package net.minecraft.world.gen;

import java.util.List;
import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.block.BlockFalling;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.init.Blocks;
import net.minecraft.util.IProgressUpdate;
import net.minecraft.util.MathHelper;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.SpawnerAnimals;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenDungeons;
import net.minecraft.world.gen.feature.WorldGenLakes;
import net.minecraft.world.gen.structure.MapGenMineshaft;
import net.minecraft.world.gen.structure.MapGenScatteredFeature;
import net.minecraft.world.gen.structure.MapGenStronghold;
import net.minecraft.world.gen.structure.MapGenVillage;

import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.*;
import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.*;
import net.minecraftforge.common.*;
import cpw.mods.fml.common.eventhandler.Event.*;
import net.minecraftforge.event.terraingen.*;

public class ChunkProviderGenerate implements IChunkProvider
{
	private Random rand;
	private NoiseGeneratorOctaves field_147431_j;
	private NoiseGeneratorOctaves field_147432_k;
	private NoiseGeneratorOctaves field_147429_l;
	private NoiseGeneratorPerlin field_147430_m;
	public NoiseGeneratorOctaves noiseGen5;
	public NoiseGeneratorOctaves noiseGen6;
	public NoiseGeneratorOctaves mobSpawnerNoise;
	private World worldObj;
	private final boolean mapFeaturesEnabled;
	private WorldType field_147435_p;
	private final double[] field_147434_q;
	private final float[] parabolicField;
	private double[] stoneNoise = new double[256];
	private MapGenBase caveGenerator = new MapGenCaves();
	private MapGenStronghold strongholdGenerator = new MapGenStronghold();
	private MapGenVillage villageGenerator = new MapGenVillage();
	private MapGenMineshaft mineshaftGenerator = new MapGenMineshaft();
	private MapGenScatteredFeature scatteredFeatureGenerator = new MapGenScatteredFeature();
	private MapGenBase ravineGenerator = new MapGenRavine();
	private BiomeGenBase[] biomesForGeneration;
	double[] field_147427_d;
	double[] field_147428_e;
	double[] field_147425_f;
	double[] field_147426_g;
	int[][] field_73219_j = new int[32][32];
	private static final String __OBFID = "CL_00000396";

	{
		caveGenerator = TerrainGen.getModdedMapGen(caveGenerator, CAVE);
		strongholdGenerator = (MapGenStronghold) TerrainGen.getModdedMapGen(strongholdGenerator, STRONGHOLD);
		villageGenerator = (MapGenVillage) TerrainGen.getModdedMapGen(villageGenerator, VILLAGE);
		mineshaftGenerator = (MapGenMineshaft) TerrainGen.getModdedMapGen(mineshaftGenerator, MINESHAFT);
		scatteredFeatureGenerator = (MapGenScatteredFeature) TerrainGen.getModdedMapGen(scatteredFeatureGenerator, SCATTERED_FEATURE);
		ravineGenerator = TerrainGen.getModdedMapGen(ravineGenerator, RAVINE);
	}    

	public ChunkProviderGenerate(World par1World, long par2, boolean par4)
	{
		this.worldObj = par1World;
		this.mapFeaturesEnabled = par4;
		this.field_147435_p = par1World.getWorldInfo().getTerrainType();
		this.rand = new Random(par2);
		this.field_147431_j = new NoiseGeneratorOctaves(this.rand, 16);
		this.field_147432_k = new NoiseGeneratorOctaves(this.rand, 16);
		this.field_147429_l = new NoiseGeneratorOctaves(this.rand, 8);
		this.field_147430_m = new NoiseGeneratorPerlin(this.rand, 4);
		this.noiseGen5 = new NoiseGeneratorOctaves(this.rand, 10);
		this.noiseGen6 = new NoiseGeneratorOctaves(this.rand, 16);
		this.mobSpawnerNoise = new NoiseGeneratorOctaves(this.rand, 8);
		this.field_147434_q = new double[825];
		this.parabolicField = new float[25];

		for (int j = -2; j <= 2; ++j)
		{
			for (int k = -2; k <= 2; ++k)
			{
				float f = 10.0F / MathHelper.sqrt_float((float)(j * j + k * k) + 0.2F);
				this.parabolicField[j + 2 + (k + 2) * 5] = f;
			}
		}

