# Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES, ETH Zurich, and University of Toronto
# All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause

"""
Base class for tele-operation interface.
"""


from abc import ABC, abstractmethod
from typing import Any, Callable


class DeviceBase(ABC):
    """An interface class for teleoperation devices."""

    def __init__(self):
        """Initialize the teleoperation interface."""
        pass

    def __str__(self) -> str:
        """Returns: A string containing the information of joystick."""
        pass

    """
    Operations
    """

    @abstractmethod
    def reset(self):
        """Reset the internals."""
        raise NotImplementedError

    @abstractmethod
    def add_callback(self, key: str, func: Callable):
        """Add additional functions to bind keyboard.

        Args:
            key (str): The keyboard button to check against.
            func (Callable): The function to call when key is pressed.
        """
        raise NotImplementedError

    @abstractmethod
    def advance(self) -> Any:
        """Provides the joystick event state.

        Returns:
            Any -- The processed output form the joystick.
        """
        raise NotImplementedError
