<?php

namespace Alchemy\Phrasea\WorkerManager\Worker;

use Alchemy\Phrasea\Application\Helper\ApplicationBoxAware;
use Alchemy\Phrasea\Application\Helper\DispatcherAware;
use Alchemy\Phrasea\Application\Helper\EntityManagerAware;
use Alchemy\Phrasea\Core\PhraseaTokens;
use Alchemy\Phrasea\Metadata\TagFactory;
use Alchemy\Phrasea\Model\Entities\WorkerRunningJob;
use Alchemy\Phrasea\Model\Repositories\WorkerRunningJobRepository;
use Alchemy\Phrasea\WorkerManager\Event\SubdefinitionWritemetaEvent;
use Alchemy\Phrasea\WorkerManager\Event\WorkerEvents;
use Alchemy\Phrasea\WorkerManager\Queue\MessagePublisher;
use DateTime;
use Exception;
use Monolog\Logger;
use PHPExiftool\Driver\Metadata\Metadata;
use PHPExiftool\Driver\Metadata\MetadataBag;
use PHPExiftool\Driver\Tag;
use PHPExiftool\Driver\Value\Mono;
use PHPExiftool\Driver\Value\Multi;
use PHPExiftool\Exception\TagUnknown;
use PHPExiftool\Writer;
use Psr\Log\LoggerInterface;
use record_adapter;

class WriteMetadatasWorker implements WorkerInterface
{
    use ApplicationBoxAware;
    use DispatcherAware;
    use EntityManagerAware;

    /** @var Logger  */
    private $logger;

    /** @var MessagePublisher $messagePublisher */
    private $messagePublisher;

    /** @var  Writer $writer */
    private $writer;

    private $repoWorker;

    public function __construct(
        Writer $writer,
        LoggerInterface $logger,
        MessagePublisher $messagePublisher,
        WorkerRunningJobRepository $repoWorker
    )
    {
        $this->writer           = $writer;
        $this->logger           = $logger;
        $this->messagePublisher = $messagePublisher;
        $this->repoWorker       = $repoWorker;
    }

    public function process(array $payload)
    {
        if (isset($payload['recordId']) && isset($payload['databoxId'])) {
            $recordId  = $payload['recordId'];
            $databoxId = $payload['databoxId'];

            $MWG      = isset($payload['MWG']) ? $payload['MWG'] : false;
            $clearDoc = isset($payload['clearDoc']) ? $payload['clearDoc'] : false;
            $databox = $this->findDataboxById($databoxId);

            // check if there is a make subdef running for the record or the same task running
            $canWriteMeta = $this->repoWorker->canWriteMetadata($payload['subdefName'], $recordId, $databoxId);

            $message = [
                'message_type'  => MessagePublisher::WRITE_METADATAS_TYPE,
                'payload'       => $payload
            ];

            if (!$canWriteMeta) {
                // the file is in used to generate subdef

                $this->messagePublisher->publishDelayedMessage($message, MessagePublisher::WRITE_METADATAS_TYPE);

                return ;
            }

            $record  = $databox->get_record($recordId);

            if ($record->getMimeType() == 'image/svg+xml') {

                $this->logger->error("Can't write meta on svg file!");

                return;
            }

            // tell that a file is in used to create subdef
            $em = $this->getEntityManager();
            $this->repoWorker->reconnect();

            if (isset($payload['workerJobId'])) {
                /** @var WorkerRunningJob $workerRunningJob */
                $workerRunningJob = $this->repoWorker->find($payload['workerJobId']);

                if ($workerRunningJob == null) {
                    $this->logger->error("Given workerJobId not found !");

                    return ;
                }

                $workerRunningJob
                    ->setInfo(WorkerRunningJob::ATTEMPT . $payload['count'])
                    ->setStatus(WorkerRunningJob::RUNNING)
                ;

                $em->persist($workerRunningJob);

