#!/bin/bash

set -euo pipefail


name="" # Your name
iban="" # Your International Bank Account Number, without separators
bic="" # The Bank Identification Code of your bank
currency="EUR"


if [ -z "$name" ] || [ -z "$iban" ] || [ -z "$bic" ]; then
	echo "Fill in your account information in $(realpath "$0")"
	exit 1
fi

if test $# -lt 2; then
	echo "Usage: $0 <amount> <message>" >&2
	exit 1
fi

amount="$1"
shift 1
message="$@"

echo "$(tput bold)Beneficiary$(tput sgr0)  $name"
echo "$(tput bold)Account$(tput sgr0)      $iban (BIC: $bic)"
echo "$(tput bold)Amount$(tput sgr0)       $amount $currency"
echo "$(tput bold)Message$(tput sgr0)      $message"

if ! [[ $amount =~ [0-9]+(\.[0-9]+)? ]]; then
	echo "Incorrect 'amount' format, (only) provide a decimal number like '1.5'" >&2
	exit 1
fi


rm -f /tmp/qr.png
qrencode -s 10 -o /tmp/qr.png <<EOF
BCD
001
1
SCT
$bic
$name
$iban
$currency$amount
CHAR

$message
EOF
nsxiv /tmp/qr.png