<?php

/**
 * Tests the Google Tag Manager.
 *
 * @todo
 * Use the settings form to save configuration and create snippet files.
 * Confirm snippet file and page response contents.
 *
 * Test further the snippet insertion conditions.
 */
class GTMBaseTestCase extends DrupalWebTestCase {

  /**
   * The message group, base path to snippet files, and snippet file types.
   *
   * @var string|array
   */
  protected $group = 'Google Tag module';
  protected $basePath = 'public:/';
  protected $types = array('script', 'noscript');

  /**
   * Modules to enable.
   *
   * @var array
   */
  protected $modules = array('google_tag');

  /**
   * {@inheritdoc}
   */
  public static function getInfo() {
    return array(
      'name' => 'Google Tag Manager :: Base',
      'description' => 'Tests the Google Tag Manager [do NOT select this: no tests]',
      'group' => 'Google tag',
    );
  }

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp($this->modules);
  }

  /**
   * Test the module.
   */
  public function testModule() {
    if (get_class($this) == 'GTMBaseTestCase') {
      $this->assertTrue(TRUE, t('No assertions on base test class'), $this->group);
      return;
    }

    try {
      $this->modifySettings();
      // Create containers in code.
      $this->createData();
      $this->saveContainers();
      $this->checkSnippetFiles();
      $this->checkPageResponse();
      // Delete containers.
      $this->deleteContainers();
      // Create containers in user interface.
      $this->submitContainers();
      $this->checkSnippetFiles();
      $this->checkPageResponse();
    }
    catch (Exception $e) {
      $this->assertTrue(TRUE, t('Inside CATCH block'), $this->group);
      watchdog_exception('gtm_test', $e);
    }
    finally {
      $this->assertTrue(TRUE, t('Inside FINALLY block'), $this->group);
    }
  }

  /**
   * Modify settings for test purposes.
   */
  protected function modifySettings() {
    // Modify default settings.
    // These should propagate to each container created in test.
    $settings = \GTMSettings::getInstance();
    $settings->flush_snippets = 1;
    $settings->debug_output = 1;
    $settings->role_toggle = 'include listed';
    $settings->role_list = array('content viewer' => 'content viewer');
    $settings->save();
  }

  /**
   * Create test data: configuration variables.
   */
  protected function createData() {
  }

  /**
   * Save containers in the database and create snippet files.
   */
  protected function saveContainers() {
    foreach ($this->variables as $key => $variables) {
      $export = new GTMContainerExport();
      $default = $export->default_container();
      unset($default->data, $default->export_type, $default->type);

      array_walk($variables, function ($value, $key) use ($default) {
        $default->$key = $value;
      });
      // Save container.
      $container = new GTMContainer((array) $default);
      $container->save(NULL);

      // Create snippet files.
      $manager = \GTMContainerManager::getInstance();
      $manager->createAssets($container);
    }
  }

  /**
   * Delete containers from the database and delete snippet files.
   */
  protected function deleteContainers() {
    // Delete containers.
    foreach ($this->variables as $key => $variables) {
      $container = new GTMContainer(array(), $key);
      $container->delete();
    }

    // Confirm no containers.
    $manager = \GTMContainerManager::getInstance();
    $containers = $manager->loadContainers();
    $message = 'No containers found after delete';
    $this->assert(empty($containers), $message, $this->group);

    // Delete snippet files.
    $directory = \GTMSettings::getInstance()->get('uri');
    if (\GTMSettings::getInstance()->get('flush_snippets')) {
      if (!empty($directory)) {
        // Remove any stale files (e.g. module update or machine name change).
        file_unmanaged_delete_recursive($directory . '/google_tag');
      }
    }

    // Confirm no snippet files.
    $message = 'No snippet files found after delete';
    $this->assert(!is_dir($directory . '/google_tag'), $message, $this->group);
  }

