from __future__ import annotations
import json
import urllib.request

FEATHERLESS_API_BASE = "https://api.featherless.ai/v1"

def generate(model_id: str, prompt: str, system: str = "",
             api_key: str = "", max_tokens: int = 1024, temperature: float = 0.3) -> str:
    """Featherless.ai (OpenAI-compatible) — Nemotron reasoning tasks."""
    url = f"{FEATHERLESS_API_BASE}/chat/completions"
    messages = []
    if system:
        messages.append({"role": "system", "content": system})
    messages.append({"role": "user", "content": prompt})
    payload = {"model": model_id, "messages": messages,
               "max_tokens": max_tokens, "temperature": temperature}
    data = json.dumps(payload).encode("utf-8")
    headers = {"Content-Type": "application/json",
               "Authorization": f"Bearer {api_key}"}
    req = urllib.request.Request(url, data=data, headers=headers, method="POST")
    with urllib.request.urlopen(req, timeout=120) as resp:
        result = json.loads(resp.read().decode("utf-8"))
    return result["choices"][0]["message"]["content"]