#!/usr/bin/env bash
set -u

red=$'\e[31m'
green=$'\e[32m'
yellow=$'\e[33m'
reset=$'\e[0m'

if [[ ! -t 1 || -n ${NO_COLOR:-} ]]; then
    red=
    green=
    yellow=
    reset=
fi

print_status() {
    local color=$1
    local label=$2
    local message=$3

    printf '%s%-5s%s %s\n' "$color" "$label" "$reset" "$message"
}

print_status "$red" ERROR 'disk space low'
print_status "$green" OK 'backup completed'
print_status "$yellow" WARN 'restart pending'
printf 'plain text after reset\n'