#!/usr/bin/python
# -*- coding: utf-8 -*-
# 	$Id: serialrename.py,v 1.5 2007/11/27 15:05:06 thierry Exp $	


#commentary:
#Rename the content of a directory
#+with incremental numbers
#+ for a specific extension file

import os
from optparse import OptionParser
import sys

parser = OptionParser()

parser.add_option("-d",
                  "--dir",
                  dest="rep",
                  help ="Input directory(with / at the end please)")
parser.add_option("-n",
                  "--name",
                  dest="nom",
                  default="file",
                  help ="optional:file name")
parser.add_option("-s",
                  "--start-number",
                  dest="startn",
                  default=101,
                  help ="optional:initial incremental number")
parser.add_option("-e",
                  "--ext",
                  dest="extension",
                  help ="file type - ex: jpg(without dot)")

(options, args) = parser.parse_args()

rep = options.rep
nom = options.nom
startn = int(options.startn)
extension = options.extension

if len(sys.argv) < 3:
    parser.error("Serialrename take at list 2 arguments\n you must specify options -d and -e")
else:
    try:
        dir_photos = os.listdir(rep)
        for i in dir_photos:
            if extension in i:
                new = rep + nom + str(startn) + "." + extension
                if new not in dir_photos:
                    print new
                    os.rename(rep + i, new)
                    startn += 1
                else:
                    print new, "new"
                    os.rename(rep + i, new + "new")
                    startn += 1
    except (IOError, TypeError):
        raise "Check the path of your dir - Have you forget the / at the end ?"