# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
# 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
#
#     http://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.
# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

import asyncio
from contextlib import AbstractAsyncContextManager


class ConcurrencyLimiter:
    """Limit concurrent async operations within one process.

    Args:
        max_concurrency (int): Maximum number of simultaneous operations.
    """

    def __init__(self, max_concurrency: int) -> None:
        if max_concurrency < 1:
            raise ValueError("max_concurrency must be at least 1")
        self._semaphore = asyncio.Semaphore(max_concurrency)

    def acquire(self) -> AbstractAsyncContextManager[None]:
        """Return a context manager that holds one concurrency permit."""
        return self._semaphore