		NoiseGenerator[] noiseGens = {field_147431_j, field_147432_k, field_147429_l, field_147430_m, noiseGen5, noiseGen6, mobSpawnerNoise};
		noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.rand, noiseGens);
		this.field_147431_j = (NoiseGeneratorOctaves)noiseGens[0];
		this.field_147432_k = (NoiseGeneratorOctaves)noiseGens[1];
		this.field_147429_l = (NoiseGeneratorOctaves)noiseGens[2];
		this.field_147430_m = (NoiseGeneratorPerlin)noiseGens[3];
		this.noiseGen5 = (NoiseGeneratorOctaves)noiseGens[4];
		this.noiseGen6 = (NoiseGeneratorOctaves)noiseGens[5];
		this.mobSpawnerNoise = (NoiseGeneratorOctaves)noiseGens[6];
	}

	public void func_147424_a(int p_147424_1_, int p_147424_2_, Block[] p_147424_3_)
	{
		byte b0 = 63;
		this.biomesForGeneration = this.worldObj.getWorldChunkManager().getBiomesForGeneration(this.biomesForGeneration, p_147424_1_ * 4 - 2, p_147424_2_ * 4 - 2, 10, 10);
		this.func_147423_a(p_147424_1_ * 4, 0, p_147424_2_ * 4);

		for (int k = 0; k < 4; ++k)
		{
			int l = k * 5;
			int i1 = (k + 1) * 5;

			for (int j1 = 0; j1 < 4; ++j1)
			{
				int k1 = (l + j1) * 33;
				int l1 = (l + j1 + 1) * 33;
				int i2 = (i1 + j1) * 33;
				int j2 = (i1 + j1 + 1) * 33;

				for (int k2 = 0; k2 < 32; ++k2)
				{
					double d0 = 0.125D;
					double d1 = this.field_147434_q[k1 + k2];
					double d2 = this.field_147434_q[l1 + k2];
					double d3 = this.field_147434_q[i2 + k2];
					double d4 = this.field_147434_q[j2 + k2];
					double d5 = (this.field_147434_q[k1 + k2 + 1] - d1) * d0;
					double d6 = (this.field_147434_q[l1 + k2 + 1] - d2) * d0;
					double d7 = (this.field_147434_q[i2 + k2 + 1] - d3) * d0;
					double d8 = (this.field_147434_q[j2 + k2 + 1] - d4) * d0;

					for (int l2 = 0; l2 < 8; ++l2)
					{
						double d9 = 0.25D;
						double d10 = d1;
						double d11 = d2;
						double d12 = (d3 - d1) * d9;
						double d13 = (d4 - d2) * d9;

						for (int i3 = 0; i3 < 4; ++i3)
						{
							int j3 = i3 + k * 4 << 12 | 0 + j1 * 4 << 8 | k2 * 8 + l2;
							short short1 = 256;
							j3 -= short1;
							double d14 = 0.25D;
							double d16 = (d11 - d10) * d14;
							double d15 = d10 - d16;

							for (int k3 = 0; k3 < 4; ++k3)
							{
								if ((d15 += d16) > 0.0D)
								{
									p_147424_3_[j3 += short1] = Blocks.stone;
								}
								else if (k2 * 8 + l2 < b0)
								{
									p_147424_3_[j3 += short1] = Blocks.water;
								}
								else
								{
									p_147424_3_[j3 += short1] = null;
								}
							}

							d10 += d12;
							d11 += d13;
						}

						d1 += d5;
						d2 += d6;
						d3 += d7;
						d4 += d8;
					}
				}
			}
		}
	}

	public void replaceBlocksForBiome(int p_147422_1_, int p_147422_2_, Block[] p_147422_3_, byte[] p_147422_4_, BiomeGenBase[] p_147422_5_)
	{
		ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, p_147422_1_, p_147422_2_, p_147422_3_, p_147422_4_, p_147422_5_);
		MinecraftForge.EVENT_BUS.post(event);
		if (event.getResult() == Result.DENY) return;

		double d0 = 0.03125D;
		this.stoneNoise = this.field_147430_m.func_151599_a(this.stoneNoise, (double)(p_147422_1_ * 16), (double)(p_147422_2_ * 16), 16, 16, d0 * 2.0D, d0 * 2.0D, 1.0D);

		for (int k = 0; k < 16; ++k)
		{
			for (int l = 0; l < 16; ++l)
			{
				BiomeGenBase biomegenbase = p_147422_5_[l + k * 16];
				biomegenbase.genTerrainBlocks(this.worldObj, this.rand, p_147422_3_, p_147422_4_, p_147422_1_ * 16 + k, p_147422_2_ * 16 + l, this.stoneNoise[l + k * 16]);
			}
		}
	}

	public Chunk loadChunk(int par1, int par2)
	{
		return this.provideChunk(par1, par2);
	}

	public Chunk provideChunk(int par1, int par2)
	{
		this.rand.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
		Block[] ablock = new Block[65536];
		byte[] abyte = new byte[65536];
		this.func_147424_a(par1, par2, ablock);
		this.biomesForGeneration = this.worldObj.getWorldChunkManager().loadBlockGeneratorData(this.biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
		this.replaceBlocksForBiome(par1, par2, ablock, abyte, this.biomesForGeneration);
		this.caveGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
		this.ravineGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);

		if (this.mapFeaturesEnabled)
		{
			this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
			this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
			this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
			this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
		}

