"""
FactFile - display facts from a flat file upon request
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 FactFile(Module):

    """Return a random fact/quote/whatever from one or more files."""

    def do(self, connection, event, nick, userhost, what, admin_unlocked):
        """Search for a fact, or return a random one."""

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

            # open file
            if os.path.isfile(filename):
                # http://www.regexprn.com/2008/11/read-random-line-in-large-file-in.html
                with open(filename, 'r') as file:
                    facts = []
                    if len(whats) == 1:
                        facts = 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:
                                facts.append(line)
                if len(facts) > 0:
                    to_print = facts[random.randint(1, len(facts))-1]

                    # return text
                    return to_print.rstrip()
            else:
                print('filename in config file for \'' + whats[0] + '\' is wrong')

        except NoOptionError: pass

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