"use strict";

// Layer: entity-runtime/items/decay-system
// Owns passive amount decay for water, food, transient traces, splats,
// and ant corpses. The lifecycle step is now only a
// thin pipeline adapter.
(function (global) {
  const MEDICINE_LIKE_FOOD_TYPES = Object.freeze([
    "sweet", "love_mochi", "fight_mochi", "sleep_drug", "laxative", "protein",
    "niteropu", "ammo", "mystery_drug", "mercury", "giant_drug", "dwarf_drug", "zunda_juice",
  ]);

  function decayServingFood(item, dt, worldRef) {
    if (!isServingFoodType(item.type)) return false;
    const interval = passiveFoodDecayInterval(worldRef);
    item.passiveFoodDecayTimer = (item.passiveFoodDecayTimer || 0) + dt;
    let changed = false;
    let ticks = 0;
    while (item.passiveFoodDecayTimer >= interval && ticks < 3) {
      item.passiveFoodDecayTimer -= interval;
      ticks++;
      if (Number.isFinite(item.foodServingsRemaining)) {
        const before = Math.max(0, item.foodServingsRemaining || 0);
        const lost = Math.min(before, interval * passiveFoodDecayRate(item));
        if (lost > 0) {
          changed = true;
          item.foodServingsRemaining = Math.max(0, before - lost);
          item.amount = item.foodServingsRemaining;
          const resized = (typeof updateServingFoodVisualSize === "function" ? updateServingFoodVisualSize(item) : false);
          if (resized) {
            worldRef?.markItemBucketsDirty?.("food-passive-resize");
            worldRef?.markSpatialDirty?.("food-passive-resize");
            if (worldRef) worldRef.drawListDirty = true;
          }
          worldRef?.markTerrainDirty?.("food-passive-decay");
          if (item.foodServingsRemaining <= 0.015) item.amount = 0;
        }
      } else if (MEDICINE_LIKE_FOOD_TYPES.includes(item.type)) {
        const before = item.amount || 0;
        const lost = Math.min(before, interval * 0.12);
        item.amount -= lost;
        if (lost > 0) {
          changed = true;
          worldRef?.markTerrainDirty?.("food-passive-decay");
        }
      }
    }
    return changed;
  }

  function update(item, dt, worldRef) {
    if (!item || item.dead) return { done: true };
    if (item.type === "water") item.amount -= dt * 0.9;
    decayServingFood(item, dt, worldRef);
    if (item.type === "trace") item.amount -= dt * 1.35;
    if (item.type === "splat") item.amount -= dt * 1.05;
    if (item.type === "ant_corpse") item.amount -= dt * 0.018;
    return { done: false };
  }

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