#compdef logger

local variant
local -a args aopts=( -A '-*' )

_pick_variant -r variant util-linux=util-linux $OSTYPE --version

case $variant in
  *)
    args+=(
      '(-f -e --file --journald --prio-prefix --skip-empty)*: :_guard "^-*" message'
      '(: * --journald)'{-f+,--file=}'[log contents of specified file]: :_files'
      '(--id)-i[log with PID of logger process]'
      '(-p --priority)'{-p+,--priority=}'[log with specified priority]: :_log_priorities'
      '(-t --tag)'{-t+,--tag=}'[log with specified tag]:tag'
    )
    ;|
  darwin*|dragonfly*|freebsd*|linux*|netbsd*|openbsd*)
    args+=(
      '(-s --stderr)'{-s,--stderr}'[also log to stderr (LOG_PERROR)]'
    )
    ;|
  netbsd*|openbsd*)
    args+=(
      '-c[log to console if unable to log normally (LOG_CONS)]'
    )
    ;|
  dragonfly*|freebsd*)
    args+=(
      '(-6)-4[log via IPv4 only]'
      '(-4)-6[log via IPv6 only]'
      '-A[log to all IP addresses associated with remote host name]'
      # @todo Complete UNIX-domain sockets
      '-h+[log to specified remote host or UNIX-domain socket]:remote syslog host:_hosts'
    )
    ;|
  freebsd*)
    args+=(
      '-H+[specify host name for message header]: :_hosts'
      '-P+[log to specified port (with -h)]:remote syslog port:_ports'
      # @todo This is another case where we need a dedicated _hosts_ports
      # function which can properly handle bracketed IPv6 address syntax
      '-S+[specify source address/port (with -h)]: :_bind_addresses -0bh'
    )
    ;;
  netbsd*)
    args+=(
      '-d+[log specified structured data]:structured data'
      '-m+[specify RFC5424 MSGID]:MSGID'
      '-n[open log connection immediately (LOG_NDELAY)]'
    )
    ;;
  util-linux)
    aopts=( )
    args+=(
      '(-d -T --tcp --udp)'{-d,--udp}'[log via UDP only (with -n)]'
      '(: * -e --skip-empty)'{-e,--skip-empty}'[ignore empty lines in input (with -f or stdin)]'
      '(-i)--id=-[log with PID of logger process or specified PID]:: :_pids'
      '(--rfc3164)--msgid=[specify RFC5424 MSGID]:MSGID'
      '(-n --server)'{-n+,--server=}'[log to specified remote host]:remote syslog host:_hosts'
      '--no-act[do not actually log]'
      '--octet-count[use RFC6587 octet counting]'
      '(-P --port)'{-P+,--port=}'[log to specified port (with -n)]:remote syslog port:_ports'
      '(: *)--prio-prefix[look for priority prefix <n> on each line (with -f or stdin)]'
      '(--msgid --rfc5424 --sd-id --sd-param)--rfc3164[use RFC3164 BSD syslog protocol]'
      '(--rfc3164)--rfc5424=-[use RFC5424 syslog protocol with optional exceptions]:protocol exceptions:((
        nohost\:"suppress gethostname(2) information"
        notime\:"suppress complete sender time stamp (implies notq)"
        notq\:"suppress time-quality structured data"
      ))'
      # @todo We could do a better job of completing these next two. The
      # util-linux man page describes the format and some of the known values.
      # Also, this is one of those cases where the options have to be given in
      # order, i.e., each --sd-param must be preceded by --sd-id and vice versa
      '(--rfc3164)*--sd-id=[specify RFC5424 structured-data element ID]:structured-data element ID'
      '(--rfc3164)*--sd-param=[specify RFC5424 structured-data element parameter]:structured-data element parameter (name=value)'
      '--size=[specify maximum message size]:message size (bytes)'
      '--socket-errors=-[specify socket error-printing behavior]:mode::(auto off on)'
      '(-u --socket)'{-u+,--socket=}'[write to specified socket instead of default]:syslog socket:_files -g "*(-=D)"'
      '(-d -T --tcp --udp)'{-t,--tcp}'[log via TCP only (with -n)]'
      '(: * -)'{-V,--version}'[display version information]'
      '(: * -)'{-h,--help}'[display help information]'
    )
    # This option actually ignores many other options, like -p
    (( $+commands[journalctl] )) && args+=(
      '(: * -f --file)--journald=-[log systemd journal entry from stdin or specified file]: ::_files'
    )
    ;;
esac

[[ $variant == util-linux ]] || args=( ${args:#(\([^\)]#\)|)(\*|)--*} )

_arguments -s -S $aopts : $args