bot-model.js

'use strict';

const fs = require('fs');
const path = require('path');

const ts = () => new Date().toISOString().replace('T', ' ').slice(0, 19);
const log = (tag, msg) => console.log(`[${ts()}] [AI] ${tag}  ${msg}`);

const FEATURES = [
  // أساسيات (5)
  'health','food','y_level','xp_level','time_of_day',
  // البيئة (7)
  'biome','dimension','light_level','is_raining','can_see_sky',
  'is_in_water','is_on_lava',
  // البلوكات حوله (5)
  'block_below','block_above','is_on_ladder','is_in_shelter',
  'is_in_danger',
  // الموبات والأغراض (3)
  'mobs_nearby','danger_mobs','items_nearby',
  // الاحتياطي (6)
  'inventory_pct','has_weapon','has_pickaxe','has_axe',
  'has_shield','has_bow',
  // الدروع والطعام (5)
  'has_chestplate','has_boots','has_food','has_bed','has_torches',
  // الموارد (5)
  'has_logs','has_stone','has_iron_raw','has_diamond_raw','has_building_blocks',
  // حالة + اجتماعي (4)
  'player_nearby','bot_count','is_sleeping','is_sprinting',
  // اتجاهات البلوكات (8)
  'block_north','block_south','block_east','block_west',
  'block_north2','block_south2','block_east2','block_west2',
  // عدادات الموارد (8)
  'count_logs','count_stone','count_iron','count_gold','count_diamond','count_coal','count_food_items','count_torches',
  // مستويات الأدوات (4)
  'pickaxe_level','axe_level','sword_level','shovel_level',
  // دروع (2)
  'total_armor','has_extra_shield',
  // تضاريس (2)
  'terrain_flatness','elevation_change',
  // قرب ماء/حمم (2)
  'near_water','near_lava',
  // وقت منذ الضرر (2)
  'time_since_hurt','is_thundering',
  // بورتال/ستراكتشر (3)
  'portal_nearby','structure_nearby','y_relative_surface',
  // أدوات الإند (4)
  'has_obsidian','has_flint_steel','has_ender_pearl','has_blaze_rod',
  // حيوانات وقرويون (2)
  'animals_nearby','villagers_nearby',
  // المساحة (3)
  'explored_radius','trees_nearby','flowers_nearby',
];

const ACTIONS = [
  // أساسيات (25)
  'WANDER','EXPLORE','COLLECT','MINE','CRAFT','BUILD_SHELTER','LIGHT_AREA','FIGHT','FLEE',
  'EAT','SLEEP','SWIM','CHAT','EMOTE','FOLLOW','HELP_ALLY','TRADE','SMELT','EQUIP_ARMOR',
  'GO_HOME','FARM','IDLE','JUMP','LOOK_AROUND','SPRINT',
  // بناء (5)
  'BUILD_PATH','BUILD_BRIDGE','BUILD_WALL','PLACE_DOOR','PLACE_LADDER',
  // تعدين متقدم (4)
  'MINE_IRON','MINE_GOLD','MINE_DIAMOND','MINE_OBSIDIAN',
  // كرافت متقدم (5)
  'CRAFT_ENCHANT_TABLE','CRAFT_ANVIL','CRAFT_BREWING_STAND','CRAFT_BED','CRAFT_BOAT',
  // نذر (3)
  'ENTER_NETHER','EXPLORE_NETHER','FIGHT_BLAZE',
  // إند (2)
  'ENTER_END','FIGHT_DRAGON',
  // زراعة (5)
  'PLANT_CROP','HARVEST_CROP','FISH','SHEAR','MILK',
  // قرية (1)
  'SLEEP_AT_VILLAGE',
  // محادثة متقدمة (5)
  'CHAT_GREETING','CHAT_STATUS','CHAT_THANK','CHAT_QUESTION','CHAT_ALERT',
  // تفكير (1)
  'THINK',
];

const SEQ_LEN = 50;
const INPUT_DIM = FEATURES.length;

