<?php

namespace App\Controllers\Sistema;

use App\Controllers\BaseController;
use phpseclib3\Net\SFTP;

class Backups extends BaseController
{
    public function index()
    {
        helper('filesystem');
        // Muestra la vista con la lista de backups
        $files = directory_map(WRITEPATH . 'backups/', 1);
        return view('themes/vuexy/form/backups/backupList', ['files' => $files]);
    }

    public function create()
    {
        helper('filesystem');

        $filename = 'backup_' . date('Ymd_His') . '.sql';
        $path = WRITEPATH . 'backups/' . $filename;

        $dbConfig = config('Database')->default;

        $host = $dbConfig['hostname'];
        $username = $dbConfig['username'];
        $password = $dbConfig['password'];
        $database = $dbConfig['database'];

        $command = "mysqldump -h {$host} -u{$username} -p'{$password}' {$database} > {$path}";

        system($command, $retval);

        if ($retval !== 0) {
            throw new \RuntimeException("Error al crear el backup.");
        }

        // Enviar a SFTP
        $this->sendToSFTP($path, $filename);

        return redirect()->to(route_to('backupsList'))->with('message', 'Backup creado y enviado.');
    }

    public function restore($file)
    {
        $path = WRITEPATH . 'backups/' . $file;
        if (!file_exists($path)) {
            throw new \CodeIgniter\Exceptions\PageNotFoundException("Backup no encontrado.");
        }

        $db = \Config\Database::connect();
        $sql = file_get_contents($path);
        $db->query('SET FOREIGN_KEY_CHECKS=0;');
        $db->query($sql);
        $db->query('SET FOREIGN_KEY_CHECKS=1;');

        return redirect()->to('/backups')->with('message', 'Backup restaurado.');
    }

    private function sendToSFTP($localPath, $remoteFilename)
    {

        $sftpHost = 'sftp.hidrive.ionos.com';
        $sftpUser = 'erp2019';
        $sftpPass = 'Z2CjX7kd2h';
        $remotePath = '/users/erp2019/backups_erp/' . $remoteFilename;

        $sftp = new SFTP($sftpHost);

        if (!$sftp->login($sftpUser, $sftpPass)) {
            throw new \RuntimeException('Error de autenticación SFTP');
        }

        $fileContents = file_get_contents($localPath);

        if (!$sftp->put($remotePath, $fileContents)) {
            throw new \RuntimeException("No se pudo subir el backup al servidor SFTP.");
        }
        
    }
}