/*
 * Decompiled with CFR 0.152.
 */
package com.vinlanx.explosionoverhaul;

import net.minecraft.core.registries.BuiltInRegistries;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import com.mojang.serialization.Codec;
import com.mojang.serialization.DataResult;
import com.mojang.serialization.DynamicOps;
import com.vinlanx.explosionoverhaul.Config;
import com.vinlanx.explosionoverhaul.ExplosionOverhaul;
import com.vinlanx.explosionoverhaul.PacketHandler;
import com.vinlanx.explosionoverhaul.ScanLoadPromptPacket;
import com.vinlanx.explosionoverhaul.ScanProgressPacket;
import com.vinlanx.explosionoverhaul.ScanPromptPacket;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.lang.reflect.Type;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileAttribute;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.atomic.LongAdder;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.GZIPInputStream;
import java.util.zip.InflaterInputStream;
import net.minecraft.core.BlockPos;
import net.minecraft.core.IdMap;
import net.minecraft.core.registries.Registries;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.nbt.ListTag;
import net.minecraft.nbt.NbtIo;
import net.minecraft.nbt.NbtOps;
import net.minecraft.resources.ResourceKey;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.ChunkPos;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.chunk.PalettedContainer;
import net.minecraft.world.level.storage.LevelResource;
import net.neoforged.neoforge.event.TickEvent;
import net.neoforged.neoforge.event.entity.player.PlayerEvent;
import net.neoforged.neoforge.event.level.BlockEvent;
import net.neoforged.neoforge.event.level.ChunkEvent;
import net.neoforged.neoforge.event.server.ServerStartedEvent;
import net.neoforged.neoforge.event.server.ServerStoppedEvent;
import net.neoforged.bus.api.SubscribeEvent;
import net.neoforged.fml.common.Mod;
import net.neoforged.fml.common.EventBusSubscriber;
import net.neoforged.neoforge.server.ServerLifecycleHooks;

@EventBusSubscriber
public class BlockIndexManager {
    private static volatile MinecraftServer currentServer;
    private static final Map<ResourceKey<Level>, ConcurrentHashMap<Long, Set<Long>>> indexByDimension;
    private static final ConcurrentLinkedQueue<ScanTask> chunkScanQueue;
    private static final Map<ResourceKey<Level>, Set<Long>> pendingChunkKeys;
    public static volatile boolean ENABLED;
    private static final boolean SCAN_ONLY_ON_START = true;
    private static volatile boolean INITIAL_SCAN_ENQUEUED;
    private static volatile int totalChunksToScan;
    private static volatile int chunksScanned;
    private static volatile boolean scanningComplete;
    private static volatile boolean abortCurrentScan;
    private static volatile int lampsFound;
    private static volatile int dripstonesFound;
    private static volatile int glassBlocksFound;
    private static volatile ResourceKey<Level> lastScannedDimension;
    private static volatile boolean waitingForUserInput;
    private static volatile ServerLevel pendingScanLevel;
    private static volatile ResourceKey<Level> currentScannedWorld;
    private static volatile boolean isSingleplayer;
    private static volatile boolean serverScanPromptShown;
    private static volatile boolean serverScanDecisionMade;
    private static volatile boolean isRescanMode;
    private static volatile ServerPlayer rescanRequestingPlayer;
    private static volatile boolean userDeclinedScan;
    private static volatile boolean waitingForLoadDecision;
    private static volatile boolean hasSaveFile;
    private static volatile String currentWorldId;
    private static final List<String> DEFAULT_REINFORCED_GLASS_BLACKLIST;
    private static final Path MOD_CONFIG_DIRECTORY;
    private static final Path GLASS_BLACKLIST_FILE;
    private static final CopyOnWriteArrayList<String> GLASS_BLACKLIST;
    private static final AtomicReference<Set<String>> GLASS_BLACKLIST_LOOKUP;

    private static ConcurrentHashMap<Long, Set<Long>> getOrCreateDimIndex(ServerLevel level) {
        ResourceKey dim = level.m_46472_();
        return indexByDimension.computeIfAbsent((ResourceKey<Level>)dim, k -> new ConcurrentHashMap());
    }

    private static Set<Long> getOrCreatePendingSet(ServerLevel level) {
        ResourceKey dim = level.m_46472_();
        return pendingChunkKeys.computeIfAbsent((ResourceKey<Level>)dim, k -> Collections.newSetFromMap(new ConcurrentHashMap()));
    }

    private static long chunkKey(ChunkPos cp) {
        return (long)cp.f_45578_ & 0xFFFFFFFFL | ((long)cp.f_45579_ & 0xFFFFFFFFL) << 32;
    }

    private static long packPos(BlockPos pos) {
        return pos.m_121878_();
    }

    private static BlockPos unpackPos(long packed) {
        return BlockPos.m_122022_((long)packed);
    }

    public static int getTotalChunksToScan() {
        return totalChunksToScan;
    }

    public static int getChunksScanned() {
        return chunksScanned;
    }

    public static float getScanProgress() {
        if (totalChunksToScan == 0) {
            return 1.0f;
        }
        return Math.min(1.0f, (float)chunksScanned / (float)totalChunksToScan);
    }

    public static boolean isScanningComplete() {
        return scanningComplete;
    }

    public static int getLampsFound() {
        return lampsFound;
    }

    public static int getDripstonesFound() {
        return dripstonesFound;
    }

    public static int getGlassBlocksFound() {
        return glassBlocksFound;
    }

    private static void clearScanDataSilent() {
        indexByDimension.clear();
        chunkScanQueue.clear();
        pendingChunkKeys.clear();
        totalChunksToScan = 0;
        chunksScanned = 0;
        scanningComplete = false;
        currentScannedWorld = null;
        lastScannedDimension = null;
        lampsFound = 0;
        dripstonesFound = 0;
        glassBlocksFound = 0;
    }

    private static void clearScanData() {
        BlockIndexManager.clearScanDataSilent();
        BlockIndexManager.sendProgressUpdate();
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: cleared all scan data for world switch");
    }

    private static void clearAndSaveData() {
        if (!indexByDimension.isEmpty() && scanningComplete) {
            try {
                MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
                if (server != null) {
                    BlockIndexManager.saveIndexData(server);
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: saved data before clearing");
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to save data before clearing: {}", (Object)e.getMessage());
            }
        }
        BlockIndexManager.clearScanData();
    }

    private static void startSingleplayerScan(ServerLevel level) {
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: starting singleplayer scan for ALL dimensions");
        BlockIndexManager.clearScanDataSilent();
        MinecraftServer server = level.m_7654_();
        BlockIndexManager.scanExistingChunksOnServer(server);
    }

    private static void startServerScan(MinecraftServer server) {
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: starting server-wide scan for all dimensions");
        BlockIndexManager.clearScanDataSilent();
        BlockIndexManager.scanExistingChunksOnServer(server);
    }

    private static void scanSingleWorld(ServerLevel level) {
        try {
            chunksScanned = 0;
            scanningComplete = false;
            lastScannedDimension = level.m_46472_();
            lampsFound = 0;
            dripstonesFound = 0;
            glassBlocksFound = 0;
            String dimensionName = level.m_46472_().m_135782_().toString();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: scanning existing chunks in world: {}", (Object)dimensionName);
            Set<ChunkPos> existingChunks = BlockIndexManager.getAllExistingChunks(level);
            totalChunksToScan = existingChunks.size();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: found {} chunks to scan", (Object)totalChunksToScan);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: using safe server-thread scanning for live chunks");
            BlockIndexManager.scanWithSingleThread(level, existingChunks);
        }
        catch (Exception ex) {
            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to start scan: {}", (Object)ex.toString());
        }
    }

    private static void scanWithSingleThread(ServerLevel level, Set<ChunkPos> existingChunks) {
        for (ChunkPos cp : existingChunks) {
            chunkScanQueue.add(new ScanTask((ResourceKey<Level>)level.m_46472_(), cp));
        }
        BlockIndexManager.sendProgressUpdate();
    }

