class UpdateTestBase

abstract class UpdateTestBase extends BrowserTestBase {
  use UpdateTestTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'update',
    'update_test',
  ];
  
  /**
   * Denotes a security update will be required in the test case.
   */
  const SECURITY_UPDATE_REQUIRED = 'SECURITY_UPDATE_REQUIRED';
  
  /**
   * Denotes an update will be available in the test case.
   */
  const UPDATE_AVAILABLE = 'UPDATE_AVAILABLE';
  
  /**
   * Denotes no update will be available in the test case.
   */
  const UPDATE_NONE = 'UPDATE_NONE';
  
  /**
   * The CSS locator for the update table run asserts on.
   *
   * @var string
   */
  protected $updateTableLocator;
  
  /**
   * The project that is being tested.
   *
   * @var string
   */
  protected $updateProject;
  
  /**
   * Refreshes the update status based on the desired available update scenario.
   *
   * @param $xml_map
   *   Array that maps project names to availability scenarios to fetch. The key
   *   '#all' is used if a project-specific mapping is not defined.
   * @param $url
   *   (optional) A string containing the URL to fetch update data from.
   *   Defaults to 'update-test'.
   *
   * @see \Drupal\update_test\Controller\UpdateTestController::updateTest()
   */
  protected function refreshUpdateStatus($xml_map, $url = 'update-test') {
    // Tell the Update Manager module to fetch from the URL provided by
    // update_test module.
    $this->config('update.settings')
      ->set('fetch.url', Url::fromUri('base:' . $url, [
      'absolute' => TRUE,
    ])->toString())
      ->save();
    // Save the map for UpdateTestController::updateTest() to use.
    $this->mockReleaseHistory($xml_map);
    // Manually check the update status.
    $this->drupalGet('admin/reports/updates');
    $this->clickLink('Check manually');
    $this->checkForMetaRefresh();
  }
  
  /**
   * Runs a series of assertions that are applicable to all update statuses.
   */
  protected function standardTests() {
    $this->assertSession()
      ->responseContains('<h3>Drupal core</h3>');
    // Verify that the link to the Drupal project appears.
    $this->assertSession()
      ->linkExists('Drupal');
    $this->assertSession()
      ->linkByHrefExists('http://example.com/project/drupal');
    $this->assertSession()
      ->pageTextNotContains('No available releases found');
    $this->assertSession()
      ->pageTextContains('Last checked:');
    // No download URLs should be present.
    $this->assertSession()
      ->responseNotContains('.tar.gz');
  }
  
  /**
   * Asserts the expected security updates are displayed correctly on the page.
   *
   * @param string $project_path_part
   *   The project path part needed for the release link.
   * @param string[] $expected_security_releases
   *   The security releases, if any, that the status report should recommend.
   * @param string $expected_update_message_type
   *   The type of update message expected.
   * @param string $update_element_css_locator
   *   The CSS locator for the page element that contains the security updates.
   */
  protected function assertSecurityUpdates($project_path_part, array $expected_security_releases, $expected_update_message_type, $update_element_css_locator) {
    $assert_session = $this->assertSession();
    $page = $this->getSession()
      ->getPage();
    $this->standardTests();
    $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Not supported');
    $all_security_release_urls = array_map(function ($link) {
      return $link->getAttribute('href');
    }, $page->findAll('css', "{$update_element_css_locator} .version-security a[href\$='-release']"));
    if ($expected_security_releases) {
      $expected_release_urls = [];
      if ($expected_update_message_type === static::SECURITY_UPDATE_REQUIRED) {
        $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Update available');
        $assert_session->elementTextContains('css', $update_element_css_locator, 'Security update required!');
        // Verify that the error icon is found.
        $assert_session->responseContains('error.svg');
      }
      else {
        $assert_session->elementTextContains('css', $update_element_css_locator, 'Update available');
        $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Security update required!');
      }
      $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Up to date');
      foreach ($expected_security_releases as $expected_security_release) {
        $expected_url_version = str_replace('.', '-', $expected_security_release);
        $release_url = "http://example.com/{$project_path_part}-{$expected_url_version}-release";
        $assert_session->responseNotContains("http://example.com/{$project_path_part}-{$expected_url_version}.tar.gz");
        $expected_release_urls[] = $release_url;
        // Ensure the expected links are security links.
        $this->assertContains($release_url, $all_security_release_urls, "Release {$release_url} is a security release link.");
        $assert_session->linkByHrefExists($release_url);
      }
      // Ensure no other links are shown as security releases.
      $this->assertEquals([], array_diff($all_security_release_urls, $expected_release_urls));
    }
    else {
      // Ensure there were no security links.
      $this->assertEquals([], $all_security_release_urls);
      $assert_session->pageTextNotContains('Security update required!');
      if ($expected_update_message_type === static::UPDATE_AVAILABLE) {
        $assert_session->elementTextContains('css', $update_element_css_locator, 'Update available');
        $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Up to date');
      }
      elseif ($expected_update_message_type === static::UPDATE_NONE) {
        $assert_session->elementTextNotContains('css', $update_element_css_locator, 'Update available');
        $assert_session->elementTextContains('css', $update_element_css_locator, 'Up to date');
      }
      else {
        $this->fail('Unexpected value for $expected_update_message_type: ' . $expected_update_message_type);
      }
    }
  }
  
