# Bash completion for xfconf-query.
#
# Copyright (C) 2019 Emanuele Petriglia <inbox@emanuelepetriglia.com>
#
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
# Street, Fifth Floor, Boston, MA  02110-1301  USA

_xfconf-query() {
  local current options words long_options
  COMPREPLY=()
  current="${COMP_WORDS[$COMP_CWORD]}"
  previous="${COMP_WORDS[$COMP_CWORD - 1]}"
  short_options="-h -V -c -p -s -l -v -n -t -r -R -a -T -m"

  long_options="--help --version --channel --property --set --list --verbose"
  long_options+=" --create --type --reset --recursive --force-array --toggle"
  long_options+=" --monitor"

  options="$short_options $long_options"

  if [[ "$current" == --* ]]; then
    words="$long_options"
  elif [[ "$current" == -* ]]; then
    words="$options"
  else
    case "$previous" in
      # Delete first line and the initial two spaces (see 'xfconf-query -l').
      -c|--channel) words="$(xfconf-query -l | sed -e '1d' -e 's/^  //')" ;;
      -p|--property)
        # Get given channel, if exists.
        channel="$(echo "$COMP_LINE" | grep -oPe '(-c|--channel) \K([a-z]+)')"

        if [[ "$channel" ]]; then
          words="$(xfconf-query -c "$channel" -l)"
        fi
        ;;
    esac
  fi

  mapfile -t COMPREPLY < <(compgen -W "$words" -- "$current")
  return 0
}

complete -F _xfconf-query xfconf-query