class LayoutBuilderDefaultValuesTest

class LayoutBuilderDefaultValuesTest extends BrowserTestBase {
    use ImageFieldCreationTrait;
    use TestFileCreationTrait {
        getTestFiles as drupalGetTestFiles;
    }
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'layout_builder',
        'block',
        'node',
        'image',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->createContentType([
            'type' => 'test_node_type',
            'name' => 'Test Node Type',
        ]);
        $this->addTextFields();
        $this->addImageFields();
        // Create node 1 with specific values.
        $this->createNode([
            'type' => 'test_node_type',
            'title' => 'Test Node 1 Has Values',
            'field_string_no_default' => 'No default, no problem.',
            'field_string_with_default' => 'It is ok to be different',
            'field_string_with_callback' => 'Not from a callback',
            'field_string_late_default' => 'I am way ahead of you.',
            'field_image_with_default' => [
                'target_id' => 2,
                'alt' => 'My different alt text',
            ],
            'field_image_no_default' => [
                'target_id' => 3,
                'alt' => 'My third alt text',
            ],
        ]);
        // Create node 2 relying on defaults.
        $this->createNode([
            'type' => 'test_node_type',
            'title' => 'Test Node 2 Uses Defaults',
        ]);
        // Add default value to field_string_late_default.
        $field = FieldConfig::loadByName('node', 'test_node_type', 'field_string_late_default');
        $field->setDefaultValue('Too late!');
        $field->save();
    }
    
    /**
     * Tests display of default field values.
     */
    public function testDefaultValues() {
        // Begin by viewing nodes with Layout Builder disabled.
        $this->assertNodeWithValues();
        $this->assertNodeWithDefaultValues();
        // Enable layout builder.
        LayoutBuilderEntityViewDisplay::load('node.test_node_type.default')->enableLayoutBuilder()
            ->save();
        // Confirm that default values are handled consistently by Layout Builder.
        $this->assertNodeWithValues();
        $this->assertNodeWithDefaultValues();
    }
    
    /**
     * Test for expected text on node 1.
     */
    protected function assertNodeWithValues() {
        $this->drupalGet('node/1');
        $assert_session = $this->assertSession();
        // String field with no default should render a value.
        $assert_session->pageTextContains('field_string_no_default');
        $assert_session->pageTextContains('No default, no problem.');
        // String field with default should render non-default value.
        $assert_session->pageTextContains('field_string_with_default');
        $assert_session->pageTextNotContains('This is my default value');
        $assert_session->pageTextContains('It is ok to be different');
        // String field with callback should render non-default value.
        $assert_session->pageTextContains('field_string_with_callback');
        $assert_session->pageTextNotContains('This is from my default value callback');
        $assert_session->pageTextContains('Not from a callback');
        // String field with "late" default should render non-default value.
        $assert_session->pageTextContains('field_string_late_default');
        $assert_session->pageTextNotContains('Too late!');
        $assert_session->pageTextContains('I am way ahead of you');
        // Image field with default should render non-default value.
        $assert_session->pageTextContains('field_image_with_default');
        $assert_session->responseNotContains('My default alt text');
        $assert_session->responseNotContains('test-file-1');
        $assert_session->responseContains('My different alt text');
        $assert_session->responseContains('test-file-2');
        // Image field with no default should render a value.
        $assert_session->pageTextContains('field_image_no_default');
        $assert_session->responseContains('My third alt text');
        $assert_session->responseContains('test-file-3');
    }
    