    private static Set<ChunkPos> getAllExistingChunks(ServerLevel level) {
        Set<ChunkPos> existingChunks;
        block18: {
            existingChunks = Collections.newSetFromMap(new ConcurrentHashMap());
            try {
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: scanning for all existing chunks...");
                MinecraftServer server = level.m_7654_();
                String dimPath = level.m_46472_().m_135782_().m_135815_();
                Path worldPath = server.m_129843_(LevelResource.f_78182_);
                Path regionPath = "overworld".equals(dimPath) ? worldPath.resolve("region") : ("the_nether".equals(dimPath) ? worldPath.resolve("DIM-1").resolve("region") : ("the_end".equals(dimPath) ? worldPath.resolve("DIM1").resolve("region") : worldPath.resolve("dimensions").resolve(level.m_46472_().m_135782_().m_135827_()).resolve(level.m_46472_().m_135782_().m_135815_()).resolve("region")));
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: scanning region files in: {}", (Object)regionPath);
                if (Files.exists(regionPath, new LinkOption[0])) {
                    try (Stream<Path> regionFiles = Files.list(regionPath);){
                        List mcaFiles = regionFiles.filter(path -> path.toString().endsWith(".mca")).collect(Collectors.toList());
                        ExplosionOverhaul.LOGGER.info("BlockIndexManager: found {} .mca files in region directory", (Object)mcaFiles.size());
                        mcaFiles.parallelStream().forEach(regionFile -> {
                            block13: {
                                try {
                                    int chunksInThisRegion;
                                    int regionZ;
                                    int regionX;
                                    block14: {
                                        String[] parts;
                                        String fileName = regionFile.getFileName().toString();
                                        if (!fileName.startsWith("r.") || !fileName.endsWith(".mca") || (parts = fileName.substring(2, fileName.length() - 4).split("\\.")).length != 2) break block13;
                                        regionX = Integer.parseInt(parts[0]);
                                        regionZ = Integer.parseInt(parts[1]);
                                        chunksInThisRegion = 0;
                                        try (InputStream is = Files.newInputStream(regionFile, new OpenOption[0]);){
                                            byte[] header = new byte[4096];
                                            int bytesRead = is.read(header);
                                            if (bytesRead < 4096) break block14;
                                            for (int i = 0; i < 1024; ++i) {
                                                int offset = i * 4;
                                                int chunkOffset = (header[offset] & 0xFF) << 16 | (header[offset + 1] & 0xFF) << 8 | header[offset + 2] & 0xFF;
                                                if (chunkOffset <= 0) continue;
                                                int cx = i % 32;
                                                int cz = i / 32;
                                                int chunkX = regionX * 32 + cx;
                                                int chunkZ = regionZ * 32 + cz;
                                                ChunkPos cp = new ChunkPos(chunkX, chunkZ);
                                                existingChunks.add(cp);
                                                ++chunksInThisRegion;
                                            }
                                        }
                                        catch (Exception readEx) {
                                            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to read region file {}: {}", (Object)fileName, (Object)readEx.getMessage());
                                            for (int cx = 0; cx < 32; ++cx) {
                                                for (int cz = 0; cz < 32; ++cz) {
                                                    int chunkX = regionX * 32 + cx;
                                                    int chunkZ = regionZ * 32 + cz;
                                                    ChunkPos cp = new ChunkPos(chunkX, chunkZ);
                                                    existingChunks.add(cp);
                                                    ++chunksInThisRegion;
                                                }
                                            }
                                        }
                                    }
                                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: region {},{} - found {} existing chunks (read from .mca header)", new Object[]{regionX, regionZ, chunksInThisRegion});
                                }
                                catch (Exception e) {
                                    ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to parse region file {}: {}", (Object)regionFile.getFileName(), (Object)e.getMessage());
                                }
                            }
                        });
                    }
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: scanned region files and found {} existing chunks", (Object)existingChunks.size());
                    break block18;
                }
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: region directory not found: {}", (Object)regionPath);
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.error("BlockIndexManager: failed to scan world storage: {}", (Object)e.getMessage());
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: using fallback - estimate chunks from .mca files");
                try {
                    String dimPath = level.m_46472_().m_135782_().m_135815_();
                    MinecraftServer server = level.m_7654_();
                    Path worldPath = server.m_129843_(LevelResource.f_78182_);
                    Path regionPath = "overworld".equals(dimPath) ? worldPath.resolve("region") : ("the_nether".equals(dimPath) ? worldPath.resolve("DIM-1").resolve("region") : ("the_end".equals(dimPath) ? worldPath.resolve("DIM1").resolve("region") : worldPath.resolve("dimensions").resolve(level.m_46472_().m_135782_().m_135827_()).resolve(level.m_46472_().m_135782_().m_135815_()).resolve("region")));
                    if (!Files.exists(regionPath, new LinkOption[0])) break block18;
                    try (Stream<Path> regionFiles = Files.list(regionPath);){
                        regionFiles.filter(path -> path.toString().endsWith(".mca")).forEach(regionFile -> {
                            String[] parts;
                            String fileName = regionFile.getFileName().toString();
                            if (fileName.startsWith("r.") && fileName.endsWith(".mca") && (parts = fileName.substring(2, fileName.length() - 4).split("\\.")).length == 2) {
                                int regionX = Integer.parseInt(parts[0]);
                                int regionZ = Integer.parseInt(parts[1]);
                                for (int cx = 0; cx < 32; ++cx) {
                                    for (int cz = 0; cz < 32; ++cz) {
                                        int chunkX = regionX * 32 + cx;
                                        int chunkZ = regionZ * 32 + cz;
                                        ChunkPos cp = new ChunkPos(chunkX, chunkZ);
                                        existingChunks.add(cp);
                                    }
                                }
                                ExplosionOverhaul.LOGGER.info("BlockIndexManager: fallback added ~1024 chunks from region {},{}", (Object)regionX, (Object)regionZ);
                            }
                        });
                    }
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: fallback found {} estimated chunks", (Object)existingChunks.size());
                }
                catch (Exception fallbackEx) {
                    ExplosionOverhaul.LOGGER.error("BlockIndexManager: fallback also failed: {}", (Object)fallbackEx.getMessage());
                }
            }
        }
        return existingChunks;
    }

    private static void saveIndexDataAfterScan(MinecraftServer server) {
        try {
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Starting auto-save after scan completion...");
            BlockIndexManager.saveIndexData(server);
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to auto-save scan data: {}", (Object)e.getMessage());
            e.printStackTrace();
        }
    }

    private static void sendProgressUpdate() {
        try {
            ExplosionOverhaul.LOGGER.debug("sendProgressUpdate: {}/{} chunks, complete={}, L:{} D:{} G:{}", new Object[]{chunksScanned, totalChunksToScan, scanningComplete, lampsFound, dripstonesFound, glassBlocksFound});
            if (scanningComplete) {
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: sending final progress update to OP players - {}/{} chunks, lamps={}, dripstones={}, glass={}", new Object[]{chunksScanned, totalChunksToScan, lampsFound, dripstonesFound, glassBlocksFound});
            }
            ScanProgressPacket packet = new ScanProgressPacket(totalChunksToScan, chunksScanned, scanningComplete, lampsFound, dripstonesFound, glassBlocksFound);
            MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
            if (server != null) {
                for (ServerPlayer player : server.m_6846_().m_11314_()) {
                    if (!BlockIndexManager.isPlayerAuthorized(player)) continue;
                    PacketHandler.sendToPlayer(player, packet);
                }
            }
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to send scan progress update: {}", (Object)e.getMessage());
        }
    }

    private static void sendMultiThreadProgressUpdate(int currentProcessed, int currentLamps, int currentDripstones, int currentGlass) {
        try {
            ScanProgressPacket packet = new ScanProgressPacket(totalChunksToScan, currentProcessed, false, currentLamps, currentDripstones, currentGlass);
            MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
            if (server != null) {
                for (ServerPlayer player : server.m_6846_().m_11314_()) {
                    if (!BlockIndexManager.isPlayerAuthorized(player)) continue;
                    PacketHandler.sendToPlayer(player, packet);
                }
            }
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to send multi-thread progress update: {}", (Object)e.getMessage());
        }
    }

    private static void sendScanPromptPacket(ServerPlayer player) {
        try {
            ScanPromptPacket packet = new ScanPromptPacket(true);
            PacketHandler.sendToPlayer(player, packet);
            ExplosionOverhaul.LOGGER.info("Sent scan prompt to authorized player: {}", (Object)player.m_7755_().getString());
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to send scan prompt: {}", (Object)e.getMessage());
        }
    }

    public static void startManualScan() {
        if (BlockIndexManager.isChunkScanningDisabled()) {
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: manual scan cancelled - chunk scanning is disabled in config");
            BlockIndexManager.cancelManualScan();
            return;
        }
        if (waitingForUserInput && pendingScanLevel != null) {
            waitingForUserInput = false;
            serverScanDecisionMade = true;
            userDeclinedScan = false;
            if (isRescanMode) {
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: clearing data for rescan as user confirmed");
                BlockIndexManager.clearScanDataSilent();
                try {
                    MinecraftServer server = pendingScanLevel.m_7654_();
                    Path saveFile = BlockIndexManager.getSaveFilePath(server);
                    if (Files.exists(saveFile, new LinkOption[0])) {
                        Files.delete(saveFile);
                        ExplosionOverhaul.LOGGER.info("BlockIndexManager: deleted old save file for rescan");
                    }
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.warn("Failed to delete old save file: {}", (Object)e.getMessage());
                }
            }
            if (isSingleplayer || isRescanMode) {
                BlockIndexManager.startSingleplayerScan(pendingScanLevel);
            } else {
                BlockIndexManager.startServerScan(pendingScanLevel.m_7654_());
            }
            ServerPlayer requestingPlayer = rescanRequestingPlayer;
            pendingScanLevel = null;
            isRescanMode = false;
            rescanRequestingPlayer = null;
            try {
                if (requestingPlayer != null && requestingPlayer.m_6084_()) {
                    ScanPromptPacket packet = new ScanPromptPacket(false);
                    PacketHandler.sendToPlayer(requestingPlayer, packet);
                } else {
                    MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
                    if (server != null) {
                        for (ServerPlayer player : server.m_6846_().m_11314_()) {
                            if (!BlockIndexManager.isPlayerAuthorized(player)) continue;
                            ScanPromptPacket packet = new ScanPromptPacket(false);
                            PacketHandler.sendToPlayer(player, packet);
                        }
                    }
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to hide scan prompt: {}", (Object)e.getMessage());
            }
        }
    }

