<?php

namespace App\Tests;

use App\Content\DemoContent;
use App\Content\DocumentValidator;
use App\Content\MenuRepository;
use App\Content\PageRepository;
use App\Infrastructure\ConnectionFactory;
use App\Kernel;
use App\Security\UserProvider;
use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Schema\Schema;
use DoctrineMigrations\Version20260912000100;
use DoctrineMigrations\Version20260912000200;
use DoctrineMigrations\Version20260912000300;
use DoctrineMigrations\Version20260912000400;
use DoctrineMigrations\Version20260912000500;
use Psr\Log\NullLogger;
use Symfony\Bundle\FrameworkBundle\KernelBrowser;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
use Symfony\Component\HttpFoundation\File\UploadedFile;

final class EditorSecurityTest extends WebTestCase
{
    private Connection $db;
    private string $path;
    private array $previous;

    protected static function getKernelClass(): string
    {
        return Kernel::class;
    }

    protected function setUp(): void
    {
        $this->path = tempnam(sys_get_temp_dir(), 'kant-auth-');
        $url = 'sqlite:///'.str_replace('\\', '/', $this->path);
        $this->previous = [$_SERVER, $_ENV];
        foreach (['APP_SECRET' => 'isolated-test-secret', 'DATABASE_URL' => $url, 'SITE_ORIGIN' => 'https://cms.test', 'MEDIA_DIRECTORY' => $this->path.'-media'] as $key => $value) {
            $_SERVER[$key] = $_ENV[$key] = $value;
        }
        $this->db = ConnectionFactory::create($url);
        $schema = new Schema();
        (new Version20260912000100($this->db, new NullLogger()))->up($schema);
        (new Version20260912000200($this->db, new NullLogger()))->up($schema);
        (new Version20260912000300($this->db, new NullLogger()))->up($schema);
        (new Version20260912000400($this->db, new NullLogger()))->up($schema);
        (new Version20260912000500($this->db, new NullLogger()))->up($schema);
        foreach ($schema->toSql($this->db->getDatabasePlatform()) as $sql) {
            $this->db->executeStatement($sql);
        }
        Version20260912000400::applyIndexes($this->db);
        $this->db->insert('website', ['id' => 'default', 'name' => 'Test', 'default_locale' => 'de', 'theme' => '{}']);
        $this->db->insert('page', ['id' => 'p1', 'slug' => 'home', 'path' => 'home', 'type' => 'page', 'locale' => 'de', 'website_id' => 'default', 'version' => 0, 'created_at' => gmdate('Y-m-d H:i:s')]);
        $pages = new PageRepository($this->db, new DocumentValidator());
        $revision = $pages->saveDraft('p1', DemoContent::pages()['home'], 0);
        $pages->publish('p1', $revision, 1);
        foreach (['admin' => 'ROLE_ADMIN', 'editor' => 'ROLE_EDITOR'] as $username => $role) {
            $this->db->insert('cms_user', ['id' => $username, 'username' => $username, 'password_hash' => password_hash('Fixture-only-password', PASSWORD_BCRYPT, ['cost' => 4]), 'roles' => json_encode([$role])]);
        }
    }

    protected function tearDown(): void
    {
        parent::tearDown();
        $this->db->close();
        gc_collect_cycles();
        unlink($this->path);
        foreach (glob($this->path.'-media/*') ?: [] as $file) {
            unlink($file);
        }
        if (is_dir($this->path.'-media')) {
            rmdir($this->path.'-media');
        }
        [$_SERVER, $_ENV] = $this->previous;
    }

    private function login(string $username = 'admin'): KernelBrowser
    {
        $client = self::createClient();
        $crawler = $client->request('GET', '/admin/login');
        $client->submit($crawler->selectButton('Anmelden')->form(['_username' => $username, '_password' => 'Fixture-only-password']));
        self::assertResponseRedirects('/admin');
        $client->followRedirect();
        self::assertResponseIsSuccessful();

        return $client;
    }

    private function data(KernelBrowser $client): array
    {
        $client->request('GET', '/admin/api/pages/p1');
        self::assertResponseIsSuccessful();

        return json_decode($client->getResponse()->getContent(), true, 512, JSON_THROW_ON_ERROR);
    }

