`;
  };
  const addMessage = (text, type, confirmation) => {
    const item = document.createElement("div");
    item.className = `lumi-ai-message ${type}`;
    item.textContent = text;
    if (confirmation) {
      const actions = document.createElement("div");
      actions.className = "lumi-ai-confirm";
      for (const [label, route] of [["Confirm", "confirm"], ["Cancel", "cancel"]]) {
        const button = document.createElement("button");
        button.type = "button";
        button.textContent = label;
        button.addEventListener("click", async () => {
          button.disabled = true;
          try {
            const response = await fetch(`${endpoint}/assistant/${route}`, {
              method: "POST", headers: { "Content-Type": "application/json" },
              body: JSON.stringify({ id: confirmation.id })
            });
            const data = await response.json();
            if (!response.ok) throw new Error(data.error || "Action failed.");
            addMessage(route === "confirm" ? "Confirmed and completed." : "Cancelled.", "assistant");
            actions.remove();
          } catch (error) { addMessage(error.message, "assistant error"); }
        });
        actions.append(button);
      }
      item.append(actions);
    }
    messages.append(item);
    messages.scrollTop = messages.scrollHeight;
  };
  const refreshStatus = async () => {
    try {
      const response = await fetch(`${endpoint}/api/status`);
      const data = await response.json();
      const ready = response.ok && data.enabled && data.runtime?.healthy;
      state.className = `lumi-ai-state ${ready ? "ready" : "error"}`;
      if (ready) status.textContent = `${data.model_id} ready`;
      else if (!data.enabled) status.textContent = "Disabled by administrator";
      else if (!data.runtime?.runtime_installed) status.textContent = "Runtime not installed";
      else if (!data.runtime?.model_downloaded) status.textContent = "Selected model missing";
      else if (data.runtime?.state === "error") status.textContent = "Runtime error";
      else status.textContent = "Runtime stopped";
    } catch {
      state.className = "lumi-ai-state error";
      status.textContent = "Status unavailable";
    }
  };
  toggle.addEventListener("click", () => setOpen(!panel.classList.contains("open")));
  close.addEventListener("click", () => setOpen(false));
  form.addEventListener("submit", async (event) => {
    event.preventDefault();
    const message = input.value.trim();
    if (!message) return;
    addMessage(message, "user");
    input.value = "";
    input.disabled = true;
    try {
      const response = await fetch(`${endpoint}/assistant/message`, {
        method: "POST", headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ message })
      });
      const data = await response.json();
      if (!response.ok) throw new Error(data.error || "Request failed.");
      addMessage(data.text, "assistant", data.confirmation);
    } catch (error) {
      addMessage(error.message, "assistant error");
    } finally {
      input.disabled = false;
      input.focus();
    }
  });
  input.addEventListener("keydown", (event) => {
    if (event.key === "Enter" && !event.shiftKey) {
      event.preventDefault();
      form.requestSubmit();
    }
  });
  window.addEventListener("resize", () => {
    if (panel.classList.contains("open")) positionPanel();
  });
  refreshStatus();
  window.setInterval(refreshStatus, 15000);
})();