/*
 * Copyright (c) 2025 GeyserMC. http://geysermc.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @author GeyserMC
 * @link https://github.com/GeyserMC/Geyser
 */

package org.geysermc.geyser.translator.level.block.entity;

import org.cloudburstmc.nbt.NbtMap;
import org.cloudburstmc.nbt.NbtMapBuilder;
import org.cloudburstmc.nbt.NbtType;
import org.geysermc.geyser.item.parser.ItemStackParser;
import org.geysermc.geyser.level.block.type.BlockState;
import org.geysermc.geyser.session.GeyserSession;
import org.geysermc.geyser.translator.item.BedrockItemBuilder;
import org.geysermc.mcprotocollib.protocol.data.game.level.block.BlockEntityType;

import java.util.Arrays;
import java.util.List;

@BlockEntity(type = BlockEntityType.SHELF)
public class ShelfBlockEntityTranslator extends BlockEntityTranslator {

    private static final int SLOT_COUNT = 3;

    @Override
    public void translateTag(GeyserSession session, NbtMapBuilder bedrockNbt, NbtMap javaNbt, BlockState blockState) {
        // We can't translate align_items_to_bottom, I think :(

        // Bedrock determines shelf item position by list index, so we must produce
        // a dense list with empty items for unoccupied slots.
        // Verified with BDS 26.0.2
        NbtMap[] items = new NbtMap[SLOT_COUNT];
        Arrays.fill(items, BedrockItemBuilder.EMPTY_ITEM);

        List<NbtMap> javaItems = javaNbt.getList("Items", NbtType.COMPOUND);
        for (NbtMap stack : javaItems) {
            int slot = stack.getByte("Slot");
            if (slot >= 0 && slot < SLOT_COUNT) {
                items[slot] = ItemStackParser.javaItemStackToBedrock(session, stack).build();
            }
        }

        bedrockNbt.putList("Items", NbtType.COMPOUND, Arrays.asList(items));
    }
}