    /*
     * Unable to fully structure code
     */
    public static void loadExistingData() {
        if (BlockIndexManager.waitingForLoadDecision && BlockIndexManager.pendingScanLevel != null) {
            BlockIndexManager.waitingForLoadDecision = false;
            BlockIndexManager.serverScanDecisionMade = true;
            server = BlockIndexManager.pendingScanLevel.m_7654_();
            loaded = BlockIndexManager.loadIndexData(server);
            if (loaded) {
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: Successfully loaded existing scan data");
                BlockIndexManager.sendProgressUpdate();
                try {
                    currentServer = ServerLifecycleHooks.getCurrentServer();
                    if (currentServer != null) {
                        for (ServerPlayer serverPlayer : currentServer.m_6846_().m_11314_()) {
                            if (!BlockIndexManager.isPlayerAuthorized(serverPlayer)) continue;
                            packet = new ScanLoadPromptPacket(false);
                            PacketHandler.sendToPlayer(serverPlayer, packet);
                            ExplosionOverhaul.LOGGER.debug("Hidden load prompt for authorized player: {}", (Object)serverPlayer.m_7755_().getString());
                        }
                    }
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.warn("Failed to hide load prompt: {}", (Object)e.getMessage());
                }
            } else {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: Failed to load existing data, falling back to new scan");
                BlockIndexManager.startNewScan();
            }
            BlockIndexManager.pendingScanLevel = null;
        }
    }

    public static void startNewScan() {
        if (waitingForLoadDecision && pendingScanLevel != null) {
            waitingForLoadDecision = false;
            serverScanDecisionMade = true;
            userDeclinedScan = false;
            try {
                MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
                if (server != null) {
                    for (ServerPlayer serverPlayer : server.m_6846_().m_11314_()) {
                        if (!BlockIndexManager.isPlayerAuthorized(serverPlayer)) continue;
                        ScanLoadPromptPacket hideLoadPacket = new ScanLoadPromptPacket(false);
                        PacketHandler.sendToPlayer(serverPlayer, hideLoadPacket);
                        ScanPromptPacket showScanPacket = new ScanPromptPacket(true);
                        PacketHandler.sendToPlayer(serverPlayer, showScanPacket);
                        ExplosionOverhaul.LOGGER.debug("Switched prompts for authorized player: {}", (Object)serverPlayer.m_7755_().getString());
                    }
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to switch prompts: {}", (Object)e.getMessage());
            }
            waitingForUserInput = true;
            serverScanDecisionMade = false;
        }
    }

    public static void cancelManualScan() {
        if (waitingForUserInput) {
            waitingForUserInput = false;
            serverScanDecisionMade = true;
            userDeclinedScan = true;
            pendingScanLevel = null;
            ServerPlayer requestingPlayer = rescanRequestingPlayer;
            isRescanMode = false;
            rescanRequestingPlayer = null;
            chunkScanQueue.clear();
            totalChunksToScan = 0;
            chunksScanned = 0;
            scanningComplete = false;
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: manual scan cancelled by user - cleared scan queue");
            try {
                if (requestingPlayer != null && requestingPlayer.m_6084_()) {
                    ScanPromptPacket packet = new ScanPromptPacket(false);
                    PacketHandler.sendToPlayer(requestingPlayer, packet);
                } else {
                    MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
                    if (server != null) {
                        for (ServerPlayer player : server.m_6846_().m_11314_()) {
                            if (!BlockIndexManager.isPlayerAuthorized(player)) continue;
                            ScanPromptPacket packet = new ScanPromptPacket(false);
                            PacketHandler.sendToPlayer(player, packet);
                        }
                    }
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to hide scan prompt: {}", (Object)e.getMessage());
            }
        }
    }

    public static void resetScanState() {
        waitingForUserInput = false;
        waitingForLoadDecision = false;
        pendingScanLevel = null;
        serverScanPromptShown = false;
        serverScanDecisionMade = false;
        isRescanMode = false;
        rescanRequestingPlayer = null;
        userDeclinedScan = false;
        hasSaveFile = false;
        INITIAL_SCAN_ENQUEUED = false;
        BlockIndexManager.clearAndSaveData();
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: scan state reset by command");
    }

    public static void forceServerScan(MinecraftServer server) {
        BlockIndexManager.resetScanState();
        BlockIndexManager.startServerScan(server);
    }

    public static void forceSingleplayerScan(ServerLevel level) {
        BlockIndexManager.resetScanState();
        BlockIndexManager.startSingleplayerScan(level);
    }

    public static void showRescanPrompt(ServerPlayer player) {
        isRescanMode = true;
        waitingForUserInput = true;
        pendingScanLevel = player.m_284548_();
        rescanRequestingPlayer = player;
        serverScanPromptShown = true;
        serverScanDecisionMade = false;
        try {
            ScanPromptPacket packet = new ScanPromptPacket(true);
            PacketHandler.sendToPlayer(player, packet);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: showing rescan prompt to player: {}", (Object)player.m_7755_().getString());
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to send rescan prompt: {}", (Object)e.getMessage());
        }
    }

    private static void sendScanPromptPacket(boolean show) {
        try {
            MinecraftServer server = ServerLifecycleHooks.getCurrentServer();
            if (server != null) {
                for (ServerPlayer player : server.m_6846_().m_11314_()) {
                    if (!BlockIndexManager.isPlayerAuthorized(player)) continue;
                    ScanPromptPacket packet = new ScanPromptPacket(show);
                    PacketHandler.sendToPlayer(player, packet);
                    if (!show) continue;
                    ExplosionOverhaul.LOGGER.debug("Sent scan prompt to authorized player: {}", (Object)player.m_7755_().getString());
                }
            }
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to send scan prompt packet: {}", (Object)e.getMessage());
        }
    }

    private static boolean isGlassBlock(BlockState state) {
        try {
            String blockName = BuiltInRegistries.BLOCK.getKey(state.m_60734_()).toString().toLowerCase(Locale.ROOT);
            if (BlockIndexManager.isGlassProtected(blockName)) {
                return false;
            }
            return blockName.contains("glass");
        }
        catch (Exception e) {
            return state.m_60713_(Blocks.f_50058_) || state.m_60713_(Blocks.f_152498_);
        }
    }

    private static boolean isLampName(String name) {
        return "minecraft:redstone_lamp".equals(name);
    }

    private static boolean isDripstoneName(String name) {
        return "minecraft:pointed_dripstone".equals(name);
    }

    private static boolean isGlassName(String name) {
        if (name == null) {
            return false;
        }
        String normalized = name.toLowerCase(Locale.ROOT);
        return normalized.contains("glass") && !BlockIndexManager.isGlassProtected(normalized);
    }

    public static boolean isReinforcedGlass(BlockState state) {
        try {
            String blockName = BuiltInRegistries.BLOCK.getKey(state.m_60734_()).toString().toLowerCase(Locale.ROOT);
            return BlockIndexManager.isGlassProtected(blockName);
        }
        catch (Exception e) {
            return false;
        }
    }

    public static List<String> getReinforcedGlassBlacklist() {
        return new ArrayList<String>(GLASS_BLACKLIST);
    }

    public static List<String> getDefaultReinforcedGlassBlacklist() {
        return new ArrayList<String>(DEFAULT_REINFORCED_GLASS_BLACKLIST);
    }

    public static void setReinforcedGlassBlacklistFromList(List<String> list) {
        BlockIndexManager.applyGlassBlacklistList(list);
        BlockIndexManager.saveGlassBlacklistToJson();
    }

    private static void ensureModConfigDirectory() {
        try {
            Files.createDirectories(MOD_CONFIG_DIRECTORY, new FileAttribute[0]);
        }
        catch (IOException e) {
            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to create config directory for glass blacklist", (Throwable)e);
        }
    }

    private static void loadGlassBlacklistFromJson() {
        BlockIndexManager.ensureModConfigDirectory();
        Gson gson = new GsonBuilder().setPrettyPrinting().create();
        if (!Files.exists(GLASS_BLACKLIST_FILE, new LinkOption[0])) {
            BlockIndexManager.applyGlassBlacklistList(DEFAULT_REINFORCED_GLASS_BLACKLIST);
            BlockIndexManager.saveGlassBlacklistToJson();
            return;
        }
        try (BufferedReader reader = Files.newBufferedReader(GLASS_BLACKLIST_FILE);){
            List list = (List)gson.fromJson((Reader)reader, new TypeToken<List<String>>(){}.getType());
            if (list == null) {
                BlockIndexManager.applyGlassBlacklistList(DEFAULT_REINFORCED_GLASS_BLACKLIST);
                return;
            }
            BlockIndexManager.applyGlassBlacklistList(list);
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to load GlassBlacklist.json, falling back to defaults", (Throwable)e);
            BlockIndexManager.applyGlassBlacklistList(DEFAULT_REINFORCED_GLASS_BLACKLIST);
        }
    }

