/**
 * 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.skillengine.effect;

import java.util.concurrent.Future;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;

import com.aionemu.gameserver.ai2.event.AIEventType;
import com.aionemu.gameserver.controllers.observer.ActionObserver;
import com.aionemu.gameserver.controllers.observer.ObserverType;
import com.aionemu.gameserver.model.TaskId;
import com.aionemu.gameserver.model.gameobjects.Creature;
import com.aionemu.gameserver.model.gameobjects.Homing;
import com.aionemu.gameserver.model.templates.spawns.SpawnTemplate;
import com.aionemu.gameserver.skillengine.SkillEngine;
import com.aionemu.gameserver.skillengine.model.Effect;
import com.aionemu.gameserver.spawnengine.SpawnEngine;
import com.aionemu.gameserver.spawnengine.VisibleObjectSpawner;
import com.aionemu.gameserver.utils.ThreadPoolManager;

/**
 * @author ATracer
 * @modified Kill3r
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SummonHomingEffect")
public class SummonHomingEffect extends SummonEffect {

    @XmlAttribute(name = "npc_count", required = true)
    protected int npcCount;
    @XmlAttribute(name = "attack_count", required = true)
    protected int attackCount;
    @XmlAttribute(name = "skill_id", required = false)
    protected int skillId;

    @Override
    public void applyEffect(Effect effect) {
        final Creature effected = effect.getEffected();
        final Creature effector = effect.getEffector();
        float x = effector.getX();
        float y = effector.getY();
        float z = effector.getZ();
        byte heading = effector.getHeading();
        int worldId = effector.getWorldId();
        int instanceId = effector.getInstanceId();

        for (int i = 0; i < npcCount; i++) {
            SpawnTemplate spawn = SpawnEngine.addNewSingleTimeSpawn(worldId, npcId, x, y, z, heading);
            final Homing homing = VisibleObjectSpawner.spawnHoming(spawn, instanceId, effector, attackCount,
                    effect.getSkillId(), effect.getSkillLevel(), skillId);

            if (attackCount > 0) {
                ActionObserver observer = new ActionObserver(ObserverType.ATTACK) {
                    @Override
                    public void attack(Creature creature) {
                        homing.setAttackCount(homing.getAttackCount() - 1);
                        if(skillId != 0){
                            SkillEngine.getInstance().applyEffectDirectly(skillId, effector, effected, 0);
                        }
                        if (homing.getAttackCount() <= 0) {
                            homing.getController().onDelete();
                        }
                    }
                };

                homing.getObserveController().addObserver(observer);
                effect.setActionObserver(observer, position);
            }
            // Schedule a despawn just in case
            Future<?> task = ThreadPoolManager.getInstance().schedule(new Runnable() {
                @Override
                public void run() {
                    if ((homing != null) && (homing.isSpawned())) {
                        homing.getController().onDelete();
                    }
                }
            }, 15 * 1000);
            homing.getController().addTask(TaskId.DESPAWN, task);
            homing.getAi2().onCreatureEvent(AIEventType.ATTACK, effect.getEffected());
        }
    }
}
