"""Chat endpoint tests."""

from __future__ import annotations

import os

import pytest
from fastapi.testclient import TestClient


def _client_with_bypass():
    os.environ["DEV_AUTH_BYPASS"] = "true"
    os.environ["ANTHROPIC_API_KEY"] = ""
    from app.config import get_settings
    get_settings.cache_clear()
    import importlib
    import app.main as main_mod
    importlib.reload(main_mod)
    return TestClient(main_mod.app, base_url="https://testserver")


def teardown_module(_mod):
    os.environ["DEV_AUTH_BYPASS"] = "false"
    os.environ.pop("ANTHROPIC_API_KEY", None)
    from app.config import get_settings
    get_settings.cache_clear()
    import importlib
    import app.main as main_mod
    importlib.reload(main_mod)


def test_chat_503_when_no_api_key():
    c = _client_with_bypass()
    r = c.post("/api/chat", json={
        "messages": [{"role": "user", "content": "hi"}],
    })
    assert r.status_code == 503
    body = r.json()
    assert "AI chat is not configured" in body["detail"]


def test_chat_400_when_empty_messages():
    # Even with the key set, we should refuse empty messages.
    os.environ["DEV_AUTH_BYPASS"] = "true"
    os.environ["ANTHROPIC_API_KEY"] = "sk-test"
    from app.config import get_settings
    get_settings.cache_clear()
    import importlib
    import app.main as main_mod
    importlib.reload(main_mod)
    c = TestClient(main_mod.app, base_url="https://testserver")
    r = c.post("/api/chat", json={"messages": []})
    # 422 from pydantic validation or 400 from our own check — either is acceptable.
    assert r.status_code in (400, 422)