# 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 <http://www.gnu.org/licenses/>.

__systemctl() {
        local mode=$1; shift 1
        systemctl $mode --full --no-legend "$@"
}

__contains_word () {
        local word=$1; shift
        for w in $*; do [[ $w = $word ]] && return 0; done
        return 1
}

__filter_units_by_property () {
        local mode=$1 property=$2 value=$3 ; shift 3
        local units=("$@")
        local props
        IFS=$'\n' read -rd '' -a props < \
            <(__systemctl $mode show --property "$property" -- "${units[@]}")
        for ((i=0; $i < ${#units[*]}; i++)); do
                if [[ "${props[i]}" = "$property=$value" ]]; then
                        printf "%s\n" "${units[i]}"
                fi
        done
}

__get_all_units      () { __systemctl $1 list-units --all \
        | { while read -r a b; do printf "%s\n" "$a"; done; }; }
__get_active_units   () { __systemctl $1 list-units       \
        | { while read -r a b; do printf "%s\n" "$a"; done; }; }
__get_inactive_units () { __systemctl $1 list-units --all \
        | { while read -r a b c d; do [[ $c == "inactive" ]] && printf "%s\n" "$a"; done; }; }
__get_failed_units   () { __systemctl $1 list-units       \
        | { while read -r a b c d; do [[ $c == "failed"   ]] && printf "%s\n" "$a"; done; }; }
__get_enabled_units  () { __systemctl $1 list-unit-files  \
        | { while read -r a b c  ; do [[ $b == "enabled"  ]] && printf "%s\n" "$a"; done; }; }
__get_disabled_units () { __systemctl $1 list-unit-files  \
        | { while read -r a b c  ; do [[ $b == "disabled" ]] && printf "%s\n" "$a"; done; }; }
__get_masked_units   () { __systemctl $1 list-unit-files  \
        | { while read -r a b c  ; do [[ $b == "masked"   ]] && printf "%s\n" "$a"; done; }; }

_systemctl () {
        local i verb comps mode cur prev
        _get_comp_words_by_ref cur prev
        local OPTS_STANDALONE='--all -a --defaults --fail --ignore-dependencies --failed --force -f --full --global
               --help -h --no-ask-password --no-block --no-legend --no-pager --no-reload --no-wall
               --quiet -q --privileged -P --system --user --version --runtime'
        local OPTS_ARG='--host -H --kill-mode --kill-who --property -p --signal -s --type -t --root'

        if __contains_word "$prev" "$OPTS_ARG"; then
                case $prev in
                        --signal|-s)
                                comps=$(compgen -A signal)
                        ;;
                        --type|-t)
                                comps='automount device mount path service snapshot socket swap target timer'
                        ;;
                        --kill-who)
                                comps='all control main'
                        ;;
                        --kill-mode)
                                comps='control-group process'
                        ;;
                        --root)
                                comps=$(compgen -o filenames -A directory -- "$cur" )
                        ;;
                        --host|-H)
                                comps=$(compgen -A hostname)
                        ;;
                        --property|-p)
                                comps=''
                        ;;

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


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

        if __contains_word "--user" $COMP_WORDS; then
            mode=--user
        else
            mode=--system
        fi

        local VERBS_ALL_UNITS='is-active is-failed is-enabled status show mask preset'
        local VERBS_ENABLED_UNITS='disable reenable'
        local VERBS_DISABLED_UNITS='enable'
        local VERBS_FAILED_UNITS='reset-failed'
        local VERBS_STARTABLE_UNITS='start'
        local VERBS_STOPPABLE_UNITS='stop condstop kill try-restart condrestart'
        local VERBS_ISOLATABLE_UNITS='isolate'
        local VERBS_RELOADABLE_UNITS='reload condreload reload-or-try-restart force-reload'
        local VERBS_RESTARTABLE_UNITS='restart reload-or-restart'
        local VERBS_MASKED_UNITS='unmask'
        local VERBS_JOBS='cancel'
        local VERBS_SNAPSHOTS='delete'
        local VERBS_ENVS='set-environment unset-environment'
        local VERBS_STANDALONE='daemon-reexec daemon-reload default dump
                                emergency exit halt hibernate hybrid-sleep kexec list-jobs
                                 list-units list-unit-files poweroff reboot rescue
                                 show-environment suspend'
        local VERBS_NAME='snapshot load'
        local VERBS_FILE='link'
        local VERBS="$VERBS_ALL_UNITS $VERBS_FAILED_UNITS $VERBS_STARTABLE_UNITS
                $VERBS_STOPPABLE_UNITS $VERBS_ISOLATABLE_UNITS $VERBS_RELOADABLE_UNITS
                $VERBS_JOBS $VERBS_SNAPSHOTS $VERBS_ENVS $VERBS_STANDALONE $VERBS_NAME"

