package net.minecraft.network.protocol.game;

import java.util.List;
import java.util.Optional;
import net.minecraft.network.FriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.network.protocol.Packet;
import net.minecraft.network.protocol.PacketType;

public record ServerboundEditBookPacket(int slot, List<String> pages, Optional<String> title) implements Packet<ServerGamePacketListener> {
	public static final int MAX_BYTES_PER_CHAR = 4;
	private static final int TITLE_MAX_CHARS = 128;
	private static final int PAGE_MAX_CHARS = 8192;
	private static final int MAX_PAGES_COUNT = 200;
	public static final StreamCodec<FriendlyByteBuf, ServerboundEditBookPacket> STREAM_CODEC = StreamCodec.composite(
		ByteBufCodecs.VAR_INT,
		ServerboundEditBookPacket::slot,
		ByteBufCodecs.stringUtf8(8192).apply(ByteBufCodecs.list(200)),
		ServerboundEditBookPacket::pages,
		ByteBufCodecs.stringUtf8(128).apply(ByteBufCodecs::optional),
		ServerboundEditBookPacket::title,
		ServerboundEditBookPacket::new
	);

	public ServerboundEditBookPacket(int slot, List<String> pages, Optional<String> title) {
		pages = List.copyOf(pages);
		this.slot = slot;
		this.pages = pages;
		this.title = title;
	}

	@Override
	public PacketType<ServerboundEditBookPacket> type() {
		return GamePacketTypes.SERVERBOUND_EDIT_BOOK;
	}

	/**
	 * Passes this Packet on to the NetHandler for processing.
	 */
	public void handle(ServerGamePacketListener handler) {
		handler.handleEditBook(this);
	}
}