package net.minecraft.world;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.enchantment.EnchantmentProtection;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.item.EntityTNTPrimed;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.DamageSource;
import net.minecraft.util.MathHelper;
import net.minecraft.util.Vec3;

public class Explosion
{
	public boolean isFlaming;
	public boolean isSmoking = true;
	private int field_77289_h = 16;
	private Random explosionRNG = new Random();
	private World worldObj;
	public double explosionX;
	public double explosionY;
	public double explosionZ;
	public Entity exploder;
	public float explosionSize;
	public List affectedBlockPositions = new ArrayList();
	private Map field_77288_k = new HashMap();
	private static final String __OBFID = "CL_00000134";

	public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
	{
		this.worldObj = par1World;
		this.exploder = par2Entity;
		this.explosionSize = par9;
		this.explosionX = par3;
		this.explosionY = par5;
		this.explosionZ = par7;
	}

	public void doExplosionA()
	{
		float f = this.explosionSize;
		HashSet hashset = new HashSet();
		int i;
		int j;
		int k;
		double d5;
		double d6;
		double d7;

		for (i = 0; i < this.field_77289_h; ++i)
		{
			for (j = 0; j < this.field_77289_h; ++j)
			{
				for (k = 0; k < this.field_77289_h; ++k)
				{
					if (i == 0 || i == this.field_77289_h - 1 || j == 0 || j == this.field_77289_h - 1 || k == 0 || k == this.field_77289_h - 1)
					{
						double d0 = (double)((float)i / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
						double d1 = (double)((float)j / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
						double d2 = (double)((float)k / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
						double d3 = Math.sqrt(d0 * d0 + d1 * d1 + d2 * d2);
						d0 /= d3;
						d1 /= d3;
						d2 /= d3;
						float f1 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
						d5 = this.explosionX;
						d6 = this.explosionY;
						d7 = this.explosionZ;

						for (float f2 = 0.3F; f1 > 0.0F; f1 -= f2 * 0.75F)
						{
							int j1 = MathHelper.floor_double(d5);
							int k1 = MathHelper.floor_double(d6);
							int l1 = MathHelper.floor_double(d7);
							Block block = this.worldObj.getBlock(j1, k1, l1);

							if (block.getMaterial() != Material.air)
							{
								float f3 = this.exploder != null ? this.exploder.func_145772_a(this, this.worldObj, j1, k1, l1, block) : block.getExplosionResistance(this.exploder, worldObj, j1, k1, l1, explosionX, explosionY, explosionZ);
								f1 -= (f3 + 0.3F) * f2;
							}

							if (f1 > 0.0F && (this.exploder == null || this.exploder.func_145774_a(this, this.worldObj, j1, k1, l1, block, f1)))
							{
								hashset.add(new ChunkPosition(j1, k1, l1));
							}

							d5 += d0 * (double)f2;
							d6 += d1 * (double)f2;
							d7 += d2 * (double)f2;
						}
					}
				}
			}
		}

		this.affectedBlockPositions.addAll(hashset);
		this.explosionSize *= 2.0F;
		i = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
		j = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
		k = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
		int i2 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
		int l = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
		int j2 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
		List list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().getAABB((double)i, (double)k, (double)l, (double)j, (double)i2, (double)j2));
		Vec3 vec3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);

		for (int i1 = 0; i1 < list.size(); ++i1)
		{
			Entity entity = (Entity)list.get(i1);
			double d4 = entity.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;

			if (d4 <= 1.0D)
			{
				d5 = entity.posX - this.explosionX;
				d6 = entity.posY + (double)entity.getEyeHeight() - this.explosionY;
				d7 = entity.posZ - this.explosionZ;
				double d9 = (double)MathHelper.sqrt_double(d5 * d5 + d6 * d6 + d7 * d7);

				if (d9 != 0.0D)
				{
					d5 /= d9;
					d6 /= d9;
					d7 /= d9;
					double d10 = (double)this.worldObj.getBlockDensity(vec3, entity.boundingBox);
					double d11 = (1.0D - d4) * d10;
					entity.attackEntityFrom(DamageSource.setExplosionSource(this), (float)((int)((d11 * d11 + d11) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D)));
					double d8 = EnchantmentProtection.func_92092_a(entity, d11);
					entity.motionX += d5 * d8;
					entity.motionY += d6 * d8;
					entity.motionZ += d7 * d8;

