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) 2017-2020 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.game.fight.castable.validator;

import fr.arakne.utils.value.Interval;

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

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

import fr.quatrevieux.araknemu.game.fight.map.BattlefieldCell;

import fr.quatrevieux.araknemu.game.fight.turn.Turn;

import fr.quatrevieux.araknemu.network.game.out.info.Error;

import org.checkerframework.checker.nullness.qual.Nullable;

/**

 * Validate the cast range

 */

public final class RangeValidator implements CastConstraintValidator {

    @Override

    public @Nullable Error validate(Turn turn, Castable castable, BattlefieldCell target) {

        final int distance = turn.fighter().cell().coordinate().distance(target);

        Interval range = castable.constraints().range();

        if (castable.modifiableRange()) {

            range = range.modify(turn.fighter().characteristics().get(Characteristic.SIGHT_BOOST));

        }

        if (!range.contains(distance)) {

            return Error.cantCastBadRange(range, distance);

        }

        return null;

    }

}