/*
 * 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.skills.Skill;
import com.l2jserver.gameserver.model.stats.Stats;
import com.l2jserver.gameserver.model.stats.functions.AbstractFunction;

/**
 * @author UnAfraid
 */
public class FuncAtkEvasion extends AbstractFunction {
	private static final FuncAtkEvasion _fae_instance = new FuncAtkEvasion();
	
	public static AbstractFunction getInstance() {
		return _fae_instance;
	}
	
	private FuncAtkEvasion() {
		super(Stats.EVASION_RATE, 1, null, 0, null);
	}
	
	@Override
	public double calc(L2Character effector, L2Character effected, Skill skill, double initVal) {
		final int level = effector.getLevel();
		double value = initVal;
		if (effector.isPlayer()) {
			// [Square(DEX)] * 6 + lvl;
			value += (Math.sqrt(effector.getDEX()) * 6) + level;
			double diff = level - 69;
			if (level >= 78) {
				diff *= 1.2;
			}
			if (level >= 70) {
				value += diff;
			}
		} else {
			// [Square(DEX)] * 6 + lvl;
			value += (Math.sqrt(effector.getDEX()) * 6) + level;
			if (level > 69) {
				value += (level - 69) + 2;
			}
		}
		return (int) value;
	}
}