#!/bin/sh

usage(){
    echo "Usage: $(basename $0) [-h] [-s] [-c]
    -s: Turn on laptop display
    Otherwise turn on external display
    -c: Start compositor
    Otherwise turn off compositor"
}

SMALLDISPLAY=false
COMPOSITOR=false

while getopts 'hsc' c
do
    case $c in
        h) usage; exit ;;
        s) SMALLDISPLAY=true ;;
        c) COMPOSITOR=true ;;
    esac
done

shift $((OPTIND-1))

if [ $COMPOSITOR = true ]
then
    # start compositor
    picom --config ~/.config/picom/picom.conf &
else
    # kill compositor, this is recommended when turning on the external screen as it may cause problems otherwise
    killall picom
fi

if [ $SMALLDISPLAY = false ]
then
    # turn on big display
    xrandr --output HDMI-1-0 --left-of eDP-1 --auto
    #turn off laptop display
    xrandr --output eDP-1 --off
else
    #turn on laptop display
    xrandr --output eDP-1 --left-of HDMI-1-0 --auto
    # turn off external display
    xrandr --output HDMI-1-0 --off
fi