"""
Seen - track races and those racing them
Copyright (C) 2014  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/>.

"""

import re

from races.models import Race, Racer, RaceUpdate

from Module import Module


class Races(Module):

    """Track races and allow for logging updates."""

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

        self.irc.add_global_regex_handler(['pubmsg', 'privmsg'],
                                          r'^!race\s+(\S+)\s+join$',
                                          self.join)
        self.irc.add_global_regex_handler(['pubmsg', 'privmsg'],
                                          r'^!race\s+(\S+)\s+leave$',
                                          self.leave)
        self.irc.add_global_regex_handler(['pubmsg', 'privmsg'],
                                          r'^!race\s+(\S+)\s+start$',
                                          self.start)
        self.irc.add_global_regex_handler(['pubmsg', 'privmsg'],
                                          r'^!race\s+(\S+)\s+finish$',
                                          self.finish)
        self.irc.add_global_regex_handler(['pubmsg', 'privmsg'],
                                          r'^!race\s+(\S+)\s+update\s+(.*)$',
                                          self.update)

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

        self.irc.remove_global_regex_handler(['pubmsg', 'privmsg'],
                                             r'^!race\s+(\S+)\s+join$',
                                             self.join)
        self.irc.remove_global_regex_handler(['pubmsg', 'privmsg'],
                                             r'^!race\s+(\S+)\s+leave$',
                                             self.leave)
        self.irc.remove_global_regex_handler(['pubmsg', 'privmsg'],
                                             r'^!race\s+(\S+)\s+start$',
                                             self.start)
        self.irc.remove_global_regex_handler(['pubmsg', 'privmsg'],
                                             r'^!race\s+(\S+)\s+finish$',
                                             self.finish)
        self.irc.remove_global_regex_handler(['pubmsg', 'privmsg'],
                                             r'^!race\s+(\S+)\s+update\s+(.*)$',
                                             self.update)

    def join(self, nick, userhost, event, from_admin, groups):
        """Join a race."""

        race_id, = groups
        try:
            race = Race.objects.get(key=race_id)

            # is the nick already in the race
            try:
                racer = Racer.objects.get(race=race, nick=nick)

                # ideally they're not in the db, but if they aren't flagged as joined,
                # then let them join again i guess
                if racer.joined:
                    return self.irc.reply(event, "you are already in {0:s}.".format(race.name))
            except Racer.DoesNotExist:
                racer = Racer()
                racer.race = race
                racer.nick = nick

            racer.joined = True
            racer.started = False
            racer.finished = False
            racer.save()

            return self.irc.reply(event,
                                  "you have joined {0:s}.".format(race.name))
        except Race.DoesNotExist:
            return self.irc.reply(event, "race {0:s} not found.".format(race_id))

    def leave(self, nick, userhost, event, from_admin, groups):
        """Leave a race."""

        race_id, = groups
        try:
            race = Race.objects.get(key=race_id)

            try:
                racer = Racer.objects.get(race=race, nick=nick)

                if racer.finished:
                    return self.irc.reply(event, "you can't leave {0:s} since you finished it."
                                          "".format(race.name))

                if racer.joined:
                    racer.joined = False
                    racer.save()

                    return self.irc.reply(event, "you have left {0:s}.".format(race.name))
                else:
                    return self.irc.reply(event, "you weren't in {0:s}.".format(race.name))
            except Racer.DoesNotExist:
                return self.irc.reply(event, "you weren't in {0:s}.".format(race.name))
        except Race.DoesNotExist:
            return self.irc.reply(event, "race {0:s} not found.".format(race_id))

    def start(self, nick, userhost, event, from_admin, groups):
        """Start racing."""

        race_id, = groups
        try:
            race = Race.objects.get(key=race_id)

            try:
                racer = Racer.objects.get(race=race, nick=nick)

                if racer.started:
                    return self.irc.reply(event, "you have already started {0:s}.".format(race.name))

                if racer.finished:
                    return self.irc.reply(event, "you can't start {0:s} since you finished it."
                                          "".format(race.name))

                racer.started = True
                racer.save()

                # create an event for this too
                RaceUpdate.objects.create(race=race, racer=racer, update="Started the race.")

                return self.irc.reply(event, "you have started {0:s}.".format(race.name))
            except Racer.DoesNotExist:
                return self.irc.reply(event, "you have not joined {0:s}.".format(race.name))
        except Race.DoesNotExist:
            return self.irc.reply(event, "race {0:s} not found.".format(race_id))

    def finish(self, nick, userhost, event, from_admin, groups):
        """Finish racing."""

        race_id, = groups
        try:
            race = Race.objects.get(key=race_id)

            try:
                racer = Racer.objects.get(race=race, nick=nick)

                if not racer.started:
                    return self.irc.reply(event, "you have not started {0:s}.".format(race.name))

                if racer.finished:
                    return self.irc.reply(event, "you have already finished {0:s}."
                                          "".format(race.name))

                racer.finished = True
                racer.save()

                # create an event for this too
                RaceUpdate.objects.create(race=race, racer=racer, update="Finished the race.")

                return self.irc.reply(event, "you have finished {0:s}.".format(race.name))
            except Racer.DoesNotExist:
                return self.irc.reply(event, "you have not joined {0:s}.".format(race.name))
        except Race.DoesNotExist:
            return self.irc.reply(event, "race {0:s} not found.".format(race_id))

    def update(self, nick, userhost, event, from_admin, groups):
        """Add an update to an ongoing race."""

        race_id, update = groups
        try:
            race = Race.objects.get(key=race_id)

            try:
                racer = Racer.objects.get(race=race, nick=nick)

                if not racer.started:
                    return self.irc.reply(event, "you have not started {0:s}.".format(race.name))

                if racer.finished:
                    return self.irc.reply(event, "you have already finished {0:s}."
                                          "".format(race.name))

                # create an event
                RaceUpdate.objects.create(race=race, racer=racer, update=update)

                return self.irc.reply(event, "update logged.")
            except Racer.DoesNotExist:
                return self.irc.reply(event, "you have not joined {0:s}.".format(race.name))
        except Race.DoesNotExist:
            return self.irc.reply(event, "race {0:s} not found.".format(race_id))

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