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.exploration.npc;

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

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

import fr.quatrevieux.araknemu.data.world.entity.environment.npc.Npc;

import fr.quatrevieux.araknemu.data.world.entity.environment.npc.NpcTemplate;

import fr.quatrevieux.araknemu.data.world.repository.environment.npc.NpcRepository;

import fr.quatrevieux.araknemu.data.world.repository.environment.npc.NpcTemplateRepository;

import fr.quatrevieux.araknemu.game.PreloadableService;

import fr.quatrevieux.araknemu.game.exploration.map.event.MapLoaded;

import fr.quatrevieux.araknemu.game.exploration.npc.dialog.DialogService;

import org.apache.logging.log4j.Logger;

import java.util.Collection;

import java.util.Optional;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.ConcurrentMap;

import java.util.stream.Collectors;

/**

 * Manage living NPCs

 */

public final class NpcService implements EventsSubscriber, PreloadableService {

    private final DialogService dialogService;

    private final NpcTemplateRepository templateRepository;

    private final NpcRepository npcRepository;

    private final Collection<ExchangeProvider> exchangeProviders;

    private final ConcurrentMap<Integer, GameNpc> npcByEntityId = new ConcurrentHashMap<>();

    public NpcService(DialogService dialogService, NpcTemplateRepository templateRepository, NpcRepository npcRepository, Collection<ExchangeProvider> exchangeProviders) {

        this.dialogService = dialogService;

        this.templateRepository = templateRepository;

        this.npcRepository = npcRepository;

        this.exchangeProviders = exchangeProviders;

    }

    @Override

    public void preload(Logger logger) {

        logger.info("Loading NPCs...");

        logger.info("{} NPC templates loaded", templateRepository.all().size());

        npcRepository.all().forEach(this::createByEntity);

        logger.info("{} NPCs loaded", npcByEntityId.size());

    }

    @Override

    public String name() {

        return "npc";

    }

    @Override

    public Listener[] listeners() {

        return new Listener[] {

            new Listener<MapLoaded>() {

                @Override

                public void on(MapLoaded event) {

                    npcRepository.byMapId(event.map().id()).stream()

                        .map(NpcService.this::createByEntity)

                        .forEach(npc -> npc.join(event.map()))

                    ;

                }

                @Override

                public Class<MapLoaded> event() {

                    return MapLoaded.class;

                }

            },

        };

    }

    /**

     * Get the NPC by the entity ID

     *

     * @param id The entity ID. /!\ Not same as sprite id

     */

    public GameNpc get(int id) {

        final GameNpc alreadyLoaded = npcByEntityId.get(id);

        if (alreadyLoaded != null) {

            return alreadyLoaded;

        }

        return createByEntity(npcRepository.get(id));

    }

    /**

     * Create the GameNpc from entity if not yet created

     *

     * @param entity The NPC entity to create

     */

}