#!/bin/sh

inFile=""
I='false'
outFile="film.mkv"
idA=1
A='false'
idS=2
S='false'
quiet='false'
cmd=""

while getopts 'hi:a:s:o:q' flag; do
    case "${flag}" in
	h) echo "permet de transcoder un fichier mkv dts to ac3"
	   echo "et de supprimer les accents des sous-titres"
	   echo "options:"
	   echo "-h          montre l\'aide"
           echo "-a <id>     transcode le flux id en ac3"
	   echo "-s <id>     supprime les accents du flux de sous-titre id"
	   echo "-o <file>   nom de sortie"
           echo "-q          be quiet"
	   exit 0
	   ;;
	i) I='true'
           inFile="${OPTARG}"
           ;;
	a) idA="${OPTARG}"
           A='true'
           ;;
	s) idS="${OPTARG}"
           S='true'
           ;;
	o) outFile="${OPTARG}";;
	q) quiet='true';;
    esac
done

sedsub () {
cat $1 | sed 'y/áàâäçéèêëîïìôöóûùúüñÂÀÄÇÉÈÊËÎÏÔÖÙÜÑ/aaaaceeeeiiiooouuuunAAACEEEEIIOOUUN/'
}

if [ $I = 'false' ]; then
	echo "besoin d'un fichier en entrée"
	exit 1
fi

if [ $A = 'false' ] && [ $S = 'false' ]; then
	echo "rien à faire"
	exit 0
fi

cmd="mkvextract tracks $inFile"

if [ $A = 'true' ]; then
    cmd="$cmd $idA:audio.dts"
fi
if [ $I = 'true' ]; then
    cmd="$cmd $idS:sub.srt"
fi
if [ $quiet = 'true' ]; then
    cmd="$cmd -r /dev/null"
fi

$cmd

if [ $A = 'true' ]; then
    cmd="ffmpeg -i audio.dts -acodec ac3 -ac 6 -ar 48000 -ab 640k audio.ac3"
    if [ $quiet = 'true' ]; then
	cmd="$cmd -v quiet"
    fi
    $cmd
fi

if [ $S = 'true' ]; then
	sedsub sub.srt > subtitle.srt
fi

cmd="mkvmerge -o $outFile"

if [ $A = 'true' ]; then
    cmd="$cmd -A"
fi
if [ $I = 'true' ]; then
    cmd="$cmd -S"
fi

cmd="$cmd $inFile"

if [ $A = 'true' ]; then
    cmd="$cmd audio.ac3"
fi
if [ $I = 'true' ]; then
    cmd="$cmd subtitle.srt"
fi
if [ $quiet = 'true' ]; then
    cmd="$cmd -q"
fi

$cmd

rm -f audio.* sub*srt