"""IRC plugin for retrieval of facts."""

import logging

from irc.client import NickMask

from ircbot.lib import Plugin, has_permission
from facts.models import Fact, FactCategory


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


class Facts(Plugin):

    """Present facts to IRC."""

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

        self.connection.reactor.add_global_regex_handler(['pubmsg', 'privmsg'], r'^!facts\s+add\s+(\S+)\s+(.*)$',
                                                         self.handle_add_fact, -20)
        self.connection.reactor.add_global_regex_handler(['pubmsg', 'privmsg'], r'^!facts\s+(\S+)(\s+(.*)$|$)',
                                                         self.handle_facts, -20)

        super(Facts, self).start()

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

        self.connection.reactor.remove_global_regex_handler(['pubmsg', 'privmsg'], self.handle_add_fact)
        self.connection.reactor.remove_global_regex_handler(['pubmsg', 'privmsg'], self.handle_facts)

        super(Facts, self).stop()

    def handle_facts(self, connection, event, match):
        """Respond to the facts command with desired fact."""

        category = match.group(1)
        regex = None
        if match.group(2) != '':
            regex = match.group(3)

        fact = Fact.objects.random_fact(category, regex)
        if fact:
            if fact.category.show_source:
                nick = NickMask(fact.nickmask).nick
                msg = "{0:s} ({1:s})".format(fact.fact, nick)
            else:
                msg = fact.fact

            return self.bot.reply(event, msg)

    def handle_add_fact(self, connection, event, match):
        """Add a new fact to the database."""

        category_name = match.group(1)
        fact_text = match.group(2)

        if has_permission(event.source, 'facts.add_fact'):
            # create the category
            category, created = FactCategory.objects.get_or_create(name=category_name)
            fact = Fact.objects.create(fact=fact_text, category=category, nickmask=event.source)
            if fact:
                return self.bot.reply(event, "fact added to {0:s}".format(category.name))


plugin = Facts