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.monster.environment;

import fr.quatrevieux.araknemu.data.world.entity.monster.MonsterGroupData;

import fr.quatrevieux.araknemu.data.world.entity.monster.MonsterGroupPosition;

import fr.quatrevieux.araknemu.game.exploration.ExplorationPlayer;

import fr.quatrevieux.araknemu.game.exploration.map.ExplorationMap;

import fr.quatrevieux.araknemu.game.exploration.map.cell.ExplorationMapCell;

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

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

import fr.quatrevieux.araknemu.game.fight.builder.PvmBuilder;

import fr.quatrevieux.araknemu.game.monster.group.MonsterGroup;

import fr.quatrevieux.araknemu.game.monster.group.MonsterGroupFactory;

import java.util.Collections;

import java.util.List;

import java.util.stream.Collectors;

import java.util.stream.Stream;

/**

 * Handle a monster group configuration on map and cell

 */

public final class LivingMonsterGroupPosition {

    private final MonsterGroupFactory factory;

    private final FightService fightService;

    private final MonsterEnvironmentService environmentService;

    private final boolean fixed;

    private final MonsterGroupData data;

    private final SpawnCellSelector cellSelector;

    private ExplorationMap map;

    public LivingMonsterGroupPosition(MonsterGroupFactory factory, MonsterEnvironmentService environmentService, FightService fightService, MonsterGroupData data, SpawnCellSelector cellSelector, boolean fixed) {

        this.factory = factory;

        this.fightService = fightService;

        this.environmentService = environmentService;

        this.data = data;

        this.cellSelector = cellSelector;

        this.fixed = fixed;

    }

    /**

     * Link the group to the map and populate (spawn) with configured group data

     * This method should be called once, when exploration map is loaded

     *

     * @see fr.quatrevieux.araknemu.game.exploration.map.event.MapLoaded

     */

    public void populate(ExplorationMap map) {

        this.map = map;

        this.cellSelector.setMap(map);

        for (long i = groupStream().count(); i < data.maxCount(); ++i) {

            spawn();

        }

    }

    /**

     * Spawn a new group on the map

     *

     * Note: this method will not check the max count of monsters : if called manually, the group count can exceed max count

     */

    /**

     * Respawn a group on the map

     *

     * Unlike {@link LivingMonsterGroupPosition#spawn()} the maximum number of groups is checked,

     * and this method will do nothing if the map is already full

     */

    public void respawn() {

        if (groupStream().count() < data.maxCount()) {

            map.add(factory.create(data, this));

        }

    }

    /**

     * Get list of available monster groups on the map

     */

    public List<MonsterGroup> available() {

        if (map == null) {

            return Collections.emptyList();

        }

        return groupStream().collect(Collectors.toList());

    }

    /**

     * Find the group spawn cell

     *

     * If the cell is fixed (not -1 on {@link MonsterGroupPosition#position() cell}), this cell is returned

     * If not, a random free (without creatures, objects, and walkable) cell is returned

     *

     * @see fr.quatrevieux.araknemu.game.exploration.map.cell.ExplorationMapCell#free()

     * @see SpawnCellSelector#cell()

     */

    public ExplorationMapCell cell() {

        return cellSelector.cell();

    }

    /**

     * Does the current monster group is fixed ?

     * If true, the group cannot move

     */

    public boolean fixed() {

        return fixed;

    }

    /**

     * Start a fight with the group

     *

     * @param group The monster group. Must be handled by the current instance

     * @param player The player

     *

     * @return The created fight

     */

    public Fight startFight(MonsterGroup group, ExplorationPlayer player) {

        map.remove(group);

        environmentService.respawn(this, data.respawnTime());

        return fightService.handler(PvmBuilder.class).start(

            builder -> builder

                .randomize(!data.fixedTeamNumber())

                .map(map)

                .initiator(player.player())

                .monsterGroup(group)

        );

    }

    /**

     * Get stream of groups related to the current group position

     */

    private Stream<MonsterGroup> groupStream() {

        return map.creatures().stream()

            .filter(MonsterGroup.class::isInstance)

            .map(creature -> (MonsterGroup) creature)

            .filter(group -> this.equals(group.handler()))

        ;

    }

}