    private function post(KernelBrowser $client, string $action, array $data, string $token = ''): void
    {
        $client->request('POST', '/admin/api/pages/p1/'.$action, server: ['CONTENT_TYPE' => 'application/json', 'HTTP_X_CSRF_TOKEN' => $token], content: json_encode($data));
    }

    public function testAnonymousCannotReadDraftOrWrite(): void
    {
        $client = self::createClient();
        foreach (['/admin', '/admin/pages/p1', '/admin/api/pages/p1', '/admin/media', '/admin/api/media', '/admin/menus'] as $url) {
            $client->request('GET', $url);
            self::assertResponseRedirects('http://localhost/admin/login');
            self::assertStringNotContainsString('schemaVersion', $client->getResponse()->getContent());
        }
        foreach (['draft', 'publish', 'preview'] as $action) {
            $this->post($client, $action, []);
            self::assertResponseRedirects('http://localhost/admin/login');
        }
        foreach ([['/admin/pages', ['title' => 'Geschmuggelt', 'slug' => 'geschmuggelt']], ['/admin/pages/p1/delete', ['expectedVersion' => 2]], ['/admin/menus/header', ['name' => 'X', 'expectedVersion' => 0]]] as [$url, $body]) {
            $client->request('POST', $url, $body);
            self::assertResponseRedirects('http://localhost/admin/login');
        }
        self::assertSame(1, (int) $this->db->fetchOne('SELECT COUNT(*) FROM page'));
    }

    public function testCreatingAPageNeedsACsrfTokenAndStartsAsAPrivateDraft(): void
    {
        $client = $this->login('editor');
        $client->request('POST', '/admin/pages', ['title' => 'Ohne Token', 'slug' => 'ohne-token', '_csrf_token' => 'wrong']);
        self::assertResponseRedirects('/admin');
        self::assertSame(1, (int) $this->db->fetchOne('SELECT COUNT(*) FROM page'));

        $crawler = $client->request('GET', '/admin');
        $client->submit($crawler->filter('.create-form')->form(['title' => 'Über uns', 'slug' => '', 'type' => 'page', 'parent_id' => '']));
        self::assertResponseRedirects();
        // The address is derived from the title when the field is left empty.
        self::assertSame('ueber-uns', $this->db->fetchOne('SELECT path FROM page WHERE slug <> ?', ['home']));
        // A new page is a draft, so it must not answer publicly yet.
        $client->request('GET', '/ueber-uns');
        self::assertResponseStatusCodeSame(404);
    }

    public function testEditorsAreNeitherOfferedNorAllowedToDelete(): void
    {
        $client = $this->login('editor');
        $crawler = $client->request('GET', '/admin');
        self::assertCount(0, $crawler->filter('.delete-panel'), 'An editor must not be offered the delete action.');
        $client->request('POST', '/admin/pages/p1/delete', ['_csrf_token' => $crawler->filter('input[name="_csrf_token"]')->last()->attr('value'), 'expectedVersion' => 2]);
        self::assertResponseStatusCodeSame(403);
        self::assertSame(1, (int) $this->db->fetchOne('SELECT COUNT(*) FROM page'));
    }

    public function testAdministratorsDeleteAPageWithAllRevisionsOnlyWithACsrfToken(): void
    {
        $client = $this->login('admin');
        $client->request('POST', '/admin/pages/p1/delete', ['_csrf_token' => 'wrong', 'expectedVersion' => 2]);
        self::assertResponseRedirects('/admin');
        self::assertSame(1, (int) $this->db->fetchOne('SELECT COUNT(*) FROM page'));

        $crawler = $client->request('GET', '/admin');
        $client->submit($crawler->filter('.delete-panel form')->form());
        self::assertResponseRedirects('/admin');
        self::assertSame(0, (int) $this->db->fetchOne('SELECT COUNT(*) FROM page'));
        self::assertSame(0, (int) $this->db->fetchOne('SELECT COUNT(*) FROM revision'));
        $client->request('GET', '/');
        self::assertResponseStatusCodeSame(404);
    }

    public function testMenuFormBuildsATreeFromFlatRowsAndReplacesTheFixedNavigation(): void
    {
        $client = $this->login('editor');
        $crawler = $client->request('GET', '/admin/menus');
        self::assertResponseIsSuccessful();

