"""Show seen chatter data over IRC."""

import logging

from django.utils import timezone

import irc.client

from ircbot.lib import Plugin
from seen.models import SeenNick


log = logging.getLogger('seen.ircplugin')


class Seen(Plugin):

    """Track when people say things in public channels, and report on it."""

    def start(self):
        """Hook handler functions into the IRC library."""

        self.connection.add_global_handler('pubmsg', self.handle_seeing)

        self.connection.reactor.add_global_regex_handler(['pubmsg'], r'^!seen\s+(\S+)$', self.handle_seen)

        super(Seen, self).start()

    def stop(self):
        """Unhook handler functions into the IRC library."""

        self.connection.remove_global_handler('pubmsg', self.handle_seeing)

        self.connection.reactor.remove_global_regex_handler(['pubmsg'], self.handle_seen)

        super(Seen, self).stop()

    @staticmethod
    def handle_seeing(connection, event):
        """Track pubmsg/privmsg events."""

        userhost = event.source
        nick = irc.client.NickMask(event.source).nick
        where = event.target
        what = event.arguments[0]

        log.debug("userhost %s, nick %s, where %s, what '%s'", userhost, nick, where, what)

        # store the event. only learn events with real wheres
        if where:
            seen_nick, c = SeenNick.objects.get_or_create(nick=nick, channel=where)
            seen_nick.host = userhost
            seen_nick.what = what
            seen_nick.seen_time = timezone.now()
            seen_nick.save()

    def handle_seen(self, connection, event, match):
        """Report on when a nick was last seen in a channel."""

        query_nick = match.group(1)
        source = event.target

        log.debug("query nick %s, source %s", query_nick, source)

        try:
            seen_nick = SeenNick.objects.get(nick=query_nick, channel=source)
            local_time = timezone.localtime(seen_nick.seen_time).strftime('%Y-%m-%d %H:%M:%S %Z')
            return self.bot.reply(event, "last saw {0:s} in {1:s} at {2:s} saying '{3:s}'."
                                  "".format(seen_nick.nick, seen_nick.channel,
                                            local_time, seen_nick.what))
        except SeenNick.DoesNotExist:
            return self.bot.reply(event, "i have not seen {0:s} in {1:s}.".format(query_nick, source))


plugin = Seen