"""
HTTP client management for shared AsyncClient instance.
"""
import httpx
from typing import Optional

# Global HTTP client instance
_http_client: Optional[httpx.AsyncClient] = None


async def init_http_client():
    """Initialize the shared HTTP client."""
    global _http_client
    if _http_client is None:
        _http_client = httpx.AsyncClient(
            timeout=httpx.Timeout(10.0, connect=5.0),
            limits=httpx.Limits(max_keepalive_connections=20, max_connections=100)
        )


async def close_http_client():
    """Close the shared HTTP client."""
    global _http_client
    if _http_client:
        await _http_client.aclose()
        _http_client = None


def get_http_client() -> Optional[httpx.AsyncClient]:
    """Get the shared HTTP client instance."""
    return _http_client