"""
Comprehensive tests for _test_reset module to achieve 100% coverage.
"""

import pytest
from unittest.mock import Mock, patch, MagicMock
import os


class TestTestResetComplete:
    """Comprehensive test suite for _test_reset module."""
    
    def setup_method(self):
        """Set up test fixtures."""
        # Clear any existing AI environment variables
        self.original_env = {}
        for key in list(os.environ.keys()):
            if key.startswith('AI_'):
                self.original_env[key] = os.environ.pop(key)
    
    def teardown_method(self):
        """Clean up after tests."""
        # Restore original environment variables
        for key, value in self.original_env.items():
            os.environ[key] = value
        # Clear any test environment variables
        for key in list(os.environ.keys()):
            if key.startswith('AI_'):
                os.environ.pop(key, None)
    
    @patch('ai_utilities._test_reset._reset_ai_settings_cache')
    @patch('ai_utilities._test_reset._reset_provider_factory_state')
    @patch('ai_utilities._test_reset._reset_config_resolver_caches')
    @patch('ai_utilities._test_reset._reset_contextvar_state')
    def test_reset_global_state_for_tests_success(self, mock_reset_context, mock_reset_config, 
                                                mock_reset_provider, mock_reset_settings):
        """Test successful reset of global state."""
        # Call the function
        from ai_utilities._test_reset import reset_global_state_for_tests
        reset_global_state_for_tests()
        
        # Verify all reset functions are called
        mock_reset_settings.assert_called_once()
        mock_reset_provider.assert_called_once()
        mock_reset_config.assert_called_once()
        mock_reset_context.assert_called_once()
    
    @patch('ai_utilities._test_reset._reset_ai_settings_cache')
    @patch('ai_utilities._test_reset._reset_provider_factory_state')
    @patch('ai_utilities._test_reset._reset_config_resolver_caches')
    @patch('ai_utilities._test_reset._reset_contextvar_state')
    def test_reset_global_state_for_tests_with_exceptions(self, mock_reset_context, mock_reset_config, 
                                                        mock_reset_provider, mock_reset_settings):
        """Test reset global state handles exceptions gracefully."""
        # Configure mocks to raise exceptions
        mock_reset_settings.side_effect = Exception("Settings error")
        mock_reset_provider.side_effect = Exception("Provider error")
        mock_reset_config.side_effect = Exception("Config error")
        mock_reset_context.side_effect = Exception("Context error")
        
        # Call the function - should not raise exceptions
        from ai_utilities._test_reset import reset_global_state_for_tests
        
        # Should not raise any exceptions despite individual failures
        reset_global_state_for_tests()
        
        # Verify all functions were still called
        mock_reset_settings.assert_called_once()
        mock_reset_provider.assert_called_once()
        mock_reset_config.assert_called_once()
        mock_reset_context.assert_called_once()
    
    def test_reset_ai_settings_cache_with_model_config(self):
        """Test resetting AiSettings cache when model_config exists."""
        with patch('ai_utilities.config_models.AiSettings') as mock_ai_settings:
            # Configure mock with model_config (dict, no _env_file_cache)
            mock_ai_settings.model_config = {}
            mock_ai_settings._cached_settings = Mock()
            
            # Call the function
            from ai_utilities._test_reset import _reset_ai_settings_cache
            _reset_ai_settings_cache()
            
            # Verify only _cached_settings is cleared (model_config is a dict, no _env_file_cache)
            mock_ai_settings._cached_settings.clear.assert_called_once()
    
    def test_reset_ai_settings_cache_without_model_config(self):
        """Test resetting AiSettings cache when model_config doesn't exist."""
        with patch('ai_utilities.config_models.AiSettings') as mock_ai_settings:
            # Configure mock without model_config
            del mock_ai_settings.model_config
            mock_ai_settings._cached_settings = Mock()
            
            # Call the function
            from ai_utilities._test_reset import _reset_ai_settings_cache
            _reset_ai_settings_cache()
            
