#!/bin/sh

# This script does the following:
#   Run by itself, set the wallpaper
#   If given a file, set that as the new wallpaper
#   If given a directory, recursively choose a random file in it.

# Location of the symlink to wallpaper image
bgloc="${XDG_DATA_HOME:-$HOME/.local/share}/background"

trueloc="$(readlink -f "$1")" &&
case "$(file --mime-type -b "$trueloc")" in
	image/* )
        ln -sf "$(readlink -f "$1")" "$bgloc"
        notify-send -i "$bgloc" "Changing wallpaper..."
        ;;
	inode/directory )
        randimg="$(find -L $trueloc -iregex '.*.\(jpg\|jpeg\|png\|gif\)' -type f | shuf -n 1)"
        echo $randimg
        ln -sf "$randimg" "$bgloc"
        notify-send -i "$bgloc" "Random Wallpaper chosen."
        ;;
	*)
        notify-send "Error" "Not a valid image."
        exit 1
        ;;
esac

# Use xwallpaper to set the background
xwallpaper --zoom "$bgloc"