import "./style.css";

async function loadProvincesLocal() {
  const res = await fetch("./provinces.json", { cache: "no-store" });
  if (!res.ok) throw new Error("Không tải được provinces.json");
  return res.json();
}

function makeWorker(url) {
  return new Worker(new URL(url, import.meta.url), { type: "module" });
}

async function boot() {
  const el = document.querySelector("#app");
  el.innerHTML = `
    <div style="padding:16px;font-family:system-ui">
      <h2>CAD2MAP (Local-only)</h2>
      <div id="prov">Đang tải provinces...</div>
      <input id="file" type="file" />
      <div id="log" style="margin-top:12px;white-space:pre-wrap"></div>
    </div>
  `;

  const log = (s) => (document.querySelector("#log").textContent += s + "\n");

  // 1) Provinces local-only
  try {
    const p = await loadProvincesLocal();
    document.querySelector("#prov").textContent = `Provinces: ${p.length} (từ provinces.json, không cloud)`;
  } catch (e) {
    document.querySelector("#prov").textContent = "Lỗi tải provinces (local)";
    log(String(e));
  }

  // 2) Worker (parse client-side)
  const dxfWorker = makeWorker("./workers/dxf-parser-worker.js");

  document.querySelector("#file").addEventListener("change", async (ev) => {
    const f = ev.target.files?.[0];
    if (!f) return;

    const buf = await f.arrayBuffer();
    const id = crypto.randomUUID();
    dxfWorker.postMessage({ id, input: { fileName: f.name, buffer: buf } }, [buf]);

    dxfWorker.onmessage = (msgEv) => {
      const { success, error } = msgEv.data || {};
      if (!success) log("DXF worker: " + (error || "fail"));
      else log("DXF worker: OK");
    };
  });
}

boot();