#!/bin/sh

# The MIT License (MIT)
#
# Copyright (c) 2026 pacman64
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


# pad [options...] [files...]
#
# PAD lines by adding trailing spaces to match the widest line.
#
# The only option available is to show this help message, using any of
# `-h`, `--h`, `-help`, or `--help`, without the quotes.


case "$1" in
    -h|--h|-help|--help)
        awk '/^# +pad /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
        exit 0
    ;;
esac

[ "$1" = '--' ] && shift

awk '
    {
        plain = $0
        gsub(/\x1b\[[0-9;]*[A-Za-z]/, "", plain)
        l = length(plain)
        if (width < l) width = l

        lines[NR] = $0
    }

    END {
        for (i = 1; i <= NR; i++) {
            plain = lines[i]
            gsub(/\x1b\[[0-9;]*[A-Za-z]/, "", plain)
            l = length(plain)

            printf "%s", lines[i]
            for (j = l + 1; j <= width; j++) printf " "
            print ""
        }
    }
' "$@"