"""
Urls - store urls, retrieve urls, even track some maybe
Copyright (C) 2010  Brian S. Stephan

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, see <http://www.gnu.org/licenses/>.
"""

from ConfigParser import NoOptionError
import os
import random
import re

from extlib import irclib

from Module import Module

class Urls(Module):
    """Track URLs and allow one to be returned randomly or searched for."""

    def do(self, connection, event, nick, userhost, what, admin_unlocked):
        """Search for a URL from the store, or return a random one, or add one."""

        whats = what.split(' ')
        if whats[0] == "!url":
            try:
                filename = self.config.get(self.__class__.__name__, 'urlfile')

                # check file
                if os.path.isfile(filename):
                    # try special commands like add
                    if len(whats) > 1:
                        if whats[1] == "add" and len(whats) > 2:
                            with open(filename, 'a') as file:
                                urlstr = ' '.join(whats[2:]) + "\n"
                                file.write(urlstr)

                            return 'added url'

                    # default: get a random url

                    # http://www.regexprn.com/2008/11/read-random-line-in-large-file-in.html
                    with open(filename, 'r') as file:
                        urls = []
                        if len(whats) == 1:
                            urls = file.readlines()
                        else:
                            lines = file.readlines()
                            for line in lines:
                                # check if line matches provided regex
                                if re.search(' '.join(whats[1:]), line, re.IGNORECASE) is not None:
                                    urls.append(line)
                    if len(urls) > 0:
                        to_print = urls[random.randint(1, len(urls))-1]

                        # return text
                        return to_print.rstrip()
                else:
                    print('filename in config file for urls is wrong')
            except NoOptionError: pass

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