<?php

namespace App\Service;

use App\Entity\Book;
use App\Entity\File;
use App\Repository\FileRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\HttpFoundation\File\UploadedFile;

class FileService
{
    private Filesystem $fileSystem;
    private string $bookFiles;
    private FileRepository $fileRepository;

    public function __construct(string $bookFiles, FileSystem $filesystem, FileRepository $fileRepository,)
    {
        $this->bookFiles = $bookFiles;
        $this->fileSystem = $filesystem;
        $this->fileRepository = $fileRepository;
    }

    /**
     * @param Collection|File $files
     * @return void
     */
    public function removeFiles(Collection|File $files)
    {
        if (!$files instanceof Collection) {
            $files = new ArrayCollection([$files]);
        }

        foreach ($files as $file) {
            $this->fileSystem->remove($this->getFilePath($file));
        }
    }

    public function getFilePath(File $file): string
    {
        return $this->bookFiles . DIRECTORY_SEPARATOR . $this->getFileName($file);
    }

    public function getFileName(File $file): string
    {
        return 'ebook_' . $file->getBook()->getId() . '_' .
            md5($file->getFileName()) . '.' .
            $file->getExtension();
    }

    /**
     * @param UploadedFile $ebook
     * @param Book $book
     * @return File
     */
    public function saveFile(UploadedFile $ebook, Book $book): File
    {
        $file = new File();
        $file->setFileName(trim($ebook->getClientOriginalName()));
        $file->setFileSize($ebook->getSize());
        $file->setExtension($ebook->guessClientExtension());
        $file->setBook($book);
        $this->fileRepository->add($file, true);

        $ebook->move(
            $this->bookFiles,
            $this->getFileName($file)
        );
        return $file;
    }

}