from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from sqlmodel import Session

from app.db.session import get_session
from app.core.security import decode_token
from app.models.models import User

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login")


def get_db():
    yield from get_session()


def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)) -> User:
    try:
        payload = decode_token(token)
        user_id = int(payload.get("sub"))
    except Exception:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
    user = db.get(User, user_id)
    if not user:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found")
    return user