from fastapi import Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer
from jose import JWTError, jwt
from config import SECRET_KEY, ALGORITHM, users_collection

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="https://rocketfarmstudios-cps-api.hf.space/auth/login")

async def get_current_user(token: str = Depends(oauth2_scheme)):
    credentials_exception = HTTPException(
        status_code=401,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": "Bearer"},
    )
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        email: str = payload.get("sub")
        if email is None:
            raise credentials_exception
    except JWTError:
        raise credentials_exception
    user = await users_collection.find_one({"email": email})
    if user is None:
        raise credentials_exception
    return user