        // Rows are ordered by position and nested by level, so the form needs no JavaScript.
        $client->request('POST', '/admin/menus/header', [
            '_csrf_token' => $crawler->filter('.menu-form input[name="_csrf_token"]')->first()->attr('value'),
            'name' => 'Hauptnavigation',
            'expectedVersion' => 0,
            'items' => [
                ['position' => 30, 'level' => 1, 'label' => 'Extern', 'type' => 'url', 'url' => 'https://hausklar.app'],
                ['position' => 10, 'level' => 1, 'label' => 'Start', 'type' => 'page', 'pageId' => 'p1', 'anchor' => ''],
                ['position' => 20, 'level' => 2, 'label' => 'Kontakt', 'type' => 'page', 'pageId' => 'p1', 'anchor' => '#kontakt'],
                ['position' => 40, 'level' => 1, 'label' => '   ', 'type' => 'page', 'pageId' => 'p1'],
            ],
        ]);
        self::assertResponseRedirects('/admin/menus');

        $items = json_decode($this->db->fetchOne('SELECT items FROM menu WHERE slot = ?', ['header']), true);
        self::assertSame(['Start', 'Extern'], array_column($items, 'label'));
        self::assertSame('Kontakt', $items[0]['children'][0]['label']);
        // A leading hash in the anchor field is accepted and normalised away.
        self::assertSame('kontakt', $items[0]['children'][0]['anchor']);
        // The blank row is an add slot, not an entry.
        self::assertCount(2, $items);

        $public = $client->request('GET', '/')->filter('nav[aria-label="Hauptnavigation"] a');
        // The navigation comes from the menu now, not from the links hard-coded in the template.
        self::assertSame(['/', '/#kontakt', 'https://hausklar.app'], $public->extract(['href']));
    }

    public function testMenuWritesNeedAnEditorRoleACsrfTokenAndTheCurrentVersion(): void
    {
        $menus = new MenuRepository($this->db);
        $menus->save('header', 'Hauptnavigation', [['label' => 'Start', 'type' => 'page', 'pageId' => 'p1', 'anchor' => '', 'children' => []]], 0);

        $client = $this->login('editor');
        $crawler = $client->request('GET', '/admin/menus');
        $token = $crawler->filter('.menu-form input[name="_csrf_token"]')->first()->attr('value');
        $entry = ['position' => 10, 'level' => 1, 'label' => 'Geaendert', 'type' => 'page', 'pageId' => 'p1', 'anchor' => ''];

        $client->request('POST', '/admin/menus/header', ['_csrf_token' => 'wrong', 'name' => 'X', 'expectedVersion' => 1, 'items' => [$entry]]);
        self::assertResponseRedirects('/admin/menus');
        self::assertSame('Hauptnavigation', $this->db->fetchOne('SELECT name FROM menu WHERE slot = ?', ['header']));

        // A stale version must not overwrite a newer menu.
        $client->request('POST', '/admin/menus/header', ['_csrf_token' => $token, 'name' => 'Veraltet', 'expectedVersion' => 0, 'items' => [$entry]]);
        self::assertResponseRedirects('/admin/menus');
        self::assertSame('Hauptnavigation', $this->db->fetchOne('SELECT name FROM menu WHERE slot = ?', ['header']));

        // An unsafe target is refused with a message instead of being stored.
        $client->request('POST', '/admin/menus/header', ['_csrf_token' => $token, 'name' => 'Neu', 'expectedVersion' => 1, 'items' => [['position' => 10, 'level' => 1, 'label' => 'Boese', 'type' => 'url', 'url' => 'javascript:alert(1)']]]);
        $client->followRedirect();
        self::assertSelectorExists('.notice.error');
        self::assertStringNotContainsString('javascript:', $this->db->fetchOne('SELECT items FROM menu WHERE slot = ?', ['header']));