    private static void saveGlassBlacklistToJson() {
        BlockIndexManager.ensureModConfigDirectory();
        Gson gson = new GsonBuilder().setPrettyPrinting().create();
        try (BufferedWriter writer = Files.newBufferedWriter(GLASS_BLACKLIST_FILE, new OpenOption[0]);){
            gson.toJson(new ArrayList<String>(GLASS_BLACKLIST), (Appendable)writer);
        }
        catch (IOException e) {
            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to save GlassBlacklist.json", (Throwable)e);
        }
    }

    private static void applyGlassBlacklistList(List<String> list) {
        List<String> normalized = BlockIndexManager.normalizeBlacklist(list);
        GLASS_BLACKLIST.clear();
        GLASS_BLACKLIST.addAll(normalized);
        GLASS_BLACKLIST_LOOKUP.set(new HashSet<String>(normalized));
    }

    private static List<String> normalizeBlacklist(List<String> entries) {
        if (entries == null) {
            return new ArrayList<String>();
        }
        ArrayList<String> result = new ArrayList<String>();
        HashSet<String> seen = new HashSet<String>();
        for (String raw : entries) {
            String candidate;
            if (raw == null || (candidate = raw.trim().toLowerCase(Locale.ROOT)).isEmpty() || !seen.add(candidate)) continue;
            result.add(candidate);
        }
        return result;
    }

    private static boolean isGlassProtected(String name) {
        return GLASS_BLACKLIST_LOOKUP.get().contains(name);
    }

    private static String generateWorldId(MinecraftServer server) {
        try {
            Path worldPath = server.m_129843_(LevelResource.f_78182_);
            String worldName = server.m_129910_().m_5462_();
            String folderName = worldPath.getFileName().toString();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: World path: {}", (Object)worldPath);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: World name from level.dat: '{}'", (Object)worldName);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Folder name: '{}'", (Object)folderName);
            if (folderName == null || folderName.trim().isEmpty()) {
                folderName = "world";
            }
            if (worldName == null || worldName.trim().isEmpty()) {
                worldName = "Unknown";
            }
            String combined = folderName + "_" + worldName;
            String result = combined.replaceAll("[^a-zA-Z0-9_-]", "_").toLowerCase();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Generated world ID: '{}'", (Object)result);
            return result;
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("Failed to generate world ID, using fallback: {}", (Object)e.getMessage());
            String fallback = "unknown_world_" + System.currentTimeMillis();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Using fallback ID: '{}'", (Object)fallback);
            return fallback;
        }
    }

    private static Path getSaveFilePath(MinecraftServer server) {
        String worldId = BlockIndexManager.generateWorldId(server);
        Path configDir = server.m_129843_(LevelResource.f_78182_).getParent().resolve("config").resolve("explosionoverhaul");
        try {
            Files.createDirectories(configDir, new FileAttribute[0]);
            ExplosionOverhaul.LOGGER.debug("BlockIndexManager: Using config directory: {}", (Object)configDir);
        }
        catch (IOException e) {
            ExplosionOverhaul.LOGGER.error("Failed to create config directory: {}", (Object)e.getMessage());
        }
        Path saveFile = configDir.resolve("block_index_" + worldId + ".json");
        ExplosionOverhaul.LOGGER.debug("BlockIndexManager: Save file path: {}", (Object)saveFile);
        return saveFile;
    }

    public static void saveIndexData(MinecraftServer server) {
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: Attempting to save data...");
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: IndexByDimension size: {}", (Object)indexByDimension.size());
        try {
            Path saveFile = BlockIndexManager.getSaveFilePath(server);
            if (!scanningComplete) {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: Scan incomplete - deleting save file instead of saving corrupted data");
                if (Files.exists(saveFile, new LinkOption[0])) {
                    Files.delete(saveFile);
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: Deleted incomplete save file: {}", (Object)saveFile);
                }
                return;
            }
            if (indexByDimension.isEmpty()) {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: No data to save - index is empty!");
                return;
            }
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Saving to file: {}", (Object)saveFile);
            HashMap saveData = new HashMap();
            int totalBlocks = 0;
            for (Map.Entry<ResourceKey<Level>, ConcurrentHashMap<Long, Set<Long>>> dimEntry : indexByDimension.entrySet()) {
                String dimKey = dimEntry.getKey().m_135782_().toString();
                HashMap<String, Set<Long>> chunkMap = new HashMap<String, Set<Long>>();
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: Processing dimension: {}", (Object)dimKey);
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: Chunks in dimension: {}", (Object)dimEntry.getValue().size());
                for (Map.Entry<Long, Set<Long>> chunkEntry : dimEntry.getValue().entrySet()) {
                    Set<Long> blocks = chunkEntry.getValue();
                    if (blocks.isEmpty()) continue;
                    chunkMap.put(chunkEntry.getKey().toString(), blocks);
                    totalBlocks += blocks.size();
                }
                if (chunkMap.isEmpty()) continue;
                saveData.put(dimKey, chunkMap);
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: Added {} chunks with blocks to save data for dimension {}", (Object)chunkMap.size(), (Object)dimKey);
            }
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Total blocks to save: {}", (Object)totalBlocks);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Dimensions to save: {}", (Object)saveData.size());
            Gson gson = new GsonBuilder().setPrettyPrinting().create();
            String json = gson.toJson(saveData);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: JSON length: {}", (Object)json.length());
            if (json.length() < 20) {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: JSON too small ({} bytes) - skipping save to prevent corruption", (Object)json.length());
                return;
            }
            Files.write(saveFile, json.getBytes(), new OpenOption[0]);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Successfully saved index data to {}", (Object)saveFile);
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.error("BlockIndexManager: Failed to save index data: {}", (Object)e.getMessage());
            e.printStackTrace();
        }
    }

    public static boolean loadIndexData(MinecraftServer server) {
        try {
            Type saveDataType;
            Path saveFile = BlockIndexManager.getSaveFilePath(server);
            if (!Files.exists(saveFile, new LinkOption[0])) {
                ExplosionOverhaul.LOGGER.debug("BlockIndexManager: No save file found at {}", (Object)saveFile);
                return false;
            }
            Gson gson = new Gson();
            String json = new String(Files.readAllBytes(saveFile));
            Map saveData = (Map)gson.fromJson(json, saveDataType = new TypeToken<Map<String, Map<String, Set<Long>>>>(){}.getType());
            if (saveData == null || saveData.isEmpty()) {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: Save file is empty or corrupted");
                return false;
            }
            indexByDimension.clear();
            for (Map.Entry dimEntry : saveData.entrySet()) {
                try {
                    ResourceKey dimKey = ResourceKey.m_135785_((ResourceKey)Registries.f_256858_, (ResourceLocation)ResourceLocation.parse((String)((String)dimEntry.getKey())));
                    ConcurrentHashMap chunkMap = new ConcurrentHashMap();
                    for (Map.Entry chunkEntry : ((Map)dimEntry.getValue()).entrySet()) {
                        Long chunkKey = Long.parseLong((String)chunkEntry.getKey());
                        Set blockSet = Collections.newSetFromMap(new ConcurrentHashMap());
                        blockSet.addAll((Collection)chunkEntry.getValue());
                        chunkMap.put(chunkKey, blockSet);
                    }
                    indexByDimension.put((ResourceKey<Level>)dimKey, chunkMap);
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.warn("BlockIndexManager: Failed to load dimension {}: {}", dimEntry.getKey(), (Object)e.getMessage());
                }
            }
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Successfully loaded index data from {}", (Object)saveFile);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Loaded {} dimensions with indexed blocks", (Object)indexByDimension.size());
            scanningComplete = true;
            totalChunksToScan = 0;
            chunksScanned = 0;
            lampsFound = 0;
            dripstonesFound = 0;
            glassBlocksFound = 0;
            return true;
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.error("BlockIndexManager: Failed to load index data: {}", (Object)e.getMessage());
            e.printStackTrace();
            return false;
        }
    }

    public static boolean hasSaveFile(MinecraftServer server) {
        Path saveFile = BlockIndexManager.getSaveFilePath(server);
        return Files.exists(saveFile, new LinkOption[0]) && Files.isRegularFile(saveFile, new LinkOption[0]);
    }

    private static int getChunksToScanPerTick() {
        int cpuPercent = (Integer)Config.COMMON.scan.cpuUsagePercent.get();
        int baseChunks = 500;
        return Math.max(1, baseChunks * cpuPercent / 100);
    }

    private static boolean isChunkScanningDisabled() {
        return (Boolean)Config.COMMON.scan.enableBlockIndexing.get() == false;
    }

    private static boolean isScanning() {
        return !chunkScanQueue.isEmpty() && totalChunksToScan > 0 && !scanningComplete;
    }

    public static boolean isRescanMode() {
        return isRescanMode;
    }

    public static void register(ServerLevel level, BlockPos pos, BlockType type) {
        ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
        ChunkPos cp = new ChunkPos(pos);
        long ck = BlockIndexManager.chunkKey(cp);
        dimIndex.computeIfAbsent(ck, k -> Collections.newSetFromMap(new ConcurrentHashMap())).add(BlockIndexManager.packPos(pos));
    }

    public static void unregister(ServerLevel level, BlockPos pos, BlockType type) {
        ChunkPos cp;
        long ck;
        ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
        Set<Long> set = dimIndex.get(ck = BlockIndexManager.chunkKey(cp = new ChunkPos(pos)));
        if (set != null) {
            set.remove(BlockIndexManager.packPos(pos));
            if (set.isEmpty()) {
                dimIndex.remove(ck);
            }
        }
    }

