<?php declare(strict_types=1);
/*
 * This file is part of the SplendidBear Websites' projects.
 *
 * Copyright (c) 2026 @ www.splendidbear.org
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace App\Controller;

use App\Entity\User;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bridge\Twig\Mime\TemplatedEmail;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Mailer\MailerInterface;
use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;
use Symfony\Component\Routing\Attribute\Route;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;

/**
 * Class SecurityController
 *
 * @package  App\Controller
 * @author   Lang <https://www.splendidbear.org>
 * @category Class
 * @license  https://www.gnu.org/licenses/lgpl-3.0.en.html GNU Lesser General Public License
 * @link     www.splendidbear.org
 * @since    2026. 04. 11.
 */
class SecurityController extends AbstractController
{
    #[Route('/login', name: 'MineSeekerBundle_login')]
    public function login(AuthenticationUtils $authenticationUtils): Response
    {
        if ($this->getUser()) {
            return $this->redirectToRoute('MineSeekerBundle_homepage');
        }

        return $this->render('Security/login.html.twig', [
            'last_username' => $authenticationUtils->getLastUsername(),
            'error'         => $authenticationUtils->getLastAuthenticationError(),
        ]);
    }

    #[Route('/logout', name: 'MineSeekerBundle_logout', methods: ['POST'])]
    public function logout(): void
    {
        // Intercepted by the security firewall — never executed.
    }

    #[Route('/register', name: 'MineSeekerBundle_register')]
    public function register(
        Request $request,
        UserPasswordHasherInterface $hasher,
        EntityManagerInterface $em,
        MailerInterface $mailer,
    ): Response {
        if ($this->getUser()) {
            return $this->redirectToRoute('MineSeekerBundle_homepage');
        }

        $errors = [];

        if ($request->isMethod('POST')) {
            $username        = trim((string) $request->request->get('_username', ''));
            $email           = trim((string) $request->request->get('_email', ''));
            $password        = (string) $request->request->get('_password', '');
            $passwordConfirm = (string) $request->request->get('_password_confirm', '');

            if (mb_strlen($username) < 3) {
                $errors['username'] = 'Username must be at least 3 characters.';
            } elseif ($em->getRepository(User::class)->findOneBy(['username' => $username])) {
                $errors['username'] = 'This username is already taken.';
            }

            if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
                $errors['email'] = 'Please enter a valid email address.';
            } elseif ($em->getRepository(User::class)->findOneBy(['email' => $email])) {
                $errors['email'] = 'This email address is already registered.';
            }

            if (mb_strlen($password) < 6) {
                $errors['password'] = 'Password must be at least 6 characters.';
            } elseif ($password !== $passwordConfirm) {
                $errors['password_confirm'] = 'Passwords do not match.';
            }

            if (empty($errors)) {
                $token = bin2hex(random_bytes(32));

                $user = (new User())
                    ->setUsername($username)
                    ->setEmail($email)
                    ->setIsVerified(false)
                    ->setVerificationToken($token);

                $user->setPassword($hasher->hashPassword($user, $password));

                $em->persist($user);
                $em->flush();

                $activationUrl = $this->generateUrl(
                    'MineSeekerBundle_activate',
                    ['token' => $token],
                    UrlGeneratorInterface::ABSOLUTE_URL,
                );

                $mailer->send(
                    (new TemplatedEmail())
                        ->from('noreply@mineseeker.ninja')
                        ->to($email)
                        ->subject('Activate your MineSeeker account')
                        ->htmlTemplate('emails/activation.html.twig')
                        ->context([
                            'username'       => $username,
                            'activation_url' => $activationUrl,
                        ])
                );

                $this->addFlash('verify_email', $email);

                return $this->redirectToRoute('MineSeekerBundle_register');
            }
        }

        return $this->render('Security/register.html.twig', [
            'errors'        => $errors,
            'last_username' => $request->request->get('_username', ''),
            'last_email'    => $request->request->get('_email', ''),
        ]);
    }

    #[Route('/activate/{token}', name: 'MineSeekerBundle_activate')]
    public function activate(string $token, EntityManagerInterface $em): Response
    {
        $user = $em->getRepository(User::class)->findOneBy(['verificationToken' => $token]);

        if (!$user) {
            $this->addFlash('error', 'This activation link is invalid or has already been used.');
            return $this->redirectToRoute('MineSeekerBundle_login');
        }

        $user->setIsVerified(true)->setVerificationToken(null);
        $em->flush();

        $this->addFlash('success', 'Your account is now active. Welcome, ' . $user->getUsername() . '!');

        return $this->redirectToRoute('MineSeekerBundle_login');
    }
}