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#!/bin/sh
set -e

DEFAULT_PROFILE="output:analog-stereo+input:analog-stereo"
HDMI_PROFILE="output:hdmi-stereo"

global=
focused=
hdmi=
reset=
while getopts fgHRh name; do
	case ${name} in
	g) 	global=1 ;;
	f) 	focused=1 ;;
	H) 	hdmi=1 ;;
	R)	reset=1 ;;
	h|?) 	printf "usage: %s [-gfhr]\n" "$(basename "$0")"
		printf "\n"
		printf "  -g \t(set default sink and switch global output)\n"
		printf "  -f \t(switch focused container output)\n"
		printf "  -h \t(switch card to HDMI profile)\n"
		printf "  -r \t(switch card to default profile)\n"
		printf "\n"
		printf "Needs swq(1) to work.\n"
		;;
	esac
done

if [ "$#" -lt 1 ]; then
	printf "global\nfocused\nhdmi_profile\nreset_profile\n" | menu | {
		read -r line
		case ${line} in
		global) 	exec "$0" -g ;;
		focused) 	exec "$0" -f ;;
		hdmi_profile)	exec "$0" -H ;;
		reset_profile) 	exec "$0" -R ;;
		esac
	}
fi

# returns the sink_id
select_sink()
{
	pactl list short sinks | awk '{print $2}' | menu
}

if [ -n "${global}" ]
then
	target_sink=$(select_sink)
	notify-send -a soundswitch "soundswitch: global" "switch to <i>${target_sink}</i>"
	# set new default sink
	pactl set-default-sink "${target_sink}"
	# move all sink-inputs to the new sink
	pactl list sink-inputs short | cut -f1 \
		| xargs -i pactl move-sink-input "{}" "${target_sink}"

elif [ -n "${focused}" ]
then
	# parse pid of currently focused container
	# then get the sink-inputs for it and parse the sink-input-id
	focused_binary=$(swq current con | jq -r '.pid' | xargs ps -o comm=)
	sink_input_id=$(printf "%s\n" "${focused_binary}" \
		| xargs pacmd list-sink-inputs \
			| tr '\n' '\r' \
			| perl -pe 's/[^\r]*index: ([0-9]+).+?application\.process\.binary = "([^\r]+)"\r.+?(?=index:|$)/\2=\1\r/g' \
			| tr '\r' '\n' \
			| grep "^{}" \
		| cut -d'=' -f2)
	[ -z "${sink_input_id}" ] && exit 1

	# select which sink to switch to
	target_sink=$(select_sink)
	[ -z "${sink_input_id}" ] && exit 1

	notify-send -a soundswitch "soundswitch: ${focused_binary}" "switch to <i>${target_sink}</i>"
        pacmd move-sink-input "${sink_input_id}" "${target_sink}"

elif [ -n "${hdmi}" ]
then
	target_card=$(pactl list short cards | awk '{print $2}' | menu)
	notify-send -a soundswitch "soundswitch: hdmi" "switch <i>${target_card}</i> to HDMI profile"
	pactl set-card-profile "${target_card}" ${HDMI_PROFILE}

elif [ -n "${reset}" ]
then
	target_card=$(pactl list short cards | awk '{print $2}' | menu)
	notify-send -a soundswitch "soundswitch: reset" "switch <i>${target_card}</i> to default profile"
	pactl set-card-profile "${target_card}" ${DEFAULT_PROFILE}

fi

exit $?