package mod.acgaming.spackenmobs.entities;

import java.util.List;
import java.util.UUID;

import javax.annotation.Nullable;

import com.google.common.collect.Lists;

import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.ProjectileHelper;
import net.minecraft.init.MobEffects;
import net.minecraft.init.SoundEvents;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTUtil;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.util.math.RayTraceResult;
import net.minecraft.world.EnumDifficulty;
import net.minecraft.world.World;
import net.minecraft.world.WorldServer;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class EntitySchalkerBullet extends Entity
{
	private EntityLivingBase owner;
	private Entity target;
	@Nullable
	private EnumFacing direction;
	private int steps;
	private double targetDeltaX;
	private double targetDeltaY;
	private double targetDeltaZ;
	@Nullable
	private UUID ownerUniqueId;
	private BlockPos ownerBlockPos;
	@Nullable
	private UUID targetUniqueId;
	private BlockPos targetBlockPos;

	public EntitySchalkerBullet(World worldIn)
	{
		super(worldIn);
		this.setSize(0.3125F, 0.3125F);
		this.noClip = true;
	}

	@SideOnly(Side.CLIENT)
	public EntitySchalkerBullet(World worldIn, double x, double y, double z, double motionXIn, double motionYIn, double motionZIn)
	{
		this(worldIn);
		this.setLocationAndAngles(x, y, z, this.rotationYaw, this.rotationPitch);
		this.motionX = motionXIn;
		this.motionY = motionYIn;
		this.motionZ = motionZIn;
	}

	public EntitySchalkerBullet(World worldIn, EntityLivingBase ownerIn, Entity targetIn, EnumFacing.Axis p_i46772_4_)
	{
		this(worldIn);
		this.owner = ownerIn;
		BlockPos blockpos = new BlockPos(ownerIn);
		double d0 = blockpos.getX() + 0.5D;
		double d1 = blockpos.getY() + 0.5D;
		double d2 = blockpos.getZ() + 0.5D;
		this.setLocationAndAngles(d0, d1, d2, this.rotationYaw, this.rotationPitch);
		this.target = targetIn;
		this.direction = EnumFacing.UP;
		this.selectNextMoveDirection(p_i46772_4_);
	}

	/**
	 * Called when the entity is attacked.
	 */
	@Override
	public boolean attackEntityFrom(DamageSource source, float amount)
	{
		if (!this.world.isRemote)
		{
			this.playSound(SoundEvents.ENTITY_SHULKER_BULLET_HURT, 1.0F, 1.0F);
			((WorldServer) this.world).spawnParticle(EnumParticleTypes.CRIT, this.posX, this.posY, this.posZ, 15, 0.2D, 0.2D, 0.2D, 0.0D);
			this.setDead();
		}

		return true;
	}

	protected void bulletHit(RayTraceResult result)
	{
		if (result.entityHit == null)
		{
			((WorldServer) this.world).spawnParticle(EnumParticleTypes.EXPLOSION_LARGE, this.posX, this.posY, this.posZ, 2, 0.2D, 0.2D, 0.2D, 0.0D);
			this.playSound(SoundEvents.ENTITY_SHULKER_BULLET_HIT, 1.0F, 1.0F);
		}
		else
		{
			boolean flag = result.entityHit.attackEntityFrom(DamageSource.causeIndirectDamage(this, this.owner).setProjectile(), 4.0F);

			if (flag)
			{
				this.applyEnchantments(this.owner, result.entityHit);

				if (result.entityHit instanceof EntityLivingBase)
				{
					((EntityLivingBase) result.entityHit).addPotionEffect(new PotionEffect(MobEffects.LEVITATION, 200));
				}
			}
		}

		this.setDead();
	}

	/**
	 * Returns true if other Entities should be prevented from moving through this Entity.
	 */
	@Override
	public boolean canBeCollidedWith()
	{
		return true;
	}

	@Override
	protected void entityInit()
	{
	}

	/**
	 * Gets how bright this entity is.
	 */
	@Override
	public float getBrightness()
	{
		return 1.0F;
	}

	@Override
	@SideOnly(Side.CLIENT)
	public int getBrightnessForRender()
	{
		return 15728880;
	}

	@Override
	public SoundCategory getSoundCategory()
	{
		return SoundCategory.HOSTILE;
	}

	/**
	 * Returns true if the entity is on fire. Used by render to add the fire effect on rendering.
	 */
	@Override
	public boolean isBurning()
	{
		return false;
	}

	/**
	 * Checks if the entity is in range to render.
	 */
	@Override
	@SideOnly(Side.CLIENT)
	public boolean isInRangeToRenderDist(double distance)
	{
		return distance < 16384.0D;
	}

