content: /*
      This file is part of the OdinMS Maple Story Server
      Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
                 Matthias Butz <matze@odinms.de>
                 Jan Christian Meyer <vimes@odinms.de>
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU Affero General Public License as
      published by the Free Software Foundation version 3 as published by
      the Free Software Foundation. You may not use, modify or distribute
      this program under any other version of the GNU Affero General Public
      License.
  
      This program 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 Affero General Public License for more details.
  
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  package net.server.channel.handlers;
  
  import client.MapleCharacter;
  import client.MapleClient;
  import java.awt.Point;
  import java.util.LinkedList;
  import java.util.List;
  
  import config.YamlConfig;
  import server.life.MapleMonster;
  import server.life.MapleMonsterInformationProvider;
  //import server.life.MobAttackInfo;
  //import server.life.MobAttackInfoFactory;
  import server.life.MobSkill;
  import server.life.MobSkillFactory;
  import server.maps.MapleMap;
  import server.maps.MapleMapObject;
  import server.maps.MapleMapObjectType;
  import tools.MaplePacketCreator;
  import tools.Pair;
  import tools.Randomizer;
  import tools.data.input.SeekableLittleEndianAccessor;
  import tools.exceptions.EmptyMovementException;
  
  /**
   * @author Danny (Leifde)
   * @author ExtremeDevilz
   * @author Ronan (HeavenMS)
   */
  public final class MoveLifeHandler extends AbstractMovementPacketHandler {
          
  	@Override
  	public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
                  MapleCharacter player = c.getPlayer();
                  MapleMap map = player.getMap();
                  
                  if (player.isChangingMaps()) {  // thanks Lame for noticing mob movement shuffle (mob OID on different maps) happening on map transitions
                      return;
                  }
                  
  		int objectid = slea.readInt();
  		short moveid = slea.readShort();
  		MapleMapObject mmo = map.getMapObject(objectid);
  		if (mmo == null || mmo.getType() != MapleMapObjectType.MONSTER) {
  			return;
  		}
                  
  		MapleMonster monster = (MapleMonster) mmo;
                  List<MapleCharacter> banishPlayers = null;
                  
                  byte pNibbles = slea.readByte();
  		byte rawActivity = slea.readByte();
  		int skillId = slea.readByte() & 0xff;
  		int skillLv = slea.readByte() & 0xff;
  		short pOption = slea.readShort();
                  slea.skip(8);
                  
                  if (rawActivity >= 0) {
  			rawActivity = (byte) (rawActivity & 0xFF >> 1);
  		}
  
  		boolean isAttack = inRangeInclusive(rawActivity, 24, 41);
  		boolean isSkill = inRangeInclusive(rawActivity, 42, 59);
                  
  		MobSkill toUse = null;
                  int useSkillId = 0, useSkillLevel = 0;
                  
                  MobSkill nextUse = null;
                  int nextSkillId = 0, nextSkillLevel = 0;
                  
                  boolean nextMovementCouldBeSkill = !(isSkill || (pNibbles != 0));
                  
                  int castPos;
                  if (isSkill) {
                          useSkillId = skillId;
                          useSkillLevel = skillLv;
                          
                          castPos = monster.getSkillPos(useSkillId, useSkillLevel);
                          if (castPos != -1) {
                                  toUse = MobSkillFactory.getMobSkill(useSkillId, useSkillLevel);
                                  
                                  if (monster.canUseSkill(toUse, true)) {
                                          int animationTime = MapleMonsterInformationProvider.getInstance().getMobSkillAnimationTime(toUse);
                                          if(animationTime > 0 && toUse.getSkillId() != 129) {
                                                  toUse.applyDelayedEffect(player, monster, true, animationTime);
                                          } else {
                                                  banishPlayers = new LinkedList<>();
                                                  toUse.applyEffect(player, monster, true, banishPlayers);
                                          }
                                  }
                          }
                  } else {
                          castPos = (rawActivity - 24) / 2;
                          
                          int atkStatus = monster.canUseAttack(castPos, isSkill);
                          if (atkStatus < 1) {
                                  rawActivity = -1;
                                  pOption = 0;
                          }
                  }
                  
                  int mobMp = monster.getMp();
                  if (nextMovementCouldBeSkill) {
                          int noSkills = monster.getNoSkills();
                          if (noSkills > 0) {
                                  int rndSkill = Randomizer.nextInt(noSkills);
                                  
                                  Pair<Integer, Integer> skillToUse = monster.getSkills().get(rndSkill);
                                  nextSkillId = skillToUse.getLeft();
                                  nextSkillLevel = skillToUse.getRight();
                                  nextUse = MobSkillFactory.getMobSkill(nextSkillId, nextSkillLevel);
                                  
                                  if (!(nextUse != null && monster.canUseSkill(nextUse, false) && nextUse.getHP() >= (int) (((float) monster.getHp() / monster.getMaxHp()) * 100) && mobMp >= nextUse.getMpCon())) {
                                          // thanks OishiiKawaiiDesu for noticing mobs trying to cast skills they are not supposed to be able
                                          
                                          nextSkillId = 0;
                                          nextSkillLevel = 0;
                                          nextUse = null;
                                  }
                          }
                  }
                  
  		slea.readByte();
  		slea.readInt(); // whatever
  		short start_x = slea.readShort(); // hmm.. startpos?
  		short start_y = slea.readShort(); // hmm...
  		Point startPos = new Point(start_x, start_y - 2);
  		Point serverStartPos = new Point(monster.getPosition());
                  
                  Boolean aggro = monster.aggroMoveLifeUpdate(player);
                  if (aggro == null) return;
  
                  if (nextUse != null) {
                          c.announce(MaplePacketCreator.moveMonsterResponse(objectid, moveid, mobMp, aggro, nextSkillId, nextSkillLevel));
  		} else {
  			c.announce(MaplePacketCreator.moveMonsterResponse(objectid, moveid, mobMp, aggro));
  		}
                  
                  
                  try {
                          long movementDataStart = slea.getPosition();
                          updatePosition(slea, monster, -2);  // Thanks Doodle & ZERO傑洛 for noticing sponge-based bosses moving out of stage in case of no-offset applied
                          long movementDataLength = slea.getPosition() - movementDataStart; //how many bytes were read by updatePosition
                          slea.seek(movementDataStart);
                          
                          if (YamlConfig.config.server.USE_DEBUG_SHOW_RCVD_MVLIFE) {
                                  System.out.println((isSkill ? "SKILL " : (isAttack ? "ATTCK " : " ")) + "castPos: " + castPos + " rawAct: " + rawActivity + " opt: " + pOption + " skillID: " + useSkillId + " skillLV: " + useSkillLevel + " " + "allowSkill: " + nextMovementCouldBeSkill + " mobMp: " + mobMp);
                          }
                          
                          map.broadcastMessage(player, MaplePacketCreator.moveMonster(objectid, nextMovementCouldBeSkill, rawActivity, useSkillId, useSkillLevel, pOption, startPos, slea, movementDataLength), serverStartPos);
                          //updatePosition(res, monster, -2); //does this need to be done after the packet is broadcast?
                          map.moveMonster(monster, monster.getPosition());
                  } catch (EmptyMovementException e) {}
                  
                  if (banishPlayers != null) {
                          for (MapleCharacter chr : banishPlayers) {
                                 chr.changeMapBanish(monster.getBanish().getMap(), monster.getBanish().getPortal(), monster.getBanish().getMsg());
                          }
                  }
  	}
  
  	private static boolean inRangeInclusive(Byte pVal, Integer pMin, Integer pMax) {
  		return !(pVal < pMin) || (pVal > pMax);
  	}
  }