<?php

declare(strict_types=1);

use App\App\Bootstrap;
use App\Admin\Auth;
use App\Storage\JsonStore;

require dirname(__DIR__) . '/src/autoload.php';
Bootstrap::init();

$auth = new Auth();
$auth->requireLogin();

$id = trim((string) ($_GET['id'] ?? ''));
$field = trim((string) ($_GET['field'] ?? ''));
$index = (int) ($_GET['index'] ?? -1);

$store = new JsonStore();
$submission = $store->getSubmissionByKey($id);
if ($submission === null) {
    http_response_code(404);
    echo 'Antrag nicht gefunden.';
    exit;
}

$entry = $submission['uploads'][$field][$index] ?? null;
if (!is_array($entry)) {
    http_response_code(404);
    echo 'Datei nicht gefunden.';
    exit;
}

$app = Bootstrap::config('app');
$base = rtrim((string) $app['storage']['uploads'], '/');
$relativePath = (string) ($entry['relative_path'] ?? '');
$relativePath = str_replace(['..', '\\'], '', $relativePath);
$fullPath = $base . '/' . ltrim($relativePath, '/');

if (!is_file($fullPath)) {
    http_response_code(404);
    echo 'Datei nicht vorhanden.';
    exit;
}

$downloadName = (string) ($entry['original_filename'] ?? basename($fullPath));
$downloadName = str_replace(["\r", "\n"], '', $downloadName);
$fallbackName = preg_replace('/[^A-Za-z0-9._-]/', '_', $downloadName) ?: 'download.bin';
$encodedName = rawurlencode($downloadName);

header('Content-Type: ' . ((string) ($entry['mime'] ?? 'application/octet-stream')));
header('Content-Length: ' . (string) filesize($fullPath));
header('Content-Disposition: attachment; filename="' . $fallbackName . '"; filename*=UTF-8\'\'' . $encodedName);
readfile($fullPath);
exit;