#!/bin/bash
#
# Original Copyright 2021 DeepMind Technologies Limited
# Modifications Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Downloads and unzips the PDB70 database for AlphaFold.
#
# Usage: bash download_pdb70.sh /path/to/download/directory
set -e

if [[ $# -eq 0 ]]; then
    echo "Error: download directory must be provided as an input argument."
    exit 1
fi

if ! command -v aria2c &> /dev/null ; then
    echo "Error: aria2c could not be found. Please install aria2c (sudo apt install aria2)."
    exit 1
fi

DOWNLOAD_DIR="$1"
ROOT_DIR="${DOWNLOAD_DIR}/pdb70"
# SOURCE_URL="http://wwwuser.gwdg.de/~compbiol/data/hhsuite/databases/hhsuite_dbs/old-releases/pdb70_from_mmcif_200401.tar.gz"
SOURCE_URL="http://wwwuser.gwdg.de/~compbiol/data/hhsuite/databases/hhsuite_dbs/pdb70_from_mmcif_latest.tar.gz"
BASENAME=$(basename "${SOURCE_URL}")

mkdir --parents "${ROOT_DIR}"
aria2c "${SOURCE_URL}" --dir="${ROOT_DIR}"
tar --extract --verbose --file="${ROOT_DIR}/${BASENAME}" \
  --directory="${ROOT_DIR}"
rm "${ROOT_DIR}/${BASENAME}"