class FieldTranslationsTestCase extends FieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field translations tests',
      'description' => 'Test multilanguage fields logic.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('locale', 'field_test');

    $this->field_name = drupal_strtolower($this->randomName() . '_field_name');

    $this->entity_type = 'test_entity';

    $field = array(
      'field_name' => $this->field_name,
      'type' => 'test_field',
      'cardinality' => 4,
      'translatable' => TRUE,
    );
    field_create_field($field);
    $this->field = field_read_field($this->field_name);

    $instance = array(
      'field_name' => $this->field_name,
      'entity_type' => $this->entity_type,
      'bundle' => 'test_bundle',
    );
    field_create_instance($instance);
    $this->instance = field_read_instance('test_entity', $this->field_name, 'test_bundle');

    require_once DRUPAL_ROOT . '/includes/locale.inc';
    for ($i = 0; $i < 3; ++$i) {
      locale_add_language('l' . $i, $this->randomString(), $this->randomString());
    }
  }

  /**
   * Ensures that only valid values are returned by field_available_languages().
   */
  function testFieldAvailableLanguages() {
    // Test 'translatable' fieldable info.
    field_test_entity_info_translatable('test_entity', FALSE);
    $field = $this->field;
    $field['field_name'] .= '_untranslatable';

    // Enable field translations for the entity.
    field_test_entity_info_translatable('test_entity', TRUE);

    // Test hook_field_languages() invocation on a translatable field.
    variable_set('field_test_field_available_languages_alter', TRUE);
    $enabled_languages = field_content_languages();
    $available_languages = field_available_languages($this->entity_type, $this->field);
    foreach ($available_languages as $delta => $langcode) {
      if ($langcode != 'xx' && $langcode != 'en') {
        $this->assertTrue(in_array($langcode, $enabled_languages), format_string('%language is an enabled language.', array('%language' => $langcode)));
      }
    }
    $this->assertTrue(in_array('xx', $available_languages), format_string('%language was made available.', array('%language' => 'xx')));
    $this->assertFalse(in_array('en', $available_languages), format_string('%language was made unavailable.', array('%language' => 'en')));

    // Test field_available_languages() behavior for untranslatable fields.
    $this->field['translatable'] = FALSE;
    field_update_field($this->field);
    $available_languages = field_available_languages($this->entity_type, $this->field);
    $this->assertTrue(count($available_languages) == 1 && $available_languages[0] === LANGUAGE_NONE, 'For untranslatable fields only LANGUAGE_NONE is available.');
  }

  /**
   * Test the multilanguage logic of _field_invoke().
   */
  function testFieldInvoke() {
    // Enable field translations for the entity.
    field_test_entity_info_translatable('test_entity', TRUE);

    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);

    // Populate some extra languages to check if _field_invoke() correctly uses
    // the result of field_available_languages().
    $values = array();
    $extra_languages = mt_rand(1, 4);
    $languages = $available_languages = field_available_languages($this->entity_type, $this->field);
    for ($i = 0; $i < $extra_languages; ++$i) {
      $languages[] = $this->randomName(2);
    }

    // For each given language provide some random values.
    foreach ($languages as $langcode) {
      for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
        $values[$langcode][$delta]['value'] = mt_rand(1, 127);
      }
    }
    $entity->{$this->field_name} = $values;

    $results = _field_invoke('test_op', $entity_type, $entity);
    foreach ($results as $langcode => $result) {
      $hash = hash('sha256', serialize(array($entity_type, $entity, $this->field_name, $langcode, $values[$langcode])));
      // Check whether the parameters passed to _field_invoke() were correctly
      // forwarded to the callback function.
      $this->assertEqual($hash, $result, format_string('The result for %language is correctly stored.', array('%language' => $langcode)));
    }

    $this->assertEqual(count($results), count($available_languages), 'No unavailable language has been processed.');
  }

  /**
   * Test the multilanguage logic of _field_invoke_multiple().
   */
  function testFieldInvokeMultiple() {
    // Enable field translations for the entity.
    field_test_entity_info_translatable('test_entity', TRUE);

    $values = array();
    $options = array();
    $entities = array();
    $entity_type = 'test_entity';
    $entity_count = 5;
    $available_languages = field_available_languages($this->entity_type, $this->field);

    for ($id = 1; $id <= $entity_count; ++$id) {
      $entity = field_test_create_stub_entity($id, $id, $this->instance['bundle']);
      $languages = $available_languages;

      // Populate some extra languages to check whether _field_invoke()
      // correctly uses the result of field_available_languages().
      $extra_languages = mt_rand(1, 4);
      for ($i = 0; $i < $extra_languages; ++$i) {
        $languages[] = $this->randomName(2);
      }

