from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
from sqlmodel import Session, select

from app.connection import get_session
from app.models.user import User
from app.auth.utils import decode_access_token

security = HTTPBearer()


def get_current_user(
    credentials: HTTPAuthorizationCredentials = Depends(security),
    session: Session = Depends(get_session),
) -> User:
    """Извлекает текущего пользователя из JWT-токена."""
    payload = decode_access_token(credentials.credentials)
    if payload is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Невалидный токен",
        )

    user_id: int | None = payload.get("sub")
    if user_id is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Невалидный токен",
        )

    user = session.get(User, int(user_id))
    if user is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Пользователь не найден",
        )
    return user


def get_current_organizer(
    current_user: User = Depends(get_current_user),
) -> User:
    """Проверяет, что текущий пользователь — организатор."""
    if not current_user.is_organizer:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Доступно только организаторам",
        )
    return current_user