from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from typing import Optional

router = APIRouter()
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/login")

@router.post("/logout", status_code=status.HTTP_200_OK)
async def logout(token: str = Depends(oauth2_scheme)):
    """
    Logout endpoint to invalidate the current user's access token.

    Args:
        token (str): The access token to be invalidated.

    Returns:
        dict: A JSON response indicating the success of the logout operation.
    """
    # Implement token invalidation logic here
    # For example, you could store the invalidated token in a blacklist or revoke it from the authentication provider

    return {"message": "Logout successful"}