<?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. If it's a single invoice, try processing it SYNCHRONOUSLY right now!
if ($batch['total_images'] == 1) {
    // We need the queue ID for this batch
    $queueStmt = $db->prepare("SELECT id FROM invoice_processing_queue WHERE batch_id = ? AND status = 'pending' LIMIT 1");
    $queueStmt->execute([$batchId]);
    $queueId = $queueStmt->fetchColumn();

    if ($queueId) {
        InvoiceProcessor::processQueueItem((int)$queueId);
    }
} else {
    // For multiple invoices, try triggering the worker in the background
    $workerPath = ROOT_PATH . '/app/cron/process_batches.php';
    $logPath = STORAGE_PATH . '/logs/cron.log';
    // Mute exec since it might fail depending on server config
    @exec("php " . escapeshellarg($workerPath) . " >> " . escapeshellarg($logPath) . " 2>&1 &");
}

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