<?php
/**
 * Finalize Batch Endpoint
 * POST /v1/batches/finalize
 * 
 * Marks a batch as ready for processing.
 * Triggers background processing (or processes synchronously depending on setup).
 */

declare(strict_types=1);

use App\Core\Database;
use App\Middleware\AuthMiddleware;
use App\Core\Security;
use App\Services\InvoiceProcessor;

$decoded = AuthMiddleware::check();
$tenantId = $decoded['tenant_id'];
$userId = $decoded['user_id'];

$data = Security::sanitize(input());
$batchId = $data['batch_id'] ?? null;

if (!$batchId) {
    json_error('معرّف الدفعة مطلوب', 422);
}

$db = Database::getInstance();

// 1. Verify batch
$stmt = $db->prepare("
    SELECT id, tenant_id, status, total_images 
    FROM invoice_batches 
    WHERE id = ? AND uploaded_by = ?
");
$stmt->execute([$batchId, $userId]);
$batch = $stmt->fetch();

if (!$batch || ($decoded['role'] !== 'super_admin' && $batch['tenant_id'] !== $tenantId)) {
    json_error('الدفعة غير موجودة', 404);
}


if ($batch['status'] !== 'uploading') {
    json_error('تم إنهاء هذه الدفعة مسبقاً', 400);
}

if ($batch['total_images'] == 0) {
    json_error('لا يمكن إنهاء دفعة فارغة', 400);
}

// 2. Mark as processing
$stmt = $db->prepare("
    UPDATE invoice_batches 
    SET status = 'processing', updated_at = NOW() 
    WHERE id = ?
");
$stmt->execute([$batchId]);

// 3. Trigger the worker via a "Fire and Forget" HTTP request
// This ensures processing starts immediately but the mobile app doesn't timeout.
$workerUrl = (isset($_SERVER['HTTPS']) ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . '/api/v1/batches/process-worker';
$postData = json_encode(['batch_id' => $batchId]);

$ch = curl_init($workerUrl);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 1); // Only wait 1 second
curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
@curl_exec($ch);
curl_close($ch);

json_success([
    'batch_id' => $batchId,
    'status' => 'processing',
    'total_images' => $batch['total_images']
], 'تم إنهاء الدفعة بنجاح وبدء المعالجة الفورية');