const FEATURE_MINMAX = {
  'health':[0,20],'food':[0,20],'y_level':[-64,320],'xp_level':[0,100],'time_of_day':[0,24000],
  'biome':[0,14],'dimension':[0,2],'light_level':[0,15],'is_raining':[0,1],'can_see_sky':[0,1],
  'is_in_water':[0,1],'is_on_lava':[0,1],
  'block_below':[0,80],'block_above':[0,100],'is_on_ladder':[0,1],'is_in_shelter':[0,1],'is_in_danger':[0,1],
  'mobs_nearby':[0,8],'danger_mobs':[0,5],'items_nearby':[0,10],
  'inventory_pct':[0,100],'has_weapon':[0,1],'has_pickaxe':[0,1],'has_axe':[0,1],'has_shield':[0,1],'has_bow':[0,1],
  'has_chestplate':[0,1],'has_boots':[0,1],'has_food':[0,1],'has_bed':[0,1],'has_torches':[0,1],
  'has_logs':[0,1],'has_stone':[0,1],'has_iron_raw':[0,1],'has_diamond_raw':[0,1],'has_building_blocks':[0,1],
  'player_nearby':[0,1],'bot_count':[0,4],'is_sleeping':[0,1],'is_sprinting':[0,1],
  // اتجاهات البلوكات (8)
  'block_north':[0,99],'block_south':[0,99],'block_east':[0,99],'block_west':[0,99],
  'block_north2':[0,99],'block_south2':[0,99],'block_east2':[0,99],'block_west2':[0,99],
  // عدادات الموارد (8)
  'count_logs':[0,64],'count_stone':[0,64],'count_iron':[0,64],'count_gold':[0,64],
  'count_diamond':[0,64],'count_coal':[0,64],'count_food_items':[0,64],'count_torches':[0,64],
  // مستويات الأدوات (4)
  'pickaxe_level':[0,5],'axe_level':[0,5],'sword_level':[0,5],'shovel_level':[0,5],
  // دروع (2)
  'total_armor':[0,20],'has_extra_shield':[0,1],
  // تضاريس (2)
  'terrain_flatness':[0,10],'elevation_change':[-10,10],
  // قرب ماء/حمم (2)
  'near_water':[0,1],'near_lava':[0,1],
  // وقت منذ الضرر (2)
  'time_since_hurt':[0,1000],'is_thundering':[0,1],
  // بورتال/ستراكتشر (3)
  'portal_nearby':[0,1],'structure_nearby':[0,5],'y_relative_surface':[-64,100],
  // أدوات الإند (4)
  'has_obsidian':[0,1],'has_flint_steel':[0,1],'has_ender_pearl':[0,1],'has_blaze_rod':[0,1],
  // حيوانات وقرويون (2)
  'animals_nearby':[0,5],'villagers_nearby':[0,3],
  // المساحة (3)
  'explored_radius':[0,500],'trees_nearby':[0,10],'flowers_nearby':[0,5],
};

// تصنيفات للميزات التي تحتاج معايرة
const BLOCK_TYPES = {
  'stone':1,'cobblestone':2,'dirt':3,'grass_block':4,'grass':4,
  'sand':5,'gravel':6,'water':7,'lava':8,'bedrock':9,
  'oak_log':10,'spruce_log':10,'birch_log':10,'jungle_log':10,
  'acacia_log':10,'dark_oak_log':10,'mangrove_log':10,'cherry_log':10,
  'oak_planks':11,'spruce_planks':11,'birch_planks':11,
  'glass':12,'glass_pane':12,'coal_ore':13,'iron_ore':14,
  'gold_ore':15,'diamond_ore':16,'redstone_ore':17,'lapis_ore':18,
  'air':0,'cave_air':0,'void_air':0,
  // بناء إضافي
  'deepslate':19,'andesite':20,'diorite':21,'granite':22,'tuff':23,
  'cobbled_deepslate':24,'calcite':25,'dripstone_block':26,'moss_block':27,
  'oak_leaves':28,'spruce_leaves':28,'birch_leaves':28,
  'stone_bricks':29,'mossy_stone_bricks':29,'cracked_stone_bricks':29,
  'bricks':30,'nether_bricks':31,'red_nether_bricks':31,
  // خامات متقدمة
  'netherite_block':32,'ancient_debris':33,
  'copper_ore':34,'emerald_ore':35,
  'obsidian':36,'crying_obsidian':36,
  // بورتال وستراكتشر
  'nether_portal':37,'end_portal':37,'end_gateway':37,
  'spawner':38,'chest':39,'ender_chest':39,
  'furnace':40,'blast_furnace':40,'smoker':40,
  'crafting_table':41,'enchanting_table':42,'anvil':43,
  'brewing_stand':44,'beacon':45,
  // نباتات
  'oak_sapling':46,'spruce_sapling':46,'wheat':47,'wheat_seeds':47,
  'carrots':48,'potatoes':49,'beetroots':50,
  'dandelion':51,'poppy':51,'cornflower':51,'azure_bluet':51,
  'tall_grass':52,'fern':52,'dead_bush':52,
  'vine':53,'lily_pad':54,'sugar_cane':55,'cactus':56,
  'pumpkin':57,'melon':58,
  // أضواء
  'torch':59,'lantern':59,'soul_torch':59,'soul_lantern':59,
  'glowstone':60,'shroomlight':60,'sea_lantern':60,
  // بنايات
      'ladder':61,'scaffolding':62,
  'oak_door':63,'spruce_door':63,'iron_door':63,
  'oak_fence':64,'spruce_fence':64,'nether_brick_fence':64,
  'oak_slab':65,'spruce_slab':65,'stone_slab':65,
  'oak_stairs':66,'spruce_stairs':66,'cobblestone_stairs':66,
  // أرضيات
  'snow_block':67,'ice':68,'blue_ice':68,'packed_ice':68,
  'clay':69,'mud':70,'podzol':70,'mycelium':70,
  // نذر
  'netherrack':71,'soul_sand':72,'soul_soil':72,
  'crimson_nylium':73,'warped_nylium':73,
  'basalt':74,'blackstone':75,
  'crimson_stem':76,'warped_stem':76,
  'shroomlight':77,
  // إند
  'end_stone':78,'end_stone_bricks':78,
  'purpur_block':79,'purpur_pillar':79,
  'chorus_plant':80,'chorus_flower':80,
};

