<?php

declare(strict_types=1);

namespace App\Services;

use Exception;

final class FileStorageService
{
    private string $storagePath;

    public function __construct()
    {
        $this->storagePath = $_ENV['STORAGE_PATH'] ?? dirname(__DIR__, 2) . '/storage';
    }

    public function store(array $file, string $tenantId, string $companyId): string
    {
        // 1. Validate MIME
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $mime = finfo_file($finfo, $file['tmp_name']);
        finfo_close($finfo);

        $allowedMimes = ['application/pdf', 'image/jpeg', 'image/png', 'image/webp', 'application/json', 'text/plain', 'text/xml', 'application/xml'];
        if (!in_array($mime, $allowedMimes)) {
            throw new Exception("نوع الملف غير مسموح به ({$mime})");
        }

        // 2. Generate path
        $dir = "{$this->storagePath}/invoices/{$tenantId}/{$companyId}";
        if (!is_dir($dir)) {
            mkdir($dir, 0775, true);
        }

        $extension = pathinfo($file['name'], PATHINFO_EXTENSION);
        $filename = hash('sha256', $file['name'] . time() . uniqid()) . '.' . $extension;
        $targetPath = "{$dir}/{$filename}";

        if (isset($file['error']) && $file['error'] !== UPLOAD_ERR_OK) {
            throw new Exception("حدث خطأ أثناء رفع الملف من المتصفح. كود الخطأ: " . $file['error']);
        }

        if (!move_uploaded_file($file['tmp_name'], $targetPath)) {
            // Fallback for some non-standard PHP environments
            if (!copy($file['tmp_name'], $targetPath)) {
                throw new Exception("فشل نقل الملف إلى المسار النهائي: " . $targetPath);
            }
        }

        return $targetPath;
    }

    public function getHash(string $filePath): string
    {
        return hash_file('sha256', $filePath);
    }
}