#!/usr/bin/env python
# Location Bot
#
# Douglas Thrift
#
# $Id$

from ConfigParser import NoOptionError, SafeConfigParser
import getpass
import ircbot
import irclib
import sys
import warnings

class LocationBot(ircbot.SingleServerIRCBot):
	def __init__(self):
		config = SafeConfigParser({'hostname': ''})

		config.read('locationbot.ini')

		try:
			nick = config.sections()[0]
		except IndexError:
			sys.exit('No nick configured')

		servers = []

		try:
			for server in config.get(nick, 'servers').split():
				server = server.split(':', 2)

				if len(server) == 1:
					servers.append((server[0], 6667))
				else:
					host = server[0]
					port = int(server[1])
					ssl = server[1].startswith('+')

					if len(server) == 3:
						servers.append((host, port, ssl, server[2]))
					else:
						servers.append((host, port, ssl))

			self.__admins = config.get(nick, 'admins').split()
			self.__channels = config.get(nick, 'channels').split()
			self.__hostname = config.get(nick, 'hostname')
		except NoOptionError, error:
			sys.exit(error)

		ircbot.SingleServerIRCBot.__init__(self, servers, nick, 'Location Bot')

	def __admin(self, nick):
		if isinstance(nick, irclib.Event):
			nick = nick.source()

		for admin in self.__admins:
			if irclib.mask_matches(nick, admin):
				return True

		return False

	def __command(self, connection, event):
		nick = irclib.nm_to_n(event.source())

		try:
			command, arguments = event.arguments()[0].split(None, 1)
		except ValueError:
			command = event.arguments()[0].strip()
			arguments = ''

		if command.startswith('!'):
			command = command[1:]

			if command == 'help':
				commands = [
					('help', 'show this help message'),
				]

				if self.__admin(event):
					commands += [
						('reload', 'reload my code'),
					]

				for command in commands:
					connection.privmsg(nick, '!%-7s %s' % command)
			elif self.__admin(event):
				if command == 'reload':
					raise Reload
				else:
					self.__unknown(connection, nick, command)
			else:
				self.__unknown(connection, nick, command)
		elif event.eventtype() == 'privmsg':
			self.__unknown(connection, nick, command)

	def __unknown(self, connection, nick, command):
		connection.privmsg(nick, 'unknown command (%s); try "!help"' % command)

	def _connect(self):
		password = None

		if len(self.server_list[0]) != 2:
			ssl = self.server_list[0][2]

		if len(self.server_list[0]) == 4:
			password = self.server_list[0][3]

		try:
			with warnings.catch_warnings():
				warnings.filterwarnings('ignore', r'socket\.ssl\(\) is deprecated\.  Use ssl\.wrap_socket\(\) instead\.', DeprecationWarning)
				self.connect(self.server_list[0][0], self.server_list[0][1], self._nickname, password, getpass.getuser(), self._realname, localaddress = self.__hostname, ssl = ssl)
		except irclib.ServerConnectionError:
			pass

	def get_version(self):
		return 'locationbot ' + sys.platform

	def on_nicknameinuse(self, connection, event):
		connection.nick(connection.get_nickname() + '_')

	def on_privmsg(self, connection, event):
		self.__command(connection, event)

	def on_pubmsg(self, connection, event):
		self.__command(connection, event)

	def on_welcome(self, connection, event):
		for channel in self.__channels:
			connection.join(channel)

class Reload(Exception):
	pass

if __name__ == '__main__':
	import os.path

	locationbot = LocationBot()

	try:
		while True:
			try:
				locationbot.start()
			except Reload:
				locationbot.connection.disconnect('Reloading')

				locationbot = __import__(os.path.splitext(os.path.basename(__file__))[0]).LocationBot()
	except KeyboardInterrupt:
		locationbot.connection.disconnect('Oh no!')