"""Authentication dependency function is defined here."""

from dataclasses import dataclass

import jwt
from fastapi import Request

from . import logger_dep


@dataclass
class AuthenticationData:
    api_key: str | None
    jwt_payload: dict | None
    jwt_original: str | None


def obtain(request: Request) -> AuthenticationData:
    if hasattr(request.state, "auth_dep"):
        return request.state.auth_dep
    auth = AuthenticationData(None, None, None)
    if (value := request.headers.get("X-API-Key")) is not None:
        auth.api_key = value
    if (value := request.headers.get("Authorization")) is not None and value.startswith("Bearer "):
        value = value[7:]
        auth.jwt_original = value
        try:
            auth.jwt_payload = jwt.decode(value, algorithms=["HS256"], options={"verify_signature": False})
        except Exception:  # pylint: disable=broad-except
            logger = logger_dep.obtain(request)
            logger.warning("failed to parse Authorization header as jwt", value=value)
            logger.debug("failed to parse Authorization header as jwt", exc_info=True)
    request.state.auth_dep = auth
    return auth