<?php

declare(strict_types=1);

namespace App\Command;

use App\BusProNet\ApiClient;
use App\BusProNet\Exception\ApiClientException;
use League\Flysystem\FilesystemException;
use League\Flysystem\FilesystemOperator;
use Psr\Log\LoggerInterface;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Contracts\Cache\CacheInterface;

#[AsCommand(
    name: 'app:bpn:fetch-travel',
    description: 'Fetches travel data directly from the BusProNet API and saves it to the XML export directory'
)]
class BpnFetchTravelCommand extends Command
{
    private const CACHE_KEYS_TO_INVALIDATE = [
        'bpn_travels_mapping',
    ];

    public function __construct(
        private readonly ApiClient $apiClient,
        private readonly FilesystemOperator $xmlExport,
        private readonly CacheInterface $cache,
        private readonly LoggerInterface $logger,
    ) {
        parent::__construct();
    }

    protected function configure(): void
    {
        $this
            ->addArgument('travel-id', InputArgument::REQUIRED, 'The travel product ID to fetch')
            ->addOption('filename', 'f', InputOption::VALUE_REQUIRED, 'Output filename (default: Ziel_{travel-id}.xml)')
            ->addOption('dry-run', null, InputOption::VALUE_NONE, 'Fetch and display info without saving');
    }

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

        $travelId = (int) $input->getArgument('travel-id');
        $filename = $input->getOption('filename') ?? sprintf('Ziel_%d.xml', $travelId);
        $dryRun = $input->getOption('dry-run');

        $io->text(sprintf('Fetching travel data for product ID %d...', $travelId));

        try {
            $xml = $this->apiClient->getTravelDataXml($travelId);
        } catch (ApiClientException $e) {
            $io->error(sprintf('API request failed: %s', $e->getMessage()));
            $this->logger->error('Failed to fetch travel data from API', [
                'travelId' => $travelId,
                'error' => $e->getMessage(),
            ]);

            return Command::FAILURE;
        }

        $io->text(sprintf('Received %d bytes of XML data', strlen($xml)));

        if ($dryRun) {
            $io->note('Dry-run mode: not saving to file');
            $io->text($xml);

            return Command::SUCCESS;
        }

        try {
            $this->xmlExport->write($filename, $xml);
        } catch (FilesystemException $e) {
            $io->error(sprintf('Failed to write file: %s', $e->getMessage()));
            $this->logger->error('Failed to write travel XML to file', [
                'travelId' => $travelId,
                'filename' => $filename,
                'error' => $e->getMessage(),
            ]);

            return Command::FAILURE;
        }

        $this->invalidateCaches();

        $io->success(sprintf('Saved to %s and invalidated travel mapping cache', $filename));
        $this->logger->info('Travel data fetched and saved', [
            'travelId' => $travelId,
            'filename' => $filename,
            'bytes' => strlen($xml),
        ]);

        return Command::SUCCESS;
    }

    private function invalidateCaches(): void
    {
        foreach (self::CACHE_KEYS_TO_INVALIDATE as $key) {
            $this->cache->delete($key);
        }
    }
}