# File: orchestrator/client.py
import requests
import uuid

class MCPClient:
    """
    Minimal JSON-RPC 2.0 client for MCP servers.
    """
    def __init__(self, base_url: str):
        self.base_url = base_url.rstrip('/')

    def call(self, method: str, params: dict = None):
        payload = {
            'jsonrpc': '2.0',
            'id': str(uuid.uuid4()),
            'method': method,
            'params': params or {}
        }
        response = requests.post(f"{self.base_url}/rpc", json=payload, timeout=30)
        response.raise_for_status()
        data = response.json()
        if 'error' in data:
            err = data['error']
            raise RuntimeError(err.get('message', str(err)))
        return data.get('result')