		Chunk chunk = new Chunk(this.worldObj, ablock, abyte, par1, par2);
		byte[] abyte1 = chunk.getBiomeArray();

		for (int k = 0; k < abyte1.length; ++k)
		{
			abyte1[k] = (byte)this.biomesForGeneration[k].biomeID;
		}

		chunk.generateSkylightMap();
		return chunk;
	}

	private void func_147423_a(int p_147423_1_, int p_147423_2_, int p_147423_3_)
	{
		double d0 = 684.412D;
		double d1 = 684.412D;
		double d2 = 512.0D;
		double d3 = 512.0D;
		this.field_147426_g = this.noiseGen6.generateNoiseOctaves(this.field_147426_g, p_147423_1_, p_147423_3_, 5, 5, 200.0D, 200.0D, 0.5D);
		this.field_147427_d = this.field_147429_l.generateNoiseOctaves(this.field_147427_d, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 8.555150000000001D, 4.277575000000001D, 8.555150000000001D);
		this.field_147428_e = this.field_147431_j.generateNoiseOctaves(this.field_147428_e, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
		this.field_147425_f = this.field_147432_k.generateNoiseOctaves(this.field_147425_f, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
		boolean flag1 = false;
		boolean flag = false;
		int l = 0;
		int i1 = 0;
		double d4 = 8.5D;

		for (int j1 = 0; j1 < 5; ++j1)
		{
			for (int k1 = 0; k1 < 5; ++k1)
			{
				float f = 0.0F;
				float f1 = 0.0F;
				float f2 = 0.0F;
				byte b0 = 2;
				BiomeGenBase biomegenbase = this.biomesForGeneration[j1 + 2 + (k1 + 2) * 10];

				for (int l1 = -b0; l1 <= b0; ++l1)
				{
					for (int i2 = -b0; i2 <= b0; ++i2)
					{
						BiomeGenBase biomegenbase1 = this.biomesForGeneration[j1 + l1 + 2 + (k1 + i2 + 2) * 10];
						float f3 = biomegenbase1.rootHeight;
						float f4 = biomegenbase1.heightVariation;

						if (this.field_147435_p == WorldType.AMPLIFIED && f3 > 0.0F)
						{
							f3 = 1.0F + f3 * 2.0F;
							f4 = 1.0F + f4 * 4.0F;
						}

						float f5 = this.parabolicField[l1 + 2 + (i2 + 2) * 5] / (f3 + 2.0F);

						if (biomegenbase1.rootHeight > biomegenbase.rootHeight)
						{
							f5 /= 2.0F;
						}

						f += f4 * f5;
						f1 += f3 * f5;
						f2 += f5;
					}
				}

				f /= f2;
				f1 /= f2;
				f = f * 0.9F + 0.1F;
				f1 = (f1 * 4.0F - 1.0F) / 8.0F;
				double d12 = this.field_147426_g[i1] / 8000.0D;

				if (d12 < 0.0D)
				{
					d12 = -d12 * 0.3D;
				}

				d12 = d12 * 3.0D - 2.0D;

				if (d12 < 0.0D)
				{
					d12 /= 2.0D;

					if (d12 < -1.0D)
					{
						d12 = -1.0D;
					}

					d12 /= 1.4D;
					d12 /= 2.0D;
				}
				else
				{
					if (d12 > 1.0D)
					{
						d12 = 1.0D;
					}

					d12 /= 8.0D;
				}

				++i1;
				double d13 = (double)f1;
				double d14 = (double)f;
				d13 += d12 * 0.2D;
				d13 = d13 * 8.5D / 8.0D;
				double d5 = 8.5D + d13 * 4.0D;

				for (int j2 = 0; j2 < 33; ++j2)
				{
					double d6 = ((double)j2 - d5) * 12.0D * 128.0D / 256.0D / d14;

					if (d6 < 0.0D)
					{
						d6 *= 4.0D;
					}

					double d7 = this.field_147428_e[l] / 512.0D;
					double d8 = this.field_147425_f[l] / 512.0D;
					double d9 = (this.field_147427_d[l] / 10.0D + 1.0D) / 2.0D;
					double d10 = MathHelper.denormalizeClamp(d7, d8, d9) - d6;

