package org.geysermc.connector.network.translators.java.world;

import com.github.steveice10.mc.protocol.packet.ingame.server.world.ServerChunkDataPacket;
import com.nukkitx.network.VarInts;
import com.nukkitx.protocol.bedrock.packet.LevelChunkPacket;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import org.geysermc.api.Geyser;
import org.geysermc.connector.console.GeyserLogger;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.PacketTranslator;
import org.geysermc.connector.utils.ChunkUtils;
import org.geysermc.connector.world.chunk.ChunkSection;

public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPacket> {

    @Override
    public void translate(ServerChunkDataPacket packet, GeyserSession session) {
        // Not sure if this is safe or not, however without this the client usually times out
        Geyser.getConnector().getGeneralThreadPool().execute(() -> {
            try {
                ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(packet.getColumn());
                ByteBuf byteBuf = Unpooled.buffer(32);
                ChunkSection[] sections = chunkData.sections;

                int sectionCount = sections.length - 1;
                while (sections[sectionCount].isEmpty()) {
                    sectionCount--;
                }
                sectionCount++;

                for (int i = 0; i < sectionCount; i++) {
                    ChunkSection section = chunkData.sections[i];
                    section.writeToNetwork(byteBuf);
                }

                byteBuf.writeBytes(chunkData.biomes); // Biomes - 256 bytes
                byteBuf.writeByte(0); // Border blocks - Edu edition only
                VarInts.writeUnsignedInt(byteBuf, 0); // extra data length, 0 for now

                byte[] payload = new byte[byteBuf.writerIndex()];
                byteBuf.readBytes(payload);

                LevelChunkPacket levelChunkPacket = new LevelChunkPacket();
                levelChunkPacket.setSubChunksLength(sectionCount);
                levelChunkPacket.setCachingEnabled(false);
                levelChunkPacket.setChunkX(packet.getColumn().getX());
                levelChunkPacket.setChunkZ(packet.getColumn().getZ());
                levelChunkPacket.setData(payload);
                session.getUpstream().sendPacket(levelChunkPacket);
            } catch (Exception ex) {
                ex.printStackTrace();
            }
            GeyserLogger.DEFAULT.info("Sent chunk packet!");
        });
    }
}