#!/bin/bash -e

DUNSTIFY='dunstify -t 1000 -a changeVolume -u low'
DUNSTIFYVOL="$DUNSTIFY -i audio-volume-high"

SINK='@DEFAULT_AUDIO_SINK@'
WPCUR="$(wpctl get-volume "$SINK")"
CUR="$((10#$(tr -dc '0-9' <<< "$WPCUR")))"

grep -q MUTED <<< "$WPCUR" && MUTE=1 || MUTE=0

if [ "$1" == 'm' ]; then
    if [ "$MUTE" = 1 ]; then
        wpctl set-mute "$SINK" 0
        $DUNSTIFYVOL -h string:x-dunst-stack-tag:vol -h int:value:"$CUR" "$CUR%"
    else
        wpctl set-mute "$SINK" 1
        $DUNSTIFY -i audio-volume-muted -h string:x-dunst-stack-tag:vol "Mute"
    fi
else
    case "${1:0:1}" in
        '')      echo "$CUR"; exit              ;;
        '+'|'-') CUR="$((CUR - CUR % $1 + $1))" ;;
        *)       CUR="$1"                       ;;
    esac

    wpctl set-volume -l 1.5 "$SINK" "$CUR%"
    if [ "$MUTE" = 1 ]; then
        wpctl set-mute "$SINK" 0
    fi
    $DUNSTIFYVOL -h string:x-dunst-stack-tag:vol -h int:value:"$CUR" "$CUR%"
fi

# update sbar
kill -35 "$(cat "$HOME/.cache/pidofbar")"