#!/usr/bin/sh -e
# Turns a nested hierarchy of music files into a flat one

find "${1:-.}" -regex '.*\.\(mp3\|ogg\|wav\|aac\|wma\|flac\|alac\)' -type f | \
		while read line; do
				newline=$(echo $line | sed -E -e 's|[[:space:]]?-[[:space:]]?|_|g' \
																	 -e 's/  */ /g')

				o=$(echo -n $(dirname "$newline") | sed -e 's|\./||g' -e 's|/| - |g')

				first=$(echo -n $(basename "$newline") | cut -d " " -f 1)
				if $(echo $first | grep -Eq '^[0-9]+$'); then
						o="$o $(echo -n "- $first -")"
						num=2
				else
						o="$o -"
						num=1
				fi

				o="$o $(echo -n $(basename "$newline") | cut -d " " -f ${num}-)"
				cp -v "$line" "${2:-.}/$o"
		done