#!/bin/bash

if test -z "$1"; then
	echo "usage: test_card_scanner_count <count>" >&2
	exit 1
fi

STORAGE_DIR="$HOME/.local/share/sevenkeys/testimages/"
mkdir -p "$STORAGE_DIR"

starting_file_count="$(find $STORAGE_DIR/*.png | wc -l)"

echo "test_card_scanner_count: Beginning test"
while true; do
	rng="$(cat /dev/random | tr -cd 'a-f0-9' | head -c 32)"
	filename="$STORAGE_DIR/$rng.png"

	scanimage --output-file="$filename" --source "ADF Front" --mode Color --page-width 63mm --page-height 88mm 2>/dev/null

	# scanimage exits with code 7 if no documents are available in scanner
	if test $? -eq 7; then
		echo "test_card_scanner_count: No more cards in feeder" >&2
		rm "$filename"
		break
	fi
done

ending_file_count="$(find $STORAGE_DIR/*.png | wc -l)"

if test $(( ending_file_count - starting_file_count )) -ne "$1"; then
	echo "FAILED: Start: $starting_file_count, End: $ending_file_count"
else
	echo "SUCCESS"
fi