from __future__ import annotations

import logging
import secrets
import time

logger = logging.getLogger(__name__)


class QQBotPairing:
    def __init__(self):
        self._codes: dict[str, tuple[str, float]] = {}
        self._code_ttl = 300
        self._id_label = "QQ OpenID"

    @property
    def id_label(self) -> str:
        return self._id_label

    async def generate_code(self, peer_id: str) -> str:
        code = secrets.token_hex(3).upper()
        self._codes[peer_id] = (code, time.time())
        logger.info("Pairing code generated for peer=%s: %s", peer_id, code)
        return code

    async def verify_code(self, peer_id: str, code: str) -> bool:
        entry = self._codes.get(peer_id)
        if entry is None:
            return False

        stored_code, created_at = entry
        if time.time() - created_at > self._code_ttl:
            del self._codes[peer_id]
            return False

        if stored_code.upper() == code.upper():
            del self._codes[peer_id]
            return True

        return False

    async def notify_approval(self, config: dict, peer_id: str, account_id: str | None = None) -> None:
        logger.info("Pairing approval notification for peer=%s", peer_id)

    def normalize_allow_entry(self, entry: str) -> str:
        if entry.startswith("qqbot:"):
            return entry.split(":", 1)[1] if len(entry.split(":", 1)) >= 2 else entry
        return entry