from sqlalchemy import insert, select, update, and_

from app.dao.base import BaseDAO
from app.database import async_session_maker
from app.users.models import Users
from app.users.chat.models import Chats, Messages


class ChatDAO(BaseDAO):
    model = Chats

    @classmethod
    async def create(cls, user_id):
        query = insert(Chats).values(chat_for=user_id)
        async with async_session_maker() as session:
            await session.execute(query)
            await session.commit()
        return True

    @classmethod
    async def send_message(cls, user_id, chat_id, message):
        query = insert(Messages).values(chat_id=chat_id, user_id=user_id, message=message, image_url=None)
        async with async_session_maker() as session:
            await session.execute(query)
            await session.commit()
        return True

    @classmethod
    async def get_message_by_id(cls, message_id):
        query = select(Messages.__table__.columns).where(
            and_(
                Messages.id == message_id,
                Messages.visibility == True
            )

        )
        async with async_session_maker() as session:
            result = await session.execute(query)
        result = result.mappings().all()
        if result:
            return result[0]

    @classmethod
    async def get_last_message(cls, chat_id):
        query = select(Messages.__table__.columns).where(
            and_(
                Messages.chat_id == chat_id,
                Messages.visibility == True
            )
        ).order_by(Messages.created_at.desc()).limit(1)
        async with async_session_maker() as session:
            result = await session.execute(query)
        result = result.mappings().all()
        if result:
            return result[0]

    @classmethod
    async def delete_message(cls, message_id):
        query = update(Messages).where(Messages.id == message_id).values(visibility=False)
        async with async_session_maker() as session:
            await session.execute(query)
            await session.commit()
        return True