"""Redis client module."""

from redis.asyncio import Redis, from_url
from redis.asyncio.sentinel import Sentinel

from app.core.config import settings
from app.core.logging import get_logger

_redis_pool: Redis | None = None
_sentinel_pool: Sentinel | None = None
logger = get_logger(__name__)


async def get_redis() -> Redis:
    """Get global Redis client instance."""
    global _redis_pool, _sentinel_pool
    if _redis_pool is None:
        if settings.redis_sentinel_enabled:
            _sentinel_pool = Sentinel(
                settings.redis_sentinel_hosts,
                socket_timeout=settings.redis_sentinel_socket_timeout,
                password=settings.redis_sentinel_password or None,
                decode_responses=True,
            )
            _redis_pool = _sentinel_pool.master_for(
                settings.redis_sentinel_master_name,
                db=settings.redis_sentinel_db,
                decode_responses=True,
            )
            logger.info(
                "redis_connected_via_sentinel",
                master_name=settings.redis_sentinel_master_name,
                sentinel_nodes=settings.redis_sentinel_nodes,
            )
        else:
            _redis_pool = from_url(settings.redis_url, encoding="utf-8", decode_responses=True)
    return _redis_pool


async def close_redis():
    """Close Redis connection."""
    global _redis_pool, _sentinel_pool
    if _redis_pool:
        await _redis_pool.close()
        _redis_pool = None
    _sentinel_pool = None