import re
from typing import Optional

from vkbottle import API
from vkbottle.bot import Message
from vkbottle.framework.labeler import BotLabeler
from vkbottle_types.codegen.objects import GroupsGroup

import utils
from ai_agent import AiAgent, AiMessage
import vk.vk_database as database

labeler = BotLabeler()

agent: Optional[AiAgent] = None
bot_user: Optional[GroupsGroup] = None


async def get_user_name_for_ai(api: API, user_id: int):
    user = await api.users.get(user_ids=[user_id])
    if len(user) == 1:
        return "{} {}".format(user[0].first_name, user[0].last_name)
    else:
        return '@id' + str(user_id)


# Обычные сообщения (не команды и не действия)
@labeler.chat_message()
async def any_message_handler(message: Message):
    chat_id = message.peer_id
    chat = database.DB.create_chat_if_not_exists(chat_id)
    if chat['active'] == 0:
        return

    # Игнорировать ботов
    if message.from_id < 0:
        return

    # Не учитывать служебные сообщения
    if message.action is not None:
        return

    user_id = message.from_id
    database.DB.create_user_if_not_exists(chat_id, user_id)
    database.DB.user_set_last_message(chat_id, user_id, utils.posix_time())
    database.DB.user_increment_messages(chat_id, user_id)

    global bot_user
    if bot_user is None:
        bot_user = (await message.ctx_api.groups.get_by_id()).groups[0]

    ai_message = AiMessage()
    ai_fwd_message: Optional[AiMessage] = None

    # Ответ на сообщение бота
    if message.reply_message and message.reply_message.from_id == -bot_user.id:
        ai_message.text = message.text
    else:
        # Сообщение содержит @bot_username
        bot_username_mention = '@' + bot_user.screen_name
        if message.text is not None and message.text.find(bot_username_mention) != -1:
            ai_message.text = message.text.replace(bot_username_mention, bot_user.name)
        else:
            # Сообщение содержит [club<bot_id>|<some_name>]
            pattern = r"\[club" + str(bot_user.id) + r"\|(.+)]"
            if message.text is not None and re.search(pattern, message.text) is not None:
                ai_message.text = re.sub(pattern, r'\1', message.text)
            else:
                return

        if message.reply_message and message.reply_message.text is not None:
            ai_fwd_message = (
                AiMessage(user_name=await get_user_name_for_ai(message.ctx_api, message.reply_message.from_id),
                          text=message.reply_message.text))

    ai_message.user_name = await get_user_name_for_ai(message.ctx_api, message.from_id)
    chat_prompt = chat['ai_prompt']

    global agent
    if agent is None:
        # noinspection PyUnresolvedReferences
        agent = AiAgent(message.ctx_api.config['openrouter_token'])

    await message.ctx_api.messages.set_activity(peer_id=chat_id, type='typing')
    await message.reply(await agent.get_reply(chat_id, chat_prompt, ai_message, ai_fwd_message))


def clear_ai_chat_context(chat_id: int):
    global agent
    if agent is not None:
        agent.clear_chat_context(chat_id)