"""IRC support for managing and executing the IdleRPG game.

SPDX-FileCopyrightText: © 2024 Brian S. Stephan <bss@incorporeal.org>
SPDX-License-Identifier: AGPL-3.0-or-later
"""
import logging
import threading
import time

import irc.client
from django.db.utils import IntegrityError
from ircbot.lib import Plugin

from idlerpg.models import Character, Game

logger = logging.getLogger(__name__)


class IdleRPG(Plugin):
    """Run a game of IdleRPG."""

    SLEEP_BETWEEN_LEVEL_CHECKS = 1

    LOGIN_COMMAND_PATTERN = r'^LOGIN\s+(?P<name>\S+)\s+(?P<password>\S+)$'
    LOGOUT_COMMAND_PATTERN = r'^LOGOUT$'
    REGISTER_COMMAND_PATTERN = r'^REGISTER\s+(?P<name>\S+)\s+(?P<password>\S+)\s+(?P<char_class>.*)$'
    REMOVEME_COMMAND_PATTERN = r'^REMOVEME$'
    STATUS_COMMAND_PATTERN = r'^(STATUS|WHOAMI)$'

    def __init__(self, bot, connection, event):
        """Initialize miscellaneous state stuff."""
        self.seen_hostmasks = set()
        super().__init__(bot, connection, event)

    def handle_join(self, connection, event):
        """Track a character as online if their player joins the game channel."""
        self.seen_hostmasks.add(event.source)
        logger.info("Added %s to the set of seen hostmasks.", event.source)

    def handle_kick_penalty(self, connection, event):
        """Penalize characters for their user getting kicked from the channel."""
        self.seen_hostmasks.discard(event.source)
        logger.info("Removed %s from the set of seen hostmasks.", event.source)
        return self._handle_generic_penalty_and_logout(event.source, event.target, 250,
                                                       "getting kicked from the game channel",
                                                       'time_penalized_kicked')

    def handle_nick_penalty(self, connection, event):
        """Penalize characters for changing their nick while in the channel."""
        # TODO: figure out how to update the character and seen hostmasks
        return self._handle_generic_penalty_and_logout(event.source, event.target, 30,
                                                       "changing their nick",
                                                       'time_penalized_nick_change')

    def handle_part_penalty(self, connection, event):
        """Penalize characters for their user parting."""
        self.seen_hostmasks.discard(event.source)
        logger.info("Removed %s from the set of seen hostmasks.", event.source)
        return self._handle_generic_penalty_and_logout(event.source, event.target, 200,
                                                       "parting the game channel",
                                                       'time_penalized_part')

    def handle_message_penalty(self, connection, event):
        """Pay attention to messages in the game channel, and penalize talkers."""
        hostmask = event.source

        logger.debug("looking for %s to try to penalize them", hostmask)
        try:
            character = Character.objects.get(enabled=True, hostmask=hostmask)
            logger.debug("found character %s", character)
            message = event.arguments[0]
            penalty = character.penalize(len(message), "sending a privmsg to the game channel")
            character.time_penalized_privmsg += penalty
            character.save()
        except Character.DoesNotExist:
            logger.debug("no character found for %s", hostmask)
            return

    def handle_quit_penalty(self, connection, event):
        """Penalize characters for their user quitting IRC."""
        self.seen_hostmasks.discard(event.source)
        logger.info("Removed %s from the set of seen hostmasks.", event.source)
        return self._handle_generic_penalty_and_logout(event.source, event.target, 20,
                                                       "quitting IRC",
                                                       'time_penalized_quit')

    def handle_login(self, connection, event, match):
        """Log in a character when requested, assuming they're online."""
        hostmask = event.source

        nick = irc.client.NickMask(hostmask).nick
        try:
            character = Character.objects.get(enabled=True, name=match.group('name'))
            character.check_password(match.group('password'))
        except (Character.DoesNotExist, ValueError):
            return self.bot.reply(event, "The requested character does not exist, or has been disabled, "
                                  "or your password does not match.")

        if hostmask not in self.seen_hostmasks:
            return self.bot.reply(event, f"Please join {character.game.channel.name} before logging in.")

        if character.status != Character.CHARACTER_STATUS_OFFLINE:
            return self.bot.reply(event, f"Cannot log in {character.name}, either they already are, "
                                  "or they are in a state that cannot be modified.")

        character.log_in(match.group('password'), hostmask)
        character.save()
        self.bot.reply(None, f"{character}, is now online from nickname {nick}. "
                       f"Next level at {character.next_level_str()}.",
                       explicit_target=character.game.channel.name)
        return self.bot.reply(event, f"{character} has been successfully logged in.")

    def _handle_generic_penalty_and_logout(self, hostmask: str, channel: str, penalty: int, reason: str,
                                           penalty_log_attr: str):
        """Penalize a character and log them out, for a provided reason.

        Args:
            hostmask: the hostmask for the character in question
            channel: the game channel the event occurred in
            penalty: the penalty to apply
            reason: the reason for the penalty
        """
        logger.debug("looking for %s to try to penalize them", hostmask)
        try:
            character = Character.objects.get(enabled=True, hostmask=hostmask)
            logger.debug("character found for %s", hostmask)
            seconds = character.penalize(penalty, reason)
            log = getattr(character, penalty_log_attr)
            setattr(character, penalty_log_attr, log + seconds)
            try:
                character.log_out()
            except ValueError:
                logger.debug("tried to log out %s but they already were", character)
            character.save()
        except Character.DoesNotExist:
            logger.debug("no character found for %s", hostmask)


plugin = IdleRPG