"""GET/PUT /settings/llm — 요약 모델 런타임 전환과 .env 영속화."""
from __future__ import annotations

import pytest
from fastapi.testclient import TestClient

from config.settings import settings


@pytest.fixture()
def client(tmp_path, monkeypatch):
    import query.api as api

    monkeypatch.setattr(settings, "database_url", f"sqlite:///{tmp_path / 'index.db'}")
    monkeypatch.setattr(settings, "llm_model", "minimax/minimax-m2.7:free")
    env = tmp_path / ".env"
    env.write_text("LLM_BASE_URL=https://x\nLLM_MODEL=minimax/minimax-m2.7:free\n", encoding="utf-8")
    monkeypatch.setattr(api, "ENV_PATH", env)
    return TestClient(api.app), env


def test_get_and_put_model(client):
    c, env = client
    assert c.get("/settings/llm").json()["model"] == "minimax/minimax-m2.7:free"

    r = c.put("/settings/llm", json={"model": "z-ai/glm-5.2"})
    assert r.status_code == 200 and r.json() == {"model": "z-ai/glm-5.2"}
    assert settings.llm_model == "z-ai/glm-5.2"  # 즉시 반영
    text = env.read_text(encoding="utf-8")
    assert "LLM_MODEL=z-ai/glm-5.2" in text
    assert "LLM_BASE_URL=https://x" in text  # 다른 줄은 보존
    assert text.count("LLM_MODEL=") == 1


def test_put_model_rejects_bad_input(client):
    c, env = client
    for bad in ("", "  ", "a b", "x\nLLM_API_KEY=evil", "한글모델"):
        assert c.put("/settings/llm", json={"model": bad}).status_code == 400
    assert settings.llm_model == "minimax/minimax-m2.7:free"
    assert "evil" not in env.read_text(encoding="utf-8")