# reminder - A maubot plugin that reacts to messages that match predefined rules.
# Copyright (C) 2019 Tulir Asokan
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
from typing import Type

from mautrix.types import EventType
from mautrix.util.config import BaseProxyConfig

from maubot import Plugin, MessageEvent
from maubot.handlers import event

from .config import Config, ConfigError


class ReactBot(Plugin):
    @classmethod
    def get_config_class(cls) -> Type[BaseProxyConfig]:
        return Config

    async def start(self) -> None:
        await super().start()
        self.on_external_config_update()

    def on_external_config_update(self) -> None:
        self.config.load_and_update()
        try:
            self.config.parse_data()
        except ConfigError:
            self.log.exception("Failed to load config")

    @event.on(EventType.ROOM_MESSAGE)
    async def event_handler(self, evt: MessageEvent) -> None:
        if evt.sender == self.client.mxid:
            return
        for name, rule in self.config.rules.items():
            match = rule.match(evt)
            if match is not None:
                try:
                    await rule.execute(evt, match)
                except Exception:
                    self.log.exception(f"Failed to execute {name}")
                return