<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Storage;
use ZipArchive;

class BackupController extends Controller
{
    public function download()
    {
        // Security: Only super admins can download backups containing all tenant data
        if (!auth()->user()->isSuperAdmin()) {
            abort(403, 'Seuls les super administrateurs peuvent télécharger des sauvegardes.');
        }

        $databaseName = env('DB_DATABASE');
        $userName = env('DB_USERNAME');
        $password = env('DB_PASSWORD');
        $host = env('DB_HOST', '127.0.0.1');

        $backupFileName = 'backup_quizzcabm_' . date('Y-m-d_H-i-s') . '.zip';
        $backupFilePath = storage_path('app/' . $backupFileName);
        
        $sqlDumpFilePath = storage_path('app/dump.sql');

        // Execute mysqldump
        $command = "mysqldump --user={$userName} --password={$password} --host={$host} {$databaseName} > " . escapeshellarg($sqlDumpFilePath);
        if (empty($password)) {
            $command = "mysqldump --user={$userName} --host={$host} {$databaseName} > " . escapeshellarg($sqlDumpFilePath);
        }

        exec($command);

        $zip = new ZipArchive;
        if ($zip->open($backupFilePath, ZipArchive::CREATE) === TRUE) {
            // Add DB dump
            if (file_exists($sqlDumpFilePath)) {
                $zip->addFile($sqlDumpFilePath, 'database.sql');
            }

            // Add documents specifically searching the local disk
            $allFiles = Storage::disk('local')->allFiles();
            foreach ($allFiles as $filePath) {
                $fullPath = Storage::disk('local')->path($filePath);
                // The zip structure will have a folder 'storage_files' containing the relative path
                $zip->addFile($fullPath, 'storage_files/' . $filePath);
            }

            $zip->close();
        }

        if (file_exists($sqlDumpFilePath)) {
            unlink($sqlDumpFilePath);
        }

        if (file_exists($backupFilePath)) {
            return response()->download($backupFilePath)->deleteFileAfterSend(true);
        }

        return back()->with('error', 'Erreur lors de la création de la sauvegarde.');
    }
}