import logging

from ircbot.lib import Plugin, is_admin, reply_destination_for_event
from ircbot.models import IrcChannel


log = logging.getLogger('ircbot.lib')


class ChannelManagement(Plugin):

    """Have IRC commands to do IRC things (join channels, quit, etc.)."""

    def start(self):
        """Set up the handlers."""

        self.connection.reactor.add_global_regex_handler('pubmsg', r'^!join\s+([\S]+)',
                                                         getattr(self, 'handle_join'), -20)
        self.connection.reactor.add_global_regex_handler('privmsg', r'^!join\s+([\S]+)',
                                                         getattr(self, 'handle_join'), -20)

        self.connection.reactor.add_global_regex_handler('pubmsg', r'^!part\s+([\S]+)',
                                                         getattr(self, 'handle_part'), -20)
        self.connection.reactor.add_global_regex_handler('privmsg', r'^!part\s+([\S]+)',
                                                         getattr(self, 'handle_part'), -20)

        self.connection.reactor.add_global_regex_handler('pubmsg', r'^!quit\s*(.*)',
                                                         getattr(self, 'handle_quit'), -20)
        self.connection.reactor.add_global_regex_handler('privmsg', r'^!quit\s*(.*)',
                                                         getattr(self, 'handle_quit'), -20)

        super(ChannelManagement, self).start()

    def stop(self):
        """Tear down handlers."""

        self.connection.reactor.remove_global_regex_handler('pubmsg', getattr(self, 'handle_join'))
        self.connection.reactor.remove_global_regex_handler('privmsg', getattr(self, 'handle_join'))

        self.connection.reactor.remove_global_regex_handler('pubmsg', getattr(self, 'handle_part'))
        self.connection.reactor.remove_global_regex_handler('privmsg', getattr(self, 'handle_part'))

        super(ChannelManagement, self).stop()

    def handle_join(self, connection, event, match):
        """Handle the join command."""

        dest = reply_destination_for_event(event)

        if is_admin(event.source):
            channel = match.group(1)
            # put it in the database if it isn't already
            chan_mod, c = IrcChannel.objects.get_or_create(name=channel)
            log.debug(u"joining channel %s", channel)
            self.connection.join(channel)
            self.bot.privmsg(dest, "Joined channel {0:s}.".format(channel))

    def handle_part(self, connection, event, match):
        """Handle the join command."""

        dest = reply_destination_for_event(event)

        if is_admin(event.source):
            channel = match.group(1)
            # put it in the database if it isn't already
            chan_mod, c = IrcChannel.objects.get_or_create(name=channel)
            log.debug(u"parting channel %s", channel)
            self.connection.part(channel)
            self.bot.privmsg(dest, "Parted channel {0:s}.".format(channel))

    def handle_quit(self, connection, event, match):
        """Handle the join command."""

        if is_admin(event.source):
            self.bot.die(msg=match.group(1))


plugin = ChannelManagement