<?php

namespace Drupal\Tests\system\Functional\Entity;

use Drupal\entity_test\Entity\EntityTestMulRev;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\language\Entity\ConfigurableLanguage;
use Drupal\Tests\BrowserTestBase;

/**
 * Create a entity with revisions and test viewing, saving, reverting, and
 * deleting revisions.
 *
 * @group Entity
 */
class EntityRevisionsTest extends BrowserTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = ['entity_test', 'language'];

  /**
   * A user with permission to administer entity_test content.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $webUser;

  protected function setUp() {
    parent::setUp();

    // Create and log in user.
    $this->webUser = $this->drupalCreateUser([
      'administer entity_test content',
      'view test entity',
    ]);
    $this->drupalLogin($this->webUser);

    // Enable an additional language.
    ConfigurableLanguage::createFromLangcode('de')->save();
  }

  /**
   * Check node revision related operations.
   */
  public function testRevisions() {

    // All revisable entity variations have to have the same results.
    foreach (entity_test_entity_types(ENTITY_TEST_TYPES_REVISABLE) as $entity_type) {
      $this->runRevisionsTests($entity_type);
    }
  }

  /**
   * Executes the revision tests for the given entity type.
   *
   * @param string $entity_type
   *   The entity type to run the tests with.
   */
  protected function runRevisionsTests($entity_type) {
    // Create a translatable test field.
    $field_storage = FieldStorageConfig::create([
      'entity_type' => $entity_type,
      'field_name' => 'translatable_test_field',
      'type' => 'text',
      'cardinality' => 2,
    ]);
    $field_storage->save();

    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'label' => $this->randomMachineName(),
      'bundle' => $entity_type,
      'translatable' => TRUE,
    ]);
    $field->save();

    entity_get_form_display($entity_type, $entity_type, 'default')
      ->setComponent('translatable_test_field')
      ->save();

    /** @var \Drupal\Core\Entity\ContentEntityStorageInterface $storage */
    $storage = \Drupal::entityTypeManager()->getStorage($entity_type);

    // Create initial entity.
    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    $entity = $storage
      ->create([
        'name' => 'foo',
        'user_id' => $this->webUser->id(),
      ]);
    $entity->translatable_test_field->value = 'bar';
    $entity->addTranslation('de', ['name' => 'foo - de']);
    $entity->save();

    $values = [];
    $revision_ids = [];

    // Create three revisions.
    $revision_count = 3;
    for ($i = 0; $i < $revision_count; $i++) {
      $legacy_revision_id = $entity->revision_id->value;
      $legacy_name = $entity->name->value;
      $legacy_text = $entity->translatable_test_field->value;

      $entity = $storage->load($entity->id->value);
      $entity->setNewRevision(TRUE);
      $values['en'][$i] = [
        'name' => $this->randomMachineName(32),
        'translatable_test_field' => [
          $this->randomMachineName(32),
          $this->randomMachineName(32),
        ],
        'created' => time() + $i + 1,
      ];
      $entity->set('name', $values['en'][$i]['name']);
      $entity->set('translatable_test_field', $values['en'][$i]['translatable_test_field']);
      $entity->set('created', $values['en'][$i]['created']);
      $entity->save();
      $revision_ids[] = $entity->revision_id->value;

      // Add some values for a translation of this revision.
      if ($entity->getEntityType()->isTranslatable()) {
        $values['de'][$i] = [
          'name' => $this->randomMachineName(32),
          'translatable_test_field' => [
            $this->randomMachineName(32),
            $this->randomMachineName(32),
          ],
        ];
        $translation = $entity->getTranslation('de');
        $translation->set('name', $values['de'][$i]['name']);
        $translation->set('translatable_test_field', $values['de'][$i]['translatable_test_field']);
        $translation->save();
      }

      // Check that the fields and properties contain new content.
      $this->assertTrue($entity->revision_id->value > $legacy_revision_id, format_string('%entity_type: Revision ID changed.', ['%entity_type' => $entity_type]));
      $this->assertNotEqual($entity->name->value, $legacy_name, format_string('%entity_type: Name changed.', ['%entity_type' => $entity_type]));
      $this->assertNotEqual($entity->translatable_test_field->value, $legacy_text, format_string('%entity_type: Text changed.', ['%entity_type' => $entity_type]));
    }

    $revisions = $storage->loadMultipleRevisions($revision_ids);
    for ($i = 0; $i < $revision_count; $i++) {
      // Load specific revision.
      $entity_revision = $revisions[$revision_ids[$i]];

      // Check if properties and fields contain the revision specific content.
      $this->assertEqual($entity_revision->revision_id->value, $revision_ids[$i], format_string('%entity_type: Revision ID matches.', ['%entity_type' => $entity_type]));
      $this->assertEqual($entity_revision->name->value, $values['en'][$i]['name'], format_string('%entity_type: Name matches.', ['%entity_type' => $entity_type]));
      $this->assertEqual($entity_revision->translatable_test_field[0]->value, $values['en'][$i]['translatable_test_field'][0], format_string('%entity_type: Text matches.', ['%entity_type' => $entity_type]));
      $this->assertEqual($entity_revision->translatable_test_field[1]->value, $values['en'][$i]['translatable_test_field'][1], format_string('%entity_type: Text matches.', ['%entity_type' => $entity_type]));