const BIOME_MAP = {
  'plains':0,'forest':1,'dark_forest':1,'wooded_hills':1,
  'desert':2,'taiga':3,'swamp':4,'ocean':5,'river':6,
  'jungle':7,'savanna':8,'badlands':9,'mountains':10,
  'mountain':10,'stony_peaks':10,'cave':11,'dripstone_caves':11,
  'lush_caves':11,'nether_wastes':12,'soul_sand_valley':12,
  'crimson_forest':12,'warped_forest':12,'the_end':13,'end':13,
};

const DIM_MAP = { 'minecraft:overworld':0, 'minecraft:the_nether':1, 'minecraft:the_end':2 };

class ContextManager {
  constructor(maxLen) {
    this.maxLen = maxLen || SEQ_LEN;
    this.buffer = [];
  }

  addState(state) {
    this.buffer.push({ ...state });
    if (this.buffer.length > this.maxLen) this.buffer.shift();
  }

  getContextTensor() {
    const total = this.maxLen * INPUT_DIM;
    const data = new Float32Array(total);
    for (let i = 0; i < this.maxLen; i++) {
      const bufIdx = this.buffer.length - this.maxLen + i;
      const state = bufIdx >= 0 ? this.buffer[bufIdx] : null;
      for (let j = 0; j < INPUT_DIM; j++) {
        const raw = state ? (state[FEATURES[j]] ?? 0) : 0;
        const mm = FEATURE_MINMAX[FEATURES[j]];
        data[i * INPUT_DIM + j] = mm ? (raw - mm[0]) / (mm[1] - mm[0]) : 0;
      }
    }
    return data;
  }

  reset() { this.buffer = []; }
  get length() { return this.buffer.length; }
}

class BotModel {
  constructor() {
    this.session = null;
    this.inputName = 'float_input';
    this.loaded = false;
    this.fallbackAction = 1; // EXPLORE
    this.stats = { predictions: 0, fallbacks: 0, avgTime: 0 };
    this._modelPath = null;
    this.context = new ContextManager(SEQ_LEN);
  }

  async loadFromHF(username, repoName, fileName = 'best_model.onnx') {
    const repo = repoName && repoName.includes('/') ? repoName : `${username}/${repoName}`;
    const url = `https://huggingface.co/${repo}/resolve/main/${fileName}`;
    const localPath = path.join(__dirname, 'cache', fileName);

    // Try local cache first
    if (fs.existsSync(localPath)) {
      const stat = fs.statSync(localPath);
      if (stat.size > 50 * 1024 * 1024) {
        log('💾', `وجد cache محلي (${(stat.size / 1024 / 1024).toFixed(1)} MB)`);
        const ok = await this.loadLocal(localPath);
        if (ok) return true;
        log('🔄', 'cache تالف، إعادة تحميل...');
      } else {
        log('⚠️', 'cache صغير جداً (>50MB متوقع)، إعادة تحميل');
      }
    }

