class AdminUiTest

class AdminUiTest extends CKEditor5TestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'media_library',
        'editor_test',
        'ckeditor5_incompatible_filter_test',
    ];
    
    /**
     * Confirm settings only trigger AJAX when select value is CKEditor 5.
     */
    public function testSettingsOnlyFireAjaxWithCkeditor5() {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->addNewTextFormat($page, $assert_session);
        $this->addNewTextFormat($page, $assert_session, 'unicorn');
        $this->drupalGet('admin/config/content/formats/manage/ckeditor5');
        // Enable media embed to trigger an AJAX rebuild.
        $this->assertTrue($page->hasUncheckedField('filters[media_embed][status]'));
        $this->assertSame(0, $this->getAjaxResponseCount());
        $page->checkField('filters[media_embed][status]');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertSame(1, $this->getAjaxResponseCount());
        // Perform the same steps as above with CKEditor, and confirm AJAX callbacks
        // are not triggered on settings changes.
        $this->drupalGet('admin/config/content/formats/manage/unicorn');
        // Enable media embed to confirm a format not using CKEditor 5 will not
        // trigger an AJAX rebuild.
        $this->assertTrue($page->hasUncheckedField('filters[media_embed][status]'));
        $page->checkField('filters[media_embed][status]');
        $this->assertSame(0, $this->getAjaxResponseCount());
        // Confirm that AJAX updates happen when attempting to switch to CKEditor 5,
        // even if prevented from doing so by validation.
        $this->drupalGet('admin/config/content/formats/add');
        $page->fillField('name', 'trigger validator');
        $assert_session->waitForText('Machine name');
        $page->checkField('roles[authenticated]');
        // Enable a filter that is incompatible with CKEditor 5, so validation is
        // triggered when attempting to switch.
        $incompatible_filter_name = 'filters[filter_incompatible][status]';
        $this->assertTrue($page->hasUncheckedField($incompatible_filter_name));
        $page->checkField($incompatible_filter_name);
        $this->assertSame(0, $this->getAjaxResponseCount());
        $page->selectFieldOption('editor[editor]', 'ckeditor5');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertSame(1, $this->getAjaxResponseCount());
        $filter_warning = 'CKEditor 5 only works with HTML-based text formats. The "A TYPE_MARKUP_LANGUAGE filter incompatible with CKEditor 5" (filter_incompatible) filter implies this text format is not HTML anymore.';
        // The presence of this validation error message confirms the AJAX callback
        // was invoked.
        $assert_session->pageTextContains($filter_warning);
        // Disable the incompatible filter. This should trigger another AJAX rebuild
        // which will include the removal of the validation error as the issue has
        // been corrected.
        $this->assertTrue($page->hasCheckedField($incompatible_filter_name));
        $page->uncheckField($incompatible_filter_name);
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertSame(2, $this->getAjaxResponseCount());
        $assert_session->pageTextNotContains($filter_warning);
    }
    
    /**
     * Gets the Drupal AJAX response count observed on this page.
     *
     * @return int
     *   The number of completed XHR requests observed since the page was loaded.
     */
    protected function getAjaxResponseCount() : int {
        // Half a second should suffice for any of the test's DOM interactions to
        // have triggered an AJAX request, if any.
        try {
            $this->assertSession()
                ->assertWaitOnAjaxRequest(500);
        } catch (\RuntimeException $e) {
            throw new \LogicException('An AJAX request was still being processed, this suggests a assertWaitOnAjaxRequest() call is missing.');
        }
        // Now that there definitely is no more AJAX request in progress, count the
        // number of AJAX responses.
        $javascript = <<<JS
(function(){
  return window.performance
    .getEntries()
    .filter(entry => entry.initiatorType === 'xmlhttprequest' && entry.name.indexOf('_wrapper_format=drupal_ajax') !== -1)
    .length
})()
JS;
        return $this->getSession()
            ->evaluateScript($javascript);
    }
    
