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.fighter.player;

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

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

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

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

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

import fr.quatrevieux.araknemu.game.world.creature.Life;

import org.checkerframework.checker.index.qual.NonNegative;

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

/**

 * Handle life points for {@link PlayerFighter}

 *

 * The life points will be saved when fight started

 */

public final class PlayerFighterLife implements FighterLife {

    private final Life baseLife;

    private final Fighter fighter;

    private @MonotonicNonNull BaseFighterLife delegate;

    public PlayerFighterLife(Life baseLife, Fighter fighter) {

        this.baseLife = baseLife;

        this.fighter = fighter;

    }

    @Override

    public @NonNegative int current() {

        return delegate != null ? delegate.current() : baseLife.current();

    }

    @Override

    public @NonNegative int max() {

        return delegate != null ? delegate.max() : baseLife.max();

    }

    @Override

    public boolean dead() {

        return delegate != null && delegate.dead();

    }

    @Override

    public void alterMax(PassiveFighter caster, int value) {

        if (delegate == null) {

            throw new IllegalStateException("PlayerFighterLife must be initialized");

        }

        delegate.alterMax(caster, value);

    }

    @Override

    public void kill(ActiveFighter caster) {

        if (delegate == null) {

            throw new IllegalStateException("PlayerFighterLife must be initialized");

        }

        delegate.kill(caster);

    }

    /**

     * Initialise the fighter life when fight is started

     */

    public void init() {

        if (delegate != null) {

            throw new IllegalStateException("Player fighter life is already initialised");

        }

        delegate = new BaseFighterLife(fighter, baseLife.current(), baseLife.max());

    }

}