#!/usr/bin/env python3

import argparse, os, requests, sys

def fileDownloader(url, sender = False):
 if sender:
  os.makedirs(sender, exist_ok=True)
  filename = "%s/%s" % (sender, url.split('/')[-1])
 else:
  filename = url.split('/')[-1]
 if not os.path.isfile(filename):
  remote = requests.get(url, stream=True)
  with open(filename, 'wb') as outfile:
   for chunk in remote.iter_content(chunk_size=1024): 
    if chunk:
     outfile.write(chunk)
     outfile.flush()
 else:
  print("File %s already exists. Skipping.", file=sys.stderr)

def urlparse(url):
 if "/img/usr/" in url:
  return url
 if "/auswertung/pix/popup.php/" in url:
  return "http://www.planetromeo.com/img/usr/%s" % url[52:82]
 else:
  raise ValueError("%s is not a valid URL.")

if __name__ == "__main__":
 parser = argparse.ArgumentParser()
 parser.add_argument("url", type=str, nargs="+", help="photo URL as copied from message window")
 group = parser.add_mutually_exclusive_group()
 group.add_argument("-s", "--sender", type=str, help="name of the sender, puts images into subdirectory")
 group.add_argument("-g", "--get-urls", help="get URLs only, don't download", action="store_true")
 args = parser.parse_args()

 for url in args.url:
  try:
   purl = urlparse(url)
  except ValueError:
   print("%s is not a valid URL. Skipping." % url, file=sys.stderr)
  else:
   if args.get_urls:
    print(purl)
   elif args.sender:
    fileDownloader(purl, args.sender)
   else:
    fileDownloader(purl)