#!/bin/sh -e

pebkac() {
  [ "${*}" ] && printf "%s\n\n" "${*}"
  cat <<EOF
Usage: $(basename "${0}") <url>

Given a post URL number from the site:
* downloads and stashes the full-size image in the md5 directory
* adds whatever tags are found into the tag area

  -n             Noop-mode; do not download image nor write tags
  -p <poolname>  Associates the downloaded image with a pool
  -i <indexnum>  Used with -p to indicate the position in the pool

  -t             Refresh the tags, not the picture
  -f <filename>  If the image is deleted, provide the local filename
EOF
  kill $$
  exit 1
}

while getopts dnp:i:tf: OPT
do
  case "${OPT}" in
  d)  DEBUG=DEBUG      ;;
  n)  noop=noop        ;;
  p)  pool="${OPTARG}" ;;
  i)  indx="${OPTARG}" ;;
  t)  tags=TAGS        ;;
  f)  hash="${OPTARG}" ;;
  ?)  pebkac           ;;
  esac
done
shift $(( $OPTIND - 1 ))

[ "${*}" ] || pebkac
url="${1}"
#[ -z "$(echo "${id}" | tr -d '[0-9]')" ] || pebkac "ID should be an integer"

taggery_base="$(dirname "${0}")"
taggery_libs="$(dirname "${0}")/lib"

# Try and find the profile that can handle the url
profiles="$(cd "${taggery_libs}/profiles"; ls -1 | sed -e 's/.sh$//')"
for profile in ${profiles}
do
  . "${taggery_libs}/profiles/${profile}.sh"
  "${profile}_can_handle" "${url}" || continue
  taggery_name="${profile}"
  break
done

# Set up temporary area
#mkdir -p "$(dirname "${0}")/tmp"
#TMPDIR="$(dirname "${0}")/tmp"

# Load KVS
#kvs="${TMPDIR}/.${taggery_name}.kvdb"
#. "$(dirname "${0}")/lib/kvs.sh"

# Load Taggery
. "${taggery_libs}/taggery.sh"

id="$(taggery_id "${url}")"
name="$(taggery_image_name "${id}")"
file="$(taggery_image_url "${id}")"
tags="$(taggery_image_tags "${id}")"
[ "${file}" ] || name="${hash}"
extn="${name#*.}"

[ "${DEBUG}" ] && {
  echo "id: ${id}"
  echo "name: ${name}"
  echo "file: ${file}"
  echo "tags: ${tags}"
  echo ""
  kvs_get_all "${taggery_name}/${id}"
  kill -KILL $$
}

[ "${file}" -o "${hash}" ] || { echo "No download URL (deleted?) and -f not provided" >&2; kill -ABRT $$; exit 1; }
[ "${tags}" ] || { echo "No tags found" >&2; kill -ABRT $$; exit 1; }

unset nabbed
if [ "${file}" ]
then
  if [ -e "${taggery_base}/md5/${name}" ]
  then
    echo "Filename ${name} already exists"
  else
    if [ "${noop}" ]
    then
      echo "taggery_fetch_image(${id})"
      echo "taggery_image_url => $(taggery_image_url "${id}")"
      echo "taggery_image_name => $(taggery_image_name "${id}")"
    else
      taggery_fetch_image "${id}"
      nabbed=NABBED
    fi
  fi
fi

if [ "${nabbed}" -o "${tags}" ]
then
  if [ "${noop}" ]
  then
    echo "taggery_link_tags(${id}):"
    echo "${tags}" | sed -e 's/^/  /g'
  else
    taggery_link_tags "${id}"
  fi
fi

# Even if we didn't download it, try to link it into the pool
[ -z "${noop}" ] && [ "${pool}" ] && {
  plnm="${taggery_base}/pool/${pool}/${indx}.${extn}"
  if [ -e "${plnm}" ]
  then
    echo "Filename ${plnm} already exists"
  else
    mkdir -p "${taggery_base}/pool/${pool}"
    ln -svf "../../md5/${name}" "${plnm}"
  fi
}