        local verb
        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_ALL_UNITS"; then
                comps=$( __get_all_units $mode )

        elif __contains_word "$verb" "$VERBS_ENABLED_UNITS"; then
                comps=$( __get_enabled_units $mode )

        elif __contains_word "$verb" "$VERBS_DISABLED_UNITS"; then
                comps=$( __get_disabled_units $mode )

        elif __contains_word "$verb" "$VERBS_STARTABLE_UNITS"; then
                comps=$( __filter_units_by_property $mode CanStart yes \
                      $( __get_inactive_units $mode \
                        | while read -r line; do \
                                [[ "$line" =~ \.(device|snapshot)$ ]] || printf "%s\n"  "$line"; \
                        done ))

        elif __contains_word "$verb" "$VERBS_RESTARTABLE_UNITS"; then
                comps=$( __filter_units_by_property $mode CanStart yes \
                      $( __get_all_units $mode \
                        | while read -r line; do \
                                [[ "$line" =~ \.(device|snapshot|socket|timer)$ ]] || printf "%s\n"  "$line"; \
                        done ))

        elif __contains_word "$verb" "$VERBS_STOPPABLE_UNITS"; then
                comps=$( __filter_units_by_property $mode CanStop yes \
                      $( __get_active_units $mode ) )

        elif __contains_word "$verb" "$VERBS_RELOADABLE_UNITS"; then
                comps=$( __filter_units_by_property $mode CanReload yes \
                      $( __get_active_units $mode ) )

        elif __contains_word "$verb" "$VERBS_ISOLATABLE_UNITS"; then
                comps=$( __filter_units_by_property $mode AllowIsolate yes \
                      $( __get_all_units $mode ) )

        elif __contains_word "$verb" "$VERBS_FAILED_UNITS"; then
                comps=$( __get_failed_units $mode )

        elif __contains_word "$verb" "$VERBS_MASKED_UNITS"; then
                comps=$( __get_masked_units $mode )

        elif __contains_word "$verb" "$VERBS_STANDALONE" "$VERBS_NAME"; then
                comps=''

        elif __contains_word "$verb" "$VERBS_JOBS"; then
                comps=$( __systemctl $mode list-jobs | { while read -r a b; do printf "%s\n"  "$a"; done; } )

        elif __contains_word "$verb" "$VERBS_SNAPSHOTS"; then
                comps=$( __systemctl $mode list-units --type snapshot --full --all \
                        | { while read -r a b; do printf "%s\n"  "$a"; done; } )

        elif __contains_word "$verb" "$VERBS_ENVS"; then
                comps=$( __systemctl $mode show-environment \
                    | while read -r line; do printf "%s\n"  "${line%%=*}=";done )

        elif __contains_word "$verb" "$VERBS_FILE"; then
                comps=$( compgen -o filenames -A file -- "$cur" )

        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _systemctl systemctl

__get_all_sessions () { loginctl list-sessions | { while read -r a b; do printf "%s\n" "$a"; done; } ; }
__get_all_users    () { loginctl list-users    | { while read -r a b; do printf "%s\n" "$b"; done; } ; }
__get_all_seats    () { loginctl list-seats    | { while read -r a b; do printf "%s\n" "$a"; done; } ; }

_loginctl () {
        local i verb comps cur prev
        _get_comp_words_by_ref cur prev

        local OPTS_STANDALONE='--all -a --help -h --no-pager --privileged -P --version'
        local OPTS_ARG='--host -H --kill-who --property -p --signal -s'

        if __contains_word "$prev" "$OPTS_ARG"; then
                case $prev in
                        --signal|-s)
                                comps=$(compgen -A signal)
                        ;;
                        --kill-who)
                                comps='all leader'
                        ;;
                        --host|-H)
                                comps=$(compgen -A hostname)
                        ;;
                        --property|-p)
                                comps=''
                        ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

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

        local VERBS_SESSIONS='session-status show-session activate lock-session unlock-session terminate-session kill-session'
        local VERBS_USERS='user-status show-user enable-linger disable-linger terminate-user kill-user'
        local VERBS_SEATS='seat-status show-seat terminate-seat'
        local VERBS_STANDALONE='list-sessions list-users list-seats flush-devices'
        local VERBS_ATTACH='attach'
        local VERBS="$VERBS_SESSIONS $VERBS_USERS $VERBS_SEATS $VERBS_STANDALONE $VERBS_ATTACH"

        local verb
        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_SESSIONS"; then
                comps=$( __get_all_sessions )

        elif __contains_word "$verb" "$VERBS_USERS"; then
                comps=$( __get_all_users )

        elif __contains_word "$verb" "$VERBS_SEATS"; then
                comps=$( __get_all_seats )

        elif __contains_word "$verb" "$VERBS_STANDALONE"; then
                comps=''

        elif __contains_word "$verb" $VERBS_ATTACH; then
                if [[ $prev = $verb ]]; then
                        comps=$( __get_all_seats )
                else
                        comps=$(compgen -o filenames -A file -- "$cur" )
                fi
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _loginctl loginctl