    const maxAttempts = 3;
    for (let attempt = 0; attempt < maxAttempts; attempt++) {
      log('⬇️', `تحميل النموذج... (محاولة ${attempt+1}/${maxAttempts})`);
      try {
        const controller = new AbortController();
        const timeoutId = setTimeout(() => controller.abort(), 600000);
        const resp = await fetch(url, { signal: controller.signal });
        clearTimeout(timeoutId);
        if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
        const contentLength = parseInt(resp.headers.get('content-length') || '0', 10);
        let downloaded = 0;
        const reader = resp.body.getReader();
        const chunks = [];
        while (true) {
          const { done, value } = await reader.read();
          if (done) break;
          chunks.push(value);
          downloaded += value.length;
          if (contentLength > 0) {
            const pct = (downloaded / contentLength * 100).toFixed(0);
            if (downloaded % (10 * 1024 * 1024) < value.length) {
              log('⬇️', `${pct}% (${(downloaded / 1024 / 1024).toFixed(1)} MB)`);
            }
          }
        }
        const buffer = Buffer.concat(chunks);
        if (buffer.length < 50 * 1024 * 1024) {
          log('⚠️', `ملف صغير جداً (${(buffer.length / 1024 / 1024).toFixed(1)} MB) — يتلف؟`);
        }
        fs.mkdirSync(path.join(__dirname, 'cache'), { recursive: true });
        fs.writeFileSync(localPath, buffer);
        log('✅', `تم التحميل (${(buffer.length / 1024 / 1024).toFixed(1)} MB)`);
        const ok = await this.loadLocal(localPath);
        if (ok) return true;
        try { fs.unlinkSync(localPath); } catch(_) {}
        log('🔄', 'إعادة المحاولة...');
      } catch (err) {
        log('⚠️', `فشل تحميل النموذج: ${err.message}`);
        if (attempt < maxAttempts - 1) {
          const wait = (attempt + 1) * 10000;
          log('⏳', `انتظار ${wait/1000}ث قبل إعادة المحاولة...`);
          await new Promise(r => setTimeout(r, wait));
        }
      }
    }
    log('❌', `فشل تحميل النموذج بعد ${maxAttempts} محاولات`);
    return false;
  }

  _softmax(logits) {
    if (!logits || logits.length === 0) return [];
    const max = Math.max(...logits);
    const exps = logits.map(v => Math.exp(v - max));
    const sum = exps.reduce((a, b) => a + b, 0);
    return sum > 0 ? exps.map(v => v / sum) : exps;
  }

  async loadLocal(filePath) {
    try {
      const ort = require('onnxruntime-node');
      this._modelPath = filePath;
      let sessionOpts = { executionProviders: ['dml', 'cpu'], interOpNumThreads: 4, intraOpNumThreads: 4, graphOptimizationLevel: 'all' };
      try {
        this.session = await ort.InferenceSession.create(filePath, sessionOpts);
      } catch (_) {
        this.session = await ort.InferenceSession.create(filePath, { executionProviders: ['cpu'], interOpNumThreads: 4, intraOpNumThreads: 4, graphOptimizationLevel: 'all' });
      }
      if (this.session.inputNames) {
        this.inputName = this.session.inputNames[0];
      } else {
        this.inputName = this.session.inputs[0].name;
      }
      this.loaded = true;
      log('🧠', `نموذج AI جاهز (Input: ${this.inputName})`);
      this.context.reset();
      return true;
    } catch (err) {
      log('❌', `فشل تحميل النموذج المحلي: ${err.message}`);
      return false;
    }
  }

  extractState(bot) {
    if (!bot || !bot.entity) return null;

    const pos = bot.entity.position;
    const inv = bot.inventory.items();
    const entities = Object.values(bot.entities || {});
    const time = bot.time ? bot.time.timeOfDay : 0;

    // ─── البيئة ───
    let biome = 0;
    try {
      const b = bot.world.biomeAt ? bot.world.biomeAt(pos) : null;
      if (b) biome = biomeAt(b.id || b.name || b);
    } catch (_) {}

    let dimension = 0;
    try { dimension = DIM_MAP[bot.game.dimension] ?? 0; } catch (_) {}

    let lightLevel = 0;
    try {
      const block = bot.blockAt(pos);
      if (block) lightLevel = block.skyLight ?? block.light ?? 0;
    } catch (_) {}

    const isRaining = bot.isRaining ? 1 : 0;
    let canSeeSky = 1;
    try {
      for (let y = pos.y + 1; y < 256; y++) {
        const b = bot.blockAt(pos.offset(0, y - pos.y, 0));
        if (b && b.name !== 'air' && b.name !== 'cave_air' && b.name !== 'void_air') {
          canSeeSky = 0; break;
        }
      }
    } catch (_) { canSeeSky = 0; }

    const isInWater = bot.entity.isInWater ? 1 : 0;

    let isOnLava = 0;
    try {
      const below = bot.blockAt(pos.offset(0, -1, 0));
      if (below && (below.name.includes('lava') || below.name.includes('fire'))) isOnLava = 1;
    } catch (_) {}

    const isSprinting = bot.entity.isSprinting ? 1 : 0;

