#!/bin/bash

# config structures
declare -A			\
	destinationchannels	\
	destinationfat32compat	\
	destinationcopymime	\
	destinationformat	\
	destinationfrequency	\
	destinationid		\
	destinationloss		\
	destinationmaxbps	\
	destinationnormalize	\
	destinationpath		\
	destinationquality	\
	destinationrename	\
	destinationnoresample	\
	destinationrenamepath	\
	destinationskipmime	\
|| {
	echo "Check your Bash version. You need >= 4.0" >&2
	exit $EBASHVERS
}

declare -r				\
	DOCDIR=./doc			\
	LIBDIR=./lib			\
	SHAREDIR=./share
declare -r				\
	exampleconf=$DOCDIR/example.cfg	\
	schema=$SHAREDIR/schema.sql	\
					\
	oldIFS="$IFS"

LC_ALL=C

shopt -s extglob

for function in "$LIBDIR"/*/*
do
	source "$function"
done

while getopts 'urn' opt
do
	case $opt in
		u)	update=1	;;
		r)	rename=1	;;
		n)	pretend=1	;;
	esac
done

getConfig

openDatabase

(( update )) && getFiles

echo '
	SELECT
		source_files.id,
		source_files.filename,
		mime_types.mime_text
	FROM
			source_files
	INNER JOIN	mime_types
		ON	source_files.mime_type = mime_types.id
	;
	SELECT	"AtOM:NoMoreFiles";
' >&3
renameFile() {
	echo $'\t'"${filename%.*}$extension"
	if ! (( pretend ))
	then
		mv "$sourcepath/$filename" "$sourcepath/${filename%.*}$extension"
		Update source_files filename "${filename%.*}$extension"
	fi
}

while read -u4 line
do
	if [[ $line == AtOM:NoMoreFiles ]]
	then
		break
	fi
	fileid=${line%%|*}
	rest="${line#*|}|"
	filename=${rest%%|*}
	rest=${rest#*|}
	mimetype=${rest%%|*}
	rest=${rest#*|}
	case "$mimetype" in
		'audio/mpeg')
			if [[ ${filename##*.} != mp3 ]]
			then
				extension=.mp3
				echo "$filename: MP3 ($extension)"
				(( rename )) && renameFile
			fi
		;;
		'application/ogg vorbis')
			if [[ ${filename##*.} != ogg ]]
			then
				extension=.ogg
				echo "$filename: Ogg Vorbis ($extension)"
				(( rename )) && renameFile
			fi
		;;
		'application/ogg opus')
			if [[ ${filename##*.} != opus ]]
			then
				extension=.opus
				echo "$filename: Opus ($extension)"
				(( rename )) && renameFile
			fi
		;;
		'audio/x-flac')
			if [[ ${filename##*.} != flac ]]
			then
				extension=.flac
				echo "$filename: FLAC ($extension)"
				(( rename )) && renameFile
			fi
		;;
	esac
done

closeDatabase