#!/bin/bash

TRACK=1
FFMPEG="ffmpeg -hide_banner -nostdin -f s16le -i /dev/zero -codec libvorbis -loglevel warning"

while read -r line; do
	if [ -z "$ARTIST" ]; then
		ARTIST="$line"
	elif [ -z "$ALBUM" ]; then
		YEAR=$(echo "$line" | cut -f 1 -d ' ')
		ALBUM=$(echo "$line" | cut -f 1 -d ' ' --complement)
		mkdir -p "$ALBUM"
	elif [ -z "$GENRE" ]; then
		GENRE="$line"
	else
		LENGTH=$(echo "$line" | cut -f 1 -d ' ')
		TITLE=$(echo "$line" | cut -f -1 -d ' ' --complement)
		NUMBER=$(printf "%02d" $TRACK)
		FILE="$ALBUM/$NUMBER - $TITLE.ogg"

		if [ ! -f "$FILE" ]; then
			echo "$FILE"
			$FFMPEG -t "$LENGTH" "$FILE"
			vorbiscomment -w "$FILE" -t "TITLE=$TITLE"   \
						 -t "ARTIST=$ARTIST" \
						 -t "ALBUM=$ALBUM"   \
						 -t "GENRE=$GENRE"   \
						 -t "DATE=$YEAR"     \
						 -t "TRACKNUMBER=$NUMBER"
		fi

		let TRACK=$TRACK+1
	fi
done < $1