import unittest
from fastapi.testclient import TestClient
import gui_2
from unittest.mock import patch, MagicMock

class TestHeadlessAPI(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        # We need an App instance to initialize the API, but we want to avoid GUI stuff
        with patch('gui_2.session_logger.open_session'), \
             patch('gui_2.ai_client.set_provider'), \
             patch('gui_2.session_logger.close_session'):
            cls.app_instance = gui_2.App()
            # We will implement create_api method in App
            if hasattr(cls.app_instance, 'create_api'):
                cls.api = cls.app_instance.create_api()
            else:
                cls.api = MagicMock()
            cls.client = TestClient(cls.api)

    def test_health_endpoint(self):
        response = self.client.get("/health")
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json(), {"status": "ok"})

    def test_status_endpoint_unauthorized(self):
        # Ensure a key is required
        with patch.dict(self.app_instance.config, {"headless": {"api_key": "some-required-key"}}):
            response = self.client.get("/status")
            self.assertEqual(response.status_code, 403)

    def test_status_endpoint_authorized(self):
        # We'll use a test key
        headers = {"X-API-KEY": "test-secret-key"}
        with patch.dict(self.app_instance.config, {"headless": {"api_key": "test-secret-key"}}):
            response = self.client.get("/status", headers=headers)
            self.assertEqual(response.status_code, 200)

    def test_generate_endpoint(self):
        payload = {
            "prompt": "Hello AI"
        }
        # Mock ai_client.send and get_comms_log
        with patch('gui_2.ai_client.send') as mock_send, \
             patch('gui_2.ai_client.get_comms_log') as mock_log:
            mock_send.return_value = "Hello from Mock AI"
            mock_log.return_value = [{
                "kind": "response",
                "payload": {
                    "usage": {"input_tokens": 10, "output_tokens": 5}
                }
            }]
            
            response = self.client.post("/api/v1/generate", json=payload)
            self.assertEqual(response.status_code, 200)
            data = response.json()
            self.assertEqual(data["text"], "Hello from Mock AI")
            self.assertIn("metadata", data)
            self.assertEqual(data["usage"]["input_tokens"], 10)

if __name__ == "__main__":
    unittest.main()