        $client->request('POST', '/admin/menus/header', ['_csrf_token' => $token, 'name' => 'Neu', 'expectedVersion' => 1, 'items' => [$entry]]);
        self::assertSame('Neu', $this->db->fetchOne('SELECT name FROM menu WHERE slot = ?', ['header']));
    }

    public function testMediaUploadReencodingCsrfMetadataConflictAndArchive(): void
    {
        $client = $this->login('editor');
        $client->request('GET', '/admin/api/media');
        self::assertResponseIsSuccessful();
        $token = json_decode($client->getResponse()->getContent(), true)['csrfToken'];
        $client->request('POST', '/admin/api/media/upload');
        self::assertResponseStatusCodeSame(403);
        $path = tempnam(sys_get_temp_dir(), 'kant-image-');
        try {
            file_put_contents($path, '<svg xmlns="http://www.w3.org/2000/svg"><script>alert(1)</script></svg>');
            $client->request('POST', '/admin/api/media/upload', files: ['file' => new UploadedFile($path, 'fake.jpg', test: true)], server: ['HTTP_X_CSRF_TOKEN' => $token]);
            self::assertResponseStatusCodeSame(422);
            self::assertSame(0, (int) $this->db->fetchOne('SELECT COUNT(*) FROM media'));
            $image = imagecreatetruecolor(1800, 1000);
            imagepng($image, $path);
            imagedestroy($image);
            file_put_contents($path, '<?php SECRET_SOURCE_PAYLOAD ?>', FILE_APPEND);
            $client->request('POST', '/admin/api/media/upload', files: ['file' => new UploadedFile($path, 'example.php', test: true)], server: ['HTTP_X_CSRF_TOKEN' => $token]);
            self::assertResponseStatusCodeSame(201);
            $item = json_decode($client->getResponse()->getContent(), true)['item'];
            self::assertSame([480, 960, 1600], array_column($item['variants'], 'width'));
            foreach ($item['variants'] as $variant) {
                $file = $this->path.'-media/'.$item['id'].'-'.$variant['width'].'.webp';
                self::assertSame('image/webp', getimagesize($file)['mime']);
                self::assertStringNotContainsString('SECRET_SOURCE_PAYLOAD', file_get_contents($file));
            }
            $update = ['title' => 'Testbild', 'alt' => 'Dunkle Testfläche', 'version' => 1, 'archived' => true];
            $client->request('POST', '/admin/api/media/'.$item['id'], server: ['CONTENT_TYPE' => 'application/json', 'HTTP_X_CSRF_TOKEN' => $token], content: json_encode($update));
            self::assertResponseIsSuccessful();
            $client->request('POST', '/admin/api/media/'.$item['id'], server: ['CONTENT_TYPE' => 'application/json', 'HTTP_X_CSRF_TOKEN' => $token], content: json_encode($update));
            self::assertResponseStatusCodeSame(409);
            $client->request('GET', $item['variants'][0]['src']);
            self::assertResponseIsSuccessful();
            self::assertResponseHeaderSame('Content-Type', 'image/webp');
            self::assertResponseHeaderSame('X-Content-Type-Options', 'nosniff');
            $client->request('GET', '/media/'.$item['id'].'/999.webp');
            self::assertResponseStatusCodeSame(404);
            $update['version'] = 2;
            $update['archived'] = false;
            $client->request('POST', '/admin/api/media/'.$item['id'], server: ['CONTENT_TYPE' => 'application/json', 'HTTP_X_CSRF_TOKEN' => $token], content: json_encode($update));
            self::assertResponseIsSuccessful();
            self::assertSame(0, (int) $this->db->fetchOne('SELECT archived FROM media'));
        } finally {
            unlink($path);
        }
    }

    public function testPasswordUpgradeRefreshesTheSessionUser(): void
    {
        $provider = new UserProvider($this->db);
        $user = $provider->loadUserByIdentifier('admin');
        $hash = password_hash('Fixture-only-password', PASSWORD_BCRYPT, ['cost' => 5]);
        $provider->upgradePassword($user, $hash);
        self::assertSame($hash, $user->getPassword());
        self::assertSame($hash, $provider->refreshUser($user)->getPassword());
    }

    public function testChangedRolesInvalidateAnExistingSession(): void
    {
        $client = $this->login();
        $this->db->executeStatement('UPDATE cms_user SET roles = ? WHERE username = ?', ['["ROLE_EDITOR"]', 'admin']);
        $client->request('GET', '/admin/api/pages/p1');
        self::assertResponseRedirects('http://localhost/admin/login');
    }

    public function testLoginCsrfAndPasswordAreRequired(): void
    {
        $client = self::createClient();
        $client->request('POST', '/admin/login', ['_username' => 'admin', '_password' => 'Fixture-only-password']);
        self::assertResponseRedirects('/admin/login');
        $crawler = $client->followRedirect();
        self::assertSelectorExists('[role="alert"]');
        $client->submit($crawler->selectButton('Anmelden')->form(['_username' => 'admin', '_password' => 'wrong']));
        self::assertResponseRedirects('/admin/login');
        $client->request('GET', '/admin');
        self::assertResponseRedirects('http://localhost/admin/login');
    }

