# shellcheck shell=bash
# userdbctl(1) completion                                  -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# This file is part of systemd.
#
# Copyright © 2010 Ran Benita
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# systemd 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 Lesser General Public License
# along with systemd; If not, see <https://www.gnu.org/licenses/>.

__contains_word () {
    local w word=$1; shift
    for w in "$@"; do
        [[ $w = "$word" ]] && return
    done
}

__get_all_users () {
    local a b
    userdbctl user --no-legend -B 2>/dev/null | { while read -r a b; do printf "%s\n" "$a"; done; }
}

__get_all_groups () {
    local a b
    userdbctl group --no-legend -B 2>/dev/null | { while read -r a b; do printf "%s\n" "$a"; done; }
}

_userdbctl () {
    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
    local i verb comps

    local -A OPTS=(
        [STANDALONE]='-h --help --version --no-pager --no-legend
                      -j -N --chain -z --fuzzy -I -S -R -B'
        [ARG]='--output -s --service --with-nss --synthesize --with-dropin --with-varlink
               --multiplexer --json --uid-min --uid-max --disposition --boundaries --from-file'
    )

    if __contains_word "$prev" ${OPTS[ARG]}; then
        case $prev in
            --output)
                comps=$( userdbctl --output=help 2>/dev/null )
                ;;
            -s|--service|--uid-min|--uid-max)
                comps=''
                ;;
            --with-nss|--synthesize|--with-dropin|--with-varlink|--multiplexer|--boundaries)
                comps='yes no'
                ;;
            --json)
                comps=$( userdbctl --json=help 2>/dev/null )
                ;;
            --disposition)
                comps='intrinsic system dynamic regular container reserved'
                ;;
        esac
        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
    fi

    if [[ "$cur" = -* ]]; then
        COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
        return 0
    fi

    local -A VERBS=(
        [USERS]='ssh-authorized-keys user users-in-group'
        [GROUPS]='group groups-of-user'
        [STANDALONE]='services'
    )

    for ((i=0; i < COMP_CWORD; i++)); do
        if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
                ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
            verb=${COMP_WORDS[i]}
            break
        fi
    done

    if   [[ -z ${verb-} ]]; then
        comps="${VERBS[*]}"
    elif __contains_word "$verb" ${VERBS[USERS]}; then
        comps=$( __get_all_users )
    elif __contains_word "$verb" ${VERBS[GROUPS]}; then
        comps=$( __get_all_groups )
    elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
        comps=''
    fi

    COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
    return 0
}

complete -F _userdbctl userdbctl
