from __future__ import annotations

import time
from collections import OrderedDict


class TencentSmsDeduplicator:
    def __init__(self, max_size: int = 10000, ttl_seconds: int = 600):
        self._cache: OrderedDict[str, float] = OrderedDict()
        self._max_size = max_size
        self._ttl_seconds = ttl_seconds

    def _evict_expired(self, now: float) -> None:
        expired = [k for k, ts in self._cache.items() if now - ts > self._ttl_seconds]
        for k in expired:
            del self._cache[k]

    def _evict_oldest(self) -> None:
        while len(self._cache) > self._max_size:
            self._cache.popitem(last=False)

    def is_duplicate(self, dedupe_key: str) -> bool:
        now = time.monotonic()
        self._evict_expired(now)
        if dedupe_key in self._cache:
            return True
        self._cache[dedupe_key] = now
        self._evict_oldest()
        return False

    def check(self, dedupe_key: str) -> bool:
        now = time.monotonic()
        self._evict_expired(now)
        return dedupe_key in self._cache

    def mark_seen(self, dedupe_key: str) -> None:
        now = time.monotonic()
        self._evict_expired(now)
        if dedupe_key not in self._cache:
            self._cache[dedupe_key] = now
            self._evict_oldest()

    @property
    def ttl_seconds(self) -> int:
        return self._ttl_seconds

    @property
    def max_entries(self) -> int:
        return self._max_size

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