    /**
     * CKEditor 5's filter UI modifications should not break it for other editors.
     */
    public function testUnavailableFiltersHiddenWhenSwitching() {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->createNewTextFormat($page, $assert_session, 'unicorn');
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->pageTextNotContains('Filter settings');
        // Switching to CKEditor 5 should keep the filter settings hidden.
        $page->selectFieldOption('editor[editor]', 'ckeditor5');
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->pageTextNotContains('Filter settings');
    }
    
    /**
     * Test that filter settings are only visible when the filter is enabled.
     */
    public function testFilterCheckboxesToggleSettings() {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->createNewTextFormat($page, $assert_session);
        $assert_session->assertWaitOnAjaxRequest();
        $media_tab = $page->find('css', '[href^="#edit-filters-media-embed-settings"]');
        $this->assertFalse($media_tab->isVisible(), 'Media filter settings should not be present because media filter is not enabled');
        $this->assertTrue($page->hasUncheckedField('filters[media_embed][status]'));
        $page->checkField('filters[media_embed][status]');
        $assert_session->assertWaitOnAjaxRequest();
        $media_tab = $assert_session->waitForElementVisible('css', '[href^="#edit-filters-media-embed-settings"]');
        $this->assertTrue($media_tab->isVisible(), 'Media settings should appear when media filter enabled');
        $page->uncheckField('filters[media_embed][status]');
        $assert_session->assertWaitOnAjaxRequest();
        $media_tab = $page->find('css', '[href^="#edit-filters-media-embed-settings"]');
        $this->assertFalse($media_tab->isVisible(), 'Media settings should be removed when media filter disabled');
    }
    
    /**
     * Ensure CKEditor 5 admin UI's real-time validation errors do not accumulate.
     */
    public function testMessagesDoNotAccumulate() : void {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->addNewTextFormat($page, $assert_session);
        $this->drupalGet('admin/config/content/formats/manage/ckeditor5');
        // Add the source editing plugin to the CKEditor 5 toolbar.
        $this->assertNotEmpty($assert_session->waitForElement('css', '.ckeditor5-toolbar-item-sourceEditing'));
        $this->triggerKeyUp('.ckeditor5-toolbar-item-sourceEditing', 'ArrowDown');
        $assert_session->assertWaitOnAjaxRequest();
        $find_validation_error_messages = function () use ($page) : array {
            return $page->findAll('css', '[role=alert]:contains("The following tag(s) are already supported by enabled plugins and should not be added to the Source Editing "Manually editable HTML tags" field: Bold (<strong>).")');
        };
        // No validation errors when we start.
        $this->assertCount(0, $find_validation_error_messages());
        // Configure Source Editing to allow editing `<strong>` to trigger
        // validation error.
        $assert_session->waitForText('Source editing');
        $page->find('css', '[href^="#edit-editor-settings-plugins-ckeditor5-sourceediting"]')
            ->click();
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->waitForText('Manually editable HTML tags');
        $source_edit_tags_field = $assert_session->fieldExists('editor[settings][plugins][ckeditor5_sourceEditing][allowed_tags]');
        $source_edit_tags_field->setValue('<strong>');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertCount(1, $find_validation_error_messages());
        // Revert Source Editing it: validation messages should be gone.
        $source_edit_tags_field->setValue('');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertCount(0, $find_validation_error_messages());
        // Add `<strong>` again: validation messages should be back.
        $source_edit_tags_field->setValue('<strong>');
        $assert_session->assertWaitOnAjaxRequest();
        $this->assertCount(1, $find_validation_error_messages());
    }
    
