"""Shared Redis connection (cache / quota counters / cost budget counter)."""

from __future__ import annotations

from redis.asyncio import Redis, from_url

from packages.shared.config import Settings, get_settings

_client: Redis | None = None


def create_redis(settings: Settings | None = None) -> Redis:
    cfg = settings or get_settings()
    return from_url(cfg.redis_url, encoding="utf-8", decode_responses=True)


def get_redis() -> Redis:
    global _client
    if _client is None:
        _client = create_redis()
    return _client


async def close_redis() -> None:
    global _client
    if _client is not None:
        await _client.aclose()
    _client = None