#!/bin/bash

# Base URL for the chunked files
BASE_URL="https://huggingface.co/datasets/LEAP/ChaosBench/resolve/main/$1/"

# The base name of the files (without extension)
BASE_NAME="$1_chunks"

# Extension for the chunked files
EXTENSION="tar.gz"

# Download all chunked files
for prefix in {a..z}; do
    for suffix in {a..z}; do
        FILE_NAME="${BASE_NAME}.${EXTENSION}.${prefix}${suffix}"
        wget "${BASE_URL}${FILE_NAME}" || break 2
    done
done

# Combine the chunked files
echo "COMBINING CHUNKS, THIS MAY TAKE A WHILE..."
cat ${BASE_NAME}.${EXTENSION}.* > "$1".tar.gz

# Remove the chunked files
rm ${BASE_NAME}.${EXTENSION}.*

# Extract the combined file
echo "EXTRACTING FOLDER, THIS MAY TAKE A WHILE..."
if [ "$2" == "with_pigz" ]; then
    echo "Use pigz for parallel decompression..."
    pigz -dc "$1".tar.gz | tar -xf -
else
    # Use standard tar for decompression
    tar -xzf "$1".tar.gz
fi

# Remove the combined compressed file
rm "$1".tar.gz

# Rename folder
mv "$1"_tmp "$1"