from typing import Optional
from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
from sqlalchemy import Column, DateTime
from sqlalchemy.sql import func
from datetime import datetime

engine = create_async_engine("sqlite+aiosqlite:///questions.db")
new_session = async_sessionmaker(engine, expire_on_commit=False)

class Model(DeclarativeBase):
    pass

class QuestionOrm(Model):
    __tablename__ = "questions"

    id: Mapped[int] = mapped_column(primary_key=True)
    email_user: Mapped[str]
    type_question: Mapped[bool]
    question: Mapped[str]
    answer: Mapped[Optional[str]]
    question_time: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())

async def create_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Model.metadata.create_all)

async def delete_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Model.metadata.drop_all)