<?php

namespace App\Controller;

use App\Content\Consent;
use App\Content\DemoContent;
use App\Content\PageRepository;
use App\Content\RedirectRepository;
use App\Content\SiteSettings;
use App\Domain\InvalidPage;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;

final class SettingsController extends AbstractController
{
    public function __construct(private SiteSettings $settings, private RedirectRepository $redirects, private PageRepository $pages)
    {
    }

    #[Route('/admin/settings', name: 'admin_settings', methods: ['GET'])]
    public function index(Request $request): Response
    {
        $choosable = [];
        foreach ($this->pages->listForEditor() as $page) {
            // Only a published page can serve as the root; a draft would answer every visit with 404.
            if ('page' === $page['type'] && null !== $page['published_revision_id']) {
                $document = json_decode($page['document'] ?? '{}', true, 512, JSON_THROW_ON_ERROR);
                $choosable[] = ['path' => $page['path'], 'title' => $document['title'] ?? $page['path']];
            }
        }

        return $this->render('admin/settings.html.twig', [
            'settings' => $this->settings->load(),
            'redirects' => $this->redirects->all($request->query->getInt('seite', 1)),
            'choosableHome' => $choosable,
            'consentGroups' => Consent::GROUPS,
            'missingLegal' => $this->settings->missingLegalPages(),
            'consentGroupHelp' => Consent::GROUP_HELP,
        ]);
    }

    #[Route('/admin/settings/company', name: 'admin_settings_save', methods: ['POST'])]
    public function save(Request $request): Response
    {
        $this->denyAccessUnlessGranted('ROLE_EDITOR');
        if (!$this->isCsrfTokenValid('settings', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        try {
            $this->settings->save($request->request->all());
        } catch (InvalidPage $e) {
            return $this->back($e->getMessage());
        }

        return $this->back('Die Unternehmensdaten wurden gespeichert.', 'success');
    }

    #[Route('/admin/settings/redirects', name: 'admin_redirect_save', methods: ['POST'])]
    public function saveRedirect(Request $request): Response
    {
        $this->denyAccessUnlessGranted('ROLE_EDITOR');
        if (!$this->isCsrfTokenValid('settings', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        $remove = $request->request->getString('remove');
        if ('' !== $remove) {
            $this->redirects->delete($remove);

            return $this->back('Die Weiterleitung wurde entfernt.', 'success');
        }
        try {
            $this->redirects->save(
                $request->request->getString('from'),
                $request->request->getString('to'),
                $request->request->getInt('status', 301),
            );
        } catch (InvalidPage $e) {
            return $this->back($e->getMessage());
        }

        return $this->back('Die Weiterleitung wurde gespeichert.', 'success');
    }

    /**
     * Creates the privacy statement and the imprint, with a skeleton whose gaps are marked.
     *
     * The pages are mandatory, the text is not something a CMS can write: what gets created is the
     * structure with every required item named and marked as still to be filled in.
     */
    #[Route('/admin/settings/rechtliches', name: 'admin_legal_pages', methods: ['POST'])]
    public function legalPages(Request $request): Response
    {
        $this->denyAccessUnlessGranted('ROLE_EDITOR');
        if (!$this->isCsrfTokenValid('settings', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        $settings = $this->settings->load();
        $created = [];
        try {
            foreach (DemoContent::LEGAL as $slug => $label) {
                $key = 'datenschutz' === $slug ? 'privacyPath' : 'imprintPath';
                // An existing page is never overwritten - it may already carry the real text.
                $existing = null !== $this->pages->findPublished($slug) || $this->pageExists($slug);
                if (!$existing) {
                    $id = $this->pages->createPage($slug, null, 'page', DemoContent::legalPage($slug));
                    $page = $this->pages->findForEditor($id);
                    $this->pages->publish($id, $page['draft_revision_id'], $page['version']);
                    $created[] = $label;
                }
                $settings[$key] = $slug;
            }
            $this->settings->save([...$settings, 'consentGroups' => $settings['consentGroups'], 'sameAs' => implode('
', $settings['sameAs'])]);
        } catch (InvalidPage $e) {
            return $this->back($e->getMessage());
        }

        return $this->back(
            [] === $created
                ? 'Die Seiten waren schon vorhanden und sind jetzt verknüpft. Der Inhalt bleibt unverändert.'
                : sprintf('%s angelegt und verknüpft. Beide Seiten sind veröffentlicht und müssen noch ausgefüllt werden – die Pflichtangaben sind darin markiert.', implode(' und ', $created)),
            'success',
        );
    }

    /** Also finds a page that exists but is not published yet. */
    private function pageExists(string $path): bool
    {
        foreach ($this->pages->listForEditor() as $page) {
            if ($path === $page['path']) {
                return true;
            }
        }

        return false;
    }

    private function back(string $message, string $type = 'error'): Response
    {
        $this->addFlash($type, $message);

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