#compdef scselect

local ret=1 u l
local -a context line state state_descr tmp loc1 loc2
local -A opt_args

_arguments -s -S : \
  '-n[delay changing until next boot]' \
  '1: :->locations' \
&& ret=0

[[ $state == locations ]] && {
  # For some reason scselect expects location names to be encoded in Mac OS
  # Roman; in order to prevent completed arguments from breaking the tool, we'll
  # insert the UUID instead if the name would contain incompatible characters
  tmp=( ${(f)"$( command $service 2> /dev/null )"} )
  tmp=( ${tmp[2,-1]} )
  tmp=( ${tmp##[*[:space:]]##} )
  tmp=( ${tmp//:/\\:} )
  tmp=( ${tmp/[[:space:]]##\(/$'\0'} )
  tmp=( ${tmp%\)} )

  for u l in "${(@0)tmp}"; do
    loc1+=( "${l}:${u}" )
    if [[ $l == [[:ascii:]]## ]]; then
      loc2+=( $l )
    else
      loc2+=( $u )
    fi
  done

  if (( $#loc1 )); then
    _describe location loc1 loc2 && ret=0
  else
    _message location && ret=0
  fi
}

return ret