"""HTTP client for the Nous inference chat completions API."""

from __future__ import annotations

import os

import httpx

_DEFAULT_UA = "osint-dashboard-news-summarizer"
_DEFAULT_BASE = "https://inference-api.nousresearch.com/v1"


def chat(prompt, *, api_key, model, base_url, json_mode=False) -> str:
    resolved = (base_url or os.environ.get("NOUS_BASE_URL", _DEFAULT_BASE)).rstrip("/")
    url = f"{resolved}/chat/completions"
    headers = {
        "Authorization": f"Bearer {api_key}",
        "User-Agent": os.environ.get("OSINT_USER_AGENT") or _DEFAULT_UA,
    }
    payload = {
        "model": model,
        "messages": [{"role": "user", "content": prompt}],
        "temperature": 0.2,
        "max_tokens": 4096,
    }
    if json_mode:
        payload["response_format"] = {"type": "json_object"}
    try:
        with httpx.Client(timeout=60.0) as client:
            resp = client.post(url, headers=headers, json=payload)
        if resp.status_code == 401 or resp.status_code >= 500:
            return ""
        data = resp.json()
        return data["choices"][0]["message"]["content"]
    except Exception:
        return ""