<?php
declare(strict_types=1);

namespace App\Game\Service;

use App\Game\Entity\Game;
use App\Game\Entity\Player;
use App\Game\Entity\Session;
use App\Game\Entity\SessionSetting;
use App\Game\Enum\GameStatus;
use App\Game\Enum\SessionSettingType;
use App\Game\Enum\SessionStatus;
use App\Game\Repository\GameRepository;
use App\Game\Repository\SessionRepository;
use App\Tech\Entity\User;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Security\Core\User\UserInterface;

final class GameDashboardService
{
    public function __construct(
        private readonly GameRepository $gameRepository,
        private readonly SessionRepository $sessionRepository,
        private readonly EntityManagerInterface $entityManager,
    ) {
    }

    /**
     * @return Session[]
     */
    public function getSessionsForUser(UserInterface $user): array
    {
        return $this->sessionRepository->createQueryBuilder('s')
            ->innerJoin('s.players', 'p')
            ->where('p.user = :user')
            ->setParameter('user', $user)
            ->getQuery()
            ->getResult();
    }

    /**
     * @return Game[]
     */
    public function getAvailableGames(bool $isAdmin): array
    {
        if ($isAdmin) {
            return $this->gameRepository->findAll();
        }

        return $this->gameRepository->findBy(['status' => GameStatus::OPEN]);
    }

    public function createSession(Game $game, UserInterface $user, bool $isAdmin): ?Session
    {
        if ($game->getStatus() !== GameStatus::OPEN && !$isAdmin) {
            return null;
        }

        if(!$user instanceof User)
            return null;

        $session = new Session();
        $session->setGame($game);
        $session->setStatus(SessionStatus::CREATED);
        $session->setTimer(0);

        $player = new Player();
        $player->setUser($user);
        $player->setSession($session);
        $player->setScreen(1);

        $this->entityManager->persist($session);
        $this->entityManager->persist($player);
        $this->entityManager->flush();

        return $session;
    }

    public function generateInviteCode(Session $session, UserInterface $user, bool $isAdmin): ?string
    {
        // Security check: is user part of this session?
        $isPlayer = false;
        foreach ($session->getPlayers() as $player) {
            if ($player->getUser() === $user) {
                $isPlayer = true;
                break;
            }
        }

        if (!$isPlayer && !$isAdmin) {
            return null;
        }

        $inviteCode = bin2hex(random_bytes(4));

        $setting = null;
        foreach ($session->getSettings() as $s) {
            if ($s->getName() === SessionSettingType::INVITE_CODE) {
                $setting = $s;
                break;
            }
        }

        if (!$setting) {
            $setting = new SessionSetting();
            $setting->setSession($session);
            $setting->setName(SessionSettingType::INVITE_CODE);
        }

        $setting->setValue($inviteCode);
        $this->entityManager->persist($setting);
        $this->entityManager->flush();

        return $inviteCode;
    }
}