/***********************************************************************************
 * Copyright (c) 2024 /// Project SWG /// www.projectswg.com                       *
 *                                                                                 *
 * ProjectSWG is the first NGE emulator for Star Wars Galaxies founded on          *
 * July 7th, 2011 after SOE announced the official shutdown of Star Wars Galaxies. *
 * Our goal is to create an emulator which will provide a server for players to    *
 * continue playing a game similar to the one they used to play. We are basing     *
 * it on the final publish of the game prior to end-game events.                   *
 *                                                                                 *
 * This file is part of Holocore.                                                  *
 *                                                                                 *
 * --------------------------------------------------------------------------------*
 *                                                                                 *
 * Holocore 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.                                 *
 *                                                                                 *
 * Holocore 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 Holocore.  If not, see <http://www.gnu.org/licenses/>.               *
 ***********************************************************************************/

package com.projectswg.holocore.resources.support.objects.permissions;

import com.projectswg.common.data.encodables.mongo.MongoData;
import com.projectswg.holocore.resources.support.objects.swg.SWGObject;
import com.projectswg.holocore.resources.support.objects.swg.cell.CellObject;
import com.projectswg.holocore.resources.support.objects.swg.creature.CreatureObject;
import org.jetbrains.annotations.NotNull;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;

public final class ReadWritePermissions implements ContainerPermissions {
	
	private static final ReadWritePermissions PERMISSIONS = new ReadWritePermissions();
	
	private final Set<Long> allowed;
	
	private boolean locked;
	
	private ReadWritePermissions() {
		this.allowed = new HashSet<>();
		this.locked = true;
	}
	
	private ReadWritePermissions(Set<SWGObject> allowed) {
		this.allowed = allowed.stream().map(SWGObject::getObjectId).collect(Collectors.toSet());
		this.locked = true;
	}
	
	private ReadWritePermissions(MongoData data) {
		this.allowed = new HashSet<>();
		this.locked = false;
		readMongo(data);
		this.locked = true;
	}
	
	@NotNull
	@Override
	public ContainerPermissionType getType() {
		return ContainerPermissionType.READ_WRITE;
	}
	
	@Override
	public boolean canView(@NotNull CreatureObject requester, @NotNull SWGObject container) {
		return allowed.contains(requester.getObjectId());
	}
	
	@Override
	public boolean canEnter(@NotNull CreatureObject requester, @NotNull SWGObject container) {
		return container instanceof CellObject && allowed.contains(requester.getObjectId());
	}
	
	@Override
	public boolean canMove(@NotNull CreatureObject requester, @NotNull SWGObject container) {
		return allowed.contains(requester.getObjectId());
	}
	
	@Override
	public void readMongo(@NotNull MongoData data) {
		if (locked)
			throw new IllegalStateException("Permissions is already locked");
		allowed.addAll(data.getArray("allowed", Long.class));
	}
	
	@Override
	public void saveMongo(MongoData data) {
		data.putArray("allowed", new ArrayList<>(allowed));
	}
	
	/**
	 * Creates a permission type where only the objects specified are allowed to view/enter/move requested objects into/out of the requested container
	 * @param allowed the objects allowed to view/enter/move
	 * @return a read/write permissions object
	 */
	public static ReadWritePermissions from(Collection<? extends SWGObject> allowed) {
		if (allowed.isEmpty())
			return PERMISSIONS;
		return new ReadWritePermissions(new HashSet<>(allowed));
	}
	
	/**
	 * Creates a permission type where only the objects specified are allowed to view/enter/move requested objects into/out of the requested container
	 * @param allowed the objects allowed to view/enter/move
	 * @return a read/write permissions object
	 */
	@SafeVarargs
	public static <T extends SWGObject> ReadWritePermissions from(T ... allowed) {
		if (allowed.length == 0)
			return PERMISSIONS;
		return new ReadWritePermissions(Set.of(allowed));
	}
	
	public static ReadWritePermissions from(MongoData data) {
		return new ReadWritePermissions(data);
	}
	
}
