<?php

namespace App\Service;

use Aws\S3\Exception\S3Exception;
use Exception;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\Filesystem\Filesystem;


class MinioService
{
    const ERR_UNAVAILABLE = 'Service de gestion de fichiers momentanément indisponible.';
    const ERR_FILE_NOT_FOUND = 'messages.minio.404';
    protected $client;
    protected $listClient;
    protected $minioBucket;
    protected $minioRoot;
    protected $minioPathStyle;
    protected $minioSecure;

    public function __construct($rootPath, $minioUrl, $minioKey, $minioSecret, $minioBucket, $minioRoot, $minioPathstyle, $minioSecure)
    {
        $this->rootPath = $rootPath;
        $this->minioBucket = $minioBucket;
        $this->minioPathStyle = ($minioPathstyle==1?true:false);
        $this->minioRoot = $minioRoot;
        $this->client = $this->getClient($minioUrl, $minioKey, $minioSecret, $minioPathstyle, $minioSecure);
        $this->initBucket();
    }

    public function download(string $file, string $filename, bool $usecache = true)
    {
        // On s'assure que le repertoire temporaire de destination existe bien
        $fs = new Filesystem();
        $tmpdir=$this->rootPath."/var/tmp";
        $fs->mkdir($tmpdir."/".dirname($filename));

        // Approche repassant par le serveur d'appel
        if(!$usecache||!$fs->exists($tmpdir.'/'.$filename)) {
            try {
                $result = $this->client->getObject([
                    'Bucket' => $this->minioBucket,
                    'Key' => $this->minioRoot.$file,
                    'SaveAs' => $tmpdir.'/'.$filename,
                ]);
            } catch (S3Exception $e) {
                switch ($e->getResponse()->getStatusCode()) {
                    case 404:
                        throw new NotFoundHttpException($this->translator->trans(self::ERR_FILE_NOT_FOUND, [], 'messages'));
                    break;
                    default:
                        \Sentry\captureException($e);
                        throw new Exception(self::ERR_UNAVAILABLE);
                    break;
                }
            } catch (Exception $e) {
                \Sentry\captureException($e);
                throw new Exception(self::ERR_UNAVAILABLE);
            }
        }

        return $tmpdir.'/'.$filename;
    }

    public function upload($file, $filename, $deleteSource = false)
    {
        try {
            $this->client->putObject([
                'Bucket' => $this->minioBucket,
                'Key' => $this->minioRoot.$filename,
                'SourceFile' => $file,
            ]);
        } catch (Exception $e) {
            \Sentry\captureException($e);
            throw new Exception(self::ERR_UNAVAILABLE);
        }

        if ($deleteSource) {
            $tmpdir=$this->rootPath."/var/tmp";           
            @unlink($tmpdir."/".$filename);
        }
    }

    /**
     * move.
     *
     * @param bool $deleteSource
     *
     * @return void
     */
    public function move(string $from, string $to, $deleteSource = false)
    {
        try {
            $this->client->copyObject([
                'Bucket' => $this->minioBucket,
                'Key' => $this->minioRoot.$to,
                'CopySource' => $this->minioBucket.'/'.$this->minioRoot.$from,
            ]);
        } catch (Exception $e) {
            \Sentry\captureException($e);
            throw new Exception(self::ERR_UNAVAILABLE);
        }

        if ($deleteSource) {
            $this->delete($from);
        }
    }

    /**
     * delete.
     *
     * @return void
     */
    public function delete(string $file)
    {
        try {
            $this->client->deleteObject([
                'Bucket' => $this->minioBucket,
                'Key' => $this->minioRoot.$file,
            ]);
        } catch (Exception $e) {
            \Sentry\captureException($e);
            throw new Exception(self::ERR_UNAVAILABLE);
        }
    }

    /**
     * countKeys.
     *
     * @return int
     */
    public function countKeys(string $prefix)
    {
        //On utilise un path spécifique car listObjectsV2 utilise une autre config de client
        try {
            $response = $this->client->listObjectsV2([
                'Bucket' => $this->minioBucket,
                'Prefix' => $prefix,
            ]);

            return $response->get('KeyCount');
        } catch (Exception $e) {
            \Sentry\captureException($e);
            throw new Exception(self::ERR_UNAVAILABLE);
        }
    }

    /**
     * listKeys.
     *
     * @return array
     */
    public function listKeys(string $prefix)
    {
        //On utilise un path spécifique car listObjectsV2 utilise une autre config de client
        try {
            $response = $this->client->listObjectsV2([
                'Bucket' => $this->minioBucket,
                'Prefix' => $prefix,
            ]);

            return $response->get('Contents');
        } catch (Exception $e) {
            \Sentry\captureException($e);
            throw new Exception(self::ERR_UNAVAILABLE);
        }
    }

    /**
     * download.
     *
     * @param string $file       Nom du fichier dans minio
     * @param string $filename   Nom du fichier dans la réponse
     * @param bool   $returnFile Retourner un fichier ou une réponse
     */


    protected function getClient($minioUrl, $minioKey, $minioSecret, bool $minioPathstyle, bool $minioSecure)
    {
        $client = new \Aws\S3\S3Client([
            'version' => 'latest',
            'region' => 'eu-west-1',
            'endpoint' => $minioUrl,
            //On force le mode DNS
            'use_path_style_endpoint' => $minioPathstyle,
            'credentials' => [
                'key' => $minioKey,
                'secret' => $minioSecret,
            ],
            //On désactive les checks SSL pour le moment
            'http' => [
                'verify' => $minioSecure,
            ],
        ]);

        return $client;
    }

    protected function initBucket()
    {
        try {
            $bucketExists = false;

            $buckets = $this->client->listBuckets()->toArray()['Buckets'];

            foreach ($buckets as $bucket) {
                if ($this->minioBucket == $bucket['Name']) {
                    $bucketExists = true;
                }
            }

            if (!$bucketExists) {
                $this->client->createBucket([
                    'Bucket' => $this->minioBucket,
                ]);
            }
        } catch (Exception $e) {
            throw new Exception(self::ERR_UNAVAILABLE);
        }
    }
}