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<?php
/**
 * Le web service plantnet récupère toutes les infos de la vue del_plantnet.
 * Ordonées par date de modification.
 * Les images sont regroupées en observations.
 * Les tags, les votes et les propositions de determinations sont intégrés à l'observation.
 *
 * Paramètres: date.debut et date.fin (unixtime en secondes), navigation.limite (10 par défaut), navigation.depart, ordre (DESC par défaut)
 * Ne pas Oublier l'api key dans le header $_SERVER['HTTP_API_KEY']
 *
 * @category DEL
 * @package Services
 * @subpackage Plantnet
 * @version 0.1
 * @author Mathias CHOUET <mathias@tela-botanica.org>
 * @author Samuel DUFOUR-KOWALSKI <samuel.dufour@cirad.fr>
 * @author Jean-Pascal MILCENT <jpm@tela-botanica.org>
 * @author Aurelien PERONNET <aurelien@tela-botanica.org>
 * @license GPL v3 <http://www.gnu.org/licenses/gpl.txt> 
 * @license CECILL v2 <http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt>
 * @copyright 1999-2014 Tela Botanica <accueil@tela-botanica.org>
 */

class Changements {

        private $conteneur;
        private $navigation;
        private $bdd;

        private $parametres = array();
        private $ressources = array();
        private $ordre_defaut = 'asc';
        private $idsObsImg = array();
        private $infosObsImg = array();


        public function __construct(Conteneur $conteneur = null) {
                /* restore_exception_handler(); */
                /* restore_error_handler(); */
                /* ini_set("display_errors", "1"); */

                $this->conteneur = $conteneur == null ? new Conteneur() : $conteneur;
                $this->navigation = $conteneur->getNavigation();
                $this->bdd = $this->conteneur->getBdd();
        }

        /**
         * Méthode principale de la classe.
         * Lance la récupération des images dans la base et les place dans un objet ResultatService
         * pour l'afficher.
         * @param array $ressources les ressources situées après l'url de base (ex : http://url/ressource1/ressource2)
         * @param array $parametres les paramètres situés après le ? dans l'url
         * */
        public function consulter($ressources, $parametres) {
                // initialiserRessourcesEtParametres()
                $this->ressources = $ressources;
                $this->parametres = $parametres;

                if (!isset($parametres['date.debut'])) {
                        $this->parametres['date.debut'] = '0';
                }

                if (!isset($parametres['date.fin'])) {
                        $this->parametres['date.fin'] = time();
                }

                if (! isset($parametres['ordre'])) {
                        $this->parametres['ordre'] = $this->ordre_defaut;
                } else {
                        $parametres['ordre'] = strtolower($parametres['ordre']);
                        if (! in_array($parametres['ordre'], array('asc', 'desc'))) {
                                $this->parametres['ordre'] = $this->ordre_defaut;
                        }
                }

                // Lancement du service
                $this->idsObsImg = $this->getIdsObsImg();
                $infos = array();
                $total = 0;
                if ($this->idsObsImg) {
                        $total = $this->getTotal();

                        $this->infosObsImg = $this->recupererInfos();
                        $infos = $this->formaterInfos();
                        $infos = $this->chargerPropositionPlusProbable($infos);
                        $infos = $this->orderArray($infos);
                }
                $this->navigation->setTotal($total);

                // Mettre en forme le résultat et l'envoyer pour affichage
                $resultat = new ResultatService();
                $resultat->corps = array('entete' => $this->navigation->getEntete(), 'resultats' => $infos);
                return $resultat;
        }

        /*-------------------------------------------------------------------------------
                                                                CHARGEMENT DES IMAGES
        --------------------------------------------------------------------------------*/

        private function getIdsObsImg() {
        $date_debut = date('Y-m-d H:i:s', $this->parametres['date.debut']);
        $date_fin = date('Y-m-d H:i:s', $this->parametres['date.fin']);
        $limite = isset($this->parametres['navigation.limite']) ? intval($this->parametres['navigation.limite']) : 10;
                $depart = intval(@$this->parametres['navigation.depart']);
                $ordre = $this->parametres['ordre'];
        $date_debut = "'{$date_debut}'";
        $date_fin = "'{$date_fin}'";

