"use strict";

(function (global) {
  const World = global.World;
  if (!World) throw new Error("World is not available for mixin: world_spatial_budget.js");

  function liveCount(list) {
    let count = 0;
    for (const item of list || []) if (item && !item.dead) count += 1;
    return count;
  }

  Object.defineProperties(World.prototype, Object.getOwnPropertyDescriptors({
  performanceLevel() {
    if (window.TarinaiPerformance) return window.TarinaiPerformance.level || 0;
    const fps = typeof window !== "undefined" ? Number(window.__tarinaiFps || 0) : 60;
    if (!fps || !Number.isFinite(fps)) return 0;
    if (fps < 22) return 3;
    if (fps < 34) return 2;
    if (fps < 48) return 1;
    return 0;
  },

  performanceQuality() {
    return window.TarinaiPerformance?.quality?.(this) || { level: this.performanceLevel(), antStride: 1, effectLimit: CONFIG.effectLimit ?? 96 };
  },

  grassLoadLevel() {
    const grass = this.itemCounts?.grass || 0;
    const perf = this.performanceLevel();
    if (perf >= 3 || grass >= 180) return 3;
    if (perf >= 2 || grass >= 120) return 2;
    if (perf >= 1 || grass >= 72) return 1;
    return 0;
  },

  grassUpdateFactor() {
    return [1.0, 1.35, 1.85, 2.45][this.grassLoadLevel()] || 1.0;
  },

  sortedDrawList() {
    if (!this.drawList) this.drawList = [];
    const antCount = liveCount(this.ants);
    const tarinaiCount = liveCount(this.tarinai);
    if (this.drawListDirty || this.drawList.length !== tarinaiCount + antCount) {
      this.drawList.length = 0;
      for (const t of this.tarinai || []) if (t && !t.dead) this.drawList.push(t);
      for (const a of this.ants || []) if (a && !a.dead) this.drawList.push(a);
      this.drawList.sort((a, b) => (a.y || 0) - (b.y || 0));
      this.drawListDirty = false;
    }
    return this.drawList;
  },

  nearbyItems(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.itemCells, x, y, radius, this.spatialItemScratch, precise);
  },

  nearbyTarinai(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.tarinaiCells, x, y, radius, this.spatialTarinaiScratch, precise);
  },

  nearbyAnts(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.antCells, x, y, radius, this.spatialAntScratch, precise);
  },

  nearbyObstacles(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.obstacleCells, x, y, radius, this.spatialObstacleScratch, precise);
  },

  nearbyFood(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.foodCells, x, y, radius, this.spatialFoodScratch, precise);
  },

  nearbyHazards(x, y, radius, precise = false) {
    return this.spatial.nearby(this.spatial.hazardCells, x, y, radius, this.spatialHazardScratch, precise);
  },

  rebuildSpatial(force = false) {
    this.spatial.rebuild(this.items, this.tarinai, this.ants || []);
    this.spatialDirty = false;
    this.spatialVersion = (this.spatialVersion || 0) + 1;
  },

  updateItemCounts() {
    const counts = this.itemCounts;
    for (const key of Object.keys(counts)) counts[key] = 0;
    for (const it of this.items) counts[it.type] = (counts[it.type] || 0) + 1;
  },

  updateEffectCounts() {
    const counts = this.effectCounts;
    for (const key of Object.keys(counts)) counts[key] = 0;
    for (const ef of this.effects) counts[ef.type] = (counts[ef.type] || 0) + 1;
  },

  compactItems() {
    this.enforceItemBudget();
    const before = this.items.length;
    let write = 0;
    for (let read = 0; read < this.items.length; read++) {
      const it = this.items[read];
      if (it.type === "mirror") continue;
      if (!it.dead) this.items[write++] = it;
    }
    this.items.length = write;
    const changed = before !== this.items.length;
    if (changed) {
      this.markSpatialDirty?.("compact-items");
      this.markTerrainDirty?.("compact-items");
    }
    return changed;
  },

  enforceItemBudget() {
    const pruneOldest = (type, limit) => {
      if (!Number.isFinite(limit) || limit < 0) return;
      let count = 0;
      for (const it of this.items) if (it.type === type && !it.dead) count += 1;
      if (count <= limit) return;
      const victims = this.items
        .filter(it => it.type === type && !it.dead)
        .sort((a, b) => (b.age || 0) - (a.age || 0))
        .slice(0, count - limit);
      for (const it of victims) it.amount = 0;
    };
    pruneOldest("zunchi", CONFIG.zunchiLimit ?? 56);
    pruneOldest("trace", CONFIG.traceLimit ?? 64);
    pruneOldest("splat", CONFIG.splatLimit ?? 48);
    pruneOldest("grass", this.grassLimit ? this.grassLimit() : (CONFIG.grassLimit ?? 96));
    const fenceLimit = this.fenceLimit ? this.fenceLimit() : (CONFIG.fenceLimit ?? 72);
    const liveFences = this.liveFenceCount ? this.liveFenceCount() : 0;
    if (liveFences > fenceLimit) {
      const victims = this.items
        .filter(it => this.isFenceType?.(it.type) && !it.dead)
        .sort((a, b) => (b.age || 0) - (a.age || 0))
        .slice(0, liveFences - fenceLimit);
      for (const it of victims) it.amount = 0;
    }
  
    const limit = CONFIG.itemLimit ?? Infinity;
    if (!Number.isFinite(limit) || this.items.length <= limit) return;
    const priority = { trace: 1, splat: 2, zunchi: 3, water: 4, grass: 5, sweet: 6, firecracker: 7, fence_v: 8, fence_h: 8 };
    const removable = this.items
      .filter(it => !it.dead && (priority[it.type] || 99) < 99)
      .sort((a, b) => (priority[a.type] || 99) - (priority[b.type] || 99) || (b.age || 0) - (a.age || 0));
    let extra = this.items.length - limit;
    for (const it of removable) {
      if (extra <= 0) break;
      it.amount = 0;
      extra -= 1;
    }
  },

  compactEffects() {
    const limit = this.performanceQuality?.().effectLimit ?? CONFIG.effectLimit ?? 96;
    if (Number.isFinite(limit) && this.effects.length > limit) {
      this.effects.sort((a, b) => (a.life / Math.max(a.maxLife || 1, 0.001)) - (b.life / Math.max(b.maxLife || 1, 0.001)));
      const remove = this.effects.length - limit;
      for (let i = 0; i < remove; i++) this.effects[i].life = 0;
    }
    let write = 0;
    for (let read = 0; read < this.effects.length; read++) {
      const ef = this.effects[read];
      if (!ef.dead) this.effects[write++] = ef;
    }
    this.effects.length = write;
  },

  compactTarinai() {
    let write = 0;
    for (let read = 0; read < this.tarinai.length; read++) {
      const t = this.tarinai[read];
      if (!t.dead) this.tarinai[write++] = t;
    }
    if (this.tarinai.length !== write) this.drawListDirty = true;
    this.tarinai.length = write;
  },

  compactAnts() {
    if (!this.ants) this.ants = [];
    let write = 0;
    for (let read = 0; read < this.ants.length; read++) {
      const a = this.ants[read];
      if (a && !a.dead) this.ants[write++] = a;
    }
    if (this.ants.length !== write) this.drawListDirty = true;
    this.ants.length = write;
  }
  }));
})(typeof window !== "undefined" ? window : globalThis);