"""Redis connection management."""
from redis.asyncio import Redis

from app.core.config import settings

_redis: Redis | None = None


async def get_redis() -> Redis:
    """Get or create Redis connection."""
    global _redis
    if _redis is None:
        _redis = Redis.from_url(settings.REDIS_URL, decode_responses=True)
    return _redis


async def close_redis() -> None:
    """Close Redis connection."""
    global _redis
    if _redis:
        await _redis.close()
        _redis = None


async def check_redis_health() -> bool:
    """Check if Redis is reachable."""
    try:
        redis = await get_redis()
        await redis.ping()
        return True
    except Exception:
        return False