  /**
   * Asserts that an update version has the correct links.
   *
   * @param string $label
   *   The label for the update.
   * @param string $version
   *   The project version.
   * @param int $index
   *   (optional) The index of the link.
   */
  protected function assertVersionUpdateLinks($label, $version, int $index = 0) {
    $update_element = $this->findUpdateElementByLabel($label, $index);
    // In the release notes URL the periods are replaced with dashes.
    $url_version = str_replace('.', '-', $version);
    $this->assertEquals($update_element->findLink($version)
      ->getAttribute('href'), "http://example.com/{$this->updateProject}-{$url_version}-release");
    $this->assertStringNotContainsString("http://example.com/{$this->updateProject}-{$version}.tar.gz", $update_element->getOuterHtml());
    $this->assertEquals($update_element->findLink('Release notes')
      ->getAttribute('href'), "http://example.com/{$this->updateProject}-{$url_version}-release");
  }
  
  /**
   * Confirms messages are correct when a release has been unpublished/revoked.
   *
   * @param string $revoked_version
   *   The revoked version that is currently installed.
   * @param string $newer_version
   *   The expected newer version to recommend.
   * @param string $new_version_label
   *   The expected label for the newer version (for example 'Recommended
   *   version:' or 'Also available:').
   */
  protected function confirmRevokedStatus($revoked_version, $newer_version, $new_version_label) {
    $this->drupalGet('admin/reports/updates');
    $this->clickLink('Check manually');
    $this->checkForMetaRefresh();
    $this->assertUpdateTableTextContains('Revoked!');
    $this->assertUpdateTableTextContains($revoked_version);
    $this->assertUpdateTableElementContains('error.svg');
    $this->assertUpdateTableTextContains('Release revoked: Your currently installed release has been revoked, and is no longer available for download. Uninstalling everything included in this release or upgrading is strongly recommended!');
    $this->assertVersionUpdateLinks($new_version_label, $newer_version);
  }
  
  /**
   * Confirms messages are correct when a release has been marked unsupported.
   *
   * @param string $unsupported_version
   *   The unsupported version that is currently installed.
   * @param string|null $newer_version
   *   (optional) The expected newer version to recommend.
   * @param string|null $new_version_label
   *   (optional) The expected label for the newer version. For example
   *   'Recommended version:' or 'Also available:'.
   */
  protected function confirmUnsupportedStatus(string $unsupported_version, ?string $newer_version = NULL, ?string $new_version_label = NULL) {
    $this->drupalGet('admin/reports/updates');
    $this->clickLink('Check manually');
    $this->checkForMetaRefresh();
    $this->assertUpdateTableTextContains('Not supported!');
    $this->assertUpdateTableTextContains($unsupported_version);
    $this->assertUpdateTableElementContains('error.svg');
    if ($newer_version === NULL) {
      $this->assertUpdateTableTextContains('Release not supported: Your currently installed release is now unsupported, is no longer available for download and no update is available. Uninstalling everything included in this release is strongly recommended!');
      $this->assertUpdateTableTextNotContains('Recommended version');
    }
    else {
      $this->assertNotEmpty($newer_version);
      $this->assertUpdateTableTextContains('Release not supported: Your currently installed release is now unsupported, and is no longer available for download. Uninstalling everything included in this release or upgrading is strongly recommended!');
      $this->assertVersionUpdateLinks($new_version_label, $newer_version);
    }
  }
  
  /**
   * Asserts that the update table text contains the specified text.
   *
   * @param string $text
   *   The expected text.
   *
   * @see \Behat\Mink\WebAssert::elementTextContains()
   */
  protected function assertUpdateTableTextContains($text) {
    $this->assertSession()
      ->elementTextContains('css', $this->updateTableLocator, $text);
  }
  
  /**
   * Asserts that the update table text does not contain the specified text.
   *
   * @param string $text
   *   The expected text.
   */
  protected function assertUpdateTableTextNotContains($text) {
    $this->assertSession()
      ->elementTextNotContains('css', $this->updateTableLocator, $text);
  }
  
  /**
   * Asserts that the update table element HTML contains the specified text.
   *
   * @param string $text
   *   The expected text.
   *
   * @see \Behat\Mink\WebAssert::elementContains()
   */
  protected function assertUpdateTableElementContains($text) {
    $this->assertSession()
      ->elementContains('css', $this->updateTableLocator, $text);
  }
  
  /**
   * Asserts that the update table element HTML contains the specified text.
   *
   * @param string $text
   *   The expected text.
   *
   * @see \Behat\Mink\WebAssert::elementNotContains()
   */
  protected function assertUpdateTableElementNotContains($text) {
    $this->assertSession()
      ->elementNotContains('css', $this->updateTableLocator, $text);
  }
  
  /**
   * Finds an update page element by label.
   *
   * @param string $label
   *   The label for the update, for example "Recommended version:" or
   *   "Latest version:".
   * @param int $index
   *   (optional) The index of the element.
   *
   * @return \Behat\Mink\Element\NodeElement
   *   The update element.
   */
  protected function findUpdateElementByLabel($label, int $index = 0) {
    $update_elements = $this->getSession()
      ->getPage()
      ->findAll('css', $this->updateTableLocator . " .project-update__version:contains(\"{$label}\")");
    $this->assertGreaterThanOrEqual($index, count($update_elements));
    return $update_elements[$index];
  }

}