                $requete =
                        'SELECT SQL_CALC_FOUND_ROWS p.id_observation, GROUP_CONCAT(DISTINCT p.id_image) as id_image, '.
                        'iv.moyenne AS moyenne_votes, '.
                        'iv.nb_votes AS nb_votes, '.
                        'iv.nb_points AS nb_points_votes, '.
                        'GROUP_CONCAT(DISTINCT it.tag) AS del_image_tags, '.
                        'modif_date '.
                        'FROM del_plantnet AS p '.
                        '       JOIN del_observation_modif_date '.
                        '               ON (p.id_observation = del_observation_modif_date.id_observation '.
                        '               AND modif_date >= '.$date_debut.' '.
                        '               AND modif_date <= '.$date_fin.') '.
                        '       LEFT JOIN del_image_stat AS iv '.
                        '               ON (id_image = iv.ce_image AND iv.ce_protocole = 3) '.
                        '       LEFT JOIN del_image_tag AS it '.
                        '               ON (id_image = it.ce_image AND it.actif = 1) '.
                        '       LEFT JOIN del_commentaire AS c '.
                        '               ON (p.id_observation = c.ce_observation) '.
                        '       LEFT JOIN del_commentaire_vote AS cv '.
                        '               ON (c.id_commentaire = cv.ce_proposition) '.
                        'GROUP BY p.id_observation '.
                        'ORDER BY modif_date ' . $ordre . ' '.
                        'LIMIT '.$depart.', '.$limite.
                        ' -- '.__FILE__.':'.__LINE__;
                return $this->bdd->recupererTous($requete);
        // On récupère id_obs, id_image, votes, tags, modif_date
        }

        private function getTotal() {
                $compte = $this->bdd->recuperer('SELECT FOUND_ROWS() AS nbre');
                $total = (int) $compte['nbre'];
                return $total;
        }

        // recupere les donnée associées (fait en 2 requetes pour optimiser)
        private function recupererInfos() {
                // recuperer les ids
                $idsImg = array();
                foreach ($this->idsObsImg as $ids) {
                        $id = $ids['id_image'];
                        $idsImg[] = $id;
                }
                $idsImgConcat = implode(',', $idsImg);

                $requete = 'SELECT '.
                        'p.id_observation, p.id_plantnet, p.id_image, '.
                        'cp.plant_net_occurrence_id, ' .
                        'p.nom_sel, p.nom_sel_nn, p.nom_ret, p.nom_ret_nn,'.
                        'p.nom_referentiel, p.famille, '.
                        'p.zone_geo, p.latitude, p.longitude,'.
                        'p.date_observation, p.date_created, p.date_published, '.
                        'p.type_donnees, p.identiplante_score, p.is_identiplante_validated, p.mots_cles_cel_obs, p.programme, '.
                        'p.ce_utilisateur, p.courriel_utilisateur, '.
                        'p.original_name AS nom_image, p.i_date_shot AS date_shot, p.i_date_updated AS image_updated, p.mots_cles_cel_image AS  mots_cles_cel_image '.
                        'FROM del_plantnet AS p '.
                        'LEFT JOIN tb_new_cel.pn_tb_pair AS cp ON p.id_observation = cp.occurrence_id '.
                        "WHERE id_image IN ($idsImgConcat) ".
                        ' -- '.__FILE__.':'.__LINE__;
                // recuperer les donnees
                $resultats = $this->bdd->recupererTous($requete);

                // regroupe les données par id_image
                $img_data = array();
                foreach ($resultats as $infos) {
                        $idImg = $infos['id_image'];
                        $img_data[$idImg] = $infos;
                }
                return $img_data;
        }

