use IRI\Bundle\WikiTagBundle\Entity\DocumentTag;

use IRI\Bundle\WikiTagBundle\Utils\WikiTagUtils;

     * The ids are the ids of the "host" document.

    /**

     *

     * Add a new tag to a "host" document.

     * If the label already exists, an exception is raised.

     *

     * @param mixed $id_doc

     * @param string|array $tag_label : the label of the new tag

     */

    public function addTags($id_doc, $tag_labels)

    {

        // We get the DocumentTags

        $em = $this->getDoctrine()->getEntityManager();

        $need_flush = false;

        if(!is_array($tag_labels)) {

            $tag_labels = array($tag_labels);

        }

        foreach ($tag_labels as $tag_label) {

            $normalized_tag_label = WikiTagUtils::normalizeTag($tag_label);

            $query = $em->createQuery("SELECT COUNT(dt.id) FROM WikiTagBundle:DocumentTag dt JOIN dt.tag t WHERE dt.document = :id_doc AND t.normalizedLabel = :label");

            $query->setParameters(array("id_doc"=>$id_doc, "label"=>$normalized_tag_label));

            $nb_tags = $query->getSingleScalarResult();

            // If the label was found, we sent a bad request

            if($nb_tags > 0){

                throw new WikiTagServiceException(sprintf("Le tag %s existe déjà pour cette fiche.", $tag_label), 400, null, "duplicate_tag");

            }

            // returns array($tag, $revision_id, $created)

            try {

                $ar = $this->getDoctrine()->getRepository('WikiTagBundle:Tag')->getOrCreateTag($tag_label);

            }

            catch (\Exception $e){

                throw new WikiTagServiceException($e->getMessage(), 500 , $e, "wikipedia_request_failed");

            }

            $tag = $ar[0];

            $revision_id = $ar[1];

            $created = $ar[2];

            $tags = $this->getDoctrine()->getRepository('WikiTagBundle:DocumentTag')->findByDocumentExternalId($id_doc, array('tag'=>$tag->getId()));

            $nb_tags = count($tags);

            if($created==true || $nb_tags==0){

                $new_order_ar = $this->getDoctrine()->getRepository('WikiTagBundle:DocumentTag')->getMaxOrder($id_doc);

                // The result is a double array. And reset(reset($newOrderAr)) is not allowed. And a string is returned.

                $a1 = reset($new_order_ar);

                $new_order = intval(reset($a1)) + 1;

                $new_DT = new DocumentTag();

                $new_DT->setDocument($this->getDoctrine()->getRepository('WikiTagBundle:Document')->findOneByExternalId($id_doc));

                $new_DT->setTag($tag);

                $new_DT->setOriginalOrder($new_order);

                $new_DT->setTagOrder($new_order);

                $new_DT->setWikipediaRevisionId($revision_id);

                $em->persist($new_DT);

                $need_flush = true;

            }

        }

        if($need_flush) {

            $em->flush();

        }

    }

    public function getTagLabels($id_doc)

    {

        $rep = $this->getDoctrine()->getRepository('WikiTagBundle:Document');

        $doc = $rep->findOneByExternalId($id_doc);

        if(is_null($doc)) {

            throw new WikiTagServiceException("Unknown document id");

        }

        return $rep->getTagsStr($doc);

    }