import time
from collections import OrderedDict

from yuxi.channel.extensions.farcaster.defaults import DEDUPE_MAX_TRACKED, DEDUPE_TTL_S


class FarcasterDeduplicator:
    def __init__(self):
        self._seen: OrderedDict[str, float] = OrderedDict()

    def is_duplicate(self, msg_id: str) -> bool:
        self._evict_expired()
        if msg_id in self._seen:
            return True
        self._seen[msg_id] = time.time()
        self._trim()
        return False

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

    def _evict_expired(self) -> None:
        now = time.time()
        expired = [k for k, v in self._seen.items() if now - v > DEDUPE_TTL_S]
        for key in expired:
            self._seen.pop(key, None)

    def _trim(self) -> None:
        while len(self._seen) > DEDUPE_MAX_TRACKED:
            self._seen.popitem(last=False)