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.player.experience;

import fr.quatrevieux.araknemu.core.event.Dispatcher;

import fr.quatrevieux.araknemu.core.event.EventsSubscriber;

import fr.quatrevieux.araknemu.core.event.Listener;

import fr.quatrevieux.araknemu.data.living.entity.player.Player;

import fr.quatrevieux.araknemu.data.world.entity.character.PlayerExperience;

import fr.quatrevieux.araknemu.data.world.repository.character.PlayerExperienceRepository;

import fr.quatrevieux.araknemu.game.GameConfiguration;

import fr.quatrevieux.araknemu.game.PreloadableService;

import fr.quatrevieux.araknemu.game.listener.player.RebuildLifePointsOnLevelUp;

import fr.quatrevieux.araknemu.game.listener.player.SendLevelUp;

import fr.quatrevieux.araknemu.game.listener.player.SendPlayerXp;

import fr.quatrevieux.araknemu.game.player.event.PlayerLoaded;

import org.apache.logging.log4j.Logger;

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

import java.util.ArrayList;

import java.util.List;

/**

 * Handle player experience and levels

 */

public final class PlayerExperienceService implements PreloadableService, EventsSubscriber {

    private final PlayerExperienceRepository repository;

    private final GameConfiguration.PlayerConfiguration configuration;

    private final List<PlayerExperience> levels = new ArrayList<>();

    public PlayerExperienceService(PlayerExperienceRepository repository, GameConfiguration.PlayerConfiguration configuration) {

        this.repository = repository;

        this.configuration = configuration;

    }

    @Override

    public String name() {

        return "player.experience";

    }

    @Override

    public Listener[] listeners() {

        return new Listener[] {

            new Listener<PlayerLoaded>() {

                @Override

                public void on(PlayerLoaded event) {

                    event.player().dispatcher().add(new RebuildLifePointsOnLevelUp(event.player())); // Issue #55 : Before send stats

                    event.player().dispatcher().add(new SendLevelUp(event.player()));

                    event.player().dispatcher().add(new SendPlayerXp(event.player()));

                }

                @Override

                public Class<PlayerLoaded> event() {

                    return PlayerLoaded.class;

                }

            },

        };

    }

    /**

     * Load player level

     *

     * @param dispatcher The event dispatcher

     * @param player Player to load

     */

    public GamePlayerExperience load(Dispatcher dispatcher, Player player) {

        return new GamePlayerExperience(player, this, dispatcher);

    }

    /**

     * Get the experience related to the level

     * If the level is higher than maximum level, the maximum level is returned

     *

     * @param level Level to get

     */

    PlayerExperience byLevel(int level) {

        return level <= levels.size()

            ? levels.get(level - 1)

            : levels.get(levels.size() - 1)

        ;

    }

    /**

     * Get the maximum player level

     */

    int maxLevel() {

        return levels.size();

    }

    /**

     * Apply the level up bonus

     *

     * @param entity The player entity

     * @param newLevel The reached level

     */

    void applyLevelUpBonus(Player entity, @Positive int newLevel) {

        final int diff = newLevel - entity.level();

        if (diff > 0) {

            entity.setSpellPoints(entity.spellPoints() + configuration.spellBoostPointsOnLevelUp() * diff);

            entity.setBoostPoints(entity.boostPoints() + configuration.characteristicPointsOnLevelUp() * diff);

        }

    }

}