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<?php

namespace Plesk\Wappspector\Command;

use FilesystemIterator;
use JsonException;
use Plesk\Wappspector\MatchResult\MatchResultInterface;
use Plesk\Wappspector\Wappspector;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use SplFileInfo;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\Table;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Logger\ConsoleLogger;
use Symfony\Component\Console\Output\OutputInterface;
use Throwable;

#[AsCommand(name: 'wappspector:inspect')]
class Inspect extends Command
{
    public function __construct(private Wappspector $wappspector)
    {
        parent::__construct();
        $this->addArgument('path', InputArgument::OPTIONAL, 'Root path', getcwd());
        $this->addOption('json', '', InputOption::VALUE_NONE, 'JSON output');
        $this->addOption('recursive', '', InputOption::VALUE_NEGATABLE, 'Traverse directories recursive', true);
        $this->addOption('depth', '', InputOption::VALUE_OPTIONAL, 'Depth of recurse', 1);
        $this->addOption(
            'max',
            '',
            InputOption::VALUE_REQUIRED,
            'Maximum number of technologies that can be found for directory. Default = 0 (no limit)',
            0
        );
    }

    public function execute(InputInterface $input, OutputInterface $output): int
    {
        $isJson = (bool)$input->getOption('json');
        $logger = new ConsoleLogger($output);
        $result = [];
        $matchersLimit = (int)$input->getOption('max');

        try {
            foreach ($this->getPath($input) as $path) {
                $result = [...$result, ...$this->wappspector->run($path, '/', $matchersLimit)];
            }
            $result = $this->filterResults($result);

            if ($isJson) {
                $this->jsonOutput($output, $result);
                return Command::SUCCESS;
            }

            $this->tableOutput($output, $result);

            return Command::SUCCESS;
        } catch (Throwable $exception) {
            $logger->error($exception->getMessage());
            return Command::FAILURE;
        }
    }

    /**
     * @throws JsonException
     */
    private function jsonOutput(OutputInterface $output, array $result): void
    {
        $output->writeln(json_encode($result, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR));
    }

    /**
     * @param MatchResultInterface[] $matchers
     * @return void
     */
    private function tableOutput(OutputInterface $output, array $matchers): void
    {
        $rows = [];

        foreach ($matchers as $matchResult) {
            $rows[] = [
                $matchResult->getId(),
                $matchResult->getName(),
                $matchResult->getPath(),
                $matchResult->getVersion() ?? '-',
            ];
        }

        $table = new Table($output);
        $table
            ->setHeaders(['ID', 'Technology', 'Path', 'Version'])
            ->setRows($rows);
        $table->render();
    }

    private function getPath(InputInterface $input): iterable
    {
        $path = $input->getArgument('path');
        $path = realpath($path);
        if (!$input->getOption('recursive')) {
            yield $path;
            return;
        }

        $flags = FilesystemIterator::KEY_AS_PATHNAME
            | FilesystemIterator::CURRENT_AS_FILEINFO
            | FilesystemIterator::SKIP_DOTS;
        $itFlags = RecursiveIteratorIterator::SELF_FIRST;
        $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path, $flags), $itFlags);
        $it->setMaxDepth((int)$input->getOption('depth'));

        foreach ($it as $path => $item) {
            /** @var SplFileInfo $item */
            if (str_contains($path, '/.')) {
                continue;
            }
            if (!$item->isDir()) {
                continue;
            }
            yield $path;
        }
    }

    /**
     * @param MatchResultInterface[] $result
     * @return MatchResultInterface[]
     */
    private function filterResults(array $result): array
    {
        return array_values(
            array_filter($result, static function (MatchResultInterface $matcher) {
                static $uniq = [];
                $key = $matcher->getId() . ':' . $matcher->getPath();
                if (array_key_exists($key, $uniq)) {
                    return false;
                }
                $uniq[$key] = true;
                return true;
            })
        );
    }
}
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