	/**
	 * Called to update the entity's position/logic.
	 */
	@Override
	public void onUpdate()
	{
		if (!this.world.isRemote && this.world.getDifficulty() == EnumDifficulty.PEACEFUL)
		{
			this.setDead();
		}
		else
		{
			super.onUpdate();

			if (!this.world.isRemote)
			{
				if (this.target == null && this.targetUniqueId != null)
				{
					for (EntityLivingBase entitylivingbase : this.world.getEntitiesWithinAABB(EntityLivingBase.class,
							new AxisAlignedBB(this.targetBlockPos.add(-2, -2, -2), this.targetBlockPos.add(2, 2, 2))))
					{
						if (entitylivingbase.getUniqueID().equals(this.targetUniqueId))
						{
							this.target = entitylivingbase;
							break;
						}
					}

					this.targetUniqueId = null;
				}

				if (this.owner == null && this.ownerUniqueId != null)
				{
					for (EntityLivingBase entitylivingbase1 : this.world.getEntitiesWithinAABB(EntityLivingBase.class,
							new AxisAlignedBB(this.ownerBlockPos.add(-2, -2, -2), this.ownerBlockPos.add(2, 2, 2))))
					{
						if (entitylivingbase1.getUniqueID().equals(this.ownerUniqueId))
						{
							this.owner = entitylivingbase1;
							break;
						}
					}

					this.ownerUniqueId = null;
				}

				if (this.target == null || !this.target.isEntityAlive() || this.target instanceof EntityPlayer && ((EntityPlayer) this.target).isSpectator())
				{
					if (!this.hasNoGravity())
					{
						this.motionY -= 0.04D;
					}
				}
				else
				{
					this.targetDeltaX = MathHelper.clamp(this.targetDeltaX * 1.025D, -1.0D, 1.0D);
					this.targetDeltaY = MathHelper.clamp(this.targetDeltaY * 1.025D, -1.0D, 1.0D);
					this.targetDeltaZ = MathHelper.clamp(this.targetDeltaZ * 1.025D, -1.0D, 1.0D);
					this.motionX += (this.targetDeltaX - this.motionX) * 0.2D;
					this.motionY += (this.targetDeltaY - this.motionY) * 0.2D;
					this.motionZ += (this.targetDeltaZ - this.motionZ) * 0.2D;
				}

				RayTraceResult raytraceresult = ProjectileHelper.forwardsRaycast(this, true, false, this.owner);

				if (raytraceresult != null && !net.minecraftforge.event.ForgeEventFactory.onProjectileImpact(this, raytraceresult))
				{
					this.bulletHit(raytraceresult);
				}
			}

			this.setPosition(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
			ProjectileHelper.rotateTowardsMovement(this, 0.5F);

			if (this.world.isRemote)
			{
				this.world.spawnParticle(EnumParticleTypes.END_ROD, this.posX - this.motionX, this.posY - this.motionY + 0.15D, this.posZ - this.motionZ, 0.0D, 0.0D, 0.0D);
			}
			else if (this.target != null && !this.target.isDead)
			{
				if (this.steps > 0)
				{
					--this.steps;

					if (this.steps == 0)
					{
						this.selectNextMoveDirection(this.direction == null ? null : this.direction.getAxis());
					}
				}

				if (this.direction != null)
				{
					BlockPos blockpos = new BlockPos(this);
					EnumFacing.Axis enumfacing$axis = this.direction.getAxis();

					if (this.world.isBlockNormalCube(blockpos.offset(this.direction), false))
					{
						this.selectNextMoveDirection(enumfacing$axis);
					}
					else
					{
						BlockPos blockpos1 = new BlockPos(this.target);

						if (enumfacing$axis == EnumFacing.Axis.X && blockpos.getX() == blockpos1.getX() || enumfacing$axis == EnumFacing.Axis.Z && blockpos.getZ() == blockpos1.getZ()
								|| enumfacing$axis == EnumFacing.Axis.Y && blockpos.getY() == blockpos1.getY())
						{
							this.selectNextMoveDirection(enumfacing$axis);
						}
					}
				}
			}
		}
	}

	/**
	 * (abstract) Protected helper method to read subclass entity data from NBT.
	 */
	@Override
	protected void readEntityFromNBT(NBTTagCompound compound)
	{
		this.steps = compound.getInteger("Steps");
		this.targetDeltaX = compound.getDouble("TXD");
		this.targetDeltaY = compound.getDouble("TYD");
		this.targetDeltaZ = compound.getDouble("TZD");

		if (compound.hasKey("Dir", 99))
		{
			this.direction = EnumFacing.getFront(compound.getInteger("Dir"));
		}

		if (compound.hasKey("Owner", 10))
		{
			NBTTagCompound nbttagcompound = compound.getCompoundTag("Owner");
			this.ownerUniqueId = NBTUtil.getUUIDFromTag(nbttagcompound);
			this.ownerBlockPos = new BlockPos(nbttagcompound.getInteger("X"), nbttagcompound.getInteger("Y"), nbttagcompound.getInteger("Z"));
		}

		if (compound.hasKey("Target", 10))
		{
			NBTTagCompound nbttagcompound1 = compound.getCompoundTag("Target");
			this.targetUniqueId = NBTUtil.getUUIDFromTag(nbttagcompound1);
			this.targetBlockPos = new BlockPos(nbttagcompound1.getInteger("X"), nbttagcompound1.getInteger("Y"), nbttagcompound1.getInteger("Z"));
		}
	}

