<?php

namespace App\Service;

use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Process\InputStream;
use Symfony\Component\Process\Process;

class BackupService
{
    public function __construct(private DatabaseCredentials $credentials)
    {
    }

    public function backup(string $db, ?string $fileName = null): string
    {
        if (!$fileName) {
            $fileName = sprintf('%s_backup.sql', $db);
        }

        $filesystem = new Filesystem();
        $process = new Process([
            'mysqldump',
            '-B', $db,
            '-u', $this->credentials->getUser(),
        ]);
        $process->setEnv(['MYSQL_PWD' => $this->credentials->getPassword()]);
        $process->run();
        $filesystem->dumpFile($fileName, $process->getOutput());

        return $fileName;
    }

    public function restore(string $db, string $fileName): void
    {
        $process = new Process([
            'mysql',
            '-u', $this->credentials->getUser(),
            $db,
        ]);

        $process->setEnv(['MYSQL_PWD' => $this->credentials->getPassword()]);
        $process->setInput(file_get_contents($fileName));
        $process->run();
    }
}