    // ─── البلوكات حوله ───
    let blockBelow = 0, blockAbove = 0, isOnLadder = 0, isInShelter = 0;
    try {
      const bBelow = bot.blockAt(pos.offset(0, -1, 0));
      if (bBelow) {
        blockBelow = BLOCK_TYPES[bBelow.name] ?? 0;
        if (bBelow.name.includes('ladder')) isOnLadder = 1;
      }

      const bAbove = bot.blockAt(pos.offset(0, 1, 0));
      if (bAbove) blockAbove = BLOCK_TYPES[bAbove.name] ?? (['air','cave_air','void_air'].includes(bAbove.name) ? 0 : 99);

      // فحص المأوى: هل هناك بلوك فوق الرأس؟
      for (let y = 1; y <= 3; y++) {
        const b = bot.blockAt(pos.offset(0, y, 0));
        if (b && !['air','cave_air','void_air'].includes(b.name)) { isInShelter = 1; break; }
      }
    } catch (_) {}

    // ─── الموبات والأغراض ───
    let mobsNearby = 0, dangerMobs = 0, itemsNearby = 0;
    for (const e of entities) {
      if (!e || e === bot.entity) continue;
      const d = pos.distanceTo(e.position);
      if (d > 10) continue;
      if (e.type === 'mob') {
        mobsNearby++;
        const mobName = (e.mobType || e.name || '').toLowerCase();
        if (['zombie','skeleton','creeper','spider','enderman',
            'witch','phantom','drowned','husk','stray','blaze',
            'piglin','zombified piglin'].includes(mobName)) {
          dangerMobs++;
        }
      }
      if (e.type === 'object') itemsNearby++;
    }

    // ─── خطر ───
    let isInDanger = 0;
    if (dangerMobs > 0) {
      for (const e of entities) {
        if (!e || e === bot.entity || e.type !== 'mob') continue;
        if (pos.distanceTo(e.position) < 6) { isInDanger = 1; break; }
      }
    }
    if (isOnLava || (pos.y < -10)) isInDanger = 1;

    // ─── المخزون ───
    const invPct = Math.min(100, Math.round(inv.length / 36 * 100));
    const hasWeapon = inv.some(i => i.name.includes('sword') || i.name.includes('axe')) ? 1 : 0;
    const hasPickaxe = inv.some(i => i.name.includes('pickaxe')) ? 1 : 0;
    const hasAxe = inv.some(i => i.name.includes('axe') && !i.name.includes('pickaxe')) ? 1 : 0;
    const hasShield = inv.some(i => i.name.includes('shield')) ? 1 : 0;
    const hasBow = inv.some(i => i.name.includes('bow')) ? 1 : 0;

    const hasChestplate = inv.some(i => i.name.includes('chestplate')) ? 1 : 0;
    const hasBoots = inv.some(i => i.name.includes('boots')) ? 1 : 0;
    const hasFood = inv.some(i => ['apple','bread','cooked_beef','cooked_porkchop','cooked_chicken',
      'baked_potato','carrot','golden_carrot','beetroot','melon_slice',
      'cooked_mutton','cooked_cod','cooked_salmon','steak','porkchop',
      'mushroom_stew','suspicious_stew'].includes(i.name)) ? 1 : 0;
    const hasBed = inv.some(i => i.name.includes('bed')) ? 1 : 0;
    const hasTorches = inv.some(i => i.name.includes('torch')) ? 1 : 0;

    const hasLogs = inv.some(i => i.name.includes('_log') || i.name === 'log') ? 1 : 0;
    const hasStone = inv.some(i => ['cobblestone','stone','andesite','diorite','granite','deepslate','tuff'].includes(i.name)) ? 1 : 0;
    const hasIronRaw = inv.some(i => i.name.includes('raw_iron') || i.name === 'iron_ingot') ? 1 : 0;
    const hasDiamondRaw = inv.some(i => i.name.includes('diamond')) ? 1 : 0;
    const hasBuildingBlocks = inv.some(i => ['cobblestone','stone','oak_planks','spruce_planks','birch_planks',
      'dirt','sand','gravel','deepslate'].includes(i.name)) ? 1 : 0;

    // ─── لاعبون ───
    const playerNearby = Object.keys(bot.players).filter(n => n !== bot.username).length > 0 ? 1 : 0;
    const botCount = Math.max(0, Object.keys(bot.players).length - 1);

    const isSleeping = bot.isSleeping ? 1 : 0;

