package net.minecraft.src;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import net.minecraft.server.MinecraftServer;

public class AnvilSaveConverter extends SaveFormatOld {
	public AnvilSaveConverter(File par1File) {
		super(par1File);
	}

	protected int getSaveVersion() {
		return 19133;
	}

	public void flushCache() {
		RegionFileCache.clearRegionFileReferences();
	}

	/**
	 * Returns back a loader for the specified save directory
	 */
	public ISaveHandler getSaveLoader(String par1Str, boolean par2) {
		return new AnvilSaveHandler(this.savesDirectory, par1Str, par2);
	}

	/**
	 * gets if the map is old chunk saving (true) or McRegion (false)
	 */
	public boolean isOldMapFormat(String par1Str) {
		WorldInfo var2 = this.getWorldInfo(par1Str);
		return var2 != null && var2.getSaveVersion() != this.getSaveVersion();
	}

	/**
	 * converts the map to mcRegion
	 */
	public boolean convertMapFormat(String par1Str, IProgressUpdate par2IProgressUpdate) {
		par2IProgressUpdate.setLoadingProgress(0);
		ArrayList var3 = new ArrayList();
		ArrayList var4 = new ArrayList();
		ArrayList var5 = new ArrayList();
		File var6 = new File(this.savesDirectory, par1Str);
		File var7 = new File(var6, "DIM-1");
		File var8 = new File(var6, "DIM1");
		MinecraftServer.getServer().getLogAgent().func_98233_a("Scanning folders...");
		this.addRegionFilesToCollection(var6, var3);

		if (var7.exists()) {
			this.addRegionFilesToCollection(var7, var4);
		}

		if (var8.exists()) {
			this.addRegionFilesToCollection(var8, var5);
		}

		int var9 = var3.size() + var4.size() + var5.size();
		MinecraftServer.getServer().getLogAgent().func_98233_a("Total conversion count is " + var9);
		WorldInfo var10 = this.getWorldInfo(par1Str);
		Object var11 = null;

		if (var10.getTerrainType() == WorldType.FLAT) {
			var11 = new WorldChunkManagerHell(BiomeGenBase.plains, 0.5F, 0.5F);
		} else {
			var11 = new WorldChunkManager(var10.getSeed(), var10.getTerrainType());
		}

		this.convertFile(new File(var6, "region"), var3, (WorldChunkManager) var11, 0, var9, par2IProgressUpdate);
		this.convertFile(new File(var7, "region"), var4, new WorldChunkManagerHell(BiomeGenBase.hell, 1.0F, 0.0F),
				var3.size(), var9, par2IProgressUpdate);
		this.convertFile(new File(var8, "region"), var5, new WorldChunkManagerHell(BiomeGenBase.sky, 0.5F, 0.0F),
				var3.size() + var4.size(), var9, par2IProgressUpdate);
		var10.setSaveVersion(19133);

		if (var10.getTerrainType() == WorldType.DEFAULT_1_1) {
			var10.setTerrainType(WorldType.DEFAULT);
		}

		this.createFile(par1Str);
		ISaveHandler var12 = this.getSaveLoader(par1Str, false);
		var12.saveWorldInfo(var10);
		return true;
	}

	/**
	 * par: filename for the level.dat_mcr backup
	 */
	private void createFile(String par1Str) {
		File var2 = new File(this.savesDirectory, par1Str);

		if (!var2.exists()) {
			System.out.println("Warning: Unable to create level.dat_mcr backup");
		} else {
			File var3 = new File(var2, "level.dat");

			if (!var3.exists()) {
				System.out.println("Warning: Unable to create level.dat_mcr backup");
			} else {
				File var4 = new File(var2, "level.dat_mcr");

				if (!var3.renameTo(var4)) {
					System.out.println("Warning: Unable to create level.dat_mcr backup");
				}
			}
		}
	}

	private void convertFile(File par1File, Iterable par2Iterable, WorldChunkManager par3WorldChunkManager, int par4,
			int par5, IProgressUpdate par6IProgressUpdate) {
		Iterator var7 = par2Iterable.iterator();

		while (var7.hasNext()) {
			File var8 = (File) var7.next();
			this.convertChunks(par1File, var8, par3WorldChunkManager, par4, par5, par6IProgressUpdate);
			++par4;
			int var9 = (int) Math.round(100.0D * (double) par4 / (double) par5);
			par6IProgressUpdate.setLoadingProgress(var9);
		}
	}

	/**
	 * copies a 32x32 chunk set from par2File to par1File, via AnvilConverterData
	 */
	private void convertChunks(File par1File, File par2File, WorldChunkManager par3WorldChunkManager, int par4,
			int par5, IProgressUpdate par6IProgressUpdate) {
		try {
			String var7 = par2File.getName();
			RegionFile var8 = new RegionFile(par2File);
			RegionFile var9 = new RegionFile(
					new File(par1File, var7.substring(0, var7.length() - ".mcr".length()) + ".mca"));

			for (int var10 = 0; var10 < 32; ++var10) {
				int var11;

				for (var11 = 0; var11 < 32; ++var11) {
					if (var8.isChunkSaved(var10, var11) && !var9.isChunkSaved(var10, var11)) {
						DataInputStream var12 = var8.getChunkDataInputStream(var10, var11);

						if (var12 == null) {
							MinecraftServer.getServer().getLogAgent().func_98236_b("Failed to fetch input stream");
						} else {
							NBTTagCompound var13 = CompressedStreamTools.read(var12);
							var12.close();
							NBTTagCompound var14 = var13.getCompoundTag("Level");
							AnvilConverterData var15 = ChunkLoader.load(var14);
							NBTTagCompound var16 = new NBTTagCompound();
							NBTTagCompound var17 = new NBTTagCompound();
							var16.setTag("Level", var17);
							ChunkLoader.convertToAnvilFormat(var15, var17, par3WorldChunkManager);
							DataOutputStream var18 = var9.getChunkDataOutputStream(var10, var11);
							CompressedStreamTools.write(var16, var18);
							var18.close();
						}
					}
				}

				var11 = (int) Math.round(100.0D * (double) (par4 * 1024) / (double) (par5 * 1024));
				int var20 = (int) Math
						.round(100.0D * (double) ((var10 + 1) * 32 + par4 * 1024) / (double) (par5 * 1024));

				if (var20 > var11) {
					par6IProgressUpdate.setLoadingProgress(var20);
				}
			}

			var8.close();
			var9.close();
		} catch (IOException var19) {
			var19.printStackTrace();
		}
	}

	/**
	 * filters the files in the par1 directory, and adds them to the par2
	 * collections
	 */
	private void addRegionFilesToCollection(File par1File, Collection par2Collection) {
		File var3 = new File(par1File, "region");
		File[] var4 = var3.listFiles(new AnvilSaveConverterFileFilter(this));

		if (var4 != null) {
			Collections.addAll(par2Collection, var4);
		}
	}
}