package net.minecraft.world.gen;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import net.minecraft.crash.CrashReport;
import net.minecraft.crash.CrashReportCategory;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.util.BlockPos;
import net.minecraft.util.IProgressUpdate;
import net.minecraft.util.LongHashMap;
import net.minecraft.util.ReportedException;
import net.minecraft.world.ChunkCoordIntPair;
import net.minecraft.world.MinecraftException;
import net.minecraft.world.World;
import net.minecraft.world.WorldServer;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.chunk.EmptyChunk;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.chunk.storage.IChunkLoader;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class ChunkProviderServer implements IChunkProvider
{
private static final Logger logger = LogManager.getLogger();
private Set droppedChunksSet = Collections.newSetFromMap(new ConcurrentHashMap());
/** a dummy chunk, returned in place of an actual chunk. */
private Chunk dummyChunk;
/**
* chunk generator object. Calls to load nonexistent chunks are forwarded to this object.
*/
private IChunkProvider serverChunkGenerator;
private IChunkLoader chunkLoader;
/**
* if set, this flag forces a request to load a chunk to load the chunk rather than defaulting to the dummy if
* possible
*/
public boolean chunkLoadOverride = true;
/** map of chunk Id's to Chunk instances */
private LongHashMap id2ChunkMap = new LongHashMap();
private List loadedChunks = Lists.newArrayList();
private WorldServer worldObj;
private static final String __OBFID = "CL_00001436";
public ChunkProviderServer(WorldServer p_i1520_1_, IChunkLoader p_i1520_2_, IChunkProvider p_i1520_3_)
{
this.dummyChunk = new EmptyChunk(p_i1520_1_, 0, 0);
this.worldObj = p_i1520_1_;
this.chunkLoader = p_i1520_2_;
this.serverChunkGenerator = p_i1520_3_;
}
/**
* Checks to see if a chunk exists at x, y
*/
public boolean chunkExists(int p_73149_1_, int p_73149_2_)
{
return this.id2ChunkMap.containsItem(ChunkCoordIntPair.chunkXZ2Int(p_73149_1_, p_73149_2_));
}
public List func_152380_a()
{
return this.loadedChunks;
}
public void dropChunk(int p_73241_1_, int p_73241_2_)
{
if (this.worldObj.provider.canRespawnHere())
{
if (!this.worldObj.chunkExists(p_73241_1_, p_73241_2_))
{
this.droppedChunksSet.add(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(p_73241_1_, p_73241_2_)));
}
}
else
{
this.droppedChunksSet.add(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(p_73241_1_, p_73241_2_)));
}
}
/**
* marks all chunks for unload, ignoring those near the spawn
*/
public void unloadAllChunks()
{
Iterator var1 = this.loadedChunks.iterator();
while (var1.hasNext())
{
Chunk var2 = (Chunk)var1.next();
this.dropChunk(var2.xPosition, var2.zPosition);
}
}
/**
* loads or generates the chunk at the chunk location specified
*/
public Chunk loadChunk(int p_73158_1_, int p_73158_2_)
{
long var3 = ChunkCoordIntPair.chunkXZ2Int(p_73158_1_, p_73158_2_);
this.droppedChunksSet.remove(Long.valueOf(var3));
Chunk var5 = (Chunk)this.id2ChunkMap.getValueByKey(var3);
if (var5 == null)
{
var5 = this.loadChunkFromFile(p_73158_1_, p_73158_2_);
if (var5 == null)
{
if (this.serverChunkGenerator == null)
{
var5 = this.dummyChunk;
}
else
{
try
{
var5 = this.serverChunkGenerator.provideChunk(p_73158_1_, p_73158_2_);
}
catch (Throwable var9)
{
CrashReport var7 = CrashReport.makeCrashReport(var9, "Exception generating new chunk");
CrashReportCategory var8 = var7.makeCategory("Chunk to be generated");
var8.addCrashSection("Location", String.format("%d,%d", new Object[] {Integer.valueOf(p_73158_1_), Integer.valueOf(p_73158_2_)}));
var8.addCrashSection("Position hash", Long.valueOf(var3));
var8.addCrashSection("Generator", this.serverChunkGenerator.makeString());
throw new ReportedException(var7);
}
}
}
this.id2ChunkMap.add(var3, var5);
this.loadedChunks.add(var5);
var5.onChunkLoad();
var5.populateChunk(this, this, p_73158_1_, p_73158_2_);
}
return var5;
}
/**
* Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
* specified chunk from the map seed and chunk seed
*/
public Chunk provideChunk(int p_73154_1_, int p_73154_2_)
{
Chunk var3 = (Chunk)this.id2ChunkMap.getValueByKey(ChunkCoordIntPair.chunkXZ2Int(p_73154_1_, p_73154_2_));
return var3 == null ? (!this.worldObj.isFindingSpawnPoint() && !this.chunkLoadOverride ? this.dummyChunk : this.loadChunk(p_73154_1_, p_73154_2_)) : var3;
