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.player.inventory;

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

import fr.quatrevieux.araknemu.game.item.Item;

import fr.quatrevieux.araknemu.game.item.effect.ItemEffect;

import fr.quatrevieux.araknemu.game.item.inventory.AbstractItemEntry;

import fr.quatrevieux.araknemu.game.item.inventory.event.ObjectMoved;

import fr.quatrevieux.araknemu.game.item.inventory.exception.InventoryException;

import fr.quatrevieux.araknemu.game.item.inventory.exception.MoveException;

import java.util.stream.Collectors;

/**

 * Entry for player repository

 */

public final class InventoryEntry extends AbstractItemEntry {

    private final PlayerInventory inventory;

    private final PlayerItem entity;

    private final Item item;

    public InventoryEntry(PlayerInventory inventory, PlayerItem entity, Item item) {

        super(inventory, entity, item, inventory);

        this.inventory = inventory;

        this.entity = entity;

        this.item = item;

    }

    @Override

    public int position() {

        return entity.position();

    }

    /**

     * Move the entry to a new position

     *

     * @param position The new position

     * @param quantity Quantity to move

     *

     * @throws MoveException When the item is already on the requested position

     */

    public void move(int position, int quantity) throws InventoryException {

        if (quantity > quantity() || quantity <= 0) {

            throw new InventoryException("Invalid quantity given");

        }

        if (position == position()) {

            throw new MoveException("The item is already on the requested position");

        }

        if (quantity == quantity()) {

            if (inventory.move(this, position)) {

                changePosition(position);

            }

            return;

        }

        inventory.add(item, quantity, position);

        remove(quantity);

    }

    /**

     * Set the item to the default position

     * Note: this method is internal and should not be called

     */

    public void setToDefaultPosition() {

        entity.setPosition(DEFAULT_POSITION);

    }

    /**

     * Get the database entity

     */

    private void changePosition(int position) {

        entity.setPosition(position);

        inventory.dispatch(new ObjectMoved(this));

    }

    /**

     * Create a new entry

     */

    static InventoryEntry create(PlayerInventory inventory, int id, Item item, int quantity, int position) {

        return new InventoryEntry(

            inventory,

            new PlayerItem(

                inventory.owner().id(),

                id,

                item.template().id(),

                item.effects().stream().map(ItemEffect::toTemplate).collect(Collectors.toList()),

                quantity,

                position

            ),

            item

        );

    }

}