class CKEditor5TestBase

abstract class CKEditor5TestBase extends WebDriverTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'ckeditor5',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        $this->drupalLogin($this->drupalCreateUser([
            'administer filters',
            'create page content',
            'edit own page content',
        ]));
    }
    
    /**
     * Add and save a new text format using CKEditor 5.
     */
    protected function addNewTextFormat($name = 'ckeditor5') : void {
        FilterFormat::create([
            'format' => $name,
            'roles' => [
                RoleInterface::AUTHENTICATED_ID,
            ],
            'name' => $name,
            'filters' => [
                'filter_html' => [
                    'status' => TRUE,
                    'settings' => [
                        'allowed_html' => '<br> <p> <h2> <h3> <h4> <h5> <h6> <strong> <em>',
                    ],
                ],
                'filter_align' => [
                    'status' => TRUE,
                ],
                'filter_caption' => [
                    'status' => TRUE,
                ],
            ],
        ])->save();
        Editor::create([
            'editor' => $name,
            'format' => $name,
            'image_upload' => [
                'status' => FALSE,
            ],
        ])->save();
    }
    
    /**
     * Create a new text format using CKEditor 5.
     */
    public function createNewTextFormat($page, $assert_session, $name = 'ckeditor5') {
        $this->drupalGet('admin/config/content/formats/add');
        $page->fillField('name', $name);
        $assert_session->waitForText('Machine name');
        $this->assertNotEmpty($assert_session->waitForText($name));
        $page->checkField('roles[authenticated]');
        if ($name === 'ckeditor5') {
            // Enable the HTML filter, at least one HTML restricting filter is needed
            // before CKEditor 5 can be enabled.
            $this->assertTrue($page->hasUncheckedField('filters[filter_html][status]'));
            $page->checkField('filters[filter_html][status]');
            // Add the tags that must be included in the html filter for CKEditor 5.
            $allowed_html_field = $assert_session->fieldExists('filters[filter_html][settings][allowed_html]');
            $allowed_html_field->setValue('<p> <br>');
        }
        $page->selectFieldOption('editor[editor]', $name);
        $assert_session->assertExpectedAjaxRequest(1);
    }
    
    /**
     * Save the new text format.
     */
    public function saveNewTextFormat($page, $assert_session) {
        $page->pressButton('Save configuration');
        $this->assertTrue($assert_session->waitForText('Added text format'), "Confirm new text format saved");
    }
    
    /**
     * Trigger a keyup event on the selected element.
     *
     * @param string $selector
     *   The css selector for the element.
     * @param string $key
     *   The keyCode.
     */
    protected function triggerKeyUp(string $selector, string $key) {
        $script = <<<JS
(function (selector, key) {
  const btn = document.querySelector(selector);
    btn.dispatchEvent(new KeyboardEvent('keydown', { key }));
    btn.dispatchEvent(new KeyboardEvent('keyup', { key }));
})('{<span class="php-variable">$selector</span>}', '{<span class="php-variable">$key</span>}')

JS;
        $options = [
            'script' => $script,
            'args' => [],
        ];
        $this->getSession()
            ->getDriver()
            ->getWebDriverSession()
            ->execute($options);
    }
    
    /**
     * Decorates ::fieldValueEquals() to force DrupalCI to provide useful errors.
     *
     * @param string $field
     *   Field id|name|label|value.
     * @param string $value
     *   Field value.
     * @param \Behat\Mink\Element\TraversableElement $container
     *   Document to check against.
     *
     * @throws \Behat\Mink\Exception\ExpectationException
     *
     * @see \Behat\Mink\WebAssert::fieldValueEquals()
     */
    protected function assertHtmlEsqueFieldValueEquals($field, $value, ?TraversableElement $container = NULL) {
        $assert_session = $this->assertSession();
        $node = $assert_session->fieldExists($field, $container);
        $actual = $node->getValue();
        $regex = '/^' . preg_quote($value, '/') . '$/ui';
        $message = sprintf('The field "%s" value is "%s", but "%s" expected.', $field, htmlspecialchars($actual), htmlspecialchars($value));
        $assert_session->assert((bool) preg_match($regex, $actual), $message);
    }
    
    /**
     * Checks that no real-time validation errors are present.
     *
     * @throws \Behat\Mink\Exception\ElementNotFoundException
     */
    protected function assertNoRealtimeValidationErrors() : void {
        $assert_session = $this->assertSession();
        $this->assertSame('', $assert_session->elementExists('css', '[data-drupal-selector="ckeditor5-realtime-validation-messages-container"]')
            ->getHtml());
    }

}