#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#  SSnR.py
#
#  Copyright 2017 Rémi BERTHO <remi.bertho@dalan.fr>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#  MA 02110-1301, USA.
#
#

import sys
import getopt
import regex

def main(args):
	"""
	Main function
		:param args: Main arguments
	"""
	try:
		opts, args = getopt.getopt(args, "hr:s:", ["regex=", "string=", "help"])
	except getopt.GetoptError as err:
		print(err)
		print_help()
		return 2

	string = ""
	ex = ""

	for opt, arg in opts:
		if opt in ("-h", "--help"):
			print_help()
			return 0
		elif opt in ("-r", "--regex"):
			ex = arg
		elif opt in ("-s", "--string"):
			string = arg

	if (string == "") or (ex == ""):
		print_help()
		return -2

	search(ex, string)
	return 0

def search(ex, string):
	"""
	Search in a string
		:param ex: regular expression
		:param string: a string
	"""
	regex_compile = regex.compile(ex, regex.MULTILINE)
	if regex_compile is None:
		return -1
	ite = regex_compile.finditer(string)
	nb_match = 0
	for match in ite:
		nb_match += 1
		print(" - Found \"" + match.group(0) + "\" at [" + str(match.start(0)) +
		      ":" + str(match.end(0)) + "]")
	print("Number of match: " + str(nb_match))

def print_help():
	print('SSnR.py -s <string> -r <regex>')


if __name__ == '__main__':
	sys.exit(main(sys.argv[1:]))