from typing import Any

from app.core.jwt import decode_token
from app.db import SessionLocal
from app.models import User


def get_context_value(request: Any, data: Any = None) -> dict[str, Any]:
    # создать сессию SQLAlchemy (`SessionLocal()`);
    db = SessionLocal()
    user = None

    # извлечь заголовок `Authorization`;
    authorization = request.headers.get("authorization")
    if authorization and authorization.lower().startswith("bearer "):
        # если токен передан и валиден – найти пользователя и положить его в контекст;
        try:
            payload = decode_token(authorization.split(" ", 1)[1])
            sub = payload.get("sub")
            if isinstance(sub, str) and sub.isdigit():
                candidate = db.get(User, int(sub))
                if candidate is not None and candidate.is_active:
                    user = candidate
        except ValueError:
            user = None

    # вернуть словарь `{"request": ..., "db": ..., "user": ...}`.
    return {"request": request, "db": db, "user": user}