from __future__ import annotations

import logging

from yuxi.channel.extensions.wechat_ilink.types import ILinkAccount, ILinkDMStrategy, ILinkGroupStrategy

logger = logging.getLogger(__name__)


class ILinkSecurity:
    def __init__(self, account: ILinkAccount, pairing=None):
        self._account = account
        self._pairing = pairing

    def check_dm_access(self, sender_id: str) -> bool:
        policy = self._account.dm_policy

        if policy == ILinkDMStrategy.DISABLED:
            return False

        if policy == ILinkDMStrategy.OPEN:
            if not self._account.allow_from or "*" in self._account.allow_from:
                return True
            return sender_id in self._account.allow_from

        if policy == ILinkDMStrategy.ALLOWLIST:
            return sender_id in self._account.allow_from

        if policy == ILinkDMStrategy.PAIRING:
            return self._check_pairing(sender_id)

        return True

    def check_group_access(self, group_id: str, sender_id: str) -> bool:
        policy = self._account.group_policy

        if policy == ILinkGroupStrategy.DISABLED:
            return False

        if policy == ILinkGroupStrategy.OPEN:
            return True

        if policy == ILinkGroupStrategy.ALLOWLIST:
            return group_id in self._account.allow_from

        return True

    def _check_pairing(self, sender_id: str) -> bool:
        if self._pairing is None:
            return False
        return self._pairing.is_paired(sender_id)