      // For each given language provide some random values.
      $language_count = count($languages);
      for ($i = 0; $i < $language_count; ++$i) {
        $langcode = $languages[$i];
        // Avoid to populate at least one field translation to check that
        // per-entity language suggestions work even when available field values
        // are different for each language.
        if ($i !== $id) {
          for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
            $values[$id][$langcode][$delta]['value'] = mt_rand(1, 127);
          }
        }
        // Ensure that a language for which there is no field translation is
        // used as display language to prepare per-entity language suggestions.
        elseif (!isset($display_language)) {
          $display_language = $langcode;
        }
      }

      $entity->{$this->field_name} = $values[$id];
      $entities[$id] = $entity;

      // Store per-entity language suggestions.
      $options['language'][$id] = field_language($entity_type, $entity, NULL, $display_language);
    }

    $grouped_results = _field_invoke_multiple('test_op_multiple', $entity_type, $entities);
    foreach ($grouped_results as $id => $results) {
      foreach ($results as $langcode => $result) {
        if (isset($values[$id][$langcode])) {
          $hash = hash('sha256', serialize(array($entity_type, $entities[$id], $this->field_name, $langcode, $values[$id][$langcode])));
          // Check whether the parameters passed to _field_invoke_multiple()
          // were correctly forwarded to the callback function.
          $this->assertEqual($hash, $result, format_string('The result for entity %id/%language is correctly stored.', array('%id' => $id, '%language' => $langcode)));
        }
      }
      $this->assertEqual(count($results), count($available_languages), format_string('No unavailable language has been processed for entity %id.', array('%id' => $id)));
    }

    $null = NULL;
    $grouped_results = _field_invoke_multiple('test_op_multiple', $entity_type, $entities, $null, $null, $options);
    foreach ($grouped_results as $id => $results) {
      foreach ($results as $langcode => $result) {
        $this->assertTrue(isset($options['language'][$id]), format_string('The result language %language for entity %id was correctly suggested (display language: %display_language).', array('%id' => $id, '%language' => $langcode, '%display_language' => $display_language)));
      }
    }
  }

  /**
   * Test translatable fields storage/retrieval.
   */
  function testTranslatableFieldSaveLoad() {
    // Enable field translations for nodes.
    field_test_entity_info_translatable('node', TRUE);
    $entity_info = entity_get_info('node');
    $this->assertTrue(count($entity_info['translation']), 'Nodes are translatable.');

    // Prepare the field translations.
    field_test_entity_info_translatable('test_entity', TRUE);
    $eid = $evid = 1;
    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity($eid, $evid, $this->instance['bundle']);
    $field_translations = array();
    $available_languages = field_available_languages($entity_type, $this->field);
    $this->assertTrue(count($available_languages) > 1, 'Field is translatable.');
    foreach ($available_languages as $langcode) {
      $field_translations[$langcode] = $this->_generateTestFieldValues($this->field['cardinality']);
    }

    // Save and reload the field translations.
    $entity->{$this->field_name} = $field_translations;
    field_attach_insert($entity_type, $entity);
    unset($entity->{$this->field_name});
    field_attach_load($entity_type, array($eid => $entity));

    // Check if the correct values were saved/loaded.
    foreach ($field_translations as $langcode => $items) {
      $result = TRUE;
      foreach ($items as $delta => $item) {
        $result = $result && $item['value'] == $entity->{$this->field_name}[$langcode][$delta]['value'];
      }
      $this->assertTrue($result, format_string('%language translation correctly handled.', array('%language' => $langcode)));
    }
  }

  /**
   * Tests display language logic for translatable fields.
   */
  function testFieldDisplayLanguage() {
    $field_name = drupal_strtolower($this->randomName() . '_field_name');
    $entity_type = 'test_entity';

    // We need an additional field here to properly test display language
    // suggestions.
    $field = array(
      'field_name' => $field_name,
      'type' => 'test_field',
      'cardinality' => 2,
      'translatable' => TRUE,
    );
    field_create_field($field);

    $instance = array(
      'field_name' => $field['field_name'],
      'entity_type' => $entity_type,
      'bundle' => 'test_bundle',
    );
    field_create_instance($instance);

    $entity = field_test_create_stub_entity(1, 1, $this->instance['bundle']);
    $instances = field_info_instances($entity_type, $this->instance['bundle']);

    $enabled_languages = field_content_languages();
    $languages = array();

