# Countdown - track and display time until events
# 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
from datetime import datetime

from dateutil.parser import *
from dateutil.relativedelta import *
from dateutil.tz import *
from irclib import irclib

from Module import Module

# Class that adds a countdown item to the bot

class Countdown(Module):

    def register_handlers(self, server):
        server.add_global_handler('pubmsg', self.on_pubmsg)
        server.add_global_handler('privmsg', self.on_privmsg)

    def unregister_handlers(self):
        self.server.remove_global_handler('pubmsg', self.on_pubmsg)
        self.server.remove_global_handler('privmsg', self.on_privmsg)

    def do(self, connection, event, nick, userhost, replypath, what, admin_unlocked):
        whats = what.split(' ')
        if whats[0] == 'countdown' and len(whats) >= 2:
            if whats[1] == 'add' and len(whats) >= 4:
                item = whats[2]
                target = parse(' '.join(whats[3:]), default=datetime.now().replace(tzinfo=tzlocal()))
                if not self.config.has_section('countdown'):
                    self.config.add_section('countdown')

                self.config.set('countdown', item, target.astimezone(tzutc()).isoformat())
                replystr = 'added countdown item ' + whats[2]
                return self.reply(connection, replypath, replystr)
            elif whats[1] == 'remove':
                try:
                    if self.config.remove_option('countdown', whats[2]):
                        replystr = 'removed countdown item ' + whats[2]
                        return self.reply(connection, replypath, replystr)
                except NoSectionError: pass
            elif whats[1] == 'list':
                try:
                    cdlist = self.config.options('countdown')
                    cdlist.remove('debug')
                    cdlist.sort()
                    liststr = ', '.join(cdlist)
                    return self.reply(connection, replypath, liststr)
                except NoSectionError: pass
            else:
                try:
                    timestr = self.config.get('countdown', whats[1])
                    time = parse(timestr)
                    rdelta = relativedelta(time, datetime.now().replace(tzinfo=tzlocal()))
                    relstr = whats[1] + ' will occur in '
                    if rdelta.years != 0:
                        relstr += str(rdelta.years) + ' years '
                    if rdelta.months != 0:
                        relstr += str(rdelta.months) + ' months '
                    if rdelta.days != 0:
                        relstr += str(rdelta.days) + ' days '
                    if rdelta.hours != 0:
                        relstr += str(rdelta.hours) + ' hours '
                    if rdelta.minutes != 0:
                        relstr += str(rdelta.minutes) + ' minutes '
                    if rdelta.seconds != 0:
                        relstr += str(rdelta.seconds) + ' seconds'
                    return self.reply(connection, replypath, relstr)
                except NoOptionError: pass

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