#!/bin/sh

usage() {
  cat <<__EOF__
usage: $(basename $0) [-hl] [-u user] [-X args] [-d args]
-h        print this help text
-l        print list of files to download
-u user   download as authenticated user
-X args   extra arguments to pass to xargs
-d args   extra arguments to pass to the download program

__EOF__
}

username=
xargsopts=
prompt=
list=
while getopts hlu:xX:d: option; do
  case $option in
  h)
    usage
    exit
    ;;
  l) list=yes ;;
  u)
    prompt=yes
    username="$OPTARG"
    ;;
  X) xargsopts="$OPTARG" ;;
  d) download_opts="$OPTARG" ;;
  ?)
    usage
    exit 2
    ;;
  esac
done

cat <<__EOF__
      Please note that running this script will result in the entire data collection to be downloaded, i.e. 8.18 GB in 28 files.

      To refine the selection and download, visit the following URL:

           https://archive.eso.org/scienceportal/home?data_collection=ARP_VST

      and specify the relevant additional query constraints.

      Do you want to proceed with running this script (y/N)?
__EOF__

read continue_prompt

if [ "$continue_prompt" != "y" ]; then
  exit 0;
fi

if test -z "$xargsopts"; then
  #no xargs option speficied, we ensure that only one url
  #after the other will be used
  xargsopts='-L 1'
fi

if test -n "$prompt" -a -z "$list"; then
  trap 'stty echo 2>/dev/null; echo "Cancelled."; exit 1' INT HUP TERM
  stty -echo 2>/dev/null
  printf 'Password: '
  read password
  echo ''
  stty echo 2>/dev/null
fi

# use a tempfile to which only user has access
tempfile=$(mktemp /tmp/dl.XXXXXXXX 2>/dev/null)
test "$tempfile" -a -f $tempfile || {
  tempfile=/tmp/dl.$$
  (umask 077 && : >$tempfile)
}
trap 'rm -f $tempfile' EXIT INT HUP TERM

echo "auth_no_challenge=on" >$tempfile
# older OSs do not seem to include the required CA certificates for ESO
echo "check-certificate=off" >>$tempfile
if [ -n "$prompt" ]; then
  echo "--http-user=$username" >>$tempfile
  echo "--http-password=$password" >>$tempfile

fi
WGETRC=$tempfile
export WGETRC

unset password

if test -n "$list"; then
  cat
else
  xargs $xargsopts wget $download_opts
fi <<'__EOF__'
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.661
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.663
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.665
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.667
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.669
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.671
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.673
https://dataportal.eso.org/dataPortal/file/ADP.2025-10-01T09:13:35.675
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.234
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.236
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.238
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.240
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.242
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.244
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.246
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.248
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.250
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.252
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.254
https://dataportal.eso.org/dataPortal/file/ADP.2025-04-10T13:24:27.256
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.684
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.686
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.688
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.690
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.692
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.694
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.696
https://dataportal.eso.org/dataPortal/file/ADP.2025-11-21T09:59:51.698
__EOF__