from __future__ import annotations

import asyncio
import logging
import secrets
import time

logger = logging.getLogger(__name__)

CODE_TTL_SECONDS = 600


class GitLabPairing:
    def __init__(self):
        self._codes: dict[str, dict] = {}
        self._locks: dict[str, asyncio.Lock] = {}

    async def generate_code(self, peer_id: str, account_id: str = "default") -> str:
        key = f"{account_id}:{peer_id}"
        code = secrets.token_hex(3).upper()
        self._codes[key] = {"code": code, "created_at": time.monotonic()}
        logger.info("gitlab pairing code generated for %s: %s", peer_id, code)
        return code

    async def verify_code(self, peer_id: str, code: str, account_id: str = "default") -> bool:
        key = f"{account_id}:{peer_id}"
        entry = self._codes.get(key)
        if not entry:
            return False
        if time.monotonic() - entry["created_at"] > CODE_TTL_SECONDS:
            self._codes.pop(key, None)
            return False
        if entry["code"].upper() == code.upper().strip():
            self._codes.pop(key, None)
            return True
        return False

    def normalize_allow_entry(self, entry: str) -> str:
        return str(entry).strip()