    public static void scanChunk(ServerLevel level, ChunkPos cp) {
        long ck;
        ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
        if (dimIndex.containsKey(ck = BlockIndexManager.chunkKey(cp))) {
            return;
        }
        int baseX = cp.m_45604_();
        int baseZ = cp.m_45605_();
        Set set = Collections.newSetFromMap(new ConcurrentHashMap());
        int chunkLamps = 0;
        int chunkDripstones = 0;
        int chunkGlass = 0;
        for (int lx = 0; lx < 16; ++lx) {
            for (int lz = 0; lz < 16; ++lz) {
                for (int y = level.m_141937_(); y < level.m_151558_(); ++y) {
                    BlockPos pos = new BlockPos(baseX + lx, y, baseZ + lz);
                    if (!level.m_46749_(pos)) continue;
                    BlockState state = level.m_8055_(pos);
                    if (state.m_60713_(Blocks.f_50261_)) {
                        set.add(BlockIndexManager.packPos(pos));
                        ++chunkLamps;
                        continue;
                    }
                    if (state.m_60713_(Blocks.f_152588_)) {
                        set.add(BlockIndexManager.packPos(pos));
                        ++chunkDripstones;
                        continue;
                    }
                    if (!BlockIndexManager.isGlassBlock(state)) continue;
                    set.add(BlockIndexManager.packPos(pos));
                    ++chunkGlass;
                }
            }
        }
        lampsFound += chunkLamps;
        dripstonesFound += chunkDripstones;
        glassBlocksFound += chunkGlass;
        if (!set.isEmpty()) {
            dimIndex.put(ck, set);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Found {} blocks in chunk {} {}: {}", new Object[]{set.size(), cp.f_45578_, cp.f_45579_, set.size() > 10 ? set.size() + " blocks" : set});
        }
        if (++chunksScanned >= totalChunksToScan && totalChunksToScan > 0) {
            MinecraftServer server;
            scanningComplete = true;
            int totalBlocksFound = 0;
            for (Map.Entry<ResourceKey<Level>, ConcurrentHashMap<Long, Set<Long>>> dimEntry : indexByDimension.entrySet()) {
                for (Map.Entry<Long, Set<Long>> chunkEntry : dimEntry.getValue().entrySet()) {
                    totalBlocksFound += chunkEntry.getValue().size();
                }
            }
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: chunk scanning completed! Scanned {}/{} chunks", (Object)chunksScanned, (Object)totalChunksToScan);
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: Found {} total blocks across {} dimensions", (Object)totalBlocksFound, (Object)indexByDimension.size());
            try {
                server = ServerLifecycleHooks.getCurrentServer();
                if (server != null) {
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: Starting auto-save after scan completion...");
                    BlockIndexManager.saveIndexData(server);
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to auto-save scan data: {}", (Object)e.getMessage());
                e.printStackTrace();
            }
            try {
                server = ServerLifecycleHooks.getCurrentServer();
                if (server != null) {
                    server.execute(() -> BlockIndexManager.sendProgressUpdate());
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to enqueue final progress update: {}", (Object)e.getMessage());
            }
        }
        if (chunksScanned % 10 == 0 || scanningComplete) {
            BlockIndexManager.sendProgressUpdate();
        }
    }

    public static void removeChunk(ServerLevel level, ChunkPos cp) {
        ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
        long ck = BlockIndexManager.chunkKey(cp);
        dimIndex.remove(ck);
        Set<Long> pending = BlockIndexManager.getOrCreatePendingSet(level);
        pending.remove(ck);
    }

    public static List<BlockPos> getNearby(ServerLevel level, BlockPos center, int radius, BlockType type) {
        ArrayList<BlockPos> result = new ArrayList<BlockPos>();
        int minX = center.m_123341_() - radius;
        int maxX = center.m_123341_() + radius;
        int minZ = center.m_123343_() - radius;
        int maxZ = center.m_123343_() + radius;
        int minChunkX = minX >> 4;
        int maxChunkX = maxX >> 4;
        int minChunkZ = minZ >> 4;
        int maxChunkZ = maxZ >> 4;
        ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
        long r2 = (long)radius * (long)radius;
        for (int cx = minChunkX; cx <= maxChunkX; ++cx) {
            for (int cz = minChunkZ; cz <= maxChunkZ; ++cz) {
                long ck = BlockIndexManager.chunkKey(new ChunkPos(cx, cz));
                Set<Long> set = dimIndex.get(ck);
                if (set == null || set.isEmpty()) continue;
                for (long packed : set) {
                    long dz;
                    long dy;
                    BlockPos pos = BlockIndexManager.unpackPos(packed);
                    long dx = pos.m_123341_() - center.m_123341_();
                    if (dx * dx + (dy = (long)(pos.m_123342_() - center.m_123342_())) * dy + (dz = (long)(pos.m_123343_() - center.m_123343_())) * dz > r2) continue;
                    BlockState state = level.m_8055_(pos);
                    if (type == BlockType.LAMP && state.m_60713_(Blocks.f_50261_)) {
                        result.add(pos);
                    }
                    if (type == BlockType.DRIPSTONE && state.m_60713_(Blocks.f_152588_)) {
                        result.add(pos);
                    }
                    if (type != BlockType.GLASS || !BlockIndexManager.isGlassBlock(state)) continue;
                    result.add(pos);
                }
            }
        }
        return result;
    }

    @SubscribeEvent
    public static void onChunkLoad(ChunkEvent.Load event) {
        if (!ENABLED) {
            return;
        }
        if (BlockIndexManager.isChunkScanningDisabled()) {
            return;
        }
        LevelAccessor levelAccessor = event.getLevel();
        if (!(levelAccessor instanceof ServerLevel)) {
            return;
        }
        ServerLevel level = (ServerLevel)levelAccessor;
        if (userDeclinedScan) {
            return;
        }
        if (!isSingleplayer && !serverScanDecisionMade) {
            return;
        }
        if (INITIAL_SCAN_ENQUEUED) {
            return;
        }
        ResourceKey chunkDimension = level.m_46472_();
        if (lastScannedDimension != null && !lastScannedDimension.equals((Object)chunkDimension)) {
            return;
        }
        if (scanningComplete) {
            return;
        }
        long ck = BlockIndexManager.chunkKey(event.getChunk().m_7697_());
        Set<Long> pending = BlockIndexManager.getOrCreatePendingSet(level);
        if (pending.add(ck)) {
            chunkScanQueue.add(new ScanTask((ResourceKey<Level>)level.m_46472_(), event.getChunk().m_7697_()));
        }
    }

    @SubscribeEvent
    public static void onChunkUnload(ChunkEvent.Unload event) {
        if (!ENABLED) {
            return;
        }
        LevelAccessor levelAccessor = event.getLevel();
        if (!(levelAccessor instanceof ServerLevel)) {
            return;
        }
        ServerLevel level = (ServerLevel)levelAccessor;
        BlockIndexManager.removeChunk(level, event.getChunk().m_7697_());
        chunkScanQueue.removeIf(t -> t.dim().equals((Object)level.m_46472_()) && t.chunkPos().equals((Object)event.getChunk().m_7697_()));
    }

    @SubscribeEvent
    public static void onBlockPlaced(BlockEvent.EntityPlaceEvent event) {
        if (!ENABLED) {
            return;
        }
        LevelAccessor levelAccessor = event.getLevel();
        if (!(levelAccessor instanceof ServerLevel)) {
            return;
        }
        ServerLevel level = (ServerLevel)levelAccessor;
        BlockPos pos = event.getPos();
        BlockState state = level.m_8055_(pos);
        if (state.m_60713_(Blocks.f_50261_)) {
            BlockIndexManager.register(level, pos, BlockType.LAMP);
        } else if (state.m_60713_(Blocks.f_152588_)) {
            BlockIndexManager.register(level, pos, BlockType.DRIPSTONE);
        } else if (BlockIndexManager.isGlassBlock(state)) {
            BlockIndexManager.register(level, pos, BlockType.GLASS);
        }
    }

    @SubscribeEvent
    public static void onBlockBroken(BlockEvent.BreakEvent event) {
        if (!ENABLED) {
            return;
        }
        LevelAccessor levelAccessor = event.getLevel();
        if (!(levelAccessor instanceof ServerLevel)) {
            return;
        }
        ServerLevel level = (ServerLevel)levelAccessor;
        BlockPos pos = event.getPos();
        BlockIndexManager.unregister(level, pos, BlockType.LAMP);
        BlockIndexManager.unregister(level, pos, BlockType.DRIPSTONE);
        BlockIndexManager.unregister(level, pos, BlockType.GLASS);
    }

    public static boolean isPlayerAuthorized(ServerPlayer player) {
        if (player == null) {
            return false;
        }
        return player.hasPermissions(2) || isSingleplayer;
    }