    // ─── اتجاهات البلوكات (NSEW + NSEW2) ───
    let blockNorth = 0, blockSouth = 0, blockEast = 0, blockWest = 0;
    let blockNorth2 = 0, blockSouth2 = 0, blockEast2 = 0, blockWest2 = 0;
    try {
      const bN = bot.blockAt(pos.offset(0, 0, -1)); if (bN) blockNorth = BLOCK_TYPES[bN.name] ?? 0;
      const bS = bot.blockAt(pos.offset(0, 0, 1)); if (bS) blockSouth = BLOCK_TYPES[bS.name] ?? 0;
      const bE = bot.blockAt(pos.offset(1, 0, 0)); if (bE) blockEast = BLOCK_TYPES[bE.name] ?? 0;
      const bW = bot.blockAt(pos.offset(-1, 0, 0)); if (bW) blockWest = BLOCK_TYPES[bW.name] ?? 0;
      const bN2 = bot.blockAt(pos.offset(0, 0, -2)); if (bN2) blockNorth2 = BLOCK_TYPES[bN2.name] ?? 0;
      const bS2 = bot.blockAt(pos.offset(0, 0, 2)); if (bS2) blockSouth2 = BLOCK_TYPES[bS2.name] ?? 0;
      const bE2 = bot.blockAt(pos.offset(2, 0, 0)); if (bE2) blockEast2 = BLOCK_TYPES[bE2.name] ?? 0;
      const bW2 = bot.blockAt(pos.offset(-2, 0, 0)); if (bW2) blockWest2 = BLOCK_TYPES[bW2.name] ?? 0;
    } catch (_) {}

    // ─── عدادات المواد في المخزون ───
    let countLogs = 0, countStone = 0, countIron = 0, countGold = 0;
    let countDiamond = 0, countCoal = 0, countFoodItems = 0, countTorches = 0;
    for (const i of inv) {
      if (i.name.includes('_log') || i.name === 'log') countLogs += i.count;
      if (['cobblestone','stone','andesite','diorite','granite','deepslate','tuff'].includes(i.name)) countStone += i.count;
      if (i.name.includes('raw_iron') || i.name === 'iron_ingot' || i.name.includes('iron_')) countIron += i.count;
      if (i.name.includes('raw_gold') || i.name === 'gold_ingot' || i.name.includes('gold_')) countGold += i.count;
      if (i.name.includes('diamond')) countDiamond += i.count;
      if (i.name === 'coal' || i.name.includes('coal_')) countCoal += i.count;
      if (['apple','bread','cooked_beef','cooked_porkchop','cooked_chicken','cooked_cod','cooked_salmon',
        'baked_potato','carrot','golden_carrot','beetroot','melon_slice','cooked_mutton','steak',
        'porkchop','mushroom_stew','suspicious_stew','beef','chicken','cod','salmon',
        'potato','sweet_berries','cookie','pumpkin_pie','rabbit_stew','dried_kelp',
        'chorus_fruit','enchanted_golden_apple','golden_apple','rotten_flesh'].includes(i.name)) countFoodItems += i.count;
      if (i.name.includes('torch')) countTorches += i.count;
    }

    // ─── مستويات الأدوات ───
    const toolTier = name => {
      if (name.includes('netherite')) return 5;
      if (name.includes('diamond')) return 4;
      if (name.includes('iron')) return 3;
      if (name.includes('stone')) return 2;
      if (name.includes('wooden')) return 1;
      return 0;
    };
    let pickaxeLevel = 0, axeLevel = 0, swordLevel = 0, shovelLevel = 0;
    for (const i of inv) {
      if (i.name.includes('pickaxe')) pickaxeLevel = Math.max(pickaxeLevel, toolTier(i.name));
      if (i.name.includes('axe') && !i.name.includes('pickaxe')) axeLevel = Math.max(axeLevel, toolTier(i.name));
      if (i.name.includes('sword')) swordLevel = Math.max(swordLevel, toolTier(i.name));
      if (i.name.includes('shovel')) shovelLevel = Math.max(shovelLevel, toolTier(i.name));
    }

    // ─── الدروع ───
    let totalArmor = 0;
    let hasExtraShield = 0;
    for (const i of inv) {
      if (i.name.includes('helmet')) totalArmor += 2;
      if (i.name.includes('chestplate')) totalArmor += 6;
      if (i.name.includes('leggings')) totalArmor += 5;
      if (i.name.includes('boots')) totalArmor += 2;
      if (i.name.includes('shield')) hasExtraShield++;
    }
    if (hasExtraShield > 1) hasExtraShield = 1;

    // ─── التضاريس ───
    let terrainFlatness = 0, elevationChange = 0;
    try {
      let minY = 999, maxY = -999;
      for (let dx = -2; dx <= 2; dx++) {
        for (let dz = -2; dz <= 2; dz++) {
          const b = bot.blockAt(pos.offset(dx, -1, dz));
          if (b && b.name !== 'air') {
            const by = Math.floor(pos.y + (dx === 0 && dz === 0 ? 0 : 0));
            minY = Math.min(minY, by);
            maxY = Math.max(maxY, by);
          }
        }
      }
      if (minY < 999) terrainFlatness = maxY - minY;
      elevationChange = Math.round(pos.y - 64);
    } catch (_) {}