    // Generate field translations for languages different from the first
    // enabled.
    foreach ($instances as $instance) {
      $field_name = $instance['field_name'];
      $field = field_info_field($field_name);
      do {
        // Index 0 is reserved for the requested language, this way we ensure
        // that no field is actually populated with it.
        $langcode = $enabled_languages[mt_rand(1, count($enabled_languages) - 1)];
      } 
       while (isset($languages[$langcode]));
      $languages[$langcode] = TRUE;
      $entity->{$field_name}[$langcode] = $this->_generateTestFieldValues($field['cardinality']);
    }

    // Test multiple-fields display languages for untranslatable entities.
    field_test_entity_info_translatable($entity_type, FALSE);
    drupal_static_reset('field_language');
    $requested_language = $enabled_languages[0];
    $display_language = field_language($entity_type, $entity, NULL, $requested_language);
    foreach ($instances as $instance) {
      $field_name = $instance['field_name'];
      $this->assertTrue($display_language[$field_name] == LANGUAGE_NONE, format_string('The display language for field %field_name is %language.', array('%field_name' => $field_name, '%language' => LANGUAGE_NONE)));
    }

    // Test multiple-fields display languages for translatable entities.
    field_test_entity_info_translatable($entity_type, TRUE);
    drupal_static_reset('field_language');
    $display_language = field_language($entity_type, $entity, NULL, $requested_language);

    foreach ($instances as $instance) {
      $field_name = $instance['field_name'];
      $langcode = $display_language[$field_name];
      // As the requested language was not assinged to any field, if the
      // returned language is defined for the current field, core fallback rules
      // were successfully applied.
      $this->assertTrue(isset($entity->{$field_name}[$langcode]) && $langcode != $requested_language, format_string('The display language for the field %field_name is %language.', array('%field_name' => $field_name, '%language' => $langcode)));
    }

    // Test single-field display language.
    drupal_static_reset('field_language');
    $langcode = field_language($entity_type, $entity, $this->field_name, $requested_language);
    $this->assertTrue(isset($entity->{$this->field_name}[$langcode]) && $langcode != $requested_language, format_string('The display language for the (single) field %field_name is %language.', array('%field_name' => $field_name, '%language' => $langcode)));

    // Test field_language() basic behavior without language fallback.
    variable_set('field_test_language_fallback', FALSE);
    $entity->{$this->field_name}[$requested_language] = mt_rand(1, 127);
    drupal_static_reset('field_language');
    $display_language = field_language($entity_type, $entity, $this->field_name, $requested_language);
    $this->assertEqual($display_language, $requested_language, 'Display language behave correctly when language fallback is disabled');
  }

  /**
   * Tests field translations when creating a new revision.
   */
  function testFieldFormTranslationRevisions() {
    $web_user = $this->drupalCreateUser(array('access field_test content', 'administer field_test content'));
    $this->drupalLogin($web_user);

    // Prepare the field translations.
    field_test_entity_info_translatable($this->entity_type, TRUE);
    $eid = 1;
    $entity = field_test_create_stub_entity($eid, $eid, $this->instance['bundle']);
    $available_languages = array_flip(field_available_languages($this->entity_type, $this->field));
    unset($available_languages[LANGUAGE_NONE]);
    $field_name = $this->field['field_name'];

    // Store the field translations.
    $entity->is_new = TRUE;
    foreach ($available_languages as $langcode => $value) {
      $entity->{$field_name}[$langcode][0]['value'] = $value + 1;
    }
    field_test_entity_save($entity);

    // Create a new revision.
    $langcode = field_valid_language(NULL);
    $edit = array("{$field_name}[$langcode][0][value]" => $entity->{$field_name}[$langcode][0]['value'], 'revision' => TRUE);
    $this->drupalPost('test-entity/manage/' . $eid . '/edit', $edit, t('Save'));

    // Check translation revisions.
    $this->checkTranslationRevisions($eid, $eid, $available_languages);
    $this->checkTranslationRevisions($eid, $eid + 1, $available_languages);
  }

  /**
   * Check if the field translation attached to the entity revision identified
   * by the passed arguments were correctly stored.
   */
  private function checkTranslationRevisions($eid, $evid, $available_languages) {
    $field_name = $this->field['field_name'];
    $entity = field_test_entity_test_load($eid, $evid);
    foreach ($available_languages as $langcode => $value) {
      $passed = isset($entity->{$field_name}[$langcode]) && $entity->{$field_name}[$langcode][0]['value'] == $value + 1;
      $this->assertTrue($passed, format_string('The @language translation for revision @revision was correctly stored', array('@language' => $langcode, '@revision' => $entity->ftvid)));
    }
  }
}