<?php
namespace Espo\Custom\Hooks\CAkten;

use Espo\ORM\Entity;
use Espo\ORM\Repository\Option\SaveOptions;
use Espo\Core\Hook\Hook\BeforeSave;

/**
 * Hook: Aktualisiert lastSync basierend auf dem neuesten lastSyncTimestamp
 * der verknüpften Dokumente
 */
class UpdateLastSyncFromDocuments implements BeforeSave
{
    public function __construct(
        private \Espo\ORM\EntityManager $entityManager
    ) {}

    public function beforeSave(Entity $entity, SaveOptions $options): void
    {
        // Überspringe, wenn skipHooks gesetzt ist (verhindert Loops)
        if ($options->get('skipHooks')) {
            return;
        }

        // Nur wenn Entity bereits existiert (nicht bei Create)
        if ($entity->isNew()) {
            return;
        }

        try {
            $pdo = $this->entityManager->getPDO();
            $aktenId = $entity->getId();

            // Hole das neueste lastSyncTimestamp aller verknüpften Dokumente
            $stmt = $pdo->prepare(
                "SELECT MAX(last_sync_timestamp) AS maxLastSync
                 FROM c_dokumente
                 WHERE c_akten_id = :aktenId AND deleted = 0 AND last_sync_timestamp IS NOT NULL"
            );
            $stmt->execute([':aktenId' => $aktenId]);
            $result = $stmt->fetch(\PDO::FETCH_ASSOC);

            if ($result && $result['maxLastSync']) {
                $entity->set('lastSync', $result['maxLastSync']);
            }

            // Berechne syncStatus basierend auf verknüpften Dokumenten
            $this->updateSyncStatus($entity, $pdo, $aktenId);

        } catch (\Exception $e) {
            $GLOBALS['log']->error('CAkten UpdateLastSyncFromDocuments Hook Error: ' . $e->getMessage());
        }
    }

    private function updateSyncStatus(Entity $entity, \PDO $pdo, string $aktenId): void
    {
        $stmt = $pdo->prepare(
            "SELECT sync_status FROM c_dokumente
             WHERE c_akten_id = :aktenId AND deleted = 0"
        );
        $stmt->execute([':aktenId' => $aktenId]);
        $rows = $stmt->fetchAll(\PDO::FETCH_ASSOC);

        if (empty($rows)) {
            $entity->set('syncStatus', 'unclean');
            return;
        }

        $hasUnsynced = false;
        $hasFailed = false;

        foreach ($rows as $row) {
            $status = $row['sync_status'] ?? null;

            if ($status === 'failed') {
                $hasFailed = true;
            }

            if ($status === 'new' || $status === 'unclean' || $status === null || $status === '') {
                $hasUnsynced = true;
            }
        }

        if ($hasFailed) {
            $entity->set('syncStatus', 'failed');
        } elseif ($hasUnsynced) {
            $entity->set('syncStatus', 'unclean');
        } else {
            $entity->set('syncStatus', 'synced');
        }
    }
}