content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  Aion-Lightning is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details. *
   *  You should have received a copy of the GNU General Public License
   *  along with Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  package com.aionemu.gameserver.ai2.handler;
  
  import com.aionemu.gameserver.ai2.AIState;
  import com.aionemu.gameserver.ai2.AbstractAI;
  import com.aionemu.gameserver.ai2.NpcAI2;
  import com.aionemu.gameserver.ai2.event.AIEventType;
  import com.aionemu.gameserver.ai2.manager.EmoteManager;
  import com.aionemu.gameserver.model.gameobjects.Creature;
  import com.aionemu.gameserver.model.gameobjects.VisibleObject;
  import com.aionemu.gameserver.utils.MathUtil;
  
  /**
   * @author ATracer
   */
  public class FollowEventHandler {
  
  	/**
  	 * @param npcAI
  	 * @param creature
  	 */
  	public static void follow(NpcAI2 npcAI, Creature creature) {
  		if (npcAI.setStateIfNot(AIState.FOLLOWING)) {
  			npcAI.getOwner().setTarget(creature);
  			EmoteManager.emoteStartFollowing(npcAI.getOwner());
  		}
  	}
  
  	/**
  	 * @param npcAI
  	 * @param creature
  	 */
  	public static void creatureMoved(NpcAI2 npcAI, Creature creature) {
  		if (npcAI.isInState(AIState.FOLLOWING)) {
  			if (npcAI.getOwner().isTargeting(creature.getObjectId()) && !creature.getLifeStats().isAlreadyDead()) {
  				checkFollowTarget(npcAI, creature);
  			}
  		}
  	}
  
  	/**
  	 * @param creature
  	 */
  	public static void checkFollowTarget(NpcAI2 npcAI, Creature creature) {
  		if (!isInRange(npcAI, creature)) {
  			npcAI.onGeneralEvent(AIEventType.TARGET_TOOFAR);
  		}
  	}
  
  	public static boolean isInRange(AbstractAI ai, VisibleObject object) {
  		if (object == null) {
  			return false;
  		}
  		if (object.isInInstance()) {
  			return MathUtil.isIn3dRange(ai.getOwner(), object, 9999);
  		}
  		else if (ai.getOwner().getLifeStats().getHpPercentage() < 100) {
  			return MathUtil.isIn3dRange(ai.getOwner(), object, 30);
  		}
  		else {
  			return MathUtil.isIn3dRange(ai.getOwner(), object, 15);
  		}
  	}
  
  	/**
  	 * @param npcAI
  	 * @param creature
  	 */
  	public static void stopFollow(NpcAI2 npcAI, Creature creature) {
  		if (npcAI.setStateIfNot(AIState.IDLE)) {
  			npcAI.getOwner().setTarget(null);
  			npcAI.getOwner().getMoveController().abortMove();
  			npcAI.getOwner().getController().scheduleRespawn();
  			npcAI.getOwner().getController().onDelete();
  		}
  	}
  }
  