from __future__ import annotations

import time
from collections import deque

RATE_LIMIT_WINDOW_SECONDS = 60
MAX_REQUESTS_PER_WINDOW = 2000


class GraphRateLimiter:
    def __init__(
        self,
        max_requests: int = MAX_REQUESTS_PER_WINDOW,
        window_seconds: int = RATE_LIMIT_WINDOW_SECONDS,
    ):
        self._max_requests = max_requests
        self._window_seconds = window_seconds
        self._timestamps: deque[float] = deque()
        self._remaining: int = max_requests

    def can_proceed(self) -> bool:
        self._cleanup()
        return len(self._timestamps) < self._max_requests

    def record(self) -> None:
        self._timestamps.append(time.monotonic())
        self._cleanup()

    @property
    def remaining(self) -> int:
        self._cleanup()
        return max(0, self._max_requests - len(self._timestamps))

    def _cleanup(self) -> None:
        cutoff = time.monotonic() - self._window_seconds
        while self._timestamps and self._timestamps[0] < cutoff:
            self._timestamps.popleft()

    def reset(self) -> None:
        self._timestamps.clear()