package net.minecraft.src;

public class ChunkLoader {
	public static AnvilConverterData load(NBTTagCompound par0NBTTagCompound) {
		int var1 = par0NBTTagCompound.getInteger("xPos");
		int var2 = par0NBTTagCompound.getInteger("zPos");
		AnvilConverterData var3 = new AnvilConverterData(var1, var2);
		var3.blocks = par0NBTTagCompound.getByteArray("Blocks");
		var3.data = new NibbleArrayReader(par0NBTTagCompound.getByteArray("Data"), 7);
		var3.skyLight = new NibbleArrayReader(par0NBTTagCompound.getByteArray("SkyLight"), 7);
		var3.blockLight = new NibbleArrayReader(par0NBTTagCompound.getByteArray("BlockLight"), 7);
		var3.heightmap = par0NBTTagCompound.getByteArray("HeightMap");
		var3.terrainPopulated = par0NBTTagCompound.getBoolean("TerrainPopulated");
		var3.entities = par0NBTTagCompound.getTagList("Entities");
		var3.tileEntities = par0NBTTagCompound.getTagList("TileEntities");
		var3.tileTicks = par0NBTTagCompound.getTagList("TileTicks");

		try {
			var3.lastUpdated = par0NBTTagCompound.getLong("LastUpdate");
		} catch (ClassCastException var5) {
			var3.lastUpdated = (long) par0NBTTagCompound.getInteger("LastUpdate");
		}

		return var3;
	}

	public static void convertToAnvilFormat(AnvilConverterData par0AnvilConverterData,
			NBTTagCompound par1NBTTagCompound, WorldChunkManager par2WorldChunkManager) {
		par1NBTTagCompound.setInteger("xPos", par0AnvilConverterData.x);
		par1NBTTagCompound.setInteger("zPos", par0AnvilConverterData.z);
		par1NBTTagCompound.setLong("LastUpdate", par0AnvilConverterData.lastUpdated);
		int[] var3 = new int[par0AnvilConverterData.heightmap.length];

		for (int var4 = 0; var4 < par0AnvilConverterData.heightmap.length; ++var4) {
			var3[var4] = par0AnvilConverterData.heightmap[var4];
		}

		par1NBTTagCompound.setIntArray("HeightMap", var3);
		par1NBTTagCompound.setBoolean("TerrainPopulated", par0AnvilConverterData.terrainPopulated);
		NBTTagList var16 = new NBTTagList("Sections");
		int var7;

		for (int var5 = 0; var5 < 8; ++var5) {
			boolean var6 = true;

			for (var7 = 0; var7 < 16 && var6; ++var7) {
				int var8 = 0;

				while (var8 < 16 && var6) {
					int var9 = 0;

					while (true) {
						if (var9 < 16) {
							int var10 = var7 << 11 | var9 << 7 | var8 + (var5 << 4);
							byte var11 = par0AnvilConverterData.blocks[var10];

							if (var11 == 0) {
								++var9;
								continue;
							}

							var6 = false;
						}

						++var8;
						break;
					}
				}
			}

			if (!var6) {
				byte[] var19 = new byte[4096];
				NibbleArray var20 = new NibbleArray(var19.length, 4);
				NibbleArray var21 = new NibbleArray(var19.length, 4);
				NibbleArray var22 = new NibbleArray(var19.length, 4);

				for (int var23 = 0; var23 < 16; ++var23) {
					for (int var12 = 0; var12 < 16; ++var12) {
						for (int var13 = 0; var13 < 16; ++var13) {
							int var14 = var23 << 11 | var13 << 7 | var12 + (var5 << 4);
							byte var15 = par0AnvilConverterData.blocks[var14];
							var19[var12 << 8 | var13 << 4 | var23] = (byte) (var15 & 255);
							var20.set(var23, var12, var13,
									par0AnvilConverterData.data.get(var23, var12 + (var5 << 4), var13));
							var21.set(var23, var12, var13,
									par0AnvilConverterData.skyLight.get(var23, var12 + (var5 << 4), var13));
							var22.set(var23, var12, var13,
									par0AnvilConverterData.blockLight.get(var23, var12 + (var5 << 4), var13));
						}
					}
				}

				NBTTagCompound var24 = new NBTTagCompound();
				var24.setByte("Y", (byte) (var5 & 255));
				var24.setByteArray("Blocks", var19);
				var24.setByteArray("Data", var20.data);
				var24.setByteArray("SkyLight", var21.data);
				var24.setByteArray("BlockLight", var22.data);
				var16.appendTag(var24);
			}
		}

		par1NBTTagCompound.setTag("Sections", var16);
		byte[] var17 = new byte[256];

		for (int var18 = 0; var18 < 16; ++var18) {
			for (var7 = 0; var7 < 16; ++var7) {
				var17[var7 << 4
						| var18] = (byte) (par2WorldChunkManager.getBiomeGenAt(par0AnvilConverterData.x << 4 | var18,
								par0AnvilConverterData.z << 4 | var7).biomeID & 255);
			}
		}

		par1NBTTagCompound.setByteArray("Biomes", var17);
		par1NBTTagCompound.setTag("Entities", par0AnvilConverterData.entities);
		par1NBTTagCompound.setTag("TileEntities", par0AnvilConverterData.tileEntities);

		if (par0AnvilConverterData.tileTicks != null) {
			par1NBTTagCompound.setTag("TileTicks", par0AnvilConverterData.tileTicks);
		}
	}
}