    /**
     * Tests the plugin settings form section.
     */
    public function testPluginSettingsFormSection() {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->createNewTextFormat($page, $assert_session);
        $assert_session->assertWaitOnAjaxRequest();
        // The default toolbar only enables the configurable heading plugin and the
        // non-configurable bold and italic plugins.
        $assert_session->fieldValueEquals('editor[settings][toolbar][items]', '["heading","bold","italic"]');
        // The heading plugin config form should be present.
        $assert_session->elementExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-heading"]');
        // Remove the heading plugin from the toolbar.
        $this->triggerKeyUp('.ckeditor5-toolbar-item-heading', 'ArrowUp');
        $assert_session->assertWaitOnAjaxRequest();
        // The heading plugin config form should no longer be present.
        $assert_session->elementNotExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-heading"]');
        // The plugin settings wrapper should still be present, but empty.
        $assert_session->elementExists('css', '#plugin-settings-wrapper');
        $assert_session->elementNotContains('css', '#plugin-settings-wrapper', '<div');
        // Enable the source plugin.
        $this->triggerKeyUp('.ckeditor5-toolbar-item-sourceEditing', 'ArrowDown');
        $assert_session->assertWaitOnAjaxRequest();
        // The source plugin config form should be present.
        $assert_session->elementExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-sourceediting"]');
        // The filter-dependent configurable plugin should not be present.
        $assert_session->elementNotExists('css', '[data-drupal-selector="edit-editor-settings-plugins-media-media"]');
        // Enable the filter that the configurable plugin depends on.
        $this->assertTrue($page->hasUncheckedField('filters[media_embed][status]'));
        $page->checkField('filters[media_embed][status]');
        $assert_session->assertWaitOnAjaxRequest();
        // The filter-dependent configurable plugin should be present.
        $assert_session->elementExists('css', '[data-drupal-selector="edit-editor-settings-plugins-media-media"]');
    }
    
    /**
     * Tests the language config form.
     */
    public function testLanguageConfigForm() {
        $page = $this->getSession()
            ->getPage();
        $assert_session = $this->assertSession();
        $this->createNewTextFormat($page, $assert_session);
        $assert_session->assertWaitOnAjaxRequest();
        // The language plugin config form should not be present.
        $assert_session->elementNotExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-language"]');
        $this->assertNotEmpty($assert_session->waitForElement('css', '.ckeditor5-toolbar-item-textPartLanguage'));
        $this->triggerKeyUp('.ckeditor5-toolbar-item-textPartLanguage', 'ArrowDown');
        $assert_session->assertWaitOnAjaxRequest();
        // The CKEditor 5 module should warn that `<span>` cannot be created.
        $assert_session->waitForElement('css', '[role=alert][data-drupal-message-type="warning"]:contains("The Language plugin needs another plugin to create <span>, for it to be able to create the following attributes: <span lang dir>. Enable a plugin that supports creating this tag. If none exists, you can configure the Source Editing plugin to support it.")');
        // Make `<span>` creatable.
        $this->assertNotEmpty($assert_session->elementExists('css', '.ckeditor5-toolbar-item-sourceEditing'));
        $this->triggerKeyUp('.ckeditor5-toolbar-item-sourceEditing', 'ArrowDown');
        $assert_session->assertWaitOnAjaxRequest();
        // The Source Editing plugin settings form should now be present and should
        // have no allowed tags configured.
        $page->clickLink('Source editing');
        $this->assertNotNull($assert_session->waitForElementVisible('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-sourceediting-allowed-tags"]'));
        $javascript = <<<JS
      const allowedTags = document.querySelector('[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-sourceediting-allowed-tags"]');
      allowedTags.value = '<span>';
      allowedTags.dispatchEvent(new Event('input'));
JS;
        $this->getSession()
            ->executeScript($javascript);
        // Dispatching an `input` event does not work in WebDriver. Enabling another
        // toolbar item which has no associated HTML elements forces it.
        $this->triggerKeyUp('.ckeditor5-toolbar-item-undo', 'ArrowDown');
        $assert_session->assertWaitOnAjaxRequest();
        // Confirm there are no longer any warnings.
        $assert_session->waitForElementRemoved('css', '[data-drupal-messages] [role="alert"]');
        // The language plugin config form should now be present.
        $assert_session->elementExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-language"]');
        // It must also be possible to remove the language plugin again.
        $this->triggerKeyUp('.ckeditor5-toolbar-item-textPartLanguage', 'ArrowUp');
        $assert_session->assertWaitOnAjaxRequest();
        // The language plugin config form should not be present anymore.
        $assert_session->elementNotExists('css', '[data-drupal-selector="edit-editor-settings-plugins-ckeditor5-language"]');
    }

}