    @SubscribeEvent
    public static void onPlayerJoinServer(PlayerEvent.PlayerLoggedInEvent event) {
        if (!ENABLED) {
            return;
        }
        if (BlockIndexManager.isChunkScanningDisabled()) {
            return;
        }
        Player player = event.getEntity();
        if (!(player instanceof ServerPlayer)) {
            return;
        }
        ServerPlayer player2 = (ServerPlayer)player;
        if (BlockIndexManager.isPlayerAuthorized(player2)) {
            ServerLevel level = player2.m_284548_();
            MinecraftServer server = level.m_7654_();
            boolean saveFileExists = BlockIndexManager.hasSaveFile(server);
            if (isSingleplayer) {
                if (!(waitingForUserInput || waitingForLoadDecision || scanningComplete)) {
                    chunkScanQueue.clear();
                    totalChunksToScan = 0;
                    chunksScanned = 0;
                }
                if (!(waitingForUserInput || waitingForLoadDecision || BlockIndexManager.isScanning() || scanningComplete || userDeclinedScan)) {
                    pendingScanLevel = level;
                    if (saveFileExists) {
                        waitingForLoadDecision = true;
                        hasSaveFile = true;
                        try {
                            ScanLoadPromptPacket packet = new ScanLoadPromptPacket(true);
                            PacketHandler.sendToPlayer(player2, packet);
                            ExplosionOverhaul.LOGGER.info("BlockIndexManager: showing load prompt for existing save file in world: {}", (Object)level.m_46472_().m_135782_());
                        }
                        catch (Exception e) {
                            ExplosionOverhaul.LOGGER.warn("Failed to send load prompt: {}", (Object)e.getMessage());
                        }
                    } else {
                        waitingForUserInput = true;
                        hasSaveFile = false;
                        BlockIndexManager.sendScanPromptPacket(true);
                        ExplosionOverhaul.LOGGER.info("BlockIndexManager: waiting for user input to start scan in world: {}", (Object)level.m_46472_().m_135782_());
                    }
                } else if (BlockIndexManager.isScanning() || !chunkScanQueue.isEmpty() && totalChunksToScan > 0) {
                    try {
                        ScanProgressPacket packet = new ScanProgressPacket(totalChunksToScan, chunksScanned, scanningComplete, lampsFound, dripstonesFound, glassBlocksFound);
                        PacketHandler.sendToPlayer(player2, packet);
                        ExplosionOverhaul.LOGGER.debug("Sent scan progress to rejoining OP player: {}/{} chunks", (Object)chunksScanned, (Object)totalChunksToScan);
                    }
                    catch (Exception e) {
                        ExplosionOverhaul.LOGGER.warn("Failed to send scan progress to rejoining OP player: {}", (Object)e.getMessage());
                    }
                }
            } else if (!serverScanDecisionMade && !userDeclinedScan) {
                if (!serverScanPromptShown) {
                    serverScanPromptShown = true;
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: first OP joined server, waiting for scan decision from: {}", (Object)player2.m_7755_().getString());
                } else {
                    ExplosionOverhaul.LOGGER.info("BlockIndexManager: additional OP joined server, showing pending decision to: {}", (Object)player2.m_7755_().getString());
                }
                pendingScanLevel = level;
                if (saveFileExists) {
                    waitingForLoadDecision = true;
                    hasSaveFile = true;
                    try {
                        ScanLoadPromptPacket packet = new ScanLoadPromptPacket(true);
                        PacketHandler.sendToPlayer(player2, packet);
                        ExplosionOverhaul.LOGGER.info("BlockIndexManager: showing load prompt for existing save file to OP: {}", (Object)player2.m_7755_().getString());
                    }
                    catch (Exception e) {
                        ExplosionOverhaul.LOGGER.warn("Failed to send load prompt: {}", (Object)e.getMessage());
                    }
                } else {
                    waitingForUserInput = true;
                    hasSaveFile = false;
                    try {
                        ScanPromptPacket packet = new ScanPromptPacket(true);
                        PacketHandler.sendToPlayer(player2, packet);
                        ExplosionOverhaul.LOGGER.info("BlockIndexManager: showing scan prompt to OP: {}", (Object)player2.m_7755_().getString());
                    }
                    catch (Exception e) {
                        ExplosionOverhaul.LOGGER.warn("Failed to send scan prompt: {}", (Object)e.getMessage());
                    }
                }
            } else if (totalChunksToScan > 0 && !scanningComplete) {
                try {
                    ScanProgressPacket packet = new ScanProgressPacket(totalChunksToScan, chunksScanned, scanningComplete, lampsFound, dripstonesFound, glassBlocksFound);
                    PacketHandler.sendToPlayer(player2, packet);
                    ExplosionOverhaul.LOGGER.debug("Sent scan progress to joining OP player: {}/{} chunks", (Object)chunksScanned, (Object)totalChunksToScan);
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.warn("Failed to send scan progress to joining OP player: {}", (Object)e.getMessage());
                }
            }
        }
    }

    @SubscribeEvent
    public static void onServerTick(TickEvent.ServerTickEvent event) {
        ScanTask task;
        if (event.phase != TickEvent.Phase.END) {
            return;
        }
        if (BlockIndexManager.isChunkScanningDisabled()) {
            return;
        }
        if (userDeclinedScan) {
            return;
        }
        if (!isSingleplayer && !serverScanDecisionMade) {
            return;
        }
        int chunksToScan = BlockIndexManager.getChunksToScanPerTick();
        for (int processed = 0; processed < chunksToScan && (task = chunkScanQueue.poll()) != null; ++processed) {
            MinecraftServer server = event.getServer();
            ServerLevel level = server.m_129880_(task.dim());
            if (level == null) continue;
            try {
                BlockIndexManager.scanChunk(level, task.chunkPos());
                long ck = BlockIndexManager.chunkKey(task.chunkPos());
                Set<Long> pending = BlockIndexManager.getOrCreatePendingSet(level);
                pending.remove(ck);
                continue;
            }
            catch (Exception ex) {
                ExplosionOverhaul.LOGGER.warn("BlockIndexManager: error scanning chunk {} {}: {}", new Object[]{task.chunkPos().f_45578_, task.chunkPos().f_45579_, ex.toString()});
            }
        }
    }

    @SubscribeEvent
    public static void onServerStarted(ServerStartedEvent event) {
        currentServer = event.getServer();
        abortCurrentScan = false;
        if (!ENABLED) {
            return;
        }
        if (BlockIndexManager.isChunkScanningDisabled()) {
            return;
        }
        if (INITIAL_SCAN_ENQUEUED) {
            return;
        }
        MinecraftServer server = event.getServer();
        isSingleplayer = server.m_129792_();
        if (!isSingleplayer) {
            userDeclinedScan = false;
        }
        serverScanPromptShown = false;
        serverScanDecisionMade = false;
        if (isSingleplayer) {
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: singleplayer detected, will scan on world entry");
            INITIAL_SCAN_ENQUEUED = true;
            return;
        }
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: multiplayer server detected, will wait for user decision before scanning");
        INITIAL_SCAN_ENQUEUED = true;
    }

    private static void scanExistingChunksOnServer(MinecraftServer server) {
        try {
            int totalChunks;
            chunksScanned = 0;
            scanningComplete = false;
            lampsFound = 0;
            dripstonesFound = 0;
            glassBlocksFound = 0;
            chunkScanQueue.clear();
            pendingChunkKeys.clear();
            HyperScanner scanner = new HyperScanner(server);
            totalChunksToScan = totalChunks = scanner.prepareTasks();
            INITIAL_SCAN_ENQUEUED = true;
            BlockIndexManager.sendProgressUpdate();
            CompletableFuture.runAsync(() -> {
                try {
                    scanner.run();
                    chunksScanned = scanner.getProcessedChunks();
                    lampsFound = scanner.getLampsFound();
                    dripstonesFound = scanner.getDripstonesFound();
                    glassBlocksFound = scanner.getGlassFound();
                    scanningComplete = true;
                    server.execute(() -> {
                        BlockIndexManager.sendProgressUpdate();
                        BlockIndexManager.saveIndexDataAfterScan(server);
                        ExplosionOverhaul.LOGGER.info("HyperScanner: background scan complete. Found {} lamps, {} dripstones, {} glass.", new Object[]{lampsFound, dripstonesFound, glassBlocksFound});
                    });
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.error("HyperScanner: background scan failed", (Throwable)e);
                }
            });
        }
        catch (Exception ex) {
            ExplosionOverhaul.LOGGER.warn("BlockIndexManager: failed to start scan: {}", (Object)ex.toString());
        }
    }

    @SubscribeEvent
    public static void onServerStopped(ServerStoppedEvent event) {
        if (!ENABLED) {
            return;
        }
        abortCurrentScan = true;
        if (!indexByDimension.isEmpty() && scanningComplete) {
            try {
                BlockIndexManager.saveIndexData(event.getServer());
                ExplosionOverhaul.LOGGER.info("BlockIndexManager: saved data before server shutdown");
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("Failed to save data on server stop: {}", (Object)e.getMessage());
            }
        }
        userDeclinedScan = false;
        serverScanPromptShown = false;
        serverScanDecisionMade = false;
        waitingForUserInput = false;
        waitingForLoadDecision = false;
        pendingScanLevel = null;
        isRescanMode = false;
        rescanRequestingPlayer = null;
        hasSaveFile = false;
        currentWorldId = null;
        INITIAL_SCAN_ENQUEUED = false;
        try {
            ScanProgressPacket packet = new ScanProgressPacket(0, 0, true, 0, 0, 0);
            PacketHandler.sendToAll(packet);
        }
        catch (Exception exception) {
            // empty catch block
        }
        currentServer = null;
        scanningComplete = false;
        totalChunksToScan = 0;
        chunksScanned = 0;
        ExplosionOverhaul.LOGGER.info("BlockIndexManager: reset scan state and aborted background tasks on server stop");
    }

