import sys
from unittest.mock import patch, MagicMock
import pytest
from pathlib import Path

# Mock tkinter and other GUI/macOS specific imports
sys.modules['tkinter'] = MagicMock()
sys.modules['tkinter.ttk'] = MagicMock()
sys.modules['tkinter.scrolledtext'] = MagicMock()
sys.modules['tkinter.messagebox'] = MagicMock()
sys.modules['Foundation'] = MagicMock()
sys.modules['AppKit'] = MagicMock()
sys.modules['PIL'] = MagicMock()
sys.modules['PIL.Image'] = MagicMock()
sys.modules['PIL.ImageTk'] = MagicMock()

import install
from install import ProleInstaller

@pytest.fixture
def mock_installer(tmp_path):
    test_cfg_src = Path(__file__).parent / "fixtures" / "test-prole.cfg"
    cfg_path = tmp_path / "prole.cfg"
    cfg_path.write_text(test_cfg_src.read_text())
    
    with patch('install.tk.Tk'), \
         patch('install.tk.Frame'), \
         patch('install.tk.Canvas'), \
         patch('install.tk.Label'), \
         patch('install.tk.Button'), \
         patch('install.tk.StringVar'), \
         patch('install.tk.BooleanVar'), \
         patch('install.tk.IntVar'), \
         patch('install.ttk.Style'), \
         patch('install.Path.exists', return_value=True):
        
        root = MagicMock()
        root.winfo_screenwidth.return_value = 1920
        root.winfo_screenheight.return_value = 1080
        
        app = ProleInstaller(root, config_path=str(cfg_path))
        app.bg_canvas.winfo_width.return_value = 1000
        return app

def test_service_layer_navigation_pause(mock_installer):
    # Go to init_cluster
    mock_installer.show_page('init_cluster')
    
    # Mock cluster ready
    with patch.object(mock_installer, '_cluster_ready_for_navigation', return_value=True):
        # Click Next - should NOT go to init_password yet, but show overlay
        with patch.object(mock_installer, '_run_service_layer_overlay') as mock_overlay:
            mock_installer.on_next()
            mock_overlay.assert_called_once()
            assert mock_installer.pages[mock_installer.page_index][0] == 'init_cluster'

def test_service_layer_overlay_behavior(mock_installer):
    mock_installer.show_page('init_cluster')
    
    # Trigger overlay
    with patch.object(mock_installer, '_cluster_ready_for_navigation', return_value=True), \
         patch.object(mock_installer, '_create_console_output'):
        mock_installer.on_next()
    
    assert mock_installer._showing_service_overlay is True
    assert mock_installer._common_services_success is False
    
    # Next button should be disabled via update_footer
    mock_installer.next_button = MagicMock()
    mock_installer.prev_button = MagicMock()
    mock_installer.update_footer()
    mock_installer.next_button.configure.assert_any_call(state='disabled')

    # Simulate success
    mock_installer._common_services_success = True
    mock_installer.next_button.reset_mock()
    mock_installer.update_footer()
    mock_installer.next_button.configure.assert_any_call(state='normal')
    
    # Now Next should proceed
    with patch.object(mock_installer, '_cluster_ready_for_navigation', return_value=True):
        mock_installer.on_next()
        assert mock_installer.pages[mock_installer.page_index][0] == 'init_password'

def test_service_layer_prev_behavior(mock_installer):
    mock_installer.show_page('init_cluster')
    with patch.object(mock_installer, '_cluster_ready_for_navigation', return_value=True), \
         patch.object(mock_installer, '_create_console_output'):
        mock_installer.on_next()
    
    assert mock_installer._showing_service_overlay is True
    
    # Prev from overlay should go back to init_cluster and reset overlay flag
    mock_installer.on_prev()
    assert mock_installer._showing_service_overlay is False
    assert mock_installer.pages[mock_installer.page_index][0] == 'init_cluster'