/*
 * Copyright (C) 2004-2016 L2J DataPack
 *
 * This file is part of L2J DataPack.
 *
 * L2J DataPack 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.
 *
 * L2J DataPack 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */
package ai.npc.NpcBuffers;

import com.l2jserver.gameserver.ThreadPoolManager;
import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.gameserver.model.actor.L2Npc;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.model.actor.instance.L2TamedBeastInstance;
import com.l2jserver.gameserver.model.skills.Skill;
import com.l2jserver.gameserver.model.zone.ZoneId;
import com.l2jserver.gameserver.util.Util;

/**
 * @author UnAfraid
 */
public class NpcBufferAI implements Runnable
{
    private final L2Npc _npc;
    private final NpcBufferSkillData _skillData;

    protected NpcBufferAI(L2Npc npc, NpcBufferSkillData skill)
    {
        _npc = npc;
        _skillData = skill;
    }

    @Override
    public void run()
    {
        if ((_npc == null) || !_npc.isVisible() || _npc.isDecayed() || _npc.isDead() || (_skillData == null) || (_skillData.getSkill() == null))
        {
            return;
        }

        if ((_npc.getSummoner() == null) || !_npc.getSummoner().isPlayer())
        {
            return;
        }

        final Skill skill = _skillData.getSkill();
        final L2PcInstance player = _npc.getSummoner().getActingPlayer();

        switch (_skillData.getAffectScope())
        {
            case PARTY:
            {
                if (player.isInParty())
                {
                    for (L2PcInstance member : player.getParty().getMembers())
                    {
                        if (Util.checkIfInRange(skill.getAffectRange(), _npc, member, true) && !member.isDead())
                        {
                            skill.applyEffects(player, member);
                        }
                    }
                }
                else
                {
                    if (Util.checkIfInRange(skill.getAffectRange(), _npc, player, true) && !player.isDead())
                    {
                        skill.applyEffects(player, player);
                    }
                }
                break;
            }
            case RANGE:
            {
                for (L2Character target : _npc.getKnownList().getKnownCharactersInRadius(skill.getAffectRange()))
                {
                    switch (_skillData.getAffectObject())
                    {
                        case FRIEND:
                        {
                            if (isFriendly(player, target) && !target.isDead())
                            {
                                skill.applyEffects(target, target);
                            }
                            break;
                        }
                        case NOT_FRIEND:
                        {
                            if (isEnemy(player, target) && !target.isDead())
                            {
                                // Update PvP status
                                if (target.isPlayable())
                                {
                                    player.updatePvPStatus(target);
                                }
                                skill.applyEffects(target, target);
                            }
                            break;
                        }
                    }
                }
                break;
            }
        }
        ThreadPoolManager.getInstance().scheduleGeneral(this, _skillData.getDelay());
    }

    /**
     * Verifies if the character is an friend and can be affected by positive effect.
     * @param player the player
     * @param target the target
     * @return {@code true} if target can be affected by positive effect, {@code false} otherwise
     */
    private boolean isFriendly(L2PcInstance player, L2Character target)
    {
        if (target.isPlayable())
        {
            final L2PcInstance targetPlayer = target.getActingPlayer();

            if (player == targetPlayer)
            {
                return true;
            }

            if (player.isInPartyWith(targetPlayer))
            {
                return true;
            }

            if (player.isInCommandChannelWith(targetPlayer))
            {
                return true;
            }

            if (player.isInClanWith(targetPlayer))
            {
                return true;
            }

            if (player.isInAllyWith(targetPlayer))
            {
                return true;
            }

            if (player.isOnSameSiegeSideWith(targetPlayer))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * Verifies if the character is an enemy and can be affected by negative effect.
     * @param player the player
     * @param target the target
     * @return {@code true} if target can be affected by negative effect, {@code false} otherwise
     */
    private boolean isEnemy(L2PcInstance player, L2Character target)
    {
        if (isFriendly(player, target))
        {
            return false;
        }

        if (target instanceof L2TamedBeastInstance)
        {
            return isEnemy(player, ((L2TamedBeastInstance) target).getOwner());
        }

        if (target.isMonster())
        {
            return true;
        }

        if (target.isPlayable())
        {
            final L2PcInstance targetPlayer = target.getActingPlayer();

            if (!isFriendly(player, targetPlayer))
            {
                if (targetPlayer.getPvpFlag() != 0)
                {
                    return true;
                }

                if (targetPlayer.getKarma() != 0)
                {
                    return true;
                }

                if (player.isAtWarWith(targetPlayer))
                {
                    return true;
                }

                if (targetPlayer.isInsideZone(ZoneId.PVP))
                {
                    return true;
                }
            }
        }
        return false;
    }
}