__journal_fields='MESSAGE MESSAGE_ID PRIORITY CODE_FILE CODE_LINE CODE_FUNC
                  ERRNO SYSLOG_FACILITY SYSLOG_IDENTIFIER SYSLOG_PID COREDUMP_EXE
                  _PID _UID _GID _COMM _EXE _CMDLINE
                  _AUDIT_SESSION _AUDIT_LOGINUID
                  _SYSTEMD_CGROUP _SYSTEMD_SESSION _SYSTEMD_UNIT _SYSTEMD_OWNER_UID
                  _SELINUX_CONTEXT _SOURCE_REALTIME_TIMESTAMP
                  _BOOT_ID _MACHINE_ID _HOSTNAME _TRANSPORT
                  _KERNEL_DEVICE _KERNEL_SUBSYSTEM
                  _UDEV_SYSNAME _UDEV_DEVNODE _UDEV_DEVLINK
                  __CURSOR __REALTIME_TIMESTAMP __CURSOR __MONOTONIC_TIMESTAMP'

_journalctl() {
        local field_vals cur prev comps
        _get_comp_words_by_ref cur prev

        local OPTS_STANDALONE='-a --all --full
                               -b --this-boot --disk-usage -f --follow --header
                               -h --help -l --local --new-id128 -m --merge --no-pager
                               --no-tail -q --quiet --setup-keys --this-boot --verify
                               --version --list-catalog --update-catalog'
        local OPTS_ARG='-D --directory -F --field -o --output -i --unit --user-unit'
        local OPTS_ARGUNKNOWN='-c --cursor --interval -n --lines -p --priority --since --until
                               -verify-key'

        if __contains_word "$prev" "$OPTS_ARG" $OPTS_ARGUNKNOWN; then
                case $prev in
                        --directory|-D)
                                comps=$(compgen -o filenames -d -- "$cur")
                        ;;
                        --output|-o)
                                comps='short short-monotonic verbose export json cat'
                        ;;
                        --field|-F)
                                comps=$__journal_fields
                        ;;
                        --unit|-u)
                                comps=$(journalctl -F '_SYSTEMD_UNIT' 2>/dev/null)
                        ;;
                        --user-unit)
                                comps=$(journalctl -F '_SYSTEMD_USER_UNIT' 2>/dev/null)
                        ;;
                        *)
                                return 0
                        ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

        if [[ $cur = -* ]]; then
                COMPREPLY=( $(compgen -W '$OPTS_ARG $OPTS_STANDALONE' -- "$cur") )
                return 0
        elif [[ $cur = *=* ]]; then
                field_vals=( $(journalctl -F "${prev%=}" 2>/dev/null) )
                COMPREPLY=( $(compgen -W '$field_vals' -- "${cur#=}") )
        elif [[ $cur = /dev* ]]; then
                COMPREPLY=( $(compgen -o filenames -f -- "${cur}") )
        elif [[ $cur = /* ]]; then
                # Append /dev/ to the list of completions, so that
                # after typing /<TAB><TAB> the user sees /dev/ as one
                # of the alternatives. Later on the rule above will
                # take care of showing device files in /dev/.
                field_vals=( $(journalctl -F "_EXE" 2>/dev/null; echo '/dev/') )
                COMPREPLY=( $(compgen -W '$field_vals' -- "${cur}") )
                if [[ "${COMPREPLY}" = '/dev/' ]]; then
                    COMPREPLY=( $(compgen -o filenames -f -- "${cur}") )
                fi
        elif [[ $prev = '=' ]]; then
                field_vals=( $(journalctl -F "${COMP_WORDS[COMP_CWORD-2]}" 2>/dev/null) )
                COMPREPLY=( $(compgen -W '$field_vals' -- "$cur") )
        else
                COMPREPLY=( $(compgen -o nospace -W '$__journal_fields' -S= -- "$cur") )
        fi
}
complete -F _journalctl journalctl

