<?php

class CerBasicTestCase extends DrupalWebTestCase {

  /**
   * A user account under which the tests will be conducted.
   *
   * @var StdClass
   */
  protected $author;

  /**
   * A node that references $this->author.
   *
   * @var StdClass
   */
  protected $node;

  public static function getInfo() {
    return array(
      'name' => 'Basic',
      'description' => "Tests CER's basic CRUD functionality.",
      'group' => 'CER',
    );
  }

  public function setUp() {
    // Turns out you have to enable your own module in the friggin' test, if
    // you want your own classes to be available. Lawsy me and other such
    // utterances...SimpleTest is teh suck.
    parent::setUp('entity', 'ctools', 'entityreference', 'field_object', 'cer');

    $field = array(
      'type' => 'entityreference',
      'cardinality' => 1,
      'field_name' => 'field_author',
      'settings' => array(
        'target_type' => 'user',
      ),
    );
    field_create_field($field);

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

    $field = array(
      'type' => 'entityreference',
      'cardinality' => FIELD_CARDINALITY_UNLIMITED,
      'field_name' => 'field_pages',
      'settings' => array(
        'target_type' => 'node',
      ),
      'handler_settings' => array(
        'target_bundles' => array('page'),
      ),
    );
    field_create_field($field);

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

    /** @var CerPreset $preset */
    $preset = entity_create('cer', array());
    $preset->wrapper->cer_left->set('node:page:field_author');
    $preset->wrapper->cer_right->set('user:user:field_pages');
    $preset->wrapper->cer_bidirectional->set(TRUE);
    $preset->wrapper->cer_enabled->set(TRUE);
    $preset->save();

    $this->author = $this->drupalCreateUser();

    $this->node = $this->drupalCreateNode(array(
      'field_author' => array(
        LANGUAGE_NONE => array(
          array('target_id' => $this->author->uid),
        ),
      ),
    ));
  }

  public function testCreate() {
    $author = $this->reload('user', $this->author);
    $this->assertEqual(1, $author->field_pages->count());
    $this->assertEqual($this->node->nid, $author->field_pages[0]->nid->value());
  }

  public function testUpdateDereference() {
    // Dereference the node from the user.
    $this->author->field_pages = array();
    user_save($this->author);

    // Reload $this->node from the database so we get the latest field values.
    $this->assertNull($this->reload('node', $this->node)->field_author->value());
  }

  public function testUpdateChangeTarget() {
    $target = $this->drupalCreateUser();

    $this->node->field_author[LANGUAGE_NONE][0]['target_id'] = $target->uid;
    node_save($this->node);

    // The original author should no longer reference the node.
    $this->assertEqual(0, $this->reload('user', $this->author)->field_pages->count());

    /** @var EntityDrupalWrapper $target */
    $target = $this->reload('user', $target);
    $this->assertEqual(1, $target->field_pages->count());
    $this->assertEqual($this->node->nid, $target->field_pages[0]->nid->value());
  }

  public function testDelete() {
    node_delete($this->node->nid);
    $this->assertEqual(0, $this->reload('user', $this->author)->field_pages->count());
  }

  /**
   * @return EntityDrupalWrapper
   */
  protected function reload($entity_type, $entity) {
    list ($id) = entity_extract_IDs($entity_type, $entity);
    $entities = entity_load($entity_type, array($id), NULL, TRUE);

    return entity_metadata_wrapper($entity_type, $entities[$id]);
  }

}