import time
from collections import OrderedDict


class DedupeTracker:
    def __init__(self, max_entries: int = 50_000, ttl_s: int = 3600):
        self.max_entries = max_entries
        self.ttl_s = ttl_s
        self._store: OrderedDict[str, float] = OrderedDict()
        self._last_prune = time.monotonic()

    def has(self, event_id: str) -> bool:
        self._maybe_prune()
        if event_id in self._store:
            self._store.move_to_end(event_id)
            return True
        self._store[event_id] = time.monotonic()
        if len(self._store) > self.max_entries:
            self._store.popitem(last=False)
        return False

    def _maybe_prune(self):
        now = time.monotonic()
        if now - self._last_prune < 600:
            return
        self._last_prune = now
        expired = [k for k, ts in self._store.items() if now - ts > self.ttl_s]
        for k in expired:
            del self._store[k]