#!/bin/sh

# The MIT License (MIT)
#
# Copyright © 2025 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.


# jawk [good...] [bad...] [meh...] [filenames...]
#
# Judge with AWK colors lines using up to 3 (optional) AWK conditions, named
# `good` (green), `bad` (red), and `meh` (gray) respectively. Lines failing
# all the conditions given are shown back verbatim.
#
# The good style is a colorblind-friendly blue if the environment variable
# COLORBLIND is declared and set to 1.


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

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

command='awk'
if [ -p /dev/stdout ] || [ -t 1 ]; then
    command='stdbuf -oL awk'
fi

good="${1:-0}"
bad="${2:-0}"
meh="${3:-0}"

[ $# -gt 0 ] && shift
[ $# -gt 0 ] && shift
[ $# -gt 0 ] && shift

# show all non-existing files given
failed=0
for arg in "$@"; do
    if [ "${arg}" = "-" ]; then
        continue
    fi
    if [ ! -e "${arg}" ]; then
        printf "no file named \"%s\"\n" "${arg}" > /dev/stderr
        failed=1
    fi
done

if [ "${failed}" -gt 0 ]; then
    exit 2
fi

${command} '
    BEGIN {
        # normal good-style is green, colorblind-friendly good-style is blue
        cb = ENVIRON["COLORBLIND"] != 0 || ENVIRON["COLOR_BLIND"] != 0
        good_style = cb ? "\x1b[38;2;0;95;215m" : "\x1b[38;2;0;135;95m"
        good_fmt = good_style "%s\x1b[0m\n"
        good_reset = "\x1b[0m" good_style
    }

    FNR == 1 { FS = /\t/ ? "\t" : " "; $0 = $0 }
    { low = lower = tolower($0) }

    '"${good}"' {
        gsub(/\x1b\[0m/, good_reset)
        printf good_fmt, $0
        next
    }

    '"${bad}"' {
        gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;204;0;0m")
        printf "\x1b[38;2;204;0;0m%s\x1b[0m\n", $0
        next
    }

    '"${meh}"' {
        gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;168;168;168m")
        printf "\x1b[38;2;168;168;168m%s\x1b[0m\n", $0
        next
    }

    1
' "$@"