            # Verify only cached_settings is cleared
            mock_ai_settings._cached_settings.clear.assert_called_once()
    
    def test_reset_ai_settings_cache_no_attributes(self):
        """Test resetting AiSettings cache when no cache attributes exist."""
        with patch('ai_utilities.config_models.AiSettings') as mock_ai_settings:
            # Configure mock with no cache attributes
            del mock_ai_settings.model_config
            del mock_ai_settings._cached_settings
            
            # Call the function - should not raise exceptions
            from ai_utilities._test_reset import _reset_ai_settings_cache
            _reset_ai_settings_cache()
    
    def test_reset_ai_settings_cache_with_exception(self):
        """Test resetting AiSettings cache handles exceptions."""
        with patch('ai_utilities.config_models.AiSettings') as mock_ai_settings:
            # Configure mock to raise exception
            mock_ai_settings.model_config = Mock()
            mock_ai_settings.model_config._env_file_cache = Mock()
            mock_ai_settings.model_config._env_file_cache.clear.side_effect = Exception("Clear error")
            
            # Call the function - should not raise exceptions
            from ai_utilities._test_reset import _reset_ai_settings_cache
            _reset_ai_settings_cache()
    
    def test_reset_provider_factory_state_success(self):
        """Test successful reset of provider factory state."""
        # Since there's no ProviderFactory class in the actual module,
        # this test verifies the reset function handles the missing import gracefully
        from ai_utilities._test_reset import _reset_provider_factory_state
        
        # Should not raise an exception even though ProviderFactory doesn't exist
        _reset_provider_factory_state()
        
        # If we get here, the reset handled the missing import correctly
        assert True
    
    def test_reset_provider_factory_state_no_instance(self):
        """Test reset provider factory when _instance doesn't exist."""
        # Since there's no ProviderFactory class, this test verifies 
        # the reset function handles the missing import gracefully
        from ai_utilities._test_reset import _reset_provider_factory_state
        
        # Should not raise an exception even though ProviderFactory doesn't exist
        _reset_provider_factory_state()
        
        # If we get here, the reset handled the missing import correctly
        assert True
    
    def test_reset_provider_factory_state_import_error(self):
        """Test reset provider factory handles ImportError."""
        # Since there's no ProviderFactory class, this test verifies 
        # the reset function handles the missing import gracefully
        from ai_utilities._test_reset import _reset_provider_factory_state
        
        # Should not raise an exception even though ProviderFactory doesn't exist
        _reset_provider_factory_state()
        
        # If we get here, the reset handled the missing import correctly
        assert True
    
    def test_reset_config_resolver_caches_success(self):
        """Test successful reset of config resolver caches."""
        # Since there's no ConfigResolver class, this test verifies 
        # the reset function handles the missing import gracefully
        from ai_utilities._test_reset import _reset_config_resolver_caches
        
        # Should not raise an exception even though ConfigResolver doesn't exist
        _reset_config_resolver_caches()
        
        # If we get here, the reset handled the missing import correctly
        assert True
    
    def test_reset_config_resolver_caches_import_error(self):
        """Test reset config resolver handles ImportError."""
        # Since there's no ConfigResolver class, this test verifies 
        # the reset function handles the missing import gracefully
        from ai_utilities._test_reset import _reset_config_resolver_caches
        
        # Should not raise an exception even though ConfigResolver doesn't exist
        _reset_config_resolver_caches()
        
        # If we get here, the reset handled the missing import correctly
        assert True
    
    def test_reset_contextvar_state_success(self):
        """Test successful reset of contextvar state."""
        with patch('ai_utilities.env_overrides._reset_all_overrides') as mock_reset:
            # Call the function
            from ai_utilities._test_reset import _reset_contextvar_state
            _reset_contextvar_state()
            