					if (j2 > 29)
					{
						double d11 = (double)((float)(j2 - 29) / 3.0F);
						d10 = d10 * (1.0D - d11) + -10.0D * d11;
					}

					this.field_147434_q[l] = d10;
					++l;
				}
			}
		}
	}

	public boolean chunkExists(int par1, int par2)
	{
		return true;
	}

	public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
	{
		BlockFalling.fallInstantly = true;
		int k = par2 * 16;
		int l = par3 * 16;
		BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(k + 16, l + 16);
		this.rand.setSeed(this.worldObj.getSeed());
		long i1 = this.rand.nextLong() / 2L * 2L + 1L;
		long j1 = this.rand.nextLong() / 2L * 2L + 1L;
		this.rand.setSeed((long)par2 * i1 + (long)par3 * j1 ^ this.worldObj.getSeed());
		boolean flag = false;

		MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, rand, par2, par3, flag));

		if (this.mapFeaturesEnabled)
		{
			this.mineshaftGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
			flag = this.villageGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
			this.strongholdGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
			this.scatteredFeatureGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
		}

		int k1;
		int l1;
		int i2;

		if (biomegenbase != BiomeGenBase.desert && biomegenbase != BiomeGenBase.desertHills && !flag && this.rand.nextInt(4) == 0
			&& TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAKE))
		{
			k1 = k + this.rand.nextInt(16) + 8;
			l1 = this.rand.nextInt(256);
			i2 = l + this.rand.nextInt(16) + 8;
			(new WorldGenLakes(Blocks.water)).generate(this.worldObj, this.rand, k1, l1, i2);
		}

		if (TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAVA) && !flag && this.rand.nextInt(8) == 0)
		{
			k1 = k + this.rand.nextInt(16) + 8;
			l1 = this.rand.nextInt(this.rand.nextInt(248) + 8);
			i2 = l + this.rand.nextInt(16) + 8;

			if (l1 < 63 || this.rand.nextInt(10) == 0)
			{
				(new WorldGenLakes(Blocks.lava)).generate(this.worldObj, this.rand, k1, l1, i2);
			}
		}

		boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, DUNGEON);
		for (k1 = 0; doGen && k1 < 8; ++k1)
		{
			l1 = k + this.rand.nextInt(16) + 8;
			i2 = this.rand.nextInt(256);
			int j2 = l + this.rand.nextInt(16) + 8;
			(new WorldGenDungeons()).generate(this.worldObj, this.rand, l1, i2, j2);
		}

		biomegenbase.decorate(this.worldObj, this.rand, k, l);
		if (TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, ANIMALS))
		{
		SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);
		}
		k += 8;
		l += 8;

		doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, ICE);
		for (k1 = 0; doGen && k1 < 16; ++k1)
		{
			for (l1 = 0; l1 < 16; ++l1)
			{
				i2 = this.worldObj.getPrecipitationHeight(k + k1, l + l1);

				if (this.worldObj.isBlockFreezable(k1 + k, i2 - 1, l1 + l))
				{
					this.worldObj.setBlock(k1 + k, i2 - 1, l1 + l, Blocks.ice, 0, 2);
				}

				if (this.worldObj.func_147478_e(k1 + k, i2, l1 + l, true))
				{
					this.worldObj.setBlock(k1 + k, i2, l1 + l, Blocks.snow_layer, 0, 2);
				}
			}
		}

		MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, rand, par2, par3, flag));

		BlockFalling.fallInstantly = false;
	}

	public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
	{
		return true;
	}

	public void saveExtraData() {}

	public boolean unloadQueuedChunks()
	{
		return false;
	}

	public boolean canSave()
	{
		return true;
	}

	public String makeString()
	{
		return "RandomLevelSource";
	}

	public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
	{
		BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(par2, par4);
		return par1EnumCreatureType == EnumCreatureType.monster && this.scatteredFeatureGenerator.func_143030_a(par2, par3, par4) ? this.scatteredFeatureGenerator.getScatteredFeatureSpawnList() : biomegenbase.getSpawnableList(par1EnumCreatureType);
	}

	public ChunkPosition func_147416_a(World p_147416_1_, String p_147416_2_, int p_147416_3_, int p_147416_4_, int p_147416_5_)
	{
		return "Stronghold".equals(p_147416_2_) && this.strongholdGenerator != null ? this.strongholdGenerator.func_151545_a(p_147416_1_, p_147416_3_, p_147416_4_, p_147416_5_) : null;
	}

	public int getLoadedChunkCount()
	{
		return 0;
	}

	public void recreateStructures(int par1, int par2)
	{
		if (this.mapFeaturesEnabled)
		{
			this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
			this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
			this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
			this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
		}
	}
}