<?php

namespace CorpusParole\Models;

use Config;

use CorpusParole\Libraries\Utils;

use CorpusParole\Libraries\RdfModel\RdfModelResource;

use JsonSerializable;

use Log;

use EasyRdf\Literal;

use EasyRdf\Resource;

use EasyRdf\Graph;

use EasyRdf\Isomorphic;

/**

 * Model class for Document. Inherit from EasyRd\Resource

 * SELECT DISTINCT ?g WHERE {GRAPH ?g {?s ?p ?o}}

 */

class Document extends RdfModelResource implements JsonSerializable {

    public function __construct($uri, $graph = null) {

        parent::__construct($uri, $graph);

    }

    private $id = null;

    public function getId() {

        if(is_null($this->id)) {

            $this->id = substr($this->uri, strlen(Config::get('corpusparole.cocoon_doc_id_base_uri')));

        }

        return $this->id;

    }

    public function getTitle() {

        try {

            return $this->getLiteral('<http://purl.org/dc/elements/1.1/title>');

        } catch(\Exception $e) {

            return null;

        }

    }

    public function getPublishers() {

        try {

            return $this->allLiterals('dc11:publisher');

        } catch(\Exception $e) {

           return [];

       }

    }

    public function getMediaArray() {

        //TODO: add media type

        $res = [];

        $formats = [];

        try {

            $formats = $this->allResources("dc:isFormatOf");

        } catch(\Exception $e) {

            // do nothing

        }

        foreach ($formats as $f) {

            $uri = $f->getUri();

            $mimetype = Utils::get_mimetype($uri);

            array_push($res, ["url" => $uri, "format" => $mimetype]);

        }

        $format = null;

        try {

            $format = $this->getLiteral('dc11:format');

        } catch(\Exception $e) {

            // do nothing

        }

        array_push($res, ["url" => $this->getUri(), "format" => $format]);

        return $res;

    }

    public function getTypes() {

        return $this->all('dc11:type');

    }

    public function getDiscourseTypes() {

        return array_values(array_filter($this->getTypes(), function($v) {

            return $v instanceof Literal && $v->getDatatypeUri() === Config::get('constants.OLAC_DISCOURSE_TYPE')['uri'];

        }));

    }

    public function getOtherTypes() {

        $res = array_values(array_filter($this->getTypes(), function($v) {

            return $v instanceof Resource || $v->getDatatypeUri() !== Config::get('constants.OLAC_DISCOURSE_TYPE')['uri'];

        }));

        return $res;

    }

    public function updateDiscourseTypes(array $discoursesTypes) {

        $this->startDelta();

        foreach($this->getDiscourseTypes() as $discourseType) {

            $this->delete('dc11:type', $discourseType);

            $this->currentDelta->getDeletedGraph()->add($this, 'dc11:type', new Literal($discourseType, null, Config::get('constants.OLAC_DISCOURSE_TYPE')['uri']));

        }

        // re-add them

        foreach($discoursesTypes as $dType) {

            $this->add('dc11:type', new Literal($dType, null, Config::get('constants.OLAC_DISCOURSE_TYPE')['uri']));

            $this->currentDelta->getAddedGraph()->add($this, 'dc11:type', new Literal($dType, null, Config::get('constants.OLAC_DISCOURSE_TYPE')['uri']));

        }

    }

    public function isIsomorphic($doc) {

        return Isomorphic::isomorphic($this->graph, $doc->graph);

    }

    /*

     * Clone document.

     * clone also the innerDocumenent

     */

    public function __clone() {

        $this->graph = new Graph($this->graph->getUri(), $this->graph->toRdfPhp());

    }

    public function jsonSerialize() {

        if(!$this->graph) {

            return [

                'id' => $this->getId(),

            ];

        } else {

            $mediaArray = array_map(

                function($m) {

                    $f = Utils::process_literal_or_string($m['format']);

                    return ['url' => $m['url'], 'format' => $f];},

                $this->getMediaArray()

            );

            $publishers = array_map(

                function($v) { return Utils::process_literal_or_string($v); },

                $this->getPublishers()

            );

            return [

                'id' => $this->getId(),

                'uri' => $this->getUri(),

                'title' => $this->getTitle()->getValue(),

                'publishers' => $publishers,

                'mediaArray'=> $mediaArray

            ];

        }

    }

}