"""Local smoke tests with a mocked model; no downloads or expensive inference."""
import importlib
import os
import sys
import time
import types
from unittest.mock import patch

from fastapi.testclient import TestClient

sys.modules.setdefault('llama_cpp', types.SimpleNamespace(Llama=object))
app_module = importlib.import_module('app')

class DummyLlama:
    def create_chat_completion(self, messages, **kwargs):
        time.sleep(0.02)
        return {'choices': [{'message': {'content': 'We close at 3 PM on Saturday.'}}], 'usage': {'completion_tokens': 10}}


def test_api():
    with patch.dict(os.environ, {'FUGTH_API_KEY': 'dev-test-key', 'FUGTH_ADMIN_KEY': 'admin-test-key'}):
        with patch.object(app_module, 'load_one', return_value=DummyLlama()):
            with TestClient(app_module.app) as client:
                status = client.get('/health')
                assert status.status_code == 200 and status.json()['ready']
                assert set(status.json()['loaded_models']) == {'0.5b', '1.5b'}
                req = {'model': '0.5b', 'business_name': 'Example', 'message': 'When do you close?', 'context': 'Saturday 3 PM.'}
                assert client.post('/v1/chat', json=req).status_code == 401
                result = client.post('/v1/chat', headers={'X-API-Key': 'dev-test-key'}, json=req)
                assert result.status_code == 200, result.text
                assert result.json()['model'] == '0.5b'
                assert result.json()['answer'] == 'We close at 3 PM on Saturday.'
                assert client.post('/admin/default-model', json={'model': '0.5b'}).status_code == 401
                switch = client.post('/admin/default-model', headers={'X-Admin-Key': 'admin-test-key'}, json={'model': '0.5b'})
                assert switch.status_code == 200
                assert switch.json()['persisted'] is False
                req.pop('model')
                result2 = client.post('/v1/chat', headers={'X-API-Key': 'dev-test-key'}, json=req)
                assert result2.json()['model'] == '0.5b'

if __name__ == '__main__':
    test_api()
    print('All gateway smoke tests passed.')