<?php

declare(strict_types=1);

namespace App\Command;

use App\Entity\LogEntry;
use App\Repository\LogEntryRepository;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

#[AsCommand(
    name: 'app:log-entry:backfill-error-codes',
    description: 'Backfills error_code column from extra data in existing log entries'
)]
class LogEntryBackfillErrorCodesCommand extends Command
{
    private const BATCH_SIZE = 100;

    public function __construct(
        private readonly LogEntryRepository $logEntryRepository,
        private readonly EntityManagerInterface $entityManager,
    ) {
        parent::__construct();
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);

        $io->info('Starting backfill of error codes...');

        $totalProcessed = 0;
        $totalUpdated = 0;

        while (true) {
            $entries = $this->logEntryRepository->createQueryBuilder('l')
                ->where('l.errorCode IS NULL')
                ->andWhere('l.extra LIKE :pattern')
                ->setParameter('pattern', '%error_code%')
                ->orderBy('l.id', 'ASC')
                ->setMaxResults(self::BATCH_SIZE)
                ->getQuery()
                ->getResult();

            if ([] === $entries) {
                break;
            }

            foreach ($entries as $entry) {
                /** @var LogEntry $entry */
                $extra = $entry->getExtra();
                if (isset($extra['error_code']) && null === $entry->getErrorCode()) {
                    $entry->setErrorCode($extra['error_code']);
                    ++$totalUpdated;
                }
                ++$totalProcessed;
            }

            $this->entityManager->flush();
            $this->entityManager->clear();

            $io->writeln(sprintf('Processed %d entries, %d updated so far', $totalProcessed, $totalUpdated));
        }

        $message = sprintf('Backfill complete. Processed %d entries, updated %d with error codes.', $totalProcessed, $totalUpdated);
        $io->success($message);

        return Command::SUCCESS;
    }
}