const textarea = document.getElementById("editor");
const status = document.getElementById("status");
const error = document.getElementById("error");
const currentUser = document.getElementById("username").innerHTML;
const path = window.location.pathname;

// === ROUTE PARSING ===
let mode = "private";
let fetchUrl = "";
let editable = true;
let last = "";

if (path.startsWith("/public/")) {
  const username = path.split("/")[2];
  fetchUrl = "/publicapi/" + username;
  editable = (currentUser === username);
  mode = "public";
} else if (path === "/board") {
  fetchUrl = "/boardapi";
  mode = "shared";
  editable = true;
} else if (path.startsWith("/n/") || path.startsWith("/notes/")) {
  const note = path.split("/").pop();
  fetchUrl = "/api/" + note;
  editable = true;
} else {
  error.textContent = "Unsupported path: " + path;
  textarea.disabled = true;
  throw new Error("Unknown path: " + path);
}

if (!editable) textarea.disabled = true;

// === FETCH INITIAL CONTENT ===
fetch(fetchUrl)
  .then(res => {
    if (!res.ok) throw new Error("Failed to load. Status: " + res.status);
    return res.text();
  })
  .then(text => {
    textarea.value = text;
    last = text;
    status.textContent = "Loaded";
  })
  .catch(err => {
    error.textContent = "Error loading content: " + err.message;
    status.textContent = "Load failed";
  });

// === AUTOSAVE LOGIC ===
let timeout;

textarea.addEventListener("input", () => {
  if (!editable) return;
  status.textContent = "Typing...";
  clearTimeout(timeout);
  timeout = setTimeout(() => {
    const text = textarea.value;
    if (text !== last) {
      fetch(fetchUrl, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ content: text })
      })
      .then(async res => {
        if (res.ok) {
          last = text;
          status.textContent = "Saved";
        } else {
          const msg = await res.text();
          status.textContent = "Save failed: " + msg;
        }
      })
      .catch(err => {
        status.textContent = "Save failed: " + err.message;
      });
    } else {
      status.textContent = "No changes";
    }
  }, 500);
});