#!/bin/bash

###PARAMETERS
#subreddits, divide by space
SUBS="itookapicture gonewild"
#folder for image
FOLDER="/home/art/Pictures/bg"
#size of desktop
SIZE="1280x1024"
#front image size
FRONT_IMAGE="400x"

WIDTH=`echo $SIZE | cut -d "x" -f1`
HEIGHT=`echo $SIZE | cut -d "x" -f2`
DWIDTH=$((WIDTH * 2))
HWIDTH=$((WIDTH / 2))
DHEIGHT=$((HEIGHT * 2))
HHEIGHT=$((HEIGHT / 2))
FWIDTH=$((WIDTH / 4))
CROP="$((WIDTH))x$((HEIGHT))+$((HWIDTH))+$((HHEIGHT))"

SUBSNUM=`echo $SUBS | wc -w`
NUMBER=$[ ( $RANDOM % $SUBSNUM )  + 1 ]
SUB=`echo $SUBS | cut -d " " -f$NUMBER`

wget http://www.reddit.com/r/$SUB/.rss -O $FOLDER/sub.rss
cat $FOLDER/sub.rss | sed 's/i.img/\n&/g' | sed 's/./http:\/\/&/' | grep "i.imgur." > $FOLDER/tmp_file
MAX=`cat $FOLDER/tmp_file | wc -l`

PICNUM=$[ ($RANDOM % $MAX) + 1 ]
cat $FOLDER/tmp_file | sed -n $PICNUM'p' > $FOLDER/tmp_file

wget -i $FOLDER/tmp_file -O $FOLDER/front.jpg
cp $FOLDER/front.jpg $FOLDER/background.jpg
mogrify -modulate 25,0,100 -quality 96 $FOLDER/background.jpg
mogrify -resize $DWIDTH -quality 96 $FOLDER/background.jpg
mogrify -crop $CROP -quality 96 $FOLDER/background.jpg
mogrify -spread 15 -quality 96 $FOLDER/background.jpg
mogrify -blur 64 -quality 96 $FOLDER/background.jpg
mogrify -resize $FRONT_IMAGE -quality 94 $FOLDER/front.jpg
mogrify -bordercolor white -border 10 $FOLDER/front.jpg
composite -gravity center $FOLDER/front.jpg $FOLDER/background.jpg $FOLDER/rwp.jpg
#for fluxbox etc.
fbsetbg -u feh -f $FOLDER/rwp.jpg
#for gnome
gconftool-2 -t string -s /desktop/gnome/background/picture_filename $FOLDER/rwp.jpg