<?php

namespace App\Tests;

use App\Content\DemoContent;
use App\Content\DocumentValidator;
use App\Content\FormRepository;
use App\Content\MediaLibrary;
use App\Content\PageRepository;
use App\Content\SiteSettings;
use App\Infrastructure\ConnectionFactory;
use App\Ops\Backup;
use App\Ops\CommandRunner;
use App\Ops\SitePackage;
use App\Ops\Updater;
use Doctrine\DBAL\Connection;