}
private Chunk loadChunkFromFile(int p_73239_1_, int p_73239_2_)
{
if (this.chunkLoader == null)
{
return null;
}
else
{
try
{
Chunk var3 = this.chunkLoader.loadChunk(this.worldObj, p_73239_1_, p_73239_2_);
if (var3 != null)
{
var3.setLastSaveTime(this.worldObj.getTotalWorldTime());
if (this.serverChunkGenerator != null)
{
this.serverChunkGenerator.func_180514_a(var3, p_73239_1_, p_73239_2_);
}
}
return var3;
}
catch (Exception var4)
{
logger.error("Couldn\'t load chunk", var4);
return null;
}
}
}
private void saveChunkExtraData(Chunk p_73243_1_)
{
if (this.chunkLoader != null)
{
try
{
this.chunkLoader.saveExtraChunkData(this.worldObj, p_73243_1_);
}
catch (Exception var3)
{
logger.error("Couldn\'t save entities", var3);
}
}
}
private void saveChunkData(Chunk p_73242_1_)
{
if (this.chunkLoader != null)
{
try
{
p_73242_1_.setLastSaveTime(this.worldObj.getTotalWorldTime());
this.chunkLoader.saveChunk(this.worldObj, p_73242_1_);
}
catch (IOException var3)
{
logger.error("Couldn\'t save chunk", var3);
}
catch (MinecraftException var4)
{
logger.error("Couldn\'t save chunk; already in use by another instance of Minecraft?", var4);
}
}
}
/**
* Populates chunk with ores etc etc
*/
public void populate(IChunkProvider p_73153_1_, int p_73153_2_, int p_73153_3_)
{
Chunk var4 = this.provideChunk(p_73153_2_, p_73153_3_);
if (!var4.isTerrainPopulated())
{
var4.func_150809_p();
if (this.serverChunkGenerator != null)
{
this.serverChunkGenerator.populate(p_73153_1_, p_73153_2_, p_73153_3_);
var4.setChunkModified();
}
}
}
public boolean func_177460_a(IChunkProvider p_177460_1_, Chunk p_177460_2_, int p_177460_3_, int p_177460_4_)
{
if (this.serverChunkGenerator != null && this.serverChunkGenerator.func_177460_a(p_177460_1_, p_177460_2_, p_177460_3_, p_177460_4_))
{
Chunk var5 = this.provideChunk(p_177460_3_, p_177460_4_);
var5.setChunkModified();
return true;
}
else
{
return false;
}
}
/**
* Two modes of operation: if passed true, save all Chunks in one go. If passed false, save up to two chunks.
* Return true if all chunks have been saved.
*/
public boolean saveChunks(boolean p_73151_1_, IProgressUpdate p_73151_2_)
{
int var3 = 0;
for (int var4 = 0; var4 < this.loadedChunks.size(); ++var4)
{
Chunk var5 = (Chunk)this.loadedChunks.get(var4);
if (p_73151_1_)
{
this.saveChunkExtraData(var5);
}
if (var5.needsSaving(p_73151_1_))
{
this.saveChunkData(var5);
var5.setModified(false);
++var3;
if (var3 == 24 && !p_73151_1_)
{
return false;
}
}
}
return true;
}
/**
* Save extra data not associated with any Chunk. Not saved during autosave, only during world unload. Currently
* unimplemented.
*/
public void saveExtraData()
{
if (this.chunkLoader != null)
{
this.chunkLoader.saveExtraData();
}
}
/**
* Unloads chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
*/
public boolean unloadQueuedChunks()
{
if (!this.worldObj.disableLevelSaving)
{
for (int var1 = 0; var1 < 100; ++var1)
{
if (!this.droppedChunksSet.isEmpty())
{
Long var2 = (Long)this.droppedChunksSet.iterator().next();
Chunk var3 = (Chunk)this.id2ChunkMap.getValueByKey(var2.longValue());
if (var3 != null)
{
var3.onChunkUnload();
this.saveChunkData(var3);
this.saveChunkExtraData(var3);
this.id2ChunkMap.remove(var2.longValue());
this.loadedChunks.remove(var3);
}
this.droppedChunksSet.remove(var2);
}
}
if (this.chunkLoader != null)
{
this.chunkLoader.chunkTick();
}
}
return this.serverChunkGenerator.unloadQueuedChunks();
}
/**
* Returns if the IChunkProvider supports saving.
*/
public boolean canSave()
{
return !this.worldObj.disableLevelSaving;
}
/**
* Converts the instance data to a readable string.
*/
public String makeString()
{
return "ServerChunkCache: " + this.id2ChunkMap.getNumHashElements() + " Drop: " + this.droppedChunksSet.size();
}
public List func_177458_a(EnumCreatureType p_177458_1_, BlockPos p_177458_2_)
{
return this.serverChunkGenerator.func_177458_a(p_177458_1_, p_177458_2_);
}
public BlockPos func_180513_a(World worldIn, String p_180513_2_, BlockPos p_180513_3_)
{
return this.serverChunkGenerator.func_180513_a(worldIn, p_180513_2_, p_180513_3_);
}
public int getLoadedChunkCount()
{
return this.id2ChunkMap.getNumHashElements();
}
public void func_180514_a(Chunk p_180514_1_, int p_180514_2_, int p_180514_3_) {}
public Chunk func_177459_a(BlockPos p_177459_1_)
{
return this.provideChunk(p_177459_1_.getX() >> 4, p_177459_1_.getZ() >> 4);
}
}