import json
from pathlib import Path

from fastapi.testclient import TestClient

import app.main as main
import app.npc as npc

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


def _body(**over):
    b = {"canon_log": VALID, "npc_id": "fenn", "disposition": 0,
         "available_moves": ["refuse"], "utterance": "hello"}
    b.update(over)
    return b


def test_valid_request_returns_prose(monkeypatch):
    monkeypatch.setattr(main, "npc_run", lambda **k: "Aye, well met.")
    r = client.post("/npc/speak", json=_body())
    assert r.status_code == 200
    assert r.json() == {"prose": "Aye, well met."}


def test_unknown_npc_maps_to_422(monkeypatch):
    def boom(**k):
        raise npc.UnknownNpc("nobody")
    monkeypatch.setattr(main, "npc_run", boom)
    r = client.post("/npc/speak", json=_body(npc_id="nobody"))
    assert r.status_code == 422
    assert "canon_log_errors" in r.json()["detail"]


def test_model_error_maps_to_502(monkeypatch):
    from app.ollama_client import ModelError

    def boom(**k):
        raise ModelError("down")
    monkeypatch.setattr(main, "npc_run", boom)
    r = client.post("/npc/speak", json=_body())
    assert r.status_code == 502
    assert "model_error" in r.json()["detail"]


def test_invalid_log_still_422():
    bad = json.loads(json.dumps(VALID))
    bad["player"]["luck"] = 5  # §7 leak — schema rejects
    r = client.post("/npc/speak", json=_body(canon_log=bad))
    assert r.status_code == 422
    assert "canon_log_errors" in r.json()["detail"]


def test_missing_field_is_422():
    b = _body()
    del b["utterance"]
    r = client.post("/npc/speak", json=b)
    assert r.status_code == 422