# mcp/clients.py
import os, httpx, asyncio
from functools import lru_cache
from typing import Any, Dict

class APIError(Exception): pass

class BaseClient:
    def __init__(self, base: str, api_key_env: str = None):
        self.base = base
        self.key = os.getenv(api_key_env) if api_key_env else None
        self._client = httpx.AsyncClient(timeout=10)

    async def request(self, method: str, path: str, **kwargs) -> Any:
        # automatically attach API key if present
        if self.key:
            if "headers" not in kwargs: kwargs["headers"] = {}
            kwargs["headers"]["Authorization"] = f"Bearer {self.key}"
        url = f"{self.base.rstrip('/')}/{path.lstrip('/')}"
        resp = await self._client.request(method, url, **kwargs)
        try:
            resp.raise_for_status()
        except httpx.HTTPStatusError as e:
            raise APIError(f"{resp.status_code} @ {url}") from e
        # auto-parse JSON or text
        ct = resp.headers.get("Content-Type","")
        return resp.json() if ct.startswith("application/json") else resp.text

    async def close(self):
        await self._client.aclose()