"""
dr.botzo - a pluggable IRC bot written in Python
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 ConfigParser, NoSectionError, NoOptionError
import os
import re
import socket
import sys
import inspect

from extlib import irclib

from modules import *

modlist = []
moduleList = [ "Countdown", "Dice", "IrcAdmin", "GoogleTranslate", "Seen", "FactFile" ]
modObjs = []

class DrBotServerConnection(irclib.ServerConnection):
    """Subclass irclib's ServerConnection, in order to expand privmsg."""

    def privmsg(self, target, text):
        """Send a PRIVMSG command."""
        splitter = "..."

        # split messages that are too long. Max length is 512.
        # TODO: this does not properly handle when the hostname has been
        # masked by the ircd
        space = 512 - len('\r\n') - len('PRIVMSG ') - len(' :') - len(target) - len(self.nickname) - len('!') - len(self.username) - len('@') - len(socket.getfqdn())
        splitspace = space - (len(splitter) + 1)

        if len(text) > space:
            while len(text) > splitspace:
                splitpos = text.rfind(' ', 0, splitspace)
                splittext = text[0:splitpos] + ' ' + splitter
                text = splitter + ' ' + text[splitpos+1:]
                self.send_raw("PRIVMSG %s :%s" % (target, splittext))

            # done splitting
            self.send_raw("PRIVMSG %s :%s" % (target, text))
        else:
            self.send_raw("PRIVMSG %s :%s" % (target, text))

class DrBotIRC(irclib.IRC):
    """Subclass irclib's IRC, in order to create a DrBotServerConnection."""

    def server(self):
         c = DrBotServerConnection(self)
         self.connections.append(c)
         return c

# read config file

config = ConfigParser({'debug': 'false'})
config.read([os.path.expanduser('~/.dr.botzo.cfg'), 'dr.botzo.cfg'])

# load necessary options
try:
    # load connection info
    botserver   = config.get('IRC', 'server')
    botport     = config.getint('IRC', 'port')
    botnick     = config.get('IRC', 'nick')
    botircname  = config.get('IRC', 'name')
except NoSectionError as e:
    sys.exit("Aborted due to error with necessary configuration: " + str(e))
except NoOptionError as e:
    sys.exit("Aborted due to error with necessary configuration: " + str(e))

# load additional options
irclib.DEBUG = config.getboolean('IRC', 'debug')

# start up the IRC bot

# create IRC and server objects and connect
irc = DrBotIRC()
server = irc.server().connect(botserver, botport, botnick, botircname)

# load features
try:
    cfgmodlist = config.get('modules', 'modlist')

    mods = cfgmodlist.split(',')
    for mod in mods:
        # try to load each module
        eval(mod + '.' + mod + '(config, server, modlist)')
except NoSectionError as e:
    print("You seem to be missing a modules config section, which you probably wanted.")
except NoOptionError as e:
    print("You seem to be missing a modlist config option, which you probably wanted.")

# loop forever
irc.process_forever()

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