/*
 *   This file is a part of the SteamWar software.
 *
 *   Copyright (C) 2024  SteamWar.de-Serverteam
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program 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 Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.bausystem.region;

import com.sk89q.worldedit.EditSession;
import de.steamwar.bausystem.region.flags.Flag;
import de.steamwar.sql.SchematicNode;
import lombok.NonNull;
import org.bukkit.Location;

import javax.annotation.Nullable;
import java.io.File;
import java.util.Optional;

public interface Region {

    static Region getRegion(Location location) {
        return RegionSystem.INSTANCE.get(location);
    }

    RegionType getType();

    <T extends Enum<T> & Flag.Value<T>> RegionFlagPolicy hasFlag(@NonNull Flag<T> flag);

    <T extends Enum<T> & Flag.Value<T>> boolean setFlag(@NonNull Flag<T> flag, T value);

    <T extends Enum<T> & Flag.Value<T>> Optional<T> getFlag(@NonNull Flag<T> flag);

    default <T extends Enum<T> & Flag.Value<T>> boolean isFlag(@NonNull Flag<T> flag, T value) {
        if (hasFlag(flag).isReadable()) {
            Optional<T> optional = getFlag(flag);
            return optional.isPresent() && optional.get() == value;
        }
        return false;
    }

    Point getMinPoint();

    Point getMaxPoint();

    boolean inRegion(Location location);

    Inner getBuildArea();

    Inner getTestblockArea();

    // TODO: Add forEachChunk and getChunkOutsidePredicate

    Optional<File> getGameModeConfig();

    boolean backup(boolean automatic);

    Optional<EditSession> copy();

    void reset();

    void remember(EditSession editSession);

    boolean undo();

    boolean redo();

    interface Inner {

        Inner EMPTY = new Inner() {
            private static final Point ZERO = new Point(0, 0, 0);

            @Override
            public Point getMinPoint(boolean extension) {
                return ZERO;
            }

            @Override
            public Point getMaxPoint(boolean extension) {
                return ZERO;
            }

            @Override
            public boolean inRegion(Location location, boolean extension) {
                return false;
            }

            @Override
            public Optional<EditSession> copy(boolean extension) {
                return Optional.empty();
            }

            @Override
            public void reset(@Nullable SchematicNode schematicNode, boolean extension) {
            }
        };

        default boolean isEmpty() {
            return this == EMPTY;
        }

        default boolean isPresent() {
            return this != EMPTY;
        }

        Point getMinPoint(boolean extension);

        Point getMaxPoint(boolean extension);

        boolean inRegion(Location location, boolean extension);

        Optional<EditSession> copy(boolean extension);

        void reset(@Nullable SchematicNode schematicNode, boolean extension);
    }
}