#!/bin/sh

. slib

help() {
cat << EOF
${0}: Wrapper script to change volume
options:
 -i [Vol]        Increase volume by Vol
 -d [Vol]        Decrease volume by Vol
 -s [Vol]        Set volume to Vol
 -p              Show the current volume
 -t              Toggle between mute and unmute
 -h              Print this message and exit
EOF

exit 0
}

check_program "pactl" "pulseaudio must be installed"

[ $# != 1 ] && [ $# != 2 ] && invalid_use

while getopts "i:d:s:pth" option; do
	case "${option}" in
	i) run --reload-status "pactl set-sink-volume @DEFAULT_SINK@ +${OPTARG}%" ;;

	d) run --reload-status "pactl set-sink-volume @DEFAULT_SINK@ -${OPTARG}%" ;;

	s) run --reload-status "pactl set-sink-volume @DEFAULT_SINK@ ${OPTARG}%" ;;

	t) run --reload-status "pactl set-sink-mute @DEFAULT_SINK@ toggle" ;;

	p)
		if ! pactl get-sink-volume @DEFAULT_SINK@ \
			| sed -e 's,.* \([0-9][0-9]*\)%.*,\1,' | head -n1 2>/dev/null; then
			err "Failed to get current volume"
		else
			exit 0
		fi
	;;
	h) help ;;

	*) invalid_use -h ;;

	esac
done

# Unreachable
invalid_use