Arakne / Araknemu

 * This file is part of Araknemu.

 *

 * Araknemu is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Araknemu 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 Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.

 *

 * Copyright (c) 2017-2019 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.game.fight.castable.effect.handler.armor;

import fr.quatrevieux.araknemu.data.constant.Characteristic;

import fr.quatrevieux.araknemu.game.fight.castable.CastScope;

import fr.quatrevieux.araknemu.game.fight.castable.effect.Element;

import fr.quatrevieux.araknemu.game.fight.castable.effect.buff.Buff;

import fr.quatrevieux.araknemu.game.fight.castable.effect.buff.BuffHook;

import fr.quatrevieux.araknemu.game.fight.castable.effect.handler.EffectHandler;

import fr.quatrevieux.araknemu.game.fight.castable.effect.handler.damage.Damage;

import fr.quatrevieux.araknemu.game.fight.fighter.ActiveFighter;

import fr.quatrevieux.araknemu.game.fight.fighter.PassiveFighter;

import fr.quatrevieux.araknemu.game.world.creature.characteristics.Characteristics;

/**

 * Handle reducing damages

 */

public final class ReduceDamageHandler implements EffectHandler, BuffHook {

    @Override

    public void handle(CastScope cast, CastScope.EffectScope effect) {

        throw new UnsupportedOperationException("ReduceDamageHandler can only be used as buff");

    }

    }

    @Override

    public void onDirectDamage(Buff buff, ActiveFighter caster, Damage value) {

        if (!supportsElement(buff, value.element())) {

            return;

        }

        final Characteristics characteristics = buff.target().characteristics();

        final int boost = 200 + characteristics.get(Characteristic.INTELLIGENCE) + characteristics.get(value.element().boost());

        final int reduce = buff.effect().min() * boost / 200;

        if (reduce < 0) {

            return;

        }

        value.reduce(reduce);

    }

    /**

     * Check if the armor supports the damage element

     *

     * @param buff The buff

     * @param element The damage element

     *

     * @return true if the armor supports the element

     */

    private boolean supportsElement(Buff buff, Element element) {

        return buff.effect().special() == 0 || Element.fromBitSet(buff.effect().special()).contains(element);

    }

}