import pytest
from unittest.mock import MagicMock, patch, call
from src.gui_2 import App

@pytest.fixture
def app_instance():
 with (
  patch('src.models.load_config', return_value={'ai': {'provider': 'gemini', 'model': 'gemini-2.5-flash-lite'}, 'projects': {}}),
  patch('src.models.save_config'),
  patch('src.gui_2.project_manager'),
  patch('src.gui_2.session_logger'),
  patch('src.gui_2.immapp.run'),
  patch('src.app_controller.AppController._load_active_project'),
  patch('src.app_controller.AppController._fetch_models'),
  patch.object(App, '_load_fonts'),
  patch.object(App, '_post_init'),
  patch('src.app_controller.AppController._prune_old_logs'),
  patch('src.app_controller.AppController.start_services'),
  patch('src.api_hooks.HookServer'),
  patch('src.ai_client.set_provider'),
  patch('src.ai_client.reset_session')
 ):
  app = App()
  # Setup project discussions
  app.project = {
   "discussion": {
    "active": "main",
    "discussions": {
     "main": {"history": []},
     "take_1": {"history": []},
     "take_2": {"history": []}
    }
   }
  }
  app.active_discussion = "main"
  app.is_viewing_prior_session = False
  app.ui_disc_new_name_input = ""
  app.ui_disc_truncate_pairs = 1
  yield app

def test_render_discussion_tabs(app_instance):
 """Verify that _render_discussion_panel uses tabs for discussions."""
 with patch('src.gui_2.imgui') as mock_imgui:
  # Setup defaults for common imgui calls to avoid unpacking errors
  mock_imgui.collapsing_header.return_value = True
  mock_imgui.begin_combo.return_value = False
  mock_imgui.input_text.return_value = (False, "")
  mock_imgui.input_int.return_value = (False, 0)
  mock_imgui.button.return_value = False
  mock_imgui.checkbox.return_value = (False, False)
  mock_imgui.begin_child.return_value = True
  mock_imgui.selectable.return_value = (False, False)
  
  # Mock tab bar calls
  mock_imgui.begin_tab_bar.return_value = True
  mock_imgui.begin_tab_item.return_value = (False, False)

  app_instance._render_discussion_panel()

  # Check if begin_tab_bar was called
  # This SHOULD fail if it's not implemented yet
  mock_imgui.begin_tab_bar.assert_called_with("##discussion_tabs")
  
  # Check if begin_tab_item was called for each discussion
  names = sorted(["main", "take_1", "take_2"])
  for name in names:
   mock_imgui.begin_tab_item.assert_any_call(name)

def test_switching_discussion_via_tabs(app_instance):
 """Verify that clicking a tab switches the discussion."""
 with patch('src.gui_2.imgui') as mock_imgui, \
      patch('src.app_controller.AppController._switch_discussion') as mock_switch:
  # Setup defaults
  mock_imgui.collapsing_header.return_value = True
  mock_imgui.begin_combo.return_value = False
  mock_imgui.input_text.return_value = (False, "")
  mock_imgui.input_int.return_value = (False, 0)
  mock_imgui.button.return_value = False
  mock_imgui.checkbox.return_value = (False, False)
  mock_imgui.begin_child.return_value = True
  mock_imgui.selectable.return_value = (False, False)

  mock_imgui.begin_tab_bar.return_value = True
  
  # Simulate 'take_1' being active/selected
  def side_effect(name, flags=None):
   if name == "take_1":
    return (True, True)
   return (False, True)
  
  mock_imgui.begin_tab_item.side_effect = side_effect
  
  app_instance._render_discussion_panel()
  
  # If implemented with tabs, this should be called
  mock_switch.assert_called_with("take_1")