<?php

declare(strict_types=1);

namespace App\Logger;

use App\Entity\LogEntry;
use Doctrine\ORM\EntityManagerInterface;
use Monolog\Handler\AbstractProcessingHandler;
use Monolog\Level;
use Monolog\LogRecord;

/**
 * Monolog handler that persists log entries to the database.
 *
 * Writes log records to the LogEntry entity, replacing message placeholders
 * with context values. Includes channel, context, and extra data for auditing.
 * Only processes INFO level and above to avoid storing debug messages.
 */
class DatabaseHandler extends AbstractProcessingHandler
{
    public function __construct(private readonly EntityManagerInterface $entityManager)
    {
        parent::__construct(Level::Info);
    }

    protected function write(LogRecord $record): void
    {
        $message = $this->replacePlaceHolder($record);

        $logEntry = new LogEntry($record->channel, $message);
        $logEntry
            ->setContext($record->context)
            ->setExtra($record->extra)
        ;

        $this->entityManager->persist($logEntry);
        $this->entityManager->flush();
    }

    private function replacePlaceHolder(LogRecord $record): string
    {
        $message = $record->message;

        if (!str_contains($message, '{')) {
            return $message;
        }

        $replacements = [];
        foreach ($record->context as $k => $v) {
            $replacements['{'.$k.'}'] = $v;
        }

        return strtr($message, $replacements);
    }
}