<?php

namespace IRI\Bundle\WikiTagBundle\Entity;

use Doctrine\ORM\EntityRepository;

use IRI\Bundle\WikiTagBundle\Utils\WikiTagUtils;

use IRI\Bundle\WikiTagBundle\Entity\Tag;

/**

 * TagRepository

 *

 * This class was generated by the Doctrine ORM. Add your own custom

 * repository methods below.

 */

class TagRepository extends EntityRepository

{

    public function getTagCloud($max_tags)

    {

        $qb = $this->getEntityManager()->createQueryBuilder();

        $qb->select('t.id', 't.label', 'COUNT( dt.id ) AS nb_docs');

        $qb->from('WikiTagBundle:Tag','t');

        $qb->leftJoin('t.documents', 'dt', 'WITH', 't = dt.tag');

        $qb->addGroupBy('t.id');

        $qb->addOrderBy('nb_docs','DESC');

        $qb->setMaxResults($max_tags);

        $query = $qb->getQuery();

        return $query->getResult();

    }

    /**

     * returns a list of tags label containing the given seed.

     * The seed is either at the beggining, the end of the label or at the beggining of a word.

     * @param string $seed

     */

    public function getCompletion($seed)

    {

        $qb = $this->getEntityManager()->createQueryBuilder();

        $qb->select('DISTINCT t.label');

        $qb->from('WikiTagBundle:Tag','t');

        $qb->where($qb->expr()->orx(

            $qb->expr()->like('t.label',$qb->expr()->literal(addcslashes(mysql_real_escape_string($seed),"%_")."%")),

            $qb->expr()->like('t.label',$qb->expr()->literal("%".addcslashes(mysql_real_escape_string($seed),"%_"))),

            $qb->expr()->like('t.label',$qb->expr()->literal("% ".addcslashes(mysql_real_escape_string($seed),"%_")."%"))

        ));

        $query = $qb->getQuery();

        return $query->getResult();

    }

    private function findSemantizedTag($entityList, $normalized_label)

    {

        $tag = null;

        foreach ($entityList as $entity) {

            if(!is_null($normalized_label) && (!is_a($entity, "\IRI\Bundle\WikiTagBundle\Model\TagInterface") || $normalized_label !== $entity->getNormalizedLabel())) {

                continue;

            }

            $t = $entity;

            if($tag==null

            || $tag->getUrlStatus() === Tag::$TAG_URL_STATUS_DICT['unsemantized']

            || ($tag->getUrlStatus() === Tag::$TAG_URL_STATUS_DICT['null_result'] && $t->getUrlStatus() !== Tag::$TAG_URL_STATUS_DICT['unsemantized'])) {

                $tag = $t;

                if($tag->getUrlStatus()!=Tag::$TAG_URL_STATUS_DICT['unsemantized'] && $tag->getUrlStatus()!=Tag::$TAG_URL_STATUS_DICT['null_result']) {

                    break;

                }

            }

        }

        return $tag;

    }

    /**

    * Get or create tag. Returns an array(tag:WikiTagTag, revision_id=int, created:Boolean)

    * @param $tag_label

    * @param $doctrine

    * @return multitype:boolean Ambigous <NULL, \IRI\Bundle\WikiTagBundle\Entity\Tag> Ambigous <NULL, unknown, mixed, string> (array(\IRI\Bundle\WikiTagBundle\Model\TagInterface, revision_id=int, created:Boolean))

    */

    public function getOrCreateTag($tag_label, $ignore_wikipedia_info=false, $logger=null)

    {

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

        // We get the wikipedia references for the tag_label

        // We get or create the tag object

        $tags = $this->findBy(array('normalizedLabel' => $tag_label_normalized));

        $tag = $this->findSemantizedTag($tags, null);

        $uow = $this->getEntityManager()->getUnitOfWork();

        if(is_null($tag)) {

            $tag = $this->findSemantizedTag($uow->getScheduledEntityInsertions(), $tag_label_normalized);

        }

        if(is_null($tag)) {

            $tag = $this->findSemantizedTag($uow->getScheduledEntityUpdates(), $tag_label_normalized);

        }

        $wp_request_done = false;

        if($tag==null) {

            $tag = new Tag();

            $tag->setLabel($tag_label_normalized);

            $tag->setOriginalLabel($tag_label);

            $tag->setNormalizedLabel($tag_label_normalized);

            $created = true;

        }

        else {

            $created = false;

        }

        // We request Wikipedia if the tag is created or if this is a null result

        if($created==true || $tag->getUrlStatus()===Tag::$TAG_URL_STATUS_DICT['null_result']) {

            if($wp_request_done==false) {

                $wp_response = WikiTagUtils::getWikipediaInfo($tag_label_normalized, null, $ignore_wikipedia_info, $logger);

            }

            $tag->setWikipediaInfo($wp_response);

            // Save datas.

            $em = $this->getEntityManager();

            $em->persist($tag);

            $wikipedia_revision_id = $wp_response['revision_id'];

        }

        elseif($tag!=null && $tag->getWikipediaPageId()!=null) {

            $wp_response = WikiTagUtils::getWikipediaInfo(null, $tag->getWikipediaPageId(), $ignore_wikipedia_info, $logger);

            $wikipedia_revision_id = $wp_response['revision_id'];

        }

        else {

            $wikipedia_revision_id = null;

        }

        return array($tag, $wikipedia_revision_id, $created);//, $wpReponse);

    }

}