                $em->flush();
            } else {
                $em->beginTransaction();

                try {
                    $date = new DateTime();
                    $workerRunningJob = new WorkerRunningJob();
                    $workerRunningJob
                        ->setDataboxId($databoxId)
                        ->setRecordId($recordId)
                        ->setWork(MessagePublisher::WRITE_METADATAS_TYPE)
                        ->setWorkOn($payload['subdefName'])
                        ->setPayload($message)
                        ->setPublished($date->setTimestamp($payload['published']))
                        ->setStatus(WorkerRunningJob::RUNNING)
                    ;

                    $em->persist($workerRunningJob);
                    $em->flush();

                    $em->commit();
                } catch (Exception $e) {
                    $em->rollback();
                    $this->logger->error("Error persisting WorkerRunningJob !");

                    return ;
                }
            }

            try {
                $subdef = $record->get_subdef($payload['subdefName']);
            } catch (Exception $e) {
                $workerMessage = "Exception catched when try to get subdef " .$payload['subdefName']. " from DB for the recordID: " .$recordId;
                $this->logger->error($workerMessage);

                $count = isset($payload['count']) ? $payload['count'] + 1 : 2 ;

                $this->dispatch(WorkerEvents::SUBDEFINITION_WRITE_META, new SubdefinitionWritemetaEvent(
                    $record,
                    $payload['subdefName'],
                    SubdefinitionWritemetaEvent::FAILED,
                    $workerMessage,
                    $count,
                    $workerRunningJob->getId()
                ));

                return ;
            }

            if ($subdef->is_physically_present()) {
                $metadata = new MetadataBag();

                // add Uuid in metadatabag
                if ($record->getUuid()) {
                    $metadata->add(
                        new Metadata(
                            new Tag\XMPExif\ImageUniqueID(),
                            new Mono($record->getUuid())
                        )
                    );
                    $metadata->add(
                        new Metadata(
                            new Tag\ExifIFD\ImageUniqueID(),
                            new Mono($record->getUuid())
                        )
                    );
                    $metadata->add(
                        new Metadata(
                            new Tag\IPTC\UniqueDocumentID(),
                            new Mono($record->getUuid())
                        )
                    );
                }

                // read document fields and add to metadatabag
                $caption = $record->get_caption();
                foreach ($databox->get_meta_structure() as $fieldStructure) {

                    $tagName = $fieldStructure->get_tag()->getTagname();
                    $fieldName = $fieldStructure->get_name();

                    // skip fields with no src
                    if ($tagName == '' || $tagName == 'Phraseanet:no-source') {
                        continue;
                    }

                    // check exiftool known tags to skip Phraseanet:tf-*
                    try {
                        $tag = TagFactory::getFromRDFTagname($tagName);
                        if(!$tag->isWritable()) {
                            continue;
                        }
                    } catch (TagUnknown $e) {
                        continue;
                    }

                    try {
                        $field = $caption->get_field($fieldName);
                        $fieldValues = $field->get_values();

                        if ($fieldStructure->is_multi()) {
                            $values = array();
                            foreach ($fieldValues as $value) {
                                $values[] = $this->removeNulChar($value->getValue());
                            }

                            $value = new Multi($values);
                        } else {
                            $fieldValue = array_pop($fieldValues);
                            $value = $this->removeNulChar($fieldValue->getValue());

                            // fix the dates edited into phraseanet
                            if($fieldStructure->get_type() === $fieldStructure::TYPE_DATE) {
                                try {
                                    $value = self::fixDate($value); // will return NULL if the date is not valid
                                }
                                catch (Exception $e) {
                                    $value = null;    // do NOT write back to iptc
                                }
                            }

                            if($value !== null) {   // do not write invalid dates
                                $value = new Mono($value);
                            }
                        }
                    } catch(Exception $e) {
                        // the field is not set in the record, erase it
                        if ($fieldStructure->is_multi()) {
                            $value = new Multi(array(''));
                        }
                        else {
                            $value = new Mono('');
                        }
                    }

                    if($value !== null) {   // do not write invalid data
                        $metadata->add(
                            new Metadata($fieldStructure->get_tag(), $value)
                        );
                    }
                }