        /**
        * Retourner un tableau d'images formaté en fonction des liaisons trouvées
        * @param $liaisons les liaisons de la table del_obs_images
        */
        private function formaterInfos() {
                // regroupe les observations
                $obs = array();
                $imgCelTpl = $this->conteneur->getParametre('cel_img_url_tpl');
                foreach ($this->idsObsImg as $ids) {
                        $idobs = $ids['id_observation'];
                        $idimg = explode(',', $ids['id_image']);

            $obs[$idobs]['id_observation'] = $idobs;

            foreach ($idimg as $image){
                $imgInfos = null;
                $imgdata = null;

                $imgdata = $this->infosObsImg[$image];
                $imgInfos = $this->recupererInfosParImage($image);

                if (!isset($obs[$idobs])) {
                    $obs[$idobs] = array();
                }

                $obs[$idobs]['id_plantnet'] = $imgdata['id_plantnet'];
                $obs[$idobs]['auteur_courriel'] = $imgdata['courriel_utilisateur'];

                $obs[$idobs]['mots_cles_cel_obs'] = $imgdata['mots_cles_cel_obs'];
                $obs[$idobs]['programme'] = $imgdata['programme'];

                $obs[$idobs]['date_observation'] = $imgdata['date_observation'];
                $obs[$idobs]['date_creation'] = $imgdata['date_created'];
                $obs[$idobs]['date_changement'] = $ids['modif_date'];
                $obs[$idobs]['date_publication'] = $imgdata['date_published'];
                $obs[$idobs]['type_donnees'] = $imgdata['type_donnees'];
                $obs[$idobs]['identiplante_score'] = $imgdata['identiplante_score'];
                $obs[$idobs]['is_identiplante_validated'] = $imgdata['is_identiplante_validated'];

                $obs[$idobs]['nom_sel'] = $imgdata['nom_sel'];
                $obs[$idobs]['nom_sel_nn'] = $imgdata['nom_sel_nn'];
                $obs[$idobs]['nom_referentiel'] = $imgdata['nom_referentiel'];
                $obs[$idobs]['nom_ret'] = $imgdata['nom_ret'];
                $obs[$idobs]['nom_ret_nn'] = $imgdata['nom_ret_nn'];
                $obs[$idobs]['famille'] = $imgdata['famille'];

                $obs[$idobs]['zone_geo'] = $imgdata['zone_geo'];
                $obs[$idobs]['latitude'] = $imgdata['latitude'];
                $obs[$idobs]['longitude'] = $imgdata['longitude'];

                if (!isset($obs[$idobs]['images'])) {
                    $obs[$idobs]['images'] = array();
                }

                $img_obj = array(
                    'id_image' => $image,
                    'nom_image' => $imgdata['nom_image'],
                    'image_updated' => $imgdata['image_updated'],
                    'date_shot' => $imgdata['date_shot'],
                    'mots_cles_cel_image' => $imgInfos[0]['mots_cles_cel_image'],
                    'url' => sprintf($imgCelTpl, $idimg, 'O'),
                    'votes' => [
                        'moyenne_votes' => $imgInfos[0]['moyenne_votes'],
                        'nb_votes' => $imgInfos[0]['nb_votes'],
                        'nb_points_votes' => $imgInfos[0]['nb_points_votes'],
                    ],
                    'del_tags' => explode(',', $imgInfos[0]['del_image_tags']),
                );
                // push
                $obs[$idobs]['images'][] = $img_obj;
            }

                }
                return $obs;
        }

        /**
         * Charger les votes pour chaque image
         */
        private function chargerPropositionPlusProbable(&$obs) {
                $obsIds = array_keys($obs);
                $idsObsConcat = implode(',', $obsIds);

