<?php

declare(strict_types=1);

namespace OCA\MailCalendarSync\Db;

use OCP\AppFramework\Db\QBMapper;
use OCP\IDBConnection;

/**
 * @extends QBMapper<LogEntry>
 */
class LogMapper extends QBMapper {

    public function __construct(IDBConnection $db) {
        parent::__construct($db, 'mcs_log', LogEntry::class);
    }

    /**
     * Get recent log entries for a user.
     *
     * @return LogEntry[]
     */
    public function findByUserId(string $userId, int $limit = 50, int $offset = 0): array {
        $qb = $this->db->getQueryBuilder();
        $qb->select('*')
            ->from($this->getTableName())
            ->where($qb->expr()->eq('user_id', $qb->createNamedParameter($userId)))
            ->orderBy('created_at', 'DESC')
            ->setMaxResults($limit)
            ->setFirstResult($offset);

        return $this->findEntities($qb);
    }

    /**
     * Create a log entry.
     */
    public function log(
        string $userId,
        string $eventUid,
        string $action,
        ?string $eventSummary = null,
        ?string $attendeeEmail = null,
        ?string $fromEmail = null,
        ?string $message = null,
    ): LogEntry {
        $entry = new LogEntry();
        $entry->setUserId($userId);
        $entry->setEventUid($eventUid);
        $entry->setAction($action);
        $entry->setEventSummary($eventSummary);
        $entry->setAttendeeEmail($attendeeEmail);
        $entry->setFromEmail($fromEmail);
        $entry->setMessage($message);
        $entry->setCreatedAt(date('Y-m-d H:i:s'));

        return $this->insert($entry);
    }

    /**
     * Delete old log entries (older than 30 days).
     */
    public function cleanupOld(int $days = 30): int {
        $qb = $this->db->getQueryBuilder();
        $cutoff = (new \DateTime("-{$days} days"))->format('Y-m-d H:i:s');

        $qb->delete($this->getTableName())
            ->where($qb->expr()->lt('created_at', $qb->createNamedParameter($cutoff)));

        return $qb->executeStatement();
    }
}