    @SubscribeEvent
    public static void onPlayerLogout(PlayerEvent.PlayerLoggedOutEvent event) {
        Player player;
        if (!ENABLED) {
            return;
        }
        if (isSingleplayer) {
            abortCurrentScan = true;
            waitingForUserInput = false;
            waitingForLoadDecision = false;
            pendingScanLevel = null;
            userDeclinedScan = false;
            hasSaveFile = false;
            scanningComplete = false;
            totalChunksToScan = 0;
            chunksScanned = 0;
            BlockIndexManager.clearAndSaveData();
            ExplosionOverhaul.LOGGER.info("BlockIndexManager: saved and cleared scan data on singleplayer logout");
        }
        if ((player = event.getEntity()) instanceof ServerPlayer) {
            ServerPlayer player2 = (ServerPlayer)player;
            try {
                ScanProgressPacket packet = new ScanProgressPacket(0, 0, true, 0, 0, 0);
                PacketHandler.sendToPlayer(player2, packet);
            }
            catch (Exception exception) {
                // empty catch block
            }
        }
    }

    private static Path resolveRegionPath(ServerLevel lvl) {
        try {
            Path worldPath = lvl.m_7654_().m_129843_(LevelResource.f_78182_);
            String dimPath = lvl.m_46472_().m_135782_().m_135815_();
            if ("overworld".equals(dimPath)) {
                return worldPath.resolve("region");
            }
            if ("the_nether".equals(dimPath)) {
                return worldPath.resolve("DIM-1").resolve("region");
            }
            if ("the_end".equals(dimPath)) {
                return worldPath.resolve("DIM1").resolve("region");
            }
            return worldPath.resolve("dimensions").resolve(lvl.m_46472_().m_135782_().m_135827_()).resolve(lvl.m_46472_().m_135782_().m_135815_()).resolve("region");
        }
        catch (Exception e) {
            ExplosionOverhaul.LOGGER.warn("HyperScanner: failed to resolve region path: {}", (Object)e.getMessage());
            return null;
        }
    }

    private static /* synthetic */ ServerPlayer lambda$loadExistingData$11(ServerPlayer serverPlayer) {
        return serverPlayer;
    }

    static {
        indexByDimension = new ConcurrentHashMap<ResourceKey<Level>, ConcurrentHashMap<Long, Set<Long>>>();
        chunkScanQueue = new ConcurrentLinkedQueue();
        pendingChunkKeys = new ConcurrentHashMap<ResourceKey<Level>, Set<Long>>();
        ENABLED = true;
        INITIAL_SCAN_ENQUEUED = false;
        totalChunksToScan = 0;
        chunksScanned = 0;
        scanningComplete = false;
        abortCurrentScan = false;
        lampsFound = 0;
        dripstonesFound = 0;
        glassBlocksFound = 0;
        lastScannedDimension = null;
        waitingForUserInput = false;
        pendingScanLevel = null;
        currentScannedWorld = null;
        isSingleplayer = false;
        serverScanPromptShown = false;
        serverScanDecisionMade = false;
        isRescanMode = false;
        rescanRequestingPlayer = null;
        userDeclinedScan = false;
        waitingForLoadDecision = false;
        hasSaveFile = false;
        currentWorldId = null;
        DEFAULT_REINFORCED_GLASS_BLACKLIST = List.of("securitycraft:reinforced_white_stained_glass", "securitycraft:reinforced_orange_stained_glass", "securitycraft:reinforced_magenta_stained_glass", "securitycraft:reinforced_light_blue_stained_glass", "securitycraft:reinforced_yellow_stained_glass", "securitycraft:reinforced_lime_stained_glass", "securitycraft:reinforced_pink_stained_glass", "securitycraft:reinforced_gray_stained_glass", "securitycraft:reinforced_light_gray_stained_glass", "securitycraft:reinforced_cyan_stained_glass", "securitycraft:reinforced_purple_stained_glass", "securitycraft:reinforced_blue_stained_glass", "securitycraft:reinforced_brown_stained_glass", "securitycraft:reinforced_green_stained_glass", "securitycraft:reinforced_red_stained_glass", "securitycraft:reinforced_black_stained_glass", "securitycraft:reinforced_white_stained_glass_pane", "securitycraft:reinforced_orange_stained_glass_pane", "securitycraft:reinforced_magenta_stained_glass_pane", "securitycraft:reinforced_light_blue_stained_glass_pane", "securitycraft:reinforced_yellow_stained_glass_pane", "securitycraft:reinforced_lime_stained_glass_pane", "securitycraft:reinforced_pink_stained_glass_pane", "securitycraft:reinforced_gray_stained_glass_pane", "securitycraft:reinforced_light_gray_stained_glass_pane", "securitycraft:reinforced_cyan_stained_glass_pane", "securitycraft:reinforced_purple_stained_glass_pane", "securitycraft:reinforced_blue_stained_glass_pane", "securitycraft:reinforced_brown_stained_glass_pane", "securitycraft:reinforced_green_stained_glass_pane", "securitycraft:reinforced_red_stained_glass_pane", "securitycraft:reinforced_black_stained_glass_pane", "securitycraft:reinforced_glass", "securitycraft:reinforced_glass_pane", "create_tank_defenses:titanium_morning_reinforced_blast_glass", "mofus_better_end_:reinforced_glass", "crusty_chunks:reinforced_glass", "createnuclear:reinforced_glass", "mekanismgenerators:reactor_glass", "mekanism:structural_glass");
        MOD_CONFIG_DIRECTORY = Paths.get("config", "explosionoverhaul");
        GLASS_BLACKLIST_FILE = MOD_CONFIG_DIRECTORY.resolve("GlassBlacklist.json");
        GLASS_BLACKLIST = new CopyOnWriteArrayList<String>(DEFAULT_REINFORCED_GLASS_BLACKLIST);
        GLASS_BLACKLIST_LOOKUP = new AtomicReference<HashSet<String>>(new HashSet<String>(DEFAULT_REINFORCED_GLASS_BLACKLIST));
        BlockIndexManager.loadGlassBlacklistFromJson();
    }

    private record ScanTask(ResourceKey<Level> dim, ChunkPos chunkPos) {
    }

    public static enum BlockType {
        LAMP,
        DRIPSTONE,
        GLASS;

    }

    private static class HyperScanner {
        private static final int SECTOR_BYTES = 4096;
        private final MinecraftServer server;
        private final ConcurrentLinkedQueue<RegionTask> tasks = new ConcurrentLinkedQueue();
        private final AtomicInteger processedChunks = new AtomicInteger();
        private final LongAdder lamps = new LongAdder();
        private final LongAdder drips = new LongAdder();
        private final LongAdder glass = new LongAdder();
        private final int workerCount;

        HyperScanner(MinecraftServer server) {
            this.server = server;
            this.workerCount = this.resolveWorkerCount();
        }

        int prepareTasks() {
            int total = 0;
            for (ServerLevel level : this.server.m_129785_()) {
                Path regionPath = BlockIndexManager.resolveRegionPath(level);
                if (regionPath == null || !Files.exists(regionPath, new LinkOption[0])) {
                    ExplosionOverhaul.LOGGER.info("HyperScanner: region path not found for {}", (Object)level.m_46472_().m_135782_());
                    continue;
                }
                try {
                    Stream<Path> regionFiles = Files.list(regionPath);
                    try {
                        for (Path regionFile : regionFiles.filter(p -> p.toString().endsWith(".mca")).toList()) {
                            RegionInfo info = this.parseRegion(regionFile);
                            if (info == null || info.chunkCount <= 0) continue;
                            this.tasks.add(new RegionTask(level, regionFile, info.regionX, info.regionZ));
                            total += info.chunkCount;
                        }
                    }
                    finally {
                        if (regionFiles == null) continue;
                        regionFiles.close();
                    }
                }
                catch (Exception e) {
                    ExplosionOverhaul.LOGGER.warn("HyperScanner: failed to enumerate region files in {}: {}", (Object)regionPath, (Object)e.getMessage());
                }
            }
            ExplosionOverhaul.LOGGER.info("HyperScanner: prepared {} region tasks, total chunks {}", (Object)this.tasks.size(), (Object)total);
            return total;
        }

        void run() {
            if (this.tasks.isEmpty()) {
                ExplosionOverhaul.LOGGER.info("HyperScanner: no tasks to run");
                return;
            }
            ExecutorService pool = Executors.newFixedThreadPool(this.workerCount, r -> {
                Thread t = new Thread(r, "EO-HyperScanner");
                t.setDaemon(true);
                return t;
            });
            for (int i = 0; i < this.workerCount; ++i) {
                pool.execute(this::workerLoop);
            }
            pool.shutdown();
            try {
                while (!pool.isTerminated()) {
                    pool.awaitTermination(1L, TimeUnit.SECONDS);
                }
            }
            catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
            }
        }

        int getProcessedChunks() {
            return this.processedChunks.get();
        }

