###################################################################
# This is a port (if you could call it that) of the php Blackbox 
# background script to Python. Got to start somewhere don't I?
#
# At the command line, different aguments can be passed to get some 
# different behaviour. The list is below...
#	-m=#		For multiple desktops where # is the number of 
#				desktops to display
#	-o			Just choose an image at random and exit. No desktop 
#				slideshow.
#	-s			Scales the image ignoring aspect ratio
###################################################################

# Let's import the things we know we will need
import dircache, time, commands, sys
import getopt, random, re, types
# import wx

###################################################################
# As the name implies, show usage information for the script
def usage():
  print 'Command line parameters for bb_bg.'
  print '-o = image		Display the selected image and exit.'
  print '-s			Scales the image ignoring aspect ratio.'
  print '-v			A verbose option. Dumps wmsetbg error messages.'
  print '-u			Print this usage message.'
  print '-i			Interval for slide show.'
  print
###################################################################


###################################################################
# As this is starting to get rather messy, perhaps we should put 
# command line arg processing section in a function
def proc_args(options):
  print options
  for o, a in options:
	print o
  print 'You\'re an idiot!'
  sys.exit()
###################################################################


# Vars and things
big_list = list()
directories = list()
verbose = str()
just_one = str()
rand_desk = str()
interv = 30.0


# Grab the command line arguments
for arg in sys.argv: 
    print arg


try:
  # We aren't using any long options so this is fine
  opts, args = getopt.getopt(sys.argv[1:], "i:o:su")
except getopt.GetoptError:
  # print help information and exit:
  usage()
  sys.exit(2)


# proc_args(opts)
# sys.exit()


# Process command line arguments
for o, a in opts:
  if o == "-i":
	interv = a
	interv=float(interv)		# The argument comes in as a string so we need to convert to a float
  if o == "-v":
	verbose = True
  if o == "-u":
	usage()
	sys.exit()
  if o in ("-h", "--help"):
	usage()
	sys.exit()
  if o in ("-o", "--output"):
	item = a
  if o == "-s":
	keep_aspect = False
  if o == "-o":
	just_one = True


# If the user just want's to set the background,
if just_one == True:
  commands.getoutput('wmsetbg -a %s' % (item))
  sys.exit()

# We want to open the config file 
for line in file("/home/big/.bb_bg"):
  print line
  line = line.strip()
  fields = line.split("]") # needs 2.2.2 or higher
  for entry in fields:
	directories.append(entry)


# Well, the first thing I want to do here is just open a directory
for dis in directories:
  images = dircache.listdir(dis)
  # Loop through the directories and put their contents into a list
  for item in images:
	item_tmp = item.lower()
	if item_tmp.find('.jpeg') == -1 and item_tmp.find('.png') == -1 and item_tmp.find('.gif') == -1 and item_tmp.find('.jpg') == -1:
		continue
	num = random.randrange(1, 60)
	big_list.append(item)
# Loop end. Damn! That was easy!


# Shuffle the list
random.shuffle(big_list)


# That done, iterate continously over the lists, with delays of course, 
# showing the backgrounds
while 1:
	for item in big_list:
	  # print out the name of the image, should we want to see, and 
	  # execute wmsetbg here
	  print item
	  out = commands.getoutput('wmsetbg -a %s' % (item))
	  print out
	  if interv > 0:
		time.sleep(interv)
	  else:
		time.sleep(10)
# end loop #