class ThemeUninstallConfirmTest

class ThemeUninstallConfirmTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'system',
    'block',
  ];
  
  /**
   * An admin user with permission to administer themes.
   */
  protected UserInterface $adminUser;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->adminUser = $this->drupalCreateUser([
      'administer themes',
    ]);
    $this->drupalLogin($this->adminUser);
  }
  
  /**
   * Tests the theme uninstall confirmation form basic workflow.
   */
  public function testThemeUninstallConfirmForm() : void {
    \Drupal::service('theme_installer')->install([
      'claro',
    ]);
    $this->drupalGet('admin/appearance');
    $this->clickLink('Uninstall Claro theme');
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'claro',
      ],
    ]);
    $this->assertSession()
      ->pageTextContains('Uninstall Claro theme');
    $this->assertSession()
      ->pageTextContains('The Claro theme will be completely uninstalled from your site, and all data from this theme will be lost!');
    $this->assertSession()
      ->buttonExists('Uninstall');
    $this->assertSession()
      ->linkExists('Cancel');
    $this->submitForm([], 'Uninstall');
    $this->assertSession()
      ->pageTextContains('The Claro theme has been uninstalled');
    $this->assertSession()
      ->addressEquals('admin/appearance');
    $this->assertSession()
      ->linkExists('Install Claro theme');
    \Drupal::service('theme_handler')->refreshInfo();
    $themes = \Drupal::service('theme_handler')->listInfo();
    $this->assertArrayNotHasKey('claro', $themes);
  }
  
  /**
   * Tests that the default theme cannot be uninstalled.
   */
  public function testCannotUninstallDefaultTheme() : void {
    $this->drupalGet("admin/appearance/uninstall", [
      'query' => [
        'theme' => 'stark',
      ],
    ]);
    $this->assertSession()
      ->addressEquals('admin/appearance');
    $this->assertSession()
      ->pageTextContains('Stark is the default theme and cannot be uninstalled');
    \Drupal::service('theme_handler')->refreshInfo();
    $themes = \Drupal::service('theme_handler')->listInfo();
    $this->assertNotEmpty($themes['stark']->status);
  }
  
  /**
   * Tests that the admin theme cannot be uninstalled.
   */
  public function testCannotUninstallAdminTheme() : void {
    \Drupal::service('theme_installer')->install([
      'claro',
    ]);
    $this->config('system.theme')
      ->set('admin', 'claro')
      ->save();
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'claro',
      ],
    ]);
    $this->assertSession()
      ->addressEquals('admin/appearance');
    $this->assertSession()
      ->pageTextContains('Claro is the admin theme and cannot be uninstalled');
    \Drupal::service('theme_handler')->refreshInfo();
    $themes = \Drupal::service('theme_handler')->listInfo();
    $this->assertNotEmpty($themes['claro']->status);
  }
  
  /**
   * Tests that a base theme with dependent sub-themes cannot be uninstalled.
   */
  public function testCannotUninstallBaseThemeWithDependentSubThemes() : void {
    \Drupal::service('theme_installer')->install([
      'test_base_theme',
      'test_subtheme',
    ]);
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'test_base_theme',
      ],
    ]);
    $this->assertSession()
      ->addressEquals('admin/appearance');
    $this->assertSession()
      ->pageTextContains('Theme test base theme cannot be uninstalled because the following themes depend on it: Theme test subtheme');
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'test_subtheme',
      ],
    ]);
    $this->submitForm([], 'Uninstall');
    $this->assertSession()
      ->pageTextContains('The Theme test subtheme theme has been uninstalled');
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'test_base_theme',
      ],
    ]);
    $this->submitForm([], 'Uninstall');
    $this->assertSession()
      ->pageTextContains('The Theme test base theme theme has been uninstalled');
  }
  
  /**
   * Tests that configuration dependencies are displayed.
   */
  public function testConfigDependenciesDisplayed() : void {
    \Drupal::service('theme_installer')->install([
      'claro',
    ]);
    $this->drupalPlaceBlock('system_powered_by_block', [
      'region' => 'content',
      'theme' => 'claro',
      'id' => 'claro_powered_by',
      'label' => 'Powered by Claro',
    ]);
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'claro',
      ],
    ]);
    $this->assertSession()
      ->pageTextContains('Configuration deletions');
    $this->assertSession()
      ->pageTextContains('Powered by Claro');
    $this->submitForm([], 'Uninstall');
    $this->assertSession()
      ->pageTextContains('The Claro theme has been uninstalled');
    $block = \Drupal::entityTypeManager()->getStorage('block')
      ->load('claro_powered_by');
    $this->assertNull($block, 'Block config was deleted');
  }
  
  /**
   * Tests handling of invalid theme name.
   */
  public function testInvalidThemeName() : void {
    $this->drupalGet('admin/appearance/uninstall', [
      'query' => [
        'theme' => 'nonexistent',
      ],
    ]);
    $this->assertSession()
      ->addressEquals('admin/appearance');
    $this->assertSession()
      ->pageTextContains('The nonexistent theme was not found');
  }
  
  /**
   * Tests handling of missing theme parameter.
   */
  public function testMissingThemeParameter() : void {
    $this->drupalGet('admin/appearance/uninstall');
    $this->assertSession()
      ->statusCodeEquals(403);
  }

}