    public function testCsrfProtectsEveryPostAndMalformedBodyIsRejected(): void
    {
        $client = $this->login();
        $data = $this->data($client);
        foreach (['draft', 'publish', 'preview'] as $action) {
            $this->post($client, $action, ['document' => $data['document'], 'expectedVersion' => $data['version'], 'revisionId' => $data['revisionId']], 'invalid');
            self::assertResponseStatusCodeSame(403);
        }
        $this->post($client, 'draft', ['document' => $data['document'], 'expectedVersion' => '2'], $data['csrfToken']);
        self::assertResponseStatusCodeSame(422);
        $client->request('POST', '/admin/api/pages/p1/draft', server: ['CONTENT_TYPE' => 'application/json', 'HTTP_X_CSRF_TOKEN' => $data['csrfToken']], content: '{bad-json');
        self::assertResponseStatusCodeSame(422);
        self::assertSame(1, (int) $this->db->fetchOne('SELECT COUNT(*) FROM revision'));
    }

    public function testEditorCanSaveButCannotPublish(): void
    {
        $client = $this->login('editor');
        $data = $this->data($client);
        $data['document']['title'] = 'Private draft';
        $this->post($client, 'draft', ['document' => $data['document'], 'expectedVersion' => 2], $data['csrfToken']);
        self::assertResponseIsSuccessful();
        $saved = json_decode($client->getResponse()->getContent(), true);
        $this->post($client, 'publish', ['expectedVersion' => 3, 'revisionId' => $saved['revisionId']], $data['csrfToken']);
        self::assertResponseStatusCodeSame(403);
        $client->request('GET', '/');
        self::assertStringNotContainsString('Private draft', $client->getResponse()->getContent());
    }

    public function testPreviewSaveConflictAndPublishRoundTrip(): void
    {
        $client = $this->login();
        $data = $this->data($client);
        $document = $data['document'];
        $document['blocks'][0]['children'][1]['props']['text'] = 'An edited heading';
        $this->post($client, 'preview', ['document' => $document], $data['csrfToken']);
        self::assertResponseIsSuccessful();
        self::assertStringContainsString('An edited heading', $client->getResponse()->getContent());
        self::assertStringContainsString('no-store', $client->getResponse()->headers->get('Cache-Control'));
        self::assertStringContainsString('noindex', $client->getResponse()->headers->get('X-Robots-Tag'));
        $this->post($client, 'draft', ['document' => $document, 'expectedVersion' => 2], $data['csrfToken']);
        self::assertResponseIsSuccessful();
        $saved = json_decode($client->getResponse()->getContent(), true);
        self::assertSame($document, $saved['document']);
        self::assertSame(3, $saved['version']);
        $this->post($client, 'draft', ['document' => $data['document'], 'expectedVersion' => 2], $data['csrfToken']);
        self::assertResponseStatusCodeSame(409);
        $this->post($client, 'publish', ['expectedVersion' => 3, 'revisionId' => $data['revisionId']], $data['csrfToken']);
        self::assertResponseStatusCodeSame(409);
        $this->post($client, 'publish', ['expectedVersion' => 3, 'revisionId' => $saved['revisionId']], $data['csrfToken']);
        self::assertResponseIsSuccessful();
        $client->request('GET', '/');
        self::assertStringContainsString('An edited heading', $client->getResponse()->getContent());
        self::assertStringNotContainsString('editor.js', $client->getResponse()->getContent());
        self::assertFalse($client->getResponse()->headers->has('Set-Cookie'));
    }

    public function testLogoutInvalidatesSessionAndNeedsCsrf(): void
    {
        $client = $this->login();
        $client->request('POST', '/admin/logout', ['_csrf_token' => 'wrong']);
        self::assertResponseStatusCodeSame(403);
        $crawler = $client->request('GET', '/admin');
        $client->submit($crawler->selectButton('Abmelden')->form());
        self::assertResponseRedirects('/admin/login');
        $client->request('GET', '/admin');
        self::assertResponseRedirects('http://localhost/admin/login');
    }
}