#!/bin/sh

wd="/nfs/homes/tischmid/repos/piscine"
if [ ! "$(pwd)" = "${wd}" ]; then
	echo "# Your current working directory is:"
	pwd
	echo "# But you must be in:"
	echo "${wd}"
fi

out_dir="./timoulinette"
count="0"

for file in $(find . | grep -v .git | grep '^\./c[[:digit:]][[:digit:]].*.c$'); do
	comment_start="$(( $(grep -n -m 1 '////' "${file}" | cut -f1 -d:) + 1))" || { echo "Could not extract comment start. Exiting"; exit 1; }
	comment_end="$(( $(grep -n -m 2 '////' "${file}" | tail -n1 | cut -f1 -d:) - 1))" || { echo "Could not extract comment end. Exiting"; exit 2; }

	if [ "${comment_start}" -lt 1 ]; then
		echo "Comment start ${comment_start} is smaller than 1. Exiting"
		continue
	elif [ "${comment_end}" -lt 1 ]; then
		echo "Comment start ${comment_end} is smaller than 1. Exiting"
		continue
	elif [ "${comment_end}" -le "${comment_start}" ]; then
		echo "Comment start ${comment_end} is smaller than or equal to comment end ${comment_start}. Exiting"
		continue
	elif [ "$(( ${comment_end} + 2 ))" -eq "${comment_start}" ]; then
		echo "Comment start ${comment_end} is 2 less than comment start ${comment_start}, which is probably an error. Exiting"
		continue
	fi

	out_dirpath="${out_dir}/$(dirname "${file}")"
	out_filepath="${out_dir}/$(echo "${file}" | sed 's/\.c$/_test.c/g')"
	mkdir -p "${out_dirpath}" || { echo "Could not create dir ${out_filepath}. Exiting"; exit 3; }
	sed -n "${comment_start},${comment_end}p" "${file}" > "${out_filepath}.tmp"
	diff "${out_filepath}.tmp" "${out_filepath}" >/dev/null
	if [ ! "${?}" = "0" ]; then
		count="$((count + 1))"
	fi
	mv "${out_filepath}.tmp" "${out_filepath}"
done

printf '\033[32m%s\033[m\n' "Done, changed ${count} files"