            # Verify reset function is called
            mock_reset.assert_called_once()
    
    def test_reset_contextvar_state_import_error(self):
        """Test reset contextvar state handles ImportError."""
        with patch('ai_utilities.env_overrides._reset_all_overrides', side_effect=ImportError("Module not found")):
            # Call the function - should not raise exceptions
            from ai_utilities._test_reset import _reset_contextvar_state
            _reset_contextvar_state()
    
    def test_get_current_global_state_with_ai_env_vars(self):
        """Test getting current global state with AI environment variables."""
        # Set up test environment variables
        os.environ['AI_API_KEY'] = 'test-key'
        os.environ['AI_MODEL'] = 'gpt-4'
        os.environ['AI_BASE_URL'] = 'https://api.test.com'
        os.environ['OTHER_VAR'] = 'should-not-appear'
        
        with patch('ai_utilities.env_overrides.get_env_overrides', return_value={'AI_TEMPERATURE': '0.5'}):
            # Call the function
            from ai_utilities._test_reset import get_current_global_state
            result = get_current_global_state()
            
            # Verify result
            assert 'ai_environment_vars' in result
            assert 'contextvar_overrides' in result
            
            # Check AI environment variables
            ai_env = result['ai_environment_vars']
            assert ai_env['AI_API_KEY'] == 'test-key'
            assert ai_env['AI_MODEL'] == 'gpt-4'
            assert ai_env['AI_BASE_URL'] == 'https://api.test.com'
            assert 'OTHER_VAR' not in ai_env
            
            # Check contextvar overrides
            assert result['contextvar_overrides'] == {'AI_TEMPERATURE': '0.5'}
    
    def test_get_current_global_state_no_ai_env_vars(self):
        """Test getting current global state with no AI environment variables."""
        with patch('ai_utilities.env_overrides.get_env_overrides', return_value={}):
            # Call the function
            from ai_utilities._test_reset import get_current_global_state
            result = get_current_global_state()
            
            # Verify result
            assert result['ai_environment_vars'] == {}
            assert result['contextvar_overrides'] == {}
    
    def test_get_current_global_state_import_error(self):
        """Test getting global state when env_overrides module not available."""
        with patch('ai_utilities.env_overrides.get_env_overrides', side_effect=ImportError("Module not found")):
            # Call the function
            from ai_utilities._test_reset import get_current_global_state
            result = get_current_global_state()
            
            # Verify result handles import error gracefully
            assert result['ai_environment_vars'] == {}
            assert result['contextvar_overrides'] == {}
    
    def test_get_current_global_state_empty_environment(self):
        """Test getting global state with empty environment."""
        # Ensure no AI environment variables
        for key in list(os.environ.keys()):
            if key.startswith('AI_'):
                os.environ.pop(key, None)
        
        with patch('ai_utilities.env_overrides.get_env_overrides', return_value={'AI_TIMEOUT': '30'}):
            # Call the function
            from ai_utilities._test_reset import get_current_global_state
            result = get_current_global_state()
            
            # Verify result
            assert result['ai_environment_vars'] == {}
            assert result['contextvar_overrides'] == {'AI_TIMEOUT': '30'}
    
    def test_reset_global_state_multiple_calls(self):
        """Test that reset_global_state_for_tests can be called multiple times."""
        with patch('ai_utilities._test_reset._reset_ai_settings_cache') as mock_settings, \
             patch('ai_utilities._test_reset._reset_provider_factory_state') as mock_provider, \
             patch('ai_utilities._test_reset._reset_config_resolver_caches') as mock_config, \
             patch('ai_utilities._test_reset._reset_contextvar_state') as mock_context:
            
            # Call the function multiple times
            from ai_utilities._test_reset import reset_global_state_for_tests
            
            reset_global_state_for_tests()
            reset_global_state_for_tests()
            reset_global_state_for_tests()
            
            # Verify all functions were called three times
            assert mock_settings.call_count == 3
            assert mock_provider.call_count == 3
            assert mock_config.call_count == 3
            assert mock_context.call_count == 3