_coredumpctl() {
        local i field_vals verb comps cur prev
        _get_comp_words_by_ref cur prev
        local OPTS='-h --help --version --no-pager --no-legend -o --output -F --field'

        local VERBS_LIST='list'
        local VERBS_DUMP='dump gdb'
        local VERBS="$VERBS_LIST $VERBS_DUMP"

        if __contains_word "$prev" '--output -o'; then
                comps=$( compgen -A file -- "$cur" )
                compopt -o filenames
        elif __contains_word "$prev" '--FIELD -F'; then
                comps=$( compgen -W '$__journal_fields' -- "$cur" )
        elif [[ $cur = -* ]]; then
                comps=$OPTS
        elif __contains_word "$prev" $VERBS &&
           ! __contains_word ${COMP_WORDS[COMP_CWORD-2]} '--output -o -F --field'; then
                compopt -o nospace
                COMPREPLY=( $(compgen -W '$__journal_fields' -S= -- "$cur") )
               return 0
        elif [[ $cur = *=* ]]; then
                field_vals=( $(systemd-coredumpctl -F "${prev%=}" 2>/dev/null) )
                COMPREPLY=( $(compgen -W '$field_vals' -- "${cur#=}") )
                return 0
        elif [[ $prev = '=' ]]; then
                field_vals=( $(systemd-coredumpctl -F "${COMP_WORDS[COMP_CWORD-2]}" 2>/dev/null) )
                comps=$field_vals
        else
                for ((i=0; i <= COMP_CWORD; i++)); do
                        if __contains_word "${COMP_WORDS[i]}" $VERBS; then
                                verb=${COMP_WORDS[i]}
                                break
                        fi
                done

                if [[ -z $verb ]]; then
                        comps=$VERBS
                elif __contains_word "$verb" $VERBS_LIST $VERBS_DUMP; then
                        comps=''
                fi
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _coredumpctl systemd-coredumpctl

_timedatectl() {
        local i verb comps cur prev
        _get_comp_words_by_ref cur prev
        local OPTS='-h --help --version --adjust-system-clock --no-pager
                    --no-ask-password -H --host'

        if __contains_word "$prev" $OPTS; then
                case $prev in
                        --host|-H)
                                comps=''
                        ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

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

        local VERBS_BOOLEAN='set-local-rtc set-ntp'
        local VERBS_STANDALONE='status set-time list-timezones'
        local VERBS_TIMEZONES='set-timezone'
        local VERBS_TIME='set-time'
        local VERBS="$VERBS_BOOLEAN $VERBS_STANDALONE $VERBS_TIMEZONES $VERBS_TIME"

        for ((i=0; i <= COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" $VERBS; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        if [[ -z $verb ]]; then
                comps=$VERBS
        elif __contains_word "$verb" $VERBS_BOOLEAN; then
                comps='true false'
        elif __contains_word "$verb" $VERBS_TIMEZONES; then
                comps=$(command timedatectl list-timezones)
        elif __contains_word "$verb" $VERBS_STANDALONE $VERBS_TIME; then
                comps=''
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _timedatectl timedatectl


_localectl() {
        local i verb comps cur prev
        _get_comp_words_by_ref cur prev
        local OPTS='-h --help --version --no-convert --no-pager --no-ask-password
                    -H --host'

        if __contains_word "$prev" $OPTS; then
                case $prev in
                        --host|-H)
                                comps=''
                        ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

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

        local VERBS_STANDALONE='status list-locales list-keymaps'
        local VERBS_LOCALES='set-locale'
        local VERBS_KEYMAPS='set-keymap'
        local VERBS_X11='set-x11-keymap'
        local VERBS="$VERBS_STANDALONE $VERBS_LOCALES $VERBS_KEYMAPS $VERBS_X11"

        for ((i=0; i <= COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" $VERBS; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        if [[ -z $verb ]]; then
                comps=$VERBS
        elif __contains_word "$verb" $VERBS_LOCALES; then
                comps=$(command localectl list-locales)
        elif __contains_word "$verb" $VERBS_KEYMAPS; then
                comps=$(command localectl list-keymaps)
        elif __contains_word "$verb" $VERBS_STANDALONE $VERBS_X11; then
                comps=''
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _localectl localectl

_hostnamectl() {
        local i verb comps cur prev
        _get_comp_words_by_ref cur prev
        local OPTS='-h --help --version --transient --static --pretty
                    --no-ask-password -H --host'

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

        local VERBS_STANDALONE='status'
        local VERBS_ICONS='set-icon-name'
        local VERBS_NAME='set-hostname'
        local VERBS="$VERBS_STANDALONE $VERBS_ICONS $VERBS_NAME"

        for ((i=0; i <= COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" $VERBS; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        if [[ -z $verb ]]; then
                comps=$VERBS
        elif __contains_word "$verb" $VERBS_STANDALONE $VERBS_ICONS $VERBS_NAME; then
                comps=''
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}
complete -F _hostnamectl hostnamectl
