#!/bin/bash -e

case "$1" in
    s) DEV='@DEFAULT_AUDIO_SINK@' ;;
    m) DEV='@DEFAULT_AUDIO_SOURCE@' ;;
    *) exit 1 ;;
esac

function update_vol() {
    # shellcheck disable=SC2017
    case "$1" in
        +*|-*) CUR=$((CUR + $1 - CUR % $1 + CUR % $1 * 10 / $1 / 5 * $1)) ;;
            *) CUR="$1" ;;
    esac
    wpctl set-volume -l 3 "$DEV" "$CUR%"
}

read -r _ CUR MUTE < <(wpctl get-volume "$DEV")
CUR=$((10#${CUR/./}))

if [ -z "$2" ]; then
    echo "$CUR"
    exit
fi
if [ "$2" == 'm' ] && [ -z "$MUTE" ]; then
    wpctl set-mute "$DEV" 1
else
    if [[ "$2" =~ [0-9] ]]; then
        update_vol "$2"
    fi
    if [ -n "$MUTE" ]; then
        wpctl set-mute "$DEV" 0
    fi
fi

kill -34 "$(cat "$XDG_RUNTIME_DIR/sbar/pid")"