#compdef add-zsh-hook

_add-zsh-hook_hooks() {
  local expl
  if (( $+opt_args[-d] )); then
    _wanted functions expl "installed hook" compadd -a - "$line[1]_functions" && return 0
  else
    _functions && return 0
  fi
  return 1
}

_add-zsh-hook() {
  local context state state_descr line
  typeset -A opt_args
  _arguments -s -w -S : \
    "(-d -D -U -z -k)-L[output in form of 'typeset' commands]" \
    '(-L -D -U -z -k)-d[remove HOOK from the array]' \
    '(-L -d -U -z -k)-D[interpret HOOK as pattern to remove from the array]' \
    '(-L -d -D)-U[suppress alias expansion for functions]' \
    '(-L -d -D -k)-z[mark function for zsh-style autoloading]' \
    '(-L -d -D -z)-k[mark function for ksh-style autoloading]' \
    ':hook class:(chpwd precmd preexec periodic zshaddhistory zshexit zsh_directory_name)' \
    ':hook function:_add-zsh-hook_hooks'
}

_add-zsh-hook "$@"