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) 2017-2022 Vincent Quatrevieux

 */

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

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

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.fighter.Fighter;

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

import fr.quatrevieux.araknemu.game.spell.boost.SpellsBoosts;

/**

 * Add a spell boost to a fighter

 * The boost is applied on buff start, and removed on buff termination

 *

 * Parameters:

 * - The first effect parameter (i.e. min) is the spell id

 * - The third effect parameter (i.e. special) is the boost value

 *

 * Note: There is no game action packet related to this effect

 *

 * @see fr.quatrevieux.araknemu.game.fight.fighter.FighterSpellList#boost(int, SpellsBoosts.Modifier, int)

 * @see BuffHook#onBuffStarted(Buff) Hook used for apply the boost

 * @see BuffHook#onBuffTerminated(Buff) Hook used for removed the boost

 */

public final class BoostSpellHandler implements EffectHandler, BuffHook {

    private final SpellsBoosts.Modifier modifier;

    /**

     * @param modifier Spell modifier to apply

     */

    @Override

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

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

    }

    @Override

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

        for (PassiveFighter target : effect.targets()) {

            target.buffs().add(new Buff(effect.effect(), cast.action(), cast.caster(), target, this));

        }

    }

    @Override

    public void onBuffStarted(Buff buff) {

        final PassiveFighter target = buff.target();

        if (!(target instanceof Fighter)) {

            return;

        }

        final Fighter fighter = (Fighter) target;

        fighter.spells().boost(buff.effect().min(), modifier, buff.effect().special());

    }

    @Override

    public void onBuffTerminated(Buff buff) {

        final PassiveFighter target = buff.target();

        if (!(target instanceof Fighter)) {

            return;

        }

        final Fighter fighter = (Fighter) target;

        fighter.spells().boost(buff.effect().min(), modifier, -buff.effect().special());

    }

}