"use strict";

// Layer: simulation/system-items-ants
// Owns scheduled item updates, random grass growth, ball/ant spatial refresh,
// and item/ant spatial post-processing.
(function (global) {
  const helpers = () => global.TarinaiSimulationRuntime?.helpers || {};

  function updateRandomGrassGrowth(worldRef, dt) {
    if (!worldRef || !global.TarinaiGrass) return false;
    if ((worldRef.groundGrassMultiplier?.() ?? 1) <= 0) return false;
    const groundGrowthMul = Math.max(0, Number(global.TarinaiGround?.grassGrowthMultiplier?.(worldRef.groundType || "soil") ?? (worldRef.groundGrassMultiplier?.() ?? 1)) || 0);
    if (groundGrowthMul <= 0) return false;
    worldRef.grassGrowthTimer = (worldRef.grassGrowthTimer || 0) + dt;
    const field = worldRef.fieldType || "garden";
    const growthSpeedMul = 6.0 * groundGrowthMul;
    const interval = (field === "park" ? 1.8 : (field === "cage" ? 3.2 : 2.4)) / Math.max(0.1, growthSpeedMul);
    if (worldRef.grassGrowthTimer < interval) return false;
    worldRef.grassGrowthTimer = 0;
    const grasses = worldRef.itemsOfType ? worldRef.itemsOfType("grass") : (worldRef.items || []).filter(it => it && it.type === "grass");
    if (!grasses || !grasses.length) return false;
    const tries = Math.min(12, grasses.length);
    for (let i = 0; i < tries; i++) {
      const it = grasses[Math.floor(Math.random() * grasses.length)];
      if (!it || it.dead || (it.amount || 0) <= 0) continue;
      if (worldRef.grassBlockedAt?.(it.x, it.y, it)) {
        if (global.TarinaiGrass.regress(it, 1) > 0) {
          worldRef.markTerrainDirtyAt?.(it.x, it.y, Math.max(it.r || 24, 36), "random-grass-blocked") || worldRef.markTerrainDirty?.("random-grass-blocked");
          worldRef.markItemBucketsDirty?.("random-grass-blocked");
          return true;
        }
        continue;
      }
      if (global.TarinaiGrass.advance(it, 1)) {
        worldRef.markTerrainDirtyAt?.(it.x, it.y, Math.max(it.r || 24, 36), "random-grass-grow") || worldRef.markTerrainDirty?.("random-grass-grow");
        return true;
      }
    }
    return false;
  }

  function updateItemsAndAnts(worldRef, dt) {
    const h = helpers();
    const itemCountBefore = worldRef.items.length;
    h.updateItemsScheduled?.(worldRef, dt);
    updateRandomGrassGrowth(worldRef, dt);
    const itemsMoved = h.markScheduledItemsMoved?.(worldRef, "items-moved", 0.25) || false;
    if (worldRef.itemCounts?.ball) {
      worldRef.ensureSpatial?.("ball-ball-collisions");
      worldRef.resolveBallBallCollisions(dt);
      worldRef.markSpatialDirty?.("ball-ball-collisions");
    }
    worldRef.updateAnts?.(dt);
    const antsMoved = h.markSpatialDirtyIfMoved?.(worldRef, worldRef.ants || [], "ants-moved", 0.25) || false;
    if (itemsMoved || antsMoved || worldRef.spatialDirty) worldRef.ensureSpatial?.("post-mobile-item-update");
    return { itemCountBefore, itemsMoved, antsMoved };
  }

  const phases = Object.freeze({ updateItemsAndAnts });
  const helpersApi = Object.freeze({ updateRandomGrassGrowth });

  global.TarinaiItemAntSimulationSystem = Object.freeze({ phases, helpers: helpersApi });
})(typeof window !== "undefined" ? window : globalThis);