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.characteristic;

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

import fr.quatrevieux.araknemu.game.fight.Fight;

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

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

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

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

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.ActiveFighter;

import fr.quatrevieux.araknemu.game.spell.effect.SpellEffect;

import fr.quatrevieux.araknemu.network.game.out.fight.action.ActionEffect;

/**

 * Alter vitality with buff effect

 * The effect will be added to current and max fighter life

 *

 * @see fr.quatrevieux.araknemu.game.fight.fighter.FighterLife#alterMax(fr.quatrevieux.araknemu.game.fight.fighter.PassiveFighter, int)

 */

public final class AlterVitalityHandler implements EffectHandler, BuffHook {

    private final Fight fight;

    private final int multiplier;

    private final boolean canBeDispelled;

    /**

     * @param fight Active fight

     * @param multiplier 1 for add vitality, -1 for remove

     * @param canBeDispelled Added buff effect can be dispelled. See: {@link Buff#canBeDispelled()}

     */

    @Override

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

        throw new UnsupportedOperationException("Alter characteristic effect must be used as a buff");

    }

    @Override

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

        final SpellEffect spellEffect = effect.effect();

        final ActiveFighter caster = cast.caster();

        EffectValue.forEachTargets(

            spellEffect,

            caster,

            effect.targets(),

            (target, effectValue) -> target.buffs().add(new Buff(

                BuffEffect.fixed(spellEffect, effectValue.value()),

                cast.action(),

                caster,

                target,

                this,

                canBeDispelled

            ))

        );

    }

    @Override

    public void onBuffStarted(Buff buff) {

        final int value = buff.effect().min() * multiplier;

        buff.target().characteristics().alter(Characteristic.VITALITY, value);

        fight.send(ActionEffect.buff(buff, buff.effect().min()));

        buff.target().life().alterMax(buff.caster(), value);

    }

    @Override

    public void onBuffTerminated(Buff buff) {

        final int value = -buff.effect().min() * multiplier;

        buff.target().characteristics().alter(Characteristic.VITALITY, value);

        buff.target().life().alterMax(buff.caster(), value);

    }

    /**

     * Create a dispellable add vitality effect

     */

    public static AlterVitalityHandler add(Fight fight) {

        return new AlterVitalityHandler(fight, 1, true);

    }

    /**

     * Create a not dispellable add vitality effect

     */

    public static AlterVitalityHandler addNotDispellable(Fight fight) {

        return new AlterVitalityHandler(fight, 1, true);

    }

    /**

     * Create a dispellable remove vitality effect

     */

    public static AlterVitalityHandler remove(Fight fight) {

        return new AlterVitalityHandler(fight, -1, true);

    }

}