/*
 * Copyright © 2004-2021 L2J Server
 * 
 * This file is part of L2J Server.
 * 
 * L2J Server 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 Server 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 com.l2jserver.gameserver.model.stats.functions.formulas;

import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.model.itemcontainer.Inventory;
import com.l2jserver.gameserver.model.items.L2Item;
import com.l2jserver.gameserver.model.skills.Skill;
import com.l2jserver.gameserver.model.stats.Stats;
import com.l2jserver.gameserver.model.stats.functions.AbstractFunction;

/**
 * @author UnAfraid
 */
public class FuncPDefMod extends AbstractFunction {
	private static final FuncPDefMod _fmm_instance = new FuncPDefMod();
	
	public static AbstractFunction getInstance() {
		return _fmm_instance;
	}
	
	private FuncPDefMod() {
		super(Stats.POWER_DEFENCE, 1, null, 0, null);
	}
	
	@Override
	public double calc(L2Character effector, L2Character effected, Skill skill, double initVal) {
		double value = initVal;
		if (effector.isPlayer()) {
			final L2PcInstance p = effector.getActingPlayer();
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_CHEST)) {
				value -= p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_CHEST) : p.getTemplate().getBaseDefBySlot(Inventory.PAPERDOLL_CHEST);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_LEGS) || (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_CHEST) && (p.getInventory().getPaperdollItem(Inventory.PAPERDOLL_CHEST).getItem().getBodyPart() == L2Item.SLOT_FULL_ARMOR))) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_LEGS) : Inventory.PAPERDOLL_LEGS);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_HEAD)) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_HEAD) : Inventory.PAPERDOLL_HEAD);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_FEET)) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_FEET) : Inventory.PAPERDOLL_FEET);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_GLOVES)) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_GLOVES) : Inventory.PAPERDOLL_GLOVES);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_UNDER)) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_UNDER) : Inventory.PAPERDOLL_UNDER);
			}
			if (!p.getInventory().isPaperdollSlotEmpty(Inventory.PAPERDOLL_CLOAK)) {
				value -= p.getTemplate().getBaseDefBySlot(p.isTransformed() ? p.getTransformation().getBaseDefBySlot(p, Inventory.PAPERDOLL_CLOAK) : Inventory.PAPERDOLL_CLOAK);
			}
		}
		return value * effector.getLevelMod();
	}
}