#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  collection-for FILE
		  collection-for -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message

		  FILE          the path of the file to get the collection for


		Say the collection of the given file, using the path of FILE.


		Examples:

		  Get "tils" for "src/en/tils/some-pt.md":

		    $ collection-for src/en/tils/some-pt.md
		    tils
	EOF
}


for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

. src/lib.sh


FILE="${1:-}"
eval "$(assert_arg "$FILE" 'FILE')"


# echo "${FILE#"$CONTENT_PREFIX"/}" | cut -d/ -f1
# echo "${FILE#"$CONTENT_PREFIX"/}" | awk '{
	# awk -F/ '$3 && $0=$2 { print; next } $0'

ATTEMPT="$(echo "${FILE#"$CONTENT_PREFIX"/}" | cut -d/ -f2-)"

if [ "$ATTEMPT" = 'index.html' ]; then
	echo articles
else
	NAME="$(echo "$ATTEMPT" | cut -d/ -f1)"
	collections | grep "$NAME"
fi