""" chat database """

from typing import Dict, List, Union

from driver.database.dblocal import db

chatsdb = db.chats


async def get_served_chats() -> list:
    chats = chatsdb.find({"chat_id": {"$lt": 0}})
    if not chats:
        return []
    chats_list = []
    for chat in await chats.to_list(length=1000000000):
        chats_list.append(chat)
    return chats_list


async def is_served_chat(chat_id: int) -> bool:
    chat = await chatsdb.find_one({"chat_id": chat_id})
    if not chat:
        return False
    return True


async def add_served_chat(chat_id: int):
    is_served = await is_served_chat(chat_id)
    if is_served:
        return
    return await chatsdb.insert_one({"chat_id": chat_id})


async def remove_served_chat(chat_id: int):
    is_served = await is_served_chat(chat_id)
    if not is_served:
        return
    return await chatsdb.delete_one({"chat_id": chat_id})