import logging
import time
from collections import OrderedDict

logger = logging.getLogger("yuxi.channel.generic_webhook.dedupe")

DEFAULT_TTL = 600
DEFAULT_MAX_SIZE = 10000


class WebhookDeduplicator:
    def __init__(self, max_size: int = DEFAULT_MAX_SIZE, ttl_seconds: int = DEFAULT_TTL):
        self._cache: OrderedDict[str, float] = OrderedDict()
        self._max_size = max_size
        self._ttl = ttl_seconds

    def is_duplicate(self, endpoint_id: str, event_id: str) -> bool:
        if not event_id:
            return False

        key = f"{endpoint_id}:{event_id}"
        now = time.monotonic()

        self._evict_expired(now)

        if key in self._cache:
            return True

        self._cache[key] = now
        while len(self._cache) > self._max_size:
            self._cache.popitem(last=False)
        return False

    def _evict_expired(self, now: float):
        threshold = now - self._ttl
        while self._cache:
            _, t = next(iter(self._cache.items()))
            if t >= threshold:
                break
            self._cache.popitem(last=False)

    def reset(self, endpoint_id: str | None = None):
        if endpoint_id:
            prefix = f"{endpoint_id}:"
            keys_to_remove = [k for k in self._cache if k.startswith(prefix)]
            for k in keys_to_remove:
                del self._cache[k]
        else:
            self._cache.clear()

    @property
    def size(self) -> int:
        return len(self._cache)