#! /bin/bash
bgsDirectory="${HOME}/bgs/"
slideshow() {
	gsettings set org.cinnamon.desktop.background.slideshow slideshow-enabled "${1}"
}
setDirectory() {
	gsettings set org.cinnamon.desktop.background.slideshow image-source "directory:///${bgsDirectory}${1}"
}
setImage() {
	gsettings set org.cinnamon.desktop.background picture-uri "file:///${1}"
}
toggle(){
slideshowEnabled=$(gsettings get org.cinnamon.desktop.background.slideshow slideshow-enabled)
	if $slideshowEnabled; then
		slideshow false
		setImage "${bgsDirectory}/default.jpg"
	else
		slideshow true
		gsettings set org.cinnamon.desktop.background.slideshow image-source "directory:///${bgsDirectory}chsck/"
	fi
}

chooseRandom(){
	shopt -s nullglob
	files=("${1}"*)
	length=$((${#files[@]}))
	echo "length: ${length}"
	randomIndex=$(($RANDOM % $length))
	echo "random index: ${randomIndex}"
	setImage "${files[$randomIndex]}" 
}
slideshowOrRandom(){
if [ "$#" -gt 1 ]&&[ "$2" = r ]; then
	slideshow false
	chooseRandom "${bgsDirectory}${1}"
else
	slideshow true
	setDirectory "${1}"
fi
}
case $1 in
	c)
		slideshowOrRandom "chsck/" "$2"
		 ;;
	l)
		slideshowOrRandom "leics/" "$2"
		;;
	a)	
		slideshowOrRandom "art/" "$2"
		;;
	t)	toggle
		;;
	*)	slideshow false	
		setImage "${bgsDirectory}/default.jpg"
		;;
esac