  /**
   * Add containers through user interface.
   */
  protected function submitContainers() {
    // Create and login an admin user.
    $role_id = $this->drupalCreateRole(array('access content', 'administer google tag manager'), 'admin user');
    $admin_user = $this->drupalCreateUser();
    $admin_user->roles[$role_id] = 'admin user';
    user_save($admin_user);
    $this->drupalLogin($admin_user);

    foreach ($this->variables as $key => $variables) {
      $edit = (array) $variables;
      unset($edit['status']);
      if (isset($edit['realm_list'])) {
        $realm = current($edit['realm_list']);
        $edit["realm_list[$realm]"] = $realm;
        unset($edit['realm_list']);
      }

      $this->drupalGet('/admin/config/system/google_tag/add');
      $this->drupalPost(NULL, $edit, 'Save');

      $text = 'Created @count snippet files for %container container based on configuration.';
      $args = array('@count' => 3, '%container' => $variables->label);
      $text = t($text, $args);
      $message = 'Found snippet confirmation message in page response';
      $this->assertRaw($text, $message, $this->group);

      $text = 'Created @count snippet files for @container container based on configuration.';
      $args = array('@count' => 3, '@container' => $variables->label);
      $text = t($text, $args);
      $this->assertText($text, $message, $this->group);
    }
  }

  /**
   * Inspect the snippet files.
   */
  protected function checkSnippetFiles() {
  }

  /**
   * Verify the snippet file contents.
   */
  protected function verifyScriptSnippet($contents, $variables) {
    $status = strpos($contents, "'$variables->container_id'") !== FALSE;
    $message = 'Found in script snippet file: container_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_preview=$variables->environment_id") !== FALSE;
    $message = 'Found in script snippet file: environment_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_auth=$variables->environment_token") !== FALSE;
    $message = 'Found in script snippet file: environment_token';
    $this->assert($status, $message, $this->group);
  }

  /**
   * Verify the snippet file contents.
   */
  protected function verifyNoScriptSnippet($contents, $variables) {
    $status = strpos($contents, "id=$variables->container_id") !== FALSE;
    $message = 'Found in noscript snippet file: container_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_preview=$variables->environment_id") !== FALSE;
    $message = 'Found in noscript snippet file: environment_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_auth=$variables->environment_token") !== FALSE;
    $message = 'Found in noscript snippet file: environment_token';
    $this->assert($status, $message, $this->group);
  }

  /**
   * Verify the snippet file contents.
   */
  protected function verifyDataLayerSnippet($contents, $variables) {
  }

  /**
   * Inspect the page response.
   */
  protected function checkPageResponse() {
    // Create and login a test user.
    $role_id = $this->drupalCreateRole(array('access content'), 'content viewer');
    $non_admin_user = $this->drupalCreateUser();
    $non_admin_user->roles[$role_id] = 'content viewer';
    user_save($non_admin_user);
    $this->drupalLogin($non_admin_user);
  }

  /**
   * Verify the tag in page response.
   */
  protected function verifyScriptTag($realpath) {
    $string = variable_get('css_js_query_string', '');
    $text = "src=\"$realpath?$string\"";
    $message = 'Found script source string in page response';
    $this->assertRaw($text, $message, $this->group);

    $xpath = "//script[@src=\"$realpath?$string\"]";
    $elements = $this->xpath($xpath);
    $status = !empty($elements);
    $message = 'Found script tag in page response';
    $this->assert($status, $message, $this->group);
  }

  /**
   * Verify the tag in page response.
   */
  protected function verifyNoScriptTag($realpath, $variables) {
    $xpath = '//div//noscript//iframe';
    $elements = $this->xpath($xpath);

    $contents = (array) $elements[0]['src'];
    $contents = $contents[0];

    $status = strpos($contents, "id=$variables->container_id") !== FALSE;
    $message = 'Found in noscript tag: container_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_preview=$variables->environment_id") !== FALSE;
    $message = 'Found in noscript tag: environment_id';
    $this->assert($status, $message, $this->group);

    $status = strpos($contents, "gtm_auth=$variables->environment_token") !== FALSE;
    $message = 'Found in noscript tag: environment_token';
    $this->assert($status, $message, $this->group);
  }

}