/*
 * Copyright (c) 2019-2021 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.platform.bungeecord;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import net.md_5.bungee.netty.LengthPrependerAndCompressor;
import net.md_5.bungee.protocol.packet.LoginSuccess;
import net.md_5.bungee.protocol.packet.SetCompression;

public class GeyserBungeeCompressionDisabler extends ChannelOutboundHandlerAdapter {
    private boolean compressionDisabled = false;

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        if (!(msg instanceof SetCompression)) {
            // Fixes https://github.com/GeyserMC/Geyser/issues/4281
            // The server may send a LoginDisconnect packet after compression is set.
            if (!compressionDisabled) {
                LengthPrependerAndCompressor compressor = ctx.pipeline().get(LengthPrependerAndCompressor.class);
                if (compressor.isCompress()) {
                    compressor.setCompress(false);
                    compressionDisabled = true;
                }
                if (ctx.pipeline().get("decompress") != null) {
                    ctx.pipeline().remove("decompress");
                    compressionDisabled = true;
                }
            }

            if (msg instanceof LoginSuccess) {
                // We're past the point that compression can be enabled
                ctx.pipeline().remove(this);
            }
            super.write(ctx, msg, promise);
        }
    }
}
