# Copyright 2026 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


"""Utility functions and classes for the CLI."""

import typing


class LazyCallable:
    """A proxy wrapper that lazily imports and executes a callable."""

    def __init__(self, module_path: str, func_name: str) -> None:
        self.module_path = module_path
        self.func_name = func_name
        self._func = None

    def __call__(self, *args: typing.Any, **kwargs: typing.Any) -> typing.Any:  # noqa: F821
        if self._func is None:
            import importlib

            module = importlib.import_module(self.module_path)
            self._func = getattr(module, self.func_name)
        return self._func(*args, **kwargs)