import json
from pathlib import Path

from fastapi.testclient import TestClient

import app.main as main
import app.narrate as narrate
from app.ollama_client import ModelError

client = TestClient(main.app)
VALID = json.loads((Path(__file__).parent / "fixtures" / "canon_log_valid.json").read_text())


def test_valid_log_returns_prose(monkeypatch):
    monkeypatch.setattr(narrate.ollama_client, "chat", lambda *a, **k: "You stand on the wharf.")
    monkeypatch.setattr(narrate.call_log, "record", lambda **kw: None)  # keep test output pristine
    r = client.post("/dm/narrate", json={"canon_log": VALID})
    assert r.status_code == 200
    assert r.json() == {"prose": "You stand on the wharf."}


def test_model_error_maps_to_502(monkeypatch):
    def boom(*a, **k):
        raise ModelError("upstream down")

    monkeypatch.setattr(narrate.ollama_client, "chat", boom)
    monkeypatch.setattr(narrate.call_log, "record", lambda **kw: None)
    r = client.post("/dm/narrate", json={"canon_log": VALID})
    assert r.status_code == 502
    assert "model_error" in r.json()["detail"]


def test_invalid_log_still_422(monkeypatch):
    monkeypatch.setattr(narrate.ollama_client, "chat", lambda *a, **k: "x")
    bad = json.loads(json.dumps(VALID))
    bad["player"]["luck"] = 5  # §7 leak — schema rejects
    r = client.post("/dm/narrate", json={"canon_log": bad})
    assert r.status_code == 422
    assert "canon_log_errors" in r.json()["detail"]