					if (entity instanceof EntityPlayer)
					{
						this.field_77288_k.put((EntityPlayer)entity, this.worldObj.getWorldVec3Pool().getVecFromPool(d5 * d11, d6 * d11, d7 * d11));
					}
				}
			}
		}

		this.explosionSize = f;
	}

	public void doExplosionB(boolean par1)
	{
		this.worldObj.playSoundEffect(this.explosionX, this.explosionY, this.explosionZ, "random.explode", 4.0F, (1.0F + (this.worldObj.rand.nextFloat() - this.worldObj.rand.nextFloat()) * 0.2F) * 0.7F);

		if (this.explosionSize >= 2.0F && this.isSmoking)
		{
			this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
		}
		else
		{
			this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
		}

		Iterator iterator;
		ChunkPosition chunkposition;
		int i;
		int j;
		int k;
		Block block;

		if (this.isSmoking)
		{
			iterator = this.affectedBlockPositions.iterator();

			while (iterator.hasNext())
			{
				chunkposition = (ChunkPosition)iterator.next();
				i = chunkposition.chunkPosX;
				j = chunkposition.chunkPosY;
				k = chunkposition.chunkPosZ;
				block = this.worldObj.getBlock(i, j, k);

				if (par1)
				{
					double d0 = (double)((float)i + this.worldObj.rand.nextFloat());
					double d1 = (double)((float)j + this.worldObj.rand.nextFloat());
					double d2 = (double)((float)k + this.worldObj.rand.nextFloat());
					double d3 = d0 - this.explosionX;
					double d4 = d1 - this.explosionY;
					double d5 = d2 - this.explosionZ;
					double d6 = (double)MathHelper.sqrt_double(d3 * d3 + d4 * d4 + d5 * d5);
					d3 /= d6;
					d4 /= d6;
					d5 /= d6;
					double d7 = 0.5D / (d6 / (double)this.explosionSize + 0.1D);
					d7 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
					d3 *= d7;
					d4 *= d7;
					d5 *= d7;
					this.worldObj.spawnParticle("explode", (d0 + this.explosionX * 1.0D) / 2.0D, (d1 + this.explosionY * 1.0D) / 2.0D, (d2 + this.explosionZ * 1.0D) / 2.0D, d3, d4, d5);
					this.worldObj.spawnParticle("smoke", d0, d1, d2, d3, d4, d5);
				}

				if (block.getMaterial() != Material.air)
				{
					if (block.canDropFromExplosion(this))
					{
						block.dropBlockAsItemWithChance(this.worldObj, i, j, k, this.worldObj.getBlockMetadata(i, j, k), 1.0F / this.explosionSize, 0);
					}

					block.onBlockExploded(this.worldObj, i, j, k, this);
				}
			}
		}

		if (this.isFlaming)
		{
			iterator = this.affectedBlockPositions.iterator();

			while (iterator.hasNext())
			{
				chunkposition = (ChunkPosition)iterator.next();
				i = chunkposition.chunkPosX;
				j = chunkposition.chunkPosY;
				k = chunkposition.chunkPosZ;
				block = this.worldObj.getBlock(i, j, k);
				Block block1 = this.worldObj.getBlock(i, j - 1, k);

				if (block.getMaterial() == Material.air && block1.func_149730_j() && this.explosionRNG.nextInt(3) == 0)
				{
					this.worldObj.setBlock(i, j, k, Blocks.fire);
				}
			}
		}
	}

	public Map func_77277_b()
	{
		return this.field_77288_k;
	}

	public EntityLivingBase getExplosivePlacedBy()
	{
		return this.exploder == null ? null : (this.exploder instanceof EntityTNTPrimed ? ((EntityTNTPrimed)this.exploder).getTntPlacedBy() : (this.exploder instanceof EntityLivingBase ? (EntityLivingBase)this.exploder : null));
	}
}