#!/usr/bin/env perl
use strict;
use warnings;
use 5.014;

chomp(my $sink=`pactl get-default-sink`);

sub get {
    if (`pactl get-sink-mute $sink` =~ /Mute: yes/) {
        'mute'
    }
    else {
        (`pactl get-sink-volume $sink` =~ /(\d+)%/)[0]
    }
}

if ($ARGV[0] eq 'get') {
    say get;
}
elsif ($ARGV[0] eq 'up') {
    my $get = get;
    system("pactl set-sink-mute $sink 0");
    if ($get eq 'mute') {
        exit;
    }
    elsif ($get <= 90) {
        system("pactl set-sink-volume $sink +10%");
    }
    elsif ($get < 100) {
        system("pactl set-sink-volume $sink 100%");
    }
}
elsif ($ARGV[0] eq 'down') {
    my $get = get;
    if ($get eq 'mute') {
        exit;
    }
    system("pactl set-sink-volume $sink -10%");
}
elsif ($ARGV[0] eq 'mute') {
    system("pactl set-sink-mute $sink toggle")
}
else {
    die "unknown command '$ARGV[0]'";
}