<?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;

$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, status, total_images 
    FROM invoice_batches 
    WHERE id = ? AND tenant_id = ? AND uploaded_by = ?
");
$stmt->execute([$batchId, $tenantId, $userId]);
$batch = $stmt->fetch();

if (!$batch) {
    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]);

// In a real production environment, you would dispatch a job to a queue worker here.
// For now, the queue worker is a cron job that checks the `invoice_processing_queue` table.

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