    // ─── ماء/حمم قريبة ───
    let nearWater = 0, nearLava = 0;
    for (let dx = -4; dx <= 4; dx++) {
      for (let dz = -4; dz <= 4; dz++) {
        for (let dy = -2; dy <= 2; dy++) {
          const b = bot.blockAt(pos.offset(dx, dy, dz));
          if (!b) continue;
          if (b.name.includes('water') || b.name === 'water') nearWater = 1;
          if (b.name.includes('lava') || b.name === 'lava') nearLava = 1;
        }
      }
    }

    // ─── البورتالات والهياكل ───
    let portalNearby = 0, structureNearby = 0;
    let yRelativeSurface = Math.round(pos.y - 64);
    for (let dx = -8; dx <= 8; dx++) {
      for (let dz = -8; dz <= 8; dz++) {
        for (let dy = -3; dy <= 3; dy++) {
          const b = bot.blockAt(pos.offset(dx, dy, dz));
          if (!b) continue;
          if (b.name.includes('portal') || b.name.includes('gateway')) portalNearby = 1;
          if (['chest','ender_chest','crafting_table','furnace','enchanting_table',
            'anvil','brewing_stand','beacon'].includes(b.name)) structureNearby++;
        }
      }
    }
    if (structureNearby > 5) structureNearby = 5;

    // ─── أدوات النذر والإند ───
    const hasObsidian = inv.some(i => i.name.includes('obsidian')) ? 1 : 0;
    const hasFlintSteel = inv.some(i => i.name.includes('flint') && i.name.includes('steel') || i.name === 'flint_and_steel') ? 1 : 0;
    const hasEnderPearl = inv.some(i => i.name.includes('ender_pearl')) ? 1 : 0;
    const hasBlazeRod = inv.some(i => i.name.includes('blaze_rod')) ? 1 : 0;

    // ─── الحيوانات والقرويون ───
    let animalsNearby = 0, villagersNearby = 0;
    for (const e of entities) {
      if (!e || e === bot.entity || e.type !== 'mob') continue;
      const d = pos.distanceTo(e.position);
      if (d > 10) continue;
      const mobName = (e.name || e.displayName || e.mobType || '').toLowerCase();
      if (['cow','sheep','pig','chicken','horse','donkey','mule','rabbit','goat',
        'llama','wolf','cat','ocelot','fox','bee','strider'].includes(mobName)) animalsNearby++;
      if (mobName === 'villager' || mobName === 'wandering_trader') villagersNearby++;
    }

    // ─── الأشجار والزهور ───
    let treesNearby = 0, flowersNearby = 0;
    for (let dx = -5; dx <= 5; dx++) {
      for (let dz = -5; dz <= 5; dz++) {
        for (let dy = -2; dy <= 2; dy++) {
          const b = bot.blockAt(pos.offset(dx, dy, dz));
          if (!b) continue;
          if (b.name.includes('_log') || b.name === 'log' || b.name.includes('_leaves') || b.name === 'leaves') treesNearby++;
          if (['dandelion','poppy','cornflower','azure_bluet','allium','oxeye_daisy',
            'lily_of_the_valley','wither_rose','sunflower','lilac','peony','rose_bush',
            'blue_orchid','tulip'].includes(b.name)) flowersNearby++;
        }
      }
    }
    if (treesNearby > 10) treesNearby = 10;
    if (flowersNearby > 5) flowersNearby = 5;

    return {
      health: Math.round(bot.health || 20),
      food: Math.round(bot.food || 20),
      y_level: Math.round(pos.y),
      xp_level: Math.round((bot.experience?.level || 0)),
      time_of_day: Math.round(time),

      biome,
      dimension,
      light_level: lightLevel,

      is_raining: isRaining,
      can_see_sky: canSeeSky,
      is_in_water: isInWater,
      is_on_lava: isOnLava,

      block_below: blockBelow,
      block_above: blockAbove,
      is_on_ladder: isOnLadder,
      is_in_shelter: isInShelter,
      is_in_danger: isInDanger,

      mobs_nearby: mobsNearby,
      danger_mobs: dangerMobs,
      items_nearby: itemsNearby,

      inventory_pct: invPct,
      has_weapon: hasWeapon,
      has_pickaxe: hasPickaxe,
      has_axe: hasAxe,
      has_shield: hasShield,
      has_bow: hasBow,

      has_chestplate: hasChestplate,
      has_boots: hasBoots,
      has_food: hasFood,
      has_bed: hasBed,
      has_torches: hasTorches,

      has_logs: hasLogs,
      has_stone: hasStone,
      has_iron_raw: hasIronRaw,
      has_diamond_raw: hasDiamondRaw,
      has_building_blocks: hasBuildingBlocks,

      player_nearby: playerNearby,
      bot_count: botCount,
      is_sleeping: isSleeping,
      is_sprinting: isSprinting,

