// events page — list + title edit + detach-and-delete
// depends on: app.js

let eventOffset = 0;
let currentEvent = null;


async function loadEvents() {
  const data = await api(`/admin/api/events?limit=${PAGE}&offset=${eventOffset}`);
  const tbody = document.getElementById("eventTable");

  tbody.innerHTML = data.rows.map(r => `
    <tr>
      <td style="color:var(--muted-dark); font-size:12px">${r.id}</td>
      <td><span class="truncate" title="${escapeHtml(r.title)}">${escapeHtml(r.title)}</span></td>
      <td>${r.article_count}</td>
      <td style="color:var(--muted-dark); white-space:nowrap; font-size:12px">${r.created_at ? r.created_at.slice(0, 16) : "—"}</td>
      <td><button onclick='openEvent(${r.id}, ${JSON.stringify(r.title)})'>Edit</button></td>
    </tr>
  `).join("");

  const total = data.total;
  document.getElementById("ePageInfo").textContent =
    `${eventOffset + 1}–${Math.min(eventOffset + PAGE, total)} of ${total.toLocaleString()}`;
  document.getElementById("ePrevBtn").disabled = eventOffset === 0;
  document.getElementById("eNextBtn").disabled = eventOffset + PAGE >= total;
}


function openEvent(id, title) {
  currentEvent = { id, title };
  document.getElementById("em-title").value = title;
  document.getElementById("eventOverlay").classList.add("open");
}


document.addEventListener("DOMContentLoaded", () => {

  document.getElementById("ePrevBtn").onclick = () => { eventOffset = Math.max(0, eventOffset - PAGE); loadEvents(); };
  document.getElementById("eNextBtn").onclick = () => { eventOffset += PAGE; loadEvents(); };

  document.getElementById("eCancelBtn").onclick = () =>
    document.getElementById("eventOverlay").classList.remove("open");

  document.getElementById("eSaveBtn").onclick = async () => {
    if (!currentEvent) return;
    try {
      await api(`/admin/api/events/${currentEvent.id}`, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ title: document.getElementById("em-title").value }),
      });
      document.getElementById("eventOverlay").classList.remove("open");
      toast("Saved");
      loadEvents();
    } catch (e) { toast("Save failed", true); }
  };

  document.getElementById("eDeleteBtn").onclick = async () => {
    if (!currentEvent) return;
    if (!confirm(`Delete event #${currentEvent.id}? Articles will be detached but not deleted.`)) return;
    try {
      await api(`/admin/api/events/${currentEvent.id}`, { method: "DELETE" });
      document.getElementById("eventOverlay").classList.remove("open");
      toast("Event deleted");
      loadEvents();
      loadGlobalStats();
    } catch (e) { toast("Delete failed", true); }
  };


  loadEvents();
});