package net.minecraft.entity.ai;

import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import java.util.List;
import net.minecraft.command.IEntitySelector;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityCreature;
import net.minecraft.pathfinding.PathEntity;
import net.minecraft.pathfinding.PathNavigate;
import net.minecraft.util.Vec3;

public class EntityAIAvoidEntity extends EntityAIBase
{
    public final Predicate canBeSeenSelector = new Predicate()
    {
        public boolean isApplicable(Entity entityIn)
        {
            return entityIn.isEntityAlive() && EntityAIAvoidEntity.this.theEntity.getEntitySenses().canSee(entityIn);
        }
        public boolean apply(Object p_apply_1_)
        {
            return this.isApplicable((Entity)p_apply_1_);
        }
    };

    /** The entity we are attached to */
    protected EntityCreature theEntity;
    private double farSpeed;
    private double nearSpeed;
    protected Entity closestLivingEntity;
    private float avoidDistance;

    /** The PathEntity of our entity */
    private PathEntity entityPathEntity;

    /** The PathNavigate of our entity */
    private PathNavigate entityPathNavigate;
    private Predicate avoidTargetSelector;

    public EntityAIAvoidEntity(EntityCreature creature, Predicate targetSelector, float searchDistance, double farSpeedIn, double nearSpeedIn)
    {
        this.theEntity = creature;
        this.avoidTargetSelector = targetSelector;
        this.avoidDistance = searchDistance;
        this.farSpeed = farSpeedIn;
        this.nearSpeed = nearSpeedIn;
        this.entityPathNavigate = creature.getNavigator();
        this.setMutexBits(1);
    }

    /**
     * Returns whether the EntityAIBase should begin execution.
     */
    public boolean shouldExecute()
    {
        List var1 = this.theEntity.worldObj.getEntitiesInAABBexcluding(this.theEntity, this.theEntity.getEntityBoundingBox().expand((double)this.avoidDistance, 3.0D, (double)this.avoidDistance), Predicates.and(new Predicate[] {IEntitySelector.NOT_SPECTATING, this.canBeSeenSelector, this.avoidTargetSelector}));

        if (var1.isEmpty())
        {
            return false;
        }
        else
        {
            this.closestLivingEntity = (Entity)var1.get(0);
            Vec3 var2 = RandomPositionGenerator.findRandomTargetBlockAwayFrom(this.theEntity, 16, 7, new Vec3(this.closestLivingEntity.posX, this.closestLivingEntity.posY, this.closestLivingEntity.posZ));

            if (var2 == null)
            {
                return false;
            }
            else if (this.closestLivingEntity.getDistanceSq(var2.xCoord, var2.yCoord, var2.zCoord) < this.closestLivingEntity.getDistanceSqToEntity(this.theEntity))
            {
                return false;
            }
            else
            {
                this.entityPathEntity = this.entityPathNavigate.getPathToXYZ(var2.xCoord, var2.yCoord, var2.zCoord);
                return this.entityPathEntity == null ? false : this.entityPathEntity.isDestinationSame(var2);
            }
        }
    }

    /**
     * Returns whether an in-progress EntityAIBase should continue executing
     */
    public boolean continueExecuting()
    {
        return !this.entityPathNavigate.noPath();
    }

    /**
     * Execute a one shot task or start executing a continuous task
     */
    public void startExecuting()
    {
        this.entityPathNavigate.setPath(this.entityPathEntity, this.farSpeed);
    }

    /**
     * Resets the task
     */
    public void resetTask()
    {
        this.closestLivingEntity = null;
    }

    /**
     * Updates the task
     */
    public void updateTask()
    {
        if (this.theEntity.getDistanceSqToEntity(this.closestLivingEntity) < 49.0D)
        {
            this.theEntity.getNavigator().setSpeed(this.nearSpeed);
        }
        else
        {
            this.theEntity.getNavigator().setSpeed(this.farSpeed);
        }
    }
}
