#!/usr/bin/env zsh

eval "$_z4h_opt"

local -a centered indentation
zparseopts -D -F -- c=centered i:=indentation || return '_z4h_err()'
local -i centered=$#centered
local -i indentation=$(( indentation[2] ))
local -i columns='COLUMNS > 0 && COLUMNS <= 80 ? COLUMNS: 80'

local REPLY line word lines=()
for word in "$@"; do
  -z4h-prompt-length ${(g::):-"$line $word"}
  if (( REPLY > columns )); then
    [[ -z $line ]] || lines+=$line
    line=
  fi
  if [[ -n $line ]]; then
    line+=' '
  elif (( $#lines )); then
    line=${(pl:$indentation:: :)}
  fi
  line+=$word
done
[[ -z $line ]] || lines+=$line
for line in $lines; do
  -z4h-prompt-length ${(g::)line}
  (( centered && REPLY < columns )) && print -n -- ${(pl:$(((columns - REPLY) / 2)):: :)}
  print -P -- $line
done