      // اتجاهات
      block_north: blockNorth, block_south: blockSouth,
      block_east: blockEast, block_west: blockWest,
      block_north2: blockNorth2, block_south2: blockSouth2,
      block_east2: blockEast2, block_west2: blockWest2,

      // عدادات
      count_logs: countLogs, count_stone: countStone,
      count_iron: countIron, count_gold: countGold,
      count_diamond: countDiamond, count_coal: countCoal,
      count_food_items: countFoodItems, count_torches: countTorches,

      // مستويات الأدوات
      pickaxe_level: pickaxeLevel, axe_level: axeLevel,
      sword_level: swordLevel, shovel_level: shovelLevel,

      // دروع
      total_armor: totalArmor, has_extra_shield: hasExtraShield,

      // تضاريس
      terrain_flatness: terrainFlatness, elevation_change: elevationChange,

      // ماء/حمم
      near_water: nearWater, near_lava: nearLava,

      // وقت منذ الضرر ورعد
      time_since_hurt: Math.min(1000, Math.floor((Date.now() - (bot._lastHurtTime || Date.now())) / 1000)),
      is_thundering: (bot.thunderState || bot.isThundering ? 1 : 0),

      // بورتال وستراكتشر
      portal_nearby: portalNearby, structure_nearby: structureNearby,
      y_relative_surface: Math.round(yRelativeSurface),

      // أدوات الإند
      has_obsidian: hasObsidian, has_flint_steel: hasFlintSteel,
      has_ender_pearl: hasEnderPearl, has_blaze_rod: hasBlazeRod,

      // حيوانات وقرويون
      animals_nearby: animalsNearby, villagers_nearby: villagersNearby,

      // مساحة
      explored_radius: Math.round(Math.min(500, (bot.exploredChunks ? Object.keys(bot.exploredChunks).length : 0) * 5)),
      trees_nearby: treesNearby, flowers_nearby: flowersNearby,
    };
  }

  async predict(state) {
    const start = Date.now();
    this.context.addState(state);

    if (!this.loaded || !this.session) {
      this.stats.fallbacks++;
      return this.fallbackAction;
    }

    try {
      const contextData = this.context.getContextTensor();
      const ort = require('onnxruntime-node');
      const tensor = new ort.Tensor('float32', contextData, [1, SEQ_LEN, INPUT_DIM]);

      const results = await this.session.run({ [this.inputName]: tensor });
      const values = Object.values(results);
      const actionData = values[0].data;
      const dirData = values.length > 1 ? values[1].data : null;

      let bestAction = 0;
      for (let i = 1; i < actionData.length; i++) {
        if (actionData[i] > actionData[bestAction]) bestAction = i;
      }

      let bestDir = 0;
      if (dirData) {
        for (let i = 1; i < dirData.length; i++) {
          if (dirData[i] > dirData[bestDir]) bestDir = i;
        }
      }

      this.stats.predictions++;
      this.stats.avgTime = (this.stats.avgTime * (this.stats.predictions - 1) + (Date.now() - start)) / this.stats.predictions;
      return { actionIdx: bestAction, dirIdx: bestDir };
    } catch (err) {
      log('⚠️', `Inference error: ${err.message}`);
      this.stats.fallbacks++;
      return this.fallbackAction;
    }
  }

  async predictActionName(state) {
    const result = await this.predict(state);
    const idx = typeof result === 'object' ? result.actionIdx : result;
    return ACTIONS[idx] || 'EXPLORE';
  }

  async predictDirection(state) {
    const result = await this.predict(state);
    return typeof result === 'object' ? result.dirIdx : 0;
  }

  getStats() {
    return {
      ...this.stats,
      loaded: this.loaded,
      modelPath: this._modelPath,
      contextLen: this.context.length,
    };
  }

  unload() {
    this.session = null;
    this.loaded = false;
    this.context.reset();
    log('🔴', 'نموذج AI: unloaded');
  }
}

// Helper لتحويل biome name/id إلى رقم
function biomeAt(val) {
  if (typeof val === 'number') return Math.min(val, 13);
  const name = String(val || '').toLowerCase().replace('minecraft:', '');
  return BIOME_MAP[name] ?? 0;
}

module.exports = { BotModel, ContextManager, FEATURES, ACTIONS, SEQ_LEN, INPUT_DIM, BLOCK_TYPES, FEATURE_MINMAX };