	private void selectNextMoveDirection(@Nullable
	EnumFacing.Axis p_184569_1_)
	{
		double d0 = 0.5D;
		BlockPos blockpos;

		if (this.target == null)
		{
			blockpos = (new BlockPos(this)).down();
		}
		else
		{
			d0 = this.target.height * 0.5D;
			blockpos = new BlockPos(this.target.posX, this.target.posY + d0, this.target.posZ);
		}

		double d1 = blockpos.getX() + 0.5D;
		double d2 = blockpos.getY() + d0;
		double d3 = blockpos.getZ() + 0.5D;
		EnumFacing enumfacing = null;

		if (blockpos.distanceSqToCenter(this.posX, this.posY, this.posZ) >= 4.0D)
		{
			BlockPos blockpos1 = new BlockPos(this);
			List<EnumFacing> list = Lists.<EnumFacing>newArrayList();

			if (p_184569_1_ != EnumFacing.Axis.X)
			{
				if (blockpos1.getX() < blockpos.getX() && this.world.isAirBlock(blockpos1.east()))
				{
					list.add(EnumFacing.EAST);
				}
				else if (blockpos1.getX() > blockpos.getX() && this.world.isAirBlock(blockpos1.west()))
				{
					list.add(EnumFacing.WEST);
				}
			}

			if (p_184569_1_ != EnumFacing.Axis.Y)
			{
				if (blockpos1.getY() < blockpos.getY() && this.world.isAirBlock(blockpos1.up()))
				{
					list.add(EnumFacing.UP);
				}
				else if (blockpos1.getY() > blockpos.getY() && this.world.isAirBlock(blockpos1.down()))
				{
					list.add(EnumFacing.DOWN);
				}
			}

			if (p_184569_1_ != EnumFacing.Axis.Z)
			{
				if (blockpos1.getZ() < blockpos.getZ() && this.world.isAirBlock(blockpos1.south()))
				{
					list.add(EnumFacing.SOUTH);
				}
				else if (blockpos1.getZ() > blockpos.getZ() && this.world.isAirBlock(blockpos1.north()))
				{
					list.add(EnumFacing.NORTH);
				}
			}

			enumfacing = EnumFacing.random(this.rand);

			if (list.isEmpty())
			{
				for (int i = 5; !this.world.isAirBlock(blockpos1.offset(enumfacing)) && i > 0; --i)
				{
					enumfacing = EnumFacing.random(this.rand);
				}
			}
			else
			{
				enumfacing = list.get(this.rand.nextInt(list.size()));
			}

			d1 = this.posX + enumfacing.getFrontOffsetX();
			d2 = this.posY + enumfacing.getFrontOffsetY();
			d3 = this.posZ + enumfacing.getFrontOffsetZ();
		}

		this.setDirection(enumfacing);
		double d6 = d1 - this.posX;
		double d7 = d2 - this.posY;
		double d4 = d3 - this.posZ;
		double d5 = MathHelper.sqrt(d6 * d6 + d7 * d7 + d4 * d4);

		if (d5 == 0.0D)
		{
			this.targetDeltaX = 0.0D;
			this.targetDeltaY = 0.0D;
			this.targetDeltaZ = 0.0D;
		}
		else
		{
			this.targetDeltaX = d6 / d5 * 0.15D;
			this.targetDeltaY = d7 / d5 * 0.15D;
			this.targetDeltaZ = d4 / d5 * 0.15D;
		}

		this.isAirBorne = true;
		this.steps = 10 + this.rand.nextInt(5) * 10;
	}

	private void setDirection(@Nullable
	EnumFacing directionIn)
	{
		this.direction = directionIn;
	}

	/**
	 * (abstract) Protected helper method to write subclass entity data to NBT.
	 */
	@Override
	protected void writeEntityToNBT(NBTTagCompound compound)
	{
		if (this.owner != null)
		{
			BlockPos blockpos = new BlockPos(this.owner);
			NBTTagCompound nbttagcompound = NBTUtil.createUUIDTag(this.owner.getUniqueID());
			nbttagcompound.setInteger("X", blockpos.getX());
			nbttagcompound.setInteger("Y", blockpos.getY());
			nbttagcompound.setInteger("Z", blockpos.getZ());
			compound.setTag("Owner", nbttagcompound);
		}

		if (this.target != null)
		{
			BlockPos blockpos1 = new BlockPos(this.target);
			NBTTagCompound nbttagcompound1 = NBTUtil.createUUIDTag(this.target.getUniqueID());
			nbttagcompound1.setInteger("X", blockpos1.getX());
			nbttagcompound1.setInteger("Y", blockpos1.getY());
			nbttagcompound1.setInteger("Z", blockpos1.getZ());
			compound.setTag("Target", nbttagcompound1);
		}

		if (this.direction != null)
		{
			compound.setInteger("Dir", this.direction.getIndex());
		}

		compound.setInteger("Steps", this.steps);
		compound.setDouble("TXD", this.targetDeltaX);
		compound.setDouble("TYD", this.targetDeltaY);
		compound.setDouble("TZD", this.targetDeltaZ);
	}
}