    /**
     * Test for expected text on node 2.
     */
    protected function assertNodeWithDefaultValues() {
        $this->drupalGet('node/2');
        $assert_session = $this->assertSession();
        // String field with no default should not render.
        $assert_session->pageTextNotContains('field_string_no_default');
        // String with default value should render with default value.
        $assert_session->pageTextContains('field_string');
        $assert_session->pageTextContains('This is my default value');
        // String field with callback should render value from callback.
        $assert_session->pageTextContains('field_string_with_callback');
        $assert_session->pageTextContains('This is from my default value callback');
        // String field with "late" default should not render.
        $assert_session->pageTextNotContains('field_string_late_default');
        $assert_session->pageTextNotContains('Too late!');
        // Image field with default should render default value.
        $assert_session->pageTextContains('field_image_with_default');
        $assert_session->responseContains('My default alt text');
        $assert_session->responseContains('test-file-1');
        // Image field with no default should not render.
        $assert_session->pageTextNotContains('field_image_no_default');
    }
    
    /**
     * Helper function to add string fields.
     */
    protected function addTextFields() {
        // String field with no default.
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'field_string_no_default',
            'entity_type' => 'node',
            'type' => 'string',
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => 'test_node_type',
        ]);
        $field->save();
        // String field with default value.
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'field_string_with_default',
            'entity_type' => 'node',
            'type' => 'string',
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => 'test_node_type',
        ]);
        $field->setDefaultValue('This is my default value');
        $field->save();
        // String field with default callback.
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'field_string_with_callback',
            'entity_type' => 'node',
            'type' => 'string',
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => 'test_node_type',
        ]);
        $field->setDefaultValueCallback('Drupal\\Tests\\layout_builder\\Functional\\LayoutBuilderDefaultValuesTest::defaultValueCallback');
        $field->save();
        // String field with late default. We will set default later.
        $field_storage = FieldStorageConfig::create([
            'field_name' => 'field_string_late_default',
            'entity_type' => 'node',
            'type' => 'string',
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => 'test_node_type',
        ]);
        $field->save();
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        $display_repository->getViewDisplay('node', 'test_node_type')
            ->setComponent('field_string_no_default', [
            'type' => 'string',
        ])
            ->setComponent('field_string_with_default', [
            'type' => 'string',
        ])
            ->setComponent('field_string_with_callback', [
            'type' => 'string',
        ])
            ->setComponent('field_string_late_default', [
            'type' => 'string',
        ])
            ->save();
    }
    
    /**
     * Helper function to add image fields.
     */
    protected function addImageFields() {
        // Create files to use as the default images.
        $files = $this->drupalGetTestFiles('image');
        $images = [];
        for ($i = 1; $i <= 3; $i++) {
            $filename = "test-file-{$i}";
            $desired_filepath = 'public://' . $filename;
            \Drupal::service('file_system')->copy($files[0]->uri, $desired_filepath, FileSystemInterface::EXISTS_ERROR);
            $file = File::create([
                'uri' => $desired_filepath,
                'filename' => $filename,
                'name' => $filename,
            ]);
            $file->save();
            $images[] = $file;
        }
        $field_name = 'field_image_with_default';
        $storage_settings['default_image'] = [
            'uuid' => $images[0]->uuid(),
            'alt' => 'My default alt text',
            'title' => '',
            'width' => 0,
            'height' => 0,
        ];
        $field_settings['default_image'] = [
            'uuid' => $images[0]->uuid(),
            'alt' => 'My default alt text',
            'title' => '',
            'width' => 0,
            'height' => 0,
        ];
        $widget_settings = [
            'preview_image_style' => 'medium',
        ];
        $this->createImageField($field_name, 'test_node_type', $storage_settings, $field_settings, $widget_settings);
        $field_name = 'field_image_no_default';
        $storage_settings = [];
        $field_settings = [];
        $widget_settings = [
            'preview_image_style' => 'medium',
        ];
        $this->createImageField($field_name, 'test_node_type', $storage_settings, $field_settings, $widget_settings);
    }
    
    /**
     * Sample 'default value' callback.
     */
    public static function defaultValueCallback(FieldableEntityInterface $entity, FieldDefinitionInterface $definition) {
        return [
            [
                'value' => 'This is from my default value callback',
            ],
        ];
    }

}