      // Check the translated values.
      if ($entity->getEntityType()->isTranslatable()) {
        $revision_translation = $entity_revision->getTranslation('de');
        $this->assertEqual($revision_translation->name->value, $values['de'][$i]['name'], format_string('%entity_type: Name matches.', ['%entity_type' => $entity_type]));
        $this->assertEqual($revision_translation->translatable_test_field[0]->value, $values['de'][$i]['translatable_test_field'][0], format_string('%entity_type: Text matches.', ['%entity_type' => $entity_type]));
        $this->assertEqual($revision_translation->translatable_test_field[1]->value, $values['de'][$i]['translatable_test_field'][1], format_string('%entity_type: Text matches.', ['%entity_type' => $entity_type]));
      }

      // Check non-revisioned values are loaded.
      $this->assertTrue(isset($entity_revision->created->value), format_string('%entity_type: Non-revisioned field is loaded.', ['%entity_type' => $entity_type]));
      $this->assertEqual($entity_revision->created->value, $values['en'][2]['created'], format_string('%entity_type: Non-revisioned field value is the same between revisions.', ['%entity_type' => $entity_type]));
    }

    // Confirm the correct revision text appears in the edit form.
    $entity = $storage->load($entity->id->value);
    $this->drupalGet($entity_type . '/manage/' . $entity->id->value . '/edit');
    $this->assertFieldById('edit-name-0-value', $entity->name->value, format_string('%entity_type: Name matches in UI.', ['%entity_type' => $entity_type]));
    $this->assertFieldById('edit-translatable-test-field-0-value', $entity->translatable_test_field->value, format_string('%entity_type: Text matches in UI.', ['%entity_type' => $entity_type]));
  }

  /**
   * Tests that an entity revision is upcasted in the correct language.
   */
  public function testEntityRevisionParamConverter() {
    // Create a test entity with multiple revisions and translations for them.
    $entity = EntityTestMulRev::create([
      'name' => 'default revision - en',
      'user_id' => $this->webUser,
      'language' => 'en',
    ]);
    $entity->addTranslation('de', ['name' => 'default revision - de']);
    $entity->save();

    $pending_revision = \Drupal::entityTypeManager()->getStorage('entity_test_mulrev')->loadUnchanged($entity->id());

    $pending_revision->setNewRevision();
    $pending_revision->isDefaultRevision(FALSE);

    $pending_revision->name = 'pending revision - en';
    $pending_revision->save();

    $pending_revision_translation = $pending_revision->getTranslation('de');
    $pending_revision_translation->name = 'pending revision - de';
    $pending_revision_translation->save();

    // Check that the entity revision is upcasted in the correct language.
    $revision_url = 'entity_test_mulrev/' . $entity->id() . '/revision/' . $pending_revision->getRevisionId() . '/view';

    $this->drupalGet($revision_url);
    $this->assertText('pending revision - en');
    $this->assertNoText('pending revision - de');

    $this->drupalGet('de/' . $revision_url);
    $this->assertText('pending revision - de');
    $this->assertNoText('pending revision - en');
  }

  /**
   * Tests manual revert of the revision ID value.
   *
   * @covers \Drupal\Core\Entity\ContentEntityBase::getRevisionId
   * @covers \Drupal\Core\Entity\ContentEntityBase::getLoadedRevisionId
   * @covers \Drupal\Core\Entity\ContentEntityBase::setNewRevision
   * @covers \Drupal\Core\Entity\ContentEntityBase::isNewRevision
   */
  public function testNewRevisionRevert() {
    $entity = EntityTestMulRev::create(['name' => 'EntityLoadedRevisionTest']);
    $entity->save();

    // Check that revision ID field is reset while the loaded revision ID is
    // preserved when flagging a new revision.
    $revision_id = $entity->getRevisionId();
    $entity->setNewRevision();
    $this->assertNull($entity->getRevisionId());
    $this->assertEquals($revision_id, $entity->getLoadedRevisionId());
    $this->assertTrue($entity->isNewRevision());

    // Check that after manually restoring the original revision ID, the entity
    // is stored without creating a new revision.
    $key = $entity->getEntityType()->getKey('revision');
    $entity->set($key, $revision_id);
    $entity->save();
    $this->assertEquals($revision_id, $entity->getRevisionId());
    $this->assertEquals($revision_id, $entity->getLoadedRevisionId());

    // Check that manually restoring the original revision ID causes the "new
    // revision" state to be reverted.
    $entity->setNewRevision();
    $this->assertNull($entity->getRevisionId());
    $this->assertEquals($revision_id, $entity->getLoadedRevisionId());
    $this->assertTrue($entity->isNewRevision());
    $entity->set($key, $revision_id);
    $this->assertFalse($entity->isNewRevision());
    $this->assertEquals($revision_id, $entity->getRevisionId());
    $this->assertEquals($revision_id, $entity->getLoadedRevisionId());

    // Check that flagging a new revision again works correctly.
    $entity->setNewRevision();
    $this->assertNull($entity->getRevisionId());
    $this->assertEquals($revision_id, $entity->getLoadedRevisionId());
    $this->assertTrue($entity->isNewRevision());

    // Check that calling setNewRevision() on a new entity without a revision ID
    // and then with a revision ID does not unset the revision ID.
    $entity = EntityTestMulRev::create(['name' => 'EntityLoadedRevisionTest']);
    $entity->set('revision_id', NULL);
    $entity->set('revision_id', 5);
    $this->assertTrue($entity->isNewRevision());
    $entity->setNewRevision();
    $this->assertEquals(5, $entity->get('revision_id')->value);

  }

}