/* ============================================================================
   EXPORT & BOOTSTRAP
   `SERPENT` exposes internals for the console (runSelfTests), dev tooling and
   the headless test harness. Auto-boot only happens in a real browser.
   ========================================================================== */
const SERPENT = {
  CONFIG, PALETTES, ST,
  S, Store, U, Draft, CARDS,
  Input, Sfx, Grid, Physics, Pool,
  Snake, Weapons, Enemies, Pickups, Waves, FX, Cam, Background, Renderer,
  HUD, UI, Menu, Game, Dbg, Bot, DemoBrain,
  ACH_DEFS,
  utils: { TAU, clamp, lerp, angleDiff, wrapAngle, len, dist, dist2, norm, approach, makeRng, rng: () => rng },
  runSelfTests,
};
if (typeof window !== "undefined") window.SERPENT = SERPENT;
if (typeof globalThis !== "undefined") globalThis.SERPENT = SERPENT;

/* Browser entry point. The harness calls Game.init() manually instead. */
(function autoBoot() {
  if (typeof window === "undefined" || typeof document === "undefined") return;

  /* Any failure must be readable on the page itself, not just in DevTools. */
  function showFatal(msg) {
    if (typeof console !== "undefined") console.error(msg);
    try {
      let el = document.getElementById("s360err");
      if (!el) {
        el = document.createElement("div");
        el.id = "s360err";
        el.style.cssText = "position:fixed;left:12px;top:12px;z-index:99;max-width:80ch;" +
          "font:12px/1.5 monospace;color:#ff8d9a;background:rgba(12,0,4,.94);" +
          "border:1px solid #ff2e4d;padding:10px 12px;white-space:pre-wrap;";
        (document.body || document.documentElement).appendChild(el);
      }
      el.textContent = msg;
    } catch (_) { /* truly nothing left to do */ }
  }
  window.addEventListener("error", function (e) {
    showFatal("WINDOW ERROR\n" + (e && e.message ? e.message : String(e)) +
      "\n" + ((e && e.filename) || "") + ":" + ((e && e.lineno) | 0));
  });
  window.addEventListener("unhandledrejection", function (e) {
    showFatal("PROMISE REJECTION\n" + (e && e.reason ? e.reason : String(e)));
  });

  if (typeof requestAnimationFrame !== "function") {   // headless harness path
    return;
  }
  const cv = document.getElementById("game");
  const bootEl = document.getElementById("boot");
  if (!cv) { showFatal("#game canvas missing from the document"); return; }
  try {
    if (bootEl) bootEl.textContent = "BOOTING…";
    Game.init(cv);
    if (bootEl) bootEl.textContent = "";
    // first user gesture unlocks audio (autoplay policy)
    const unlock = () => Sfx.unlock();
    window.addEventListener("pointerdown", unlock);
    window.addEventListener("keydown", unlock);
  } catch (err) {
    showFatal("SERPENT 360 failed to boot:\n" + ((err && err.stack) || String(err)));
  }
})();

/*JS-END*/
</script>
</body>
</html>