import os
import shutil
import tempfile
from unittest.mock import MagicMock, patch
import pytest

from src.app_controller import AppController
from src import ai_client
from src import events
from src import models

@pytest.fixture
def mock_project():
 # Use a temporary directory for the mock project
 temp_dir = tempfile.mkdtemp()
 try:
  # Create a minimal manual_slop.toml
  with open(os.path.join(temp_dir, "manual_slop.toml"), "w") as f:
   f.write('discussion_history = []\n')
  yield temp_dir
 finally:
  # Clean up after test
  shutil.rmtree(temp_dir)

def test_rag_integration(mock_project):
 """
 Integration test verifying the flow from AppController through RAGEngine to ai_client.
 """
 # 1. Initializes a mock project and AppController.
 # We patch several components to avoid side effects during initialization.
 with patch('src.app_controller.AppController._fetch_models'), \
      patch('src.models.load_config', return_value={}), \
      patch('src.paths.get_full_path_info', return_value={'logs_dir': {'path': mock_project}, 'scripts_dir': {'path': mock_project}}), \
      patch('src.theme.load_from_config'):
  app = AppController()
  # Minimal state setup for _handle_request_event
  app.ui_global_system_prompt = ""
  app.ui_project_system_prompt = ""
  app.ui_base_system_prompt = ""
  app.ui_use_default_base_prompt = True
  app.ui_project_context_marker = ""
  app.temperature = 0.0
  app.max_tokens = 100
  app.history_trunc_limit = 1000
  app.top_p = 1.0
  app.ui_agent_tools = {}
  app.ui_gemini_cli_path = "gemini"
  app.current_model = "gemini-1.5-flash"
  app.active_project_path = os.path.join(mock_project, "manual_slop.toml")
  
  # Ensure the provider is set to 'gemini' for our test
  ai_client.set_provider("gemini", "gemini-1.5-flash")

 # 2. Configures a mock RAG setup (enabled=True, provider='mock').
 rag_config = models.RAGConfig(
  enabled=True,
  vector_store=models.VectorStoreConfig(provider='mock')
 )
 app.rag_config = rag_config
 
 # 3. Mocks rag_engine.search to return a known chunk.
 mock_rag_engine = MagicMock()
 mock_rag_engine.config = rag_config
 mock_rag_engine.search.return_value = [
  {"document": "This is a retrieved chunk from RAG.", "metadata": {"path": "test_file.py"}}
 ]
 app.rag_engine = mock_rag_engine

 # 4. Mocks ai_client.send to verify that the retrieved chunk appears in the 
 # message sent to the provider. We use 'wraps' to let the real logic run 
 # while still having a mock we can inspect. We also mock the internal 
 # _send_gemini which is what actually "sends to the provider".
 with patch('src.ai_client.send', wraps=ai_client.send) as mock_send:
  with patch('src.ai_client._send_gemini') as mock_provider:
   mock_provider.return_value = "Mock AI Response"
   
   # Create a UserRequestEvent as if the user clicked "Gen + Send"
   event = events.UserRequestEvent(
    prompt="Tell me about the code.",
    stable_md="Context",
    file_items=[],
    disc_text="History",
    base_dir=mock_project
   )
   
   # Trigger the request event processing logic in AppController
   app._handle_request_event(event)
   
   # 5. This verifies the wiring from AppController through RAGEngine to ai_client.
   
   # Verify that ai_client.send was called by AppController
   assert mock_send.called
   _, kwargs = mock_send.call_args
   assert kwargs['rag_engine'] == mock_rag_engine
   
   # Verify that the internal provider call was made
   assert mock_provider.called
   
   # Extract the user_message passed to the provider call
   args, _ = mock_provider.call_args
   # _send_gemini(md_content, user_message, ...) -> user_message is index 1
   sent_user_message = args[1]
   
   # Verify that the RAG chunk was prepended to the original prompt
   assert "This is a retrieved chunk from RAG." in sent_user_message
   assert "Tell me about the code." in sent_user_message
   assert "## Retrieved Context" in sent_user_message
   assert "Source: test_file.py" in sent_user_message
   
   # Verify that rag_engine.search was called with the original prompt
   mock_rag_engine.search.assert_called_once_with("Tell me about the code.")