#!/bin/bash

declare -i sinks_count=`pacmd list-sinks | grep -c index:[[:space:]][[:digit:]]`

if [ $sinks_count -eq 0 ] ; then
    exit
fi

declare -i active_sink_index=`pacmd list-sinks | sed -n -e 's/\*[[:space:]]index:[[:space:]]\([[:digit:]]\)/\1/p'`

echo "Active sink: $active_sink_index"

active_index_position_found=0
let next_sink_index=-1
while read index ;
do
    declare -i ind=($(echo $index | tr -dc '[0-9]+'))
    echo "ind: $ind"
    if [ $next_sink_index -lt 0 ] ; then
        export next_sink_index=$ind
    fi
    if [ $active_index_position_found -eq 1 ] ; then
        export next_sink_index=$ind
        break;
    fi
    if [ $active_sink_index -eq $ind ] ; then
        export active_index_position_found=1
    fi
done < <(pacmd list-sinks | grep index:[[:space:]][[:digit:]])

#change the default sink
pacmd "set-default-sink ${next_sink_index}"

#move all inputs to the new sink
for app in $(pacmd list-sink-inputs | sed -n -e 's/index:[[:space:]]\([[:digit:]]    \)/\1/p');
do
    pacmd "move-sink-input $app $next_sink_index"
done

#display notification
declare -i ndx=0
pacmd list-sinks | sed -n -e 's/device.description[[:space:]]=[[:space:]]"\(.*\)"/\1/p' | while read line;
do
    if [ $next_sink_index -eq $ndx ] ; then
        #notify-send -i notification-audio-volume-high "Sound output switched to"     "$line"
        notify-send "Sound output switched" "$line"
        exit
    fi
    ndx+=1
done;