# Path: google/cloud/sql/connector/rate_limiter.py
# class AsyncRateLimiter(object):
#     """
#     An asyncio-compatible rate limiter which uses the Token Bucket algorithm
#     (https://en.wikipedia.org/wiki/Token_bucket) to limit the number of function calls over a time interval using an event queue.
# 
#     :type max_capacity: int
#     :param: max_capacity:
#         The maximum capacity of tokens the bucket will store at any one time.
#         Default: 1
# 
#     :type rate: float
#     :param: rate:
#         The number of tokens that should be added per second.
# 
#     :type loop: asyncio.AbstractEventLoop
#     :param: loop:
#         The event loop to use. If not provided, the default event loop will be used.
# 
# 
#     """
# 
#     def __init__(
#         self,
#         max_capacity: int = 1,
#         rate: float = 1 / 60,
#         loop: asyncio.AbstractEventLoop = None,
#     ) -> None:
#         self.rate = rate
#         self.max_capacity = max_capacity
#         self._loop = loop or asyncio.get_event_loop()
#         self._tokens: float = max_capacity
#         self._last_token_update = self._loop.time()
#         self._lock = asyncio.Lock()
# 
#     def _update_token_count(self) -> None:
#         """
#         Calculates how much time has passed since the last leak and removes the
#         appropriate amount of events from the queue.
#         Leaking is done lazily, meaning that if there is a large time gap between
#         leaks, the next set of calls might be a burst if burst_size > 1
#         """
#         now = self._loop.time()
#         time_elapsed = now - self._last_token_update
#         new_tokens = time_elapsed * self.rate
#         self._tokens = min(new_tokens + self._tokens, self.max_capacity)
#         self._last_token_update = now
# 
#     async def _wait_for_next_token(self) -> None:
#         """
#         Wait until enough time has elapsed to add another token.
#         """
#         token_deficit = 1 - self._tokens
#         if token_deficit > 0:
#             wait_time = token_deficit / self.rate
#             await asyncio.sleep(wait_time)
# 
#     async def acquire(self) -> None:
#         """
#         Waits for a token to become available, if necessary, then subtracts token and allows
#         request to go through.
#         """
#         async with self._lock:
#             self._update_token_count()
#             if self._tokens < 1:
#                 await self._wait_for_next_token()
#                 self._update_token_count()
#             self._tokens -= 1


import asyncio
import pytest  # noqa F401 Needed to run the tests
from google.cloud.sql.connector.rate_limiter import (
    AsyncRateLimiter,
)
""""
Copyright 2021 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.
"""




async def rate_limiter_in_loop(
    max_capacity: int, rate: float, loop: asyncio.AbstractEventLoop

# Path: google/cloud/sql/connector/rate_limiter.py
# class AsyncRateLimiter(object):
#     """
#     An asyncio-compatible rate limiter which uses the Token Bucket algorithm
#     (https://en.wikipedia.org/wiki/Token_bucket) to limit the number of function calls over a time interval using an event queue.
# 
#     :type max_capacity: int
#     :param: max_capacity:
#         The maximum capacity of tokens the bucket will store at any one time.
#         Default: 1
# 
#     :type rate: float
#     :param: rate:
#         The number of tokens that should be added per second.
# 
#     :type loop: asyncio.AbstractEventLoop
#     :param: loop:
#         The event loop to use. If not provided, the default event loop will be used.
# 
# 
#     """
# 
#     def __init__(
#         self,
#         max_capacity: int = 1,
#         rate: float = 1 / 60,
#         loop: asyncio.AbstractEventLoop = None,
#     ) -> None:
#         self.rate = rate
#         self.max_capacity = max_capacity
#         self._loop = loop or asyncio.get_event_loop()
#         self._tokens: float = max_capacity
#         self._last_token_update = self._loop.time()
#         self._lock = asyncio.Lock()
# 
#     def _update_token_count(self) -> None:
#         """
#         Calculates how much time has passed since the last leak and removes the
#         appropriate amount of events from the queue.
#         Leaking is done lazily, meaning that if there is a large time gap between
#         leaks, the next set of calls might be a burst if burst_size > 1
#         """
#         now = self._loop.time()
#         time_elapsed = now - self._last_token_update
#         new_tokens = time_elapsed * self.rate
#         self._tokens = min(new_tokens + self._tokens, self.max_capacity)
#         self._last_token_update = now
# 
#     async def _wait_for_next_token(self) -> None:
#         """
#         Wait until enough time has elapsed to add another token.
#         """
#         token_deficit = 1 - self._tokens
#         if token_deficit > 0:
#             wait_time = token_deficit / self.rate
#             await asyncio.sleep(wait_time)
# 
#     async def acquire(self) -> None:
#         """
#         Waits for a token to become available, if necessary, then subtracts token and allows
#         request to go through.
#         """
#         async with self._lock:
#             self._update_token_count()
#             if self._tokens < 1:
#                 await self._wait_for_next_token()
#                 self._update_token_count()
#             self._tokens -= 1


# Path: tests/unit/test_rate_limiter.py
import asyncio
import pytest  # noqa F401 Needed to run the tests
from google.cloud.sql.connector.rate_limiter import (
    AsyncRateLimiter,
)

""""
Copyright 2021 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.
"""




async def rate_limiter_in_loop(
    max_capacity: int, rate: float, loop: asyncio.AbstractEventLoop

) -> AsyncRateLimiter: