#!/bin/bash

# This is a simple program that toggles an external monitor on and off
# using xrandr.

# This program won't work out of the box. You will have to rename the variables
# $Internal and $External to suit your needs.

# i3-xrandr-toggle - A simple xrandr toggle addon
# Copyright (C) 2017 Fabrizio Romano Genovese <egonigredo@gmail.com>

# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.

# You should have received a copy of the
# GNU General Public License along with this program; if not, 
# see <http://www.gnu.org/licenses/>

# Put this file in /bin/ or in /usr/bin. Do not forget to give 
# sudo chmod +x i3-xrandr-toggle
# to make it executable.

version=1.0

if [[ "$#" -ge 2 ]]; then
        echo "Usage: $0 {-v, --version | -h --help}"
        exit 2
elif [[ "$#" -eq 1 ]]; then
        case $1 in
        -v | --version)
                echo "$0 - Version $version"
                exit 0;;
        -h | --help)
                echo "This is a simple program that toggles an external monitor on and off using xrandr. This program won't work out of the box. You will have to rename the variables \$Internal and \$External in the script to suit your needs."
                echo "- v, --version            Display current version"
                echo "-h, --help                Display this message"
                exit 0;;
        *)
                echo "Usage: $0 {-v, --version | -h, --help}"
                exit 2;;
        esac
fi


Internal="eDP1"
External="DP1-3"

# Grep current external monitor status. Do noting if not connected

if xrandr | grep "DP1-3 connected" > /dev/null; then

# Check if the program has been used before. If yes, reads previous 
# Status from a file. If not, initialises the variables.

	if [ ! -f "/tmp/monitor_mode.dat" ]; then
		monitor_mode="ON"

	else
		monitor_mode=`cat /tmp/monitor_mode.dat`
	fi

	
	if [ $monitor_mode = "OFF" ]; then
		monitor_mode="ON"
		xrandr -d :0.0 --output $External --auto
		xrandr -d :0.0 --output $Internal --auto
		xrandr -d :0.0 --output $External --right-of $Internal

# Reloads background if using feh

                if [ -a "/bin/feh" ]; then
                ~/.fehbg
                fi

	else 
		monitor_mode="OFF"
		xrandr -d :0.0 --output $External --off 
		xrandr -d :0.0 --output $Internal --auto
	fi	

# Rewrites the file for the next use.

	echo "${monitor_mode}" > /tmp/monitor_mode.dat


fi