from __future__ import annotations

import json
import os
from urllib import request

from .models import BlockCandidate, Finding


def ollama_summary(findings: list[Finding], candidates: list[BlockCandidate], model: str | None = None) -> str:
    host = os.getenv("OLLAMA_HOST", "http://127.0.0.1:11434").rstrip("/")
    selected_model = model or os.getenv("OLLAMA_MODEL", "llama3.3")
    prompt = {
        "findings": [finding.__dict__ for finding in findings],
        "block_candidates": [
            {"src_ip": candidate.src_ip, "score": candidate.score, "reasons": candidate.reasons}
            for candidate in candidates
        ],
    }
    body = json.dumps(
        {
            "model": selected_model,
            "stream": False,
            "prompt": (
                "You are a local FortiGate security analyst. Summarize these policy findings "
                "and UTM block candidates. Be concise, include risk, likely cause, and next action. "
                f"Data: {json.dumps(prompt)}"
            ),
        }
    ).encode("utf-8")
    req = request.Request(f"{host}/api/generate", data=body, method="POST", headers={"Content-Type": "application/json"})
    with request.urlopen(req, timeout=60) as response:
        data = json.loads(response.read().decode("utf-8"))
    return str(data.get("response", "")).strip()