"use strict";

// Layer: entity-runtime/items/lifecycle-step
// Owns per-item frame bookkeeping that is common across item types: age,
// zunchi spawn grace, and delayed drop impact handling.
(function (global) {
  function update(item, dt, worldRef) {
    if (!item || item.dead) return { done: true };
    item.age += dt;
    if (item.type === "zunchi") item.spawnGrace = Math.max(0, (item.spawnGrace || 0) - dt);
    if (item.type === "toilet") item.toiletFlash = Math.max(0, (item.toiletFlash || 0) - dt * 1.8);
    if (item.dropTimer > 0) {
      const beforeDrop = item.dropTimer;
      item.dropTimer = Math.max(0, item.dropTimer - dt);
      if (beforeDrop > 0 && item.dropTimer <= 0 && !item.dropImpactDone) {
        item.dropImpactDone = true;
        if (worldRef?.itemDropImpact) worldRef.itemDropImpact(item);
      }
    }
    return { done: false };
  }

  global.TarinaiItemFrameLifecycleStep = Object.freeze({ update });
})(typeof window !== "undefined" ? window : globalThis);