<?php

namespace App\Command;

use App\Entity\Demande;
use App\Entity\Place;
use App\Repository\DemandeRepository;
use App\Repository\PlaceRepository;
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\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

#[AsCommand(
    name: 'app:link-demandes-places',
    description: 'Link Demandes to Places based on name similarity',
)]
class LinkDemandesPlacesCommand extends Command
{
    private EntityManagerInterface $entityManager;
    private DemandeRepository $demandeRepository;
    private PlaceRepository $placeRepository;

    public function __construct(
        EntityManagerInterface $entityManager,
        DemandeRepository $demandeRepository,
        PlaceRepository $placeRepository
    ) {
        parent::__construct();
        $this->entityManager = $entityManager;
        $this->demandeRepository = $demandeRepository;
        $this->placeRepository = $placeRepository;
    }

    protected function configure(): void
    {
        $this
            ->addOption('threshold', null, InputOption::VALUE_REQUIRED, 'Similarity threshold (0-100)', 70)
            ->addOption('dry-run', null, InputOption::VALUE_NONE, 'Show matches without linking');
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);
        $io->title('Linking Demandes to Places based on name similarity');

        $threshold = (int) $input->getOption('threshold');
        $dryRun = $input->getOption('dry-run');

        if ($threshold < 0 || $threshold > 100) {
            $io->error('Threshold must be between 0 and 100');
            return Command::FAILURE;
        }

        // Find all Demandes without linked Places
        $demandesWithoutPlace = $this->demandeRepository->createQueryBuilder('d')
            ->where('d.place IS NULL')
            ->getQuery()
            ->getResult();

        if (empty($demandesWithoutPlace)) {
            $io->warning('No Demandes without linked Places found.');
            return Command::SUCCESS;
        }

        $io->info(sprintf('Found %d Demandes without linked Places.', count($demandesWithoutPlace)));

        // Process each Demande
        $linkedCount = 0;
        /** @var Demande $demande */
        foreach ($demandesWithoutPlace as $demande) {
            $query = $demande->getQuery();
            $insee = $demande->getInsee();

            if (empty($query)) {
                continue;
            }

            // Find Places with similar names
            $places = $this->findSimilarPlaces($query, $insee);
            if (empty($places)) {
                continue;
            }

            // Find the best match
            $bestMatch = null;
            $bestSimilarity = 0;
            foreach ($places as $place) {
                $similarity = $this->calculateSimilarity($query, $place->getName());
                if ($similarity > $bestSimilarity) {
                    $bestSimilarity = $similarity;
                    $bestMatch = $place;
                }
            }

            // If similarity is above threshold, link the Demande to the Place
            if ($bestMatch && $bestSimilarity >= $threshold) {
                $io->text(sprintf(
                    'Match found: "%s" (Demande) -> "%s" (Place) with similarity %d%%',
                    $query,
                    $bestMatch->getName(),
                    $bestSimilarity
                ));

                if (!$dryRun) {
                    $demande->setPlace($bestMatch);
                    $demande->setPlaceUuid($bestMatch->getUuidForUrl());
                    $demande->setStatus('linked_to_place');
                    $this->entityManager->persist($demande);
                    $linkedCount++;
                }
            }
        }

        if (!$dryRun && $linkedCount > 0) {
            $this->entityManager->flush();
            $io->success(sprintf('Linked %d Demandes to Places.', $linkedCount));
        } elseif ($dryRun) {
            $io->info('Dry run completed. No changes were made.');
        } else {
            $io->info('No Demandes were linked to Places.');
        }

        return Command::SUCCESS;
    }

    /**
     * Find Places with names similar to the query
     */
    private function findSimilarPlaces(string $query, ?int $insee): array
    {
        $queryBuilder = $this->placeRepository->createQueryBuilder('p')
            ->where('p.name IS NOT NULL');

        // If INSEE code is available, filter by Stats zone
        if ($insee !== null) {
            $queryBuilder
                ->join('p.stats', 's')
                ->andWhere('s.zone = :insee')
                ->setParameter('insee', (string) $insee);
        }

        // Use LIKE for initial filtering to reduce the number of results
        $queryBuilder
            ->andWhere('p.name LIKE :query')
            ->setParameter('query', '%' . $this->sanitizeForLike($query) . '%');

        return $queryBuilder->getQuery()->getResult();
    }

    /**
     * Calculate similarity between two strings (0-100)
     */
    private function calculateSimilarity(string $str1, string $str2): int
    {
        // Normalize strings for comparison
        $str1 = $this->normalizeString($str1);
        $str2 = $this->normalizeString($str2);

        // If either string is empty after normalization, return 0
        if (empty($str1) || empty($str2)) {
            return 0;
        }

        // Calculate Levenshtein distance
        $levenshtein = levenshtein($str1, $str2);
        $maxLength = max(strlen($str1), strlen($str2));

        // Convert to similarity percentage (0-100)
        $similarity = (1 - $levenshtein / $maxLength) * 100;

        return (int) $similarity;
    }

    /**
     * Normalize a string for comparison
     */
    private function normalizeString(string $str): string
    {
        // Convert to lowercase
        $str = mb_strtolower($str);

        // Remove accents
        $str = transliterator_transliterate('Any-Latin; Latin-ASCII', $str);

        // Remove special characters and extra spaces
        $str = preg_replace('/[^a-z0-9\s]/', '', $str);
        $str = preg_replace('/\s+/', ' ', $str);

        return trim($str);
    }

    /**
     * Sanitize a string for use in LIKE queries
     */
    private function sanitizeForLike(string $str): string
    {
        return str_replace(['%', '_'], ['\%', '\_'], $str);
    }
}