                $requete = 'SELECT ce_observation, id_commentaire, valeur, nom_sel, nom_sel_nn, nom_ret, cv.ce_utilisateur '.
                        'FROM del_commentaire_vote AS cv, del_commentaire AS c '.
                        "WHERE ce_observation IN ($idsObsConcat) ".
                        'AND nom_sel IS NOT NULL '.
                        'AND c.id_commentaire = cv.ce_proposition '.
                        ' -- '.__FILE__.':'.__LINE__;
                $resultats = $this->bdd->recupererTous($requete);

                // calcul des votes
                // un vote identifié a un facteur de 3
                // additionne tous les vote par ce_proposition
                $votes = array(); // map ce_proposition -> score
                foreach ($resultats as $vote) {
                        if (!isset($votes[$vote['id_commentaire']])) {
                                $votes[$vote['id_commentaire']] = 0;
                        }
                        $valeur = ($vote['valeur'] == 1) ? 1 : -1;
                        $votes[$vote['id_commentaire']] += is_numeric($vote['ce_utilisateur']) ? 3 * $valeur : $valeur;
                }

                foreach ($resultats as $vote) {
                        $idobs = $vote['ce_observation'];

                        if (!isset($obs[$idobs]['determinations'])) {
                                $obs[$idobs]['determinations'] = array();
                        }

                        $obs[$idobs]['determinations'][$vote['id_commentaire']] =
                        array('nom_sel' => $vote['nom_sel'],
                                'nom_ret' => $vote['nom_ret'],
                                'score' => $votes[$vote['id_commentaire']],
                                'nn' => $vote['nom_sel_nn']);
                }
                return $obs;
        }

        private function orderArray(&$obs) {
                $ret = array();
                foreach ($obs as $o) {
                        $ret[] = $o;
                }

                function cmpDesc($a, $b) {
                        return ($a['date_changement'] < $b['date_changement']) ? 1 : -1;
                }
                function cmpAsc($a, $b) {
                        return cmpDesc($b, $a);
                }

                if ($this->parametres['ordre'] == 'desc') {
                        usort($ret, 'cmpDesc');
                } else {
                        usort($ret, 'cmpAsc');
                }
                return $ret;
        }

        /**
         * Formater les mots clés du cel en n'affichant que ceux faisant partie
         * d'une liste définie dans le fichier de configuration
         * @param $chaineMotCleCel la chaine de mots clés du cel
         * @return string la chaine filtrée
         */
        private function formaterMotsClesCel($chaineMotCleCel) {
                $mots_cles_cel_affiches = "fleur,fleurs,feuille,feuilles,ecorce,fruit,fruits,port,plantnet,plantscan_new,plantnet-mobile";

                $result = array_intersect(
                        explode(',', $mots_cles_cel_affiches), // $tabMotsClesAffiches
                        explode(',', $chaineMotCleCel)); // $tabMotsClesCel

                if (count($result) === 0) {
                  return array();
                }
                $ret = explode(',', implode(',', $result));
                return $ret;
        }

    /**
     * On charge les infos spécifique à chaque image d'une obs
     */
    private function recupererInfosParImage($id_image){
        $requete =
            'SELECT SQL_CALC_FOUND_ROWS p.id_image, '.
            'p.mots_cles_cel_image, '.
            'iv.moyenne AS moyenne_votes, '.
            'iv.nb_votes AS nb_votes, '.
            'iv.nb_points AS nb_points_votes, '.
            'GROUP_CONCAT(DISTINCT it.tag) AS del_image_tags '.
            'FROM del_plantnet_images AS p '.
            '   LEFT JOIN del_image_stat AS iv '.
            '           ON (id_image = iv.ce_image AND iv.ce_protocole = 3) '.
            '   LEFT JOIN del_image_tag AS it '.
            '           ON (id_image = it.ce_image AND it.actif = 1) '.
            '           WHERE id_image = '. $id_image .' '.
            'GROUP BY p.id_image '.
            ' -- '.__FILE__.':'.__LINE__;
        return $this->bdd->recupererTous($requete);
    }
}