        int getLampsFound() {
            return this.lamps.intValue();
        }

        int getDripstonesFound() {
            return this.drips.intValue();
        }

        int getGlassFound() {
            return this.glass.intValue();
        }

        private void workerLoop() {
            RegionTask task;
            while (!abortCurrentScan && (task = this.tasks.poll()) != null) {
                this.scanRegion(task);
            }
        }

        private void scanRegion(RegionTask task) {
            try (RandomAccessFile raf = new RandomAccessFile(task.file().toFile(), "r");){
                byte[] header = new byte[4096];
                int read = raf.read(header);
                if (read < 4096) {
                    return;
                }
                for (int i = 0; i < 1024; ++i) {
                    if (abortCurrentScan) {
                        return;
                    }
                    int offsetIndex = i * 4;
                    int chunkOffset = (header[offsetIndex] & 0xFF) << 16 | (header[offsetIndex + 1] & 0xFF) << 8 | header[offsetIndex + 2] & 0xFF;
                    int sectorCount = header[offsetIndex + 3] & 0xFF;
                    if (chunkOffset == 0 || sectorCount == 0) continue;
                    int localX = i % 32;
                    int localZ = i / 32;
                    int chunkX = task.regionX() * 32 + localX;
                    int chunkZ = task.regionZ() * 32 + localZ;
                    try {
                        this.processChunk(raf, chunkOffset, sectorCount, new ChunkPos(chunkX, chunkZ), task.level());
                        continue;
                    }
                    catch (Exception e) {
                        ExplosionOverhaul.LOGGER.warn("HyperScanner: failed to process chunk {} {} in {}: {}", new Object[]{chunkX, chunkZ, task.file().getFileName(), e.getMessage()});
                    }
                }
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("HyperScanner: failed to scan region {}: {}", (Object)task.file().getFileName(), (Object)e.getMessage());
            }
        }

        private void processChunk(RandomAccessFile raf, int chunkOffsetSectors, int sectorCount, ChunkPos chunkPos, ServerLevel level) throws IOException {
            InflaterInputStream in;
            long filePos = (long)chunkOffsetSectors * 4096L;
            raf.seek(filePos);
            int length = raf.readInt();
            if (length <= 0 || length > sectorCount * 4096) {
                return;
            }
            int compressionType = raf.readUnsignedByte();
            byte[] data = new byte[length - 1];
            raf.readFully(data);
            ByteArrayInputStream base = new ByteArrayInputStream(data);
            if (compressionType == 2) {
                in = new InflaterInputStream(base);
            } else if (compressionType == 1) {
                in = new GZIPInputStream(base);
            } else {
                return;
            }
            CompoundTag root = NbtIo.m_128928_((DataInput)new DataInputStream(in));
            if (root == null) {
                return;
            }
            CompoundTag levelTag = root.m_128425_("Level", 10) ? root.m_128469_("Level") : (root.m_128425_("level", 10) ? root.m_128469_("level") : root);
            ListTag sections = levelTag.m_128437_("sections", 10);
            HashSet<Long> found = new HashSet<Long>();
            for (int i = 0; i < sections.size(); ++i) {
                CompoundTag section = sections.m_128728_(i);
                this.processSection(section, chunkPos, level, found);
            }
            if (!found.isEmpty()) {
                ConcurrentHashMap<Long, Set<Long>> dimIndex = BlockIndexManager.getOrCreateDimIndex(level);
                dimIndex.put(BlockIndexManager.chunkKey(chunkPos), found);
            }
            if (abortCurrentScan) {
                return;
            }
            int processed = this.processedChunks.incrementAndGet();
            this.maybeSendProgress(processed);
        }

        private void processSection(CompoundTag section, ChunkPos chunkPos, ServerLevel level, Set<Long> out) {
            if (!section.m_128425_("block_states", 10)) {
                return;
            }
            CompoundTag blockStatesTag = section.m_128469_("block_states");
            if (blockStatesTag.m_128425_("palette", 9)) {
                ListTag palette = blockStatesTag.m_128437_("palette", 10);
                boolean hasInterestingBlock = false;
                for (int i = 0; i < palette.size(); ++i) {
                    String name = palette.m_128728_(i).m_128461_("Name");
                    if (!name.equals("minecraft:redstone_lamp") && !name.equals("minecraft:pointed_dripstone") && (!name.contains("glass") || BlockIndexManager.isGlassProtected(name))) continue;
                    hasInterestingBlock = true;
                    break;
                }
                if (!hasInterestingBlock) {
                    return;
                }
            }
            try {
                DataResult result = PalettedContainer.m_238371_((IdMap)Block.f_49791_, (Codec)BlockState.f_61039_, (PalettedContainer.Strategy)PalettedContainer.Strategy.f_188137_, (Object)Blocks.f_50016_.m_49966_()).parse((DynamicOps)NbtOps.f_128958_, (Object)blockStatesTag);
                result.resultOrPartial(err -> {}).ifPresent(container -> {
                    byte sectionY = section.m_128445_("Y");
                    int baseY = sectionY * 16;
                    if (baseY < level.m_141937_() || baseY >= level.m_151558_()) {
                        return;
                    }
                    IdentityHashMap<BlockState, Byte> stateTypeCache = new IdentityHashMap<BlockState, Byte>();
                    for (int y = 0; y < 16; ++y) {
                        int worldY = baseY + y;
                        if (worldY < level.m_141937_() || worldY >= level.m_151558_()) continue;
                        for (int z = 0; z < 16; ++z) {
                            for (int x = 0; x < 16; ++x) {
                                BlockState state = (BlockState)container.m_63087_(x, y, z);
                                Byte type = (Byte)stateTypeCache.get(state);
                                if (type == null) {
                                    type = state.m_60713_(Blocks.f_50261_) ? Byte.valueOf((byte)1) : (state.m_60713_(Blocks.f_152588_) ? Byte.valueOf((byte)2) : (BlockIndexManager.isGlassBlock(state) ? Byte.valueOf((byte)3) : Byte.valueOf((byte)0)));
                                    stateTypeCache.put(state, type);
                                }
                                if (type == 0) continue;
                                int worldX = chunkPos.m_45604_() + x;
                                int worldZ = chunkPos.m_45605_() + z;
                                out.add(BlockPos.m_121882_((int)worldX, (int)worldY, (int)worldZ));
                                if (type == 1) {
                                    this.lamps.increment();
                                    continue;
                                }
                                if (type == 2) {
                                    this.drips.increment();
                                    continue;
                                }
                                if (type != 3) continue;
                                this.glass.increment();
                            }
                        }
                    }
                });
            }
            catch (Exception exception) {
                // empty catch block
            }
        }

        private void maybeSendProgress(int processed) {
            if (processed % 50 == 0 || processed == totalChunksToScan) {
                int l = this.lamps.intValue();
                int d = this.drips.intValue();
                int g = this.glass.intValue();
                this.server.execute(() -> BlockIndexManager.sendMultiThreadProgressUpdate(processed, l, d, g));
            }
        }

        private RegionInfo parseRegion(Path regionFile) {
            int regionZ;
            int regionX;
            String fileName = regionFile.getFileName().toString();
            if (!fileName.startsWith("r.") || !fileName.endsWith(".mca")) {
                return null;
            }
            String[] parts = fileName.substring(2, fileName.length() - 4).split("\\.");
            if (parts.length != 2) {
                return null;
            }
            try {
                regionX = Integer.parseInt(parts[0]);
                regionZ = Integer.parseInt(parts[1]);
            }
            catch (NumberFormatException nfe) {
                return null;
            }
            int chunkCount = this.countChunksInRegion(regionFile);
            return new RegionInfo(regionX, regionZ, chunkCount);
        }

        /*
         * Enabled aggressive block sorting
         * Enabled unnecessary exception pruning
         * Enabled aggressive exception aggregation
         */
        private int countChunksInRegion(Path regionFile) {
            int count = 0;
            try (RandomAccessFile raf = new RandomAccessFile(regionFile.toFile(), "r");){
                byte[] header = new byte[4096];
                int read = raf.read(header);
                if (read < 4096) {
                    int n = 0;
                    return n;
                }
                int i = 0;
                while (i < 1024) {
                    int offset = i * 4;
                    int chunkOffset = (header[offset] & 0xFF) << 16 | (header[offset + 1] & 0xFF) << 8 | header[offset + 2] & 0xFF;
                    int sectorCount = header[offset + 3] & 0xFF;
                    if (chunkOffset > 0 && sectorCount > 0) {
                        ++count;
                    }
                    ++i;
                }
                return count;
            }
            catch (Exception e) {
                ExplosionOverhaul.LOGGER.warn("HyperScanner: failed to read region header {}: {}", (Object)regionFile.getFileName(), (Object)e.getMessage());
            }
            return count;
        }

        private int resolveWorkerCount() {
            int configured = (Integer)Config.COMMON.scan.maxScanThreads.get();
            int cores = Runtime.getRuntime().availableProcessors();
            if (configured <= 0) {
                return Math.max(1, cores);
            }
            return Math.max(1, Math.min(configured, cores));
        }
    }

    private record RegionInfo(int regionX, int regionZ, int chunkCount) {
    }

    private record RegionTask(ServerLevel level, Path file, int regionX, int regionZ) {
    }
}