#!/bin/bash

# gn logout script
# call gn to update all packages and make computer go sleepy
# if theres a song playing let that bad boy finish out

set -e

performUpdates() {
    echo "Updating packages before we go."
    sudo pacman -Syu --noconfirm && yay -Sua
}

pingForSongChanges() {
    # https://gist.github.com/red-noise/9789642
    title=""
    pingForChanges=true
    while $pingForChanges
    do
        now_title=`dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'Metadata'|egrep -A 1 "title"|egrep -v "title"|cut -b 44-|cut -d '"' -f 1|egrep -v ^$`
        if [[ "$title" == "" ]]
        then
            title="$now_title"
        fi
        if [ "$now_title" != "$title" ]
        then
            pingForChanges=false
        fi
        sleep 1
    done
}

performUpdates
pid=$!
wait $pid
status=`dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'PlaybackStatus' | grep -Ev "^method" | sed -e 's/"//g' | sed -e 's/   variant       string //g'`
if [[ "$status" == "Playing" ]]
then
    echo "Looks like you're still listening, let's finish out this song before we go."
    pingForSongChanges
    echo ""
    echo "Alright, time to head out."
fi
echo ""
echo "Completed installing all available updates, shutting down in three seconds. Press Ctrl+C to cancel."
sleep 3
echo ""
echo "Goodnight."
shutdown -h now