// strip.js - shared plumbing for every GLiNER 2.5 demo page.
// 1. __sign shim: private HF Spaces sign the iframe URL; Safari/incognito block
//    the third-party cookie, so carry the token on same-origin API requests.
// 2. readiness poll: drives the model strip (loading -> preparing -> ready).
// 3. fetchConfig(): title/subtitle/examples, so the page is data-driven.

(() => {
  const sign = new URLSearchParams(location.search).get("__sign");
  if (!sign) return;
  const orig = self.fetch.bind(self);
  self.fetch = (input, init) => {
    try {
      const u = new URL(typeof input === "string" ? input : input.url, location.href);
      if (u.origin === location.origin && !u.searchParams.has("__sign")) {
        u.searchParams.set("__sign", sign);
        input = u.toString();
      }
    } catch (e) { /* non-URL input: pass through */ }
    return orig(input, init);
  };
})();

function stripSet(message, tone, pct) {
  const strip = document.getElementById("model-strip");
  const pill = document.getElementById("status-pill");
  const status = document.getElementById("status");
  if (!strip || !status) return;  // demo page removed the strip; nothing to update
  status.textContent = message;
  strip.className = `model-strip is-${tone}`;
  if (pill) pill.className = `status-pill is-${tone}`;
  if (pct != null) {
    const bar = document.getElementById("load-progress");
    if (bar) bar.style.width = `${pct}%`;
  }
}

async function waitForServer() {
  stripSet("Connecting", "loading", 12);
  for (let attempt = 0; attempt < 300; attempt++) {
    try {
      const r = await fetch("api/ready", { cache: "no-store" });
      if (r.ok && (await r.json()).ready) return true;
    } catch (e) { /* still starting */ }
    stripSet("Warming up", "loading", Math.min(92, 12 + attempt * 4));
    await new Promise((r) => setTimeout(r, 1000));
  }
  return false;
}

async function fetchConfig() {
  const r = await fetch("api/config", { cache: "no-store" });
  return r.json();
}