from __future__ import annotations

import httpx

_client: httpx.AsyncClient | None = None


async def init_http_client() -> None:
    global _client
    _client = httpx.AsyncClient(
        timeout=httpx.Timeout(20.0, connect=5.0),
        follow_redirects=True,
        limits=httpx.Limits(max_connections=40, max_keepalive_connections=20),
    )


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


def get_client() -> httpx.AsyncClient:
    if _client is None:
        raise RuntimeError("HTTP client not initialized")
    return _client


async def fetch_json(url: str, params: dict | None = None, timeout: float | None = None) -> dict:
    client = get_client()
    response = await client.get(url, params=params, timeout=timeout)
    response.raise_for_status()
    return response.json()


async def fetch_text(url: str, timeout: float | None = None) -> str:
    client = get_client()
    response = await client.get(url, timeout=timeout)
    response.raise_for_status()
    return response.text