<?php
/**
 * Export all thesis files as a ZIP archive.
 *
 * The ZIP contains:
 *   - manifest.json   — maps every thesis to its files with DB-relevant metadata
 *   - files/           — mirror of storage/theses/ directory structure
 *
 * Thin dispatcher — delegates all data assembly to ExportController,
 * then streams the response.
 */
require_once __DIR__ . "/../../../bootstrap.php";
require_once __DIR__ . '/../../../src/AdminAuth.php';
AdminAuth::requireLogin();

require_once APP_ROOT . '/src/Controllers/ExportController.php';
require_once APP_ROOT . '/src/AdminLogger.php';

try {
    $controller = ExportController::create();

    // Build the zip
    $zipPath = $controller->createExportZip();

    $fileSize = filesize($zipPath);
    $fileCount = count($controller->getAllThesisFiles());

    // Audit log (before headers in case log fails — but it's best-effort anyway)
    AdminLogger::make()->logFilesExport($fileCount, (int)$fileSize);

    $filename = 'xamxam-files-' . date('Y-m-d') . '.zip';

    header('Content-Type: application/zip');
    header('Content-Disposition: attachment; filename="' . $filename . '"');
    header('Content-Length: ' . $fileSize);
    header('Cache-Control: no-cache, must-revalidate');

    readfile($zipPath);

    // Clean up temp file
    @unlink($zipPath);
} catch (Exception $e) {
    error_log('Files export error: ' . $e->getMessage());
    http_response_code(500);
    exit('Erreur lors de la création de l\'archive : ' . htmlspecialchars($e->getMessage()));
}

exit;