"""Rate limiting for requests."""
import time
from typing import Dict
from threading import Lock

_rate_limits: Dict[str, float] = {}
_lock = Lock()


def check_rate_limit(key: str, min_interval: float = 1.0):
    """Check and enforce rate limit."""
    with _lock:
        now = time.time()
        if key in _rate_limits:
            elapsed = now - _rate_limits[key]
            if elapsed < min_interval:
                time.sleep(min_interval - elapsed)
        _rate_limits[key] = time.time()


def reset_rate_limits():
    """Reset all rate limits."""
    with _lock:
        _rate_limits.clear()