from __future__ import annotations

import logging
import time
from collections import OrderedDict

logger = logging.getLogger(__name__)


class TwitterDeduplicator:
    def __init__(self, max_size: int = 5000, ttl_seconds: int = 86400):
        self._cache: OrderedDict[str, float] = OrderedDict()
        self._max_size = max_size
        self._ttl = ttl_seconds

    def is_duplicate(self, msg_id: str) -> bool:
        if not msg_id:
            return False
        now = time.monotonic()
        self._evict_expired(now)
        if msg_id in self._cache:
            return True
        self._cache[msg_id] = now
        while len(self._cache) > self._max_size:
            self._cache.popitem(last=False)
        return False

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

    def _evict_expired(self, now: float):
        expired = [k for k, v in self._cache.items() if now - v > self._ttl]
        for k in expired:
            del self._cache[k]

    def reset(self):
        self._cache.clear()


_deduplicators: dict[str, TwitterDeduplicator] = {}


def get_deduplicator(account_id: str) -> TwitterDeduplicator:
    if account_id not in _deduplicators:
        _deduplicators[account_id] = TwitterDeduplicator()
    return _deduplicators[account_id]