                $this->writer->reset();

                if ($MWG) {
                    $this->writer->setModule(Writer::MODULE_MWG, true);
                }

                $this->writer->erase($subdef->get_name() != 'document' || $clearDoc, true);

                // write meta in file
                try {
                    $this->writer->write($subdef->getRealPath(), $metadata);

                    $this->messagePublisher->pushLog(sprintf('meta written for sbasid=%1$d - recordid=%2$d (%3$s)', $databox->get_sbas_id(), $recordId, $subdef->get_name() ));
                } catch (Exception $e) {
                    $workerMessage = sprintf('meta NOT written for sbasid=%1$d - recordid=%2$d (%3$s) because "%4$s"', $databox->get_sbas_id(), $recordId, $subdef->get_name() , $e->getMessage());
                    $this->logger->error($workerMessage);

                    $count = isset($payload['count']) ? $payload['count'] + 1 : 2 ;

                    $this->dispatch(WorkerEvents::SUBDEFINITION_WRITE_META, new SubdefinitionWritemetaEvent(
                        $record,
                        $payload['subdefName'],
                        SubdefinitionWritemetaEvent::FAILED,
                        $workerMessage,
                        $count,
                        $workerRunningJob->getId()
                    ));
                }

                // mark write metas finished
                $this->updateJeton($record);
            } else {
                $count = isset($payload['count']) ? $payload['count'] + 1 : 2 ;

                $this->dispatch(WorkerEvents::SUBDEFINITION_WRITE_META, new SubdefinitionWritemetaEvent(
                    $record,
                    $payload['subdefName'],
                    SubdefinitionWritemetaEvent::FAILED,
                    'Subdef is not physically present!',
                    $count,
                    $workerRunningJob->getId()
                ));
            }


            // tell that we have finished to work on this file
            $this->repoWorker->reconnect();
            $em->beginTransaction();
            try {
                $workerRunningJob->setStatus(WorkerRunningJob::FINISHED);
                $workerRunningJob->setFinished(new DateTime('now'));
                $em->persist($workerRunningJob);
                $em->flush();
                $em->commit();
            } catch (Exception $e) {
                $em->rollback();
            }

        }

    }

    private function removeNulChar($value)
    {
        return str_replace("\0", "", $value);
    }

    private function updateJeton(record_adapter $record)
    {
        $connection = $record->getDatabox()->get_connection();

        $connection->beginTransaction();
        $stmt = $connection->prepare('UPDATE record SET jeton=(jeton & ~(:token)), moddate=NOW() WHERE record_id = :record_id');

        $stmt->execute([
            ':record_id'    => $record->getRecordId(),
            ':token'        => PhraseaTokens::WRITE_META,
        ]);

        $connection->commit();
        $stmt->closeCursor();
    }

    /**
     * re-format a phraseanet date for iptc writing
     * return NULL if the date is not valid
     *
     * @param string $value
     * @return string|null
     */
    private static function fixDate($value)
    {
        $date = null;
        try {
            $a = explode(';', preg_replace('/\D+/', ';', trim($value)));
            switch (count($a)) {
                case 3:     // yyyy;mm;dd
                    $date = new DateTime($a[0] . '-' . $a[1] . '-' . $a[2]);
                    $date = $date->format('Y-m-d H:i:s');
                    break;
                case 6:     // yyyy;mm;dd;hh;mm;ss
                    $date = new DateTime($a[0] . '-' . $a[1] . '-' . $a[2] . ' ' . $a[3] . ':' . $a[4] . ':' . $a[5]);
                    $date = $date->format('Y-m-d H:i:s');
                    break;
            }
        }
        catch (Exception $e) {
            $date = null;
        }

        return $date;
    }
}