from fastapi import Depends
from fastapi.security import OAuth2PasswordBearer
from sqlalchemy.orm import Session

from ..config import Config
from ..db import Connection
from ..db.schemas import User

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


# just a namespace
class Responses:
    ok = {
        "content": None,
    }
    installed = {
        "description": "kiwi-vpn already installed",
        "content": None,
    }
    not_installed = {
        "description": "kiwi-vpn not installed",
        "content": None,
    }
    needs_user = {
        "description": "Must be logged in",
        "content": None,
    }
    needs_admin = {
        "description": "Must be admin",
        "content": None,
    }
    entry_exists = {
        "description": "Entry exists in database",
        "content": None,
    }


async def get_current_user(
    token: str = Depends(oauth2_scheme),
    db: Session | None = Depends(Connection.get),
    current_config: Config | None = Depends(Config.load),
):
    if current_config is None:
        return None

    username = await current_config.jwt.decode_token(token)
    user = User.from_db(db, username)

    return user