package net.minecraft.entity.ai;

import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.util.MathHelper;

public class EntityMoveHelper
{
	private EntityLiving entity;
	private double posX;
	private double posY;
	private double posZ;
	private double speed;
	private boolean update;
	private static final String __OBFID = "CL_00001573";

	public EntityMoveHelper(EntityLiving par1EntityLiving)
	{
		this.entity = par1EntityLiving;
		this.posX = par1EntityLiving.posX;
		this.posY = par1EntityLiving.posY;
		this.posZ = par1EntityLiving.posZ;
	}

	public boolean isUpdating()
	{
		return this.update;
	}

	public double getSpeed()
	{
		return this.speed;
	}

	public void setMoveTo(double par1, double par3, double par5, double par7)
	{
		this.posX = par1;
		this.posY = par3;
		this.posZ = par5;
		this.speed = par7;
		this.update = true;
	}

	public void onUpdateMoveHelper()
	{
		this.entity.setMoveForward(0.0F);

		if (this.update)
		{
			this.update = false;
			int i = MathHelper.floor_double(this.entity.boundingBox.minY + 0.5D);
			double d0 = this.posX - this.entity.posX;
			double d1 = this.posZ - this.entity.posZ;
			double d2 = this.posY - (double)i;
			double d3 = d0 * d0 + d2 * d2 + d1 * d1;

			if (d3 >= 2.500000277905201E-7D)
			{
				float f = (float)(Math.atan2(d1, d0) * 180.0D / Math.PI) - 90.0F;
				this.entity.rotationYaw = this.limitAngle(this.entity.rotationYaw, f, 30.0F);
				this.entity.setAIMoveSpeed((float)(this.speed * this.entity.getEntityAttribute(SharedMonsterAttributes.movementSpeed).getAttributeValue()));

				if (d2 > 0.0D && d0 * d0 + d1 * d1 < 1.0D)
				{
					this.entity.getJumpHelper().setJumping();
				}
			}
		}
	}

	private float limitAngle(float par1, float par2, float par3)
	{
		float f3 = MathHelper.wrapAngleTo180_float(par2 - par1);

		if (f3 > par3)
		{
			f3 = par3;
		}

		if (f3 < -par3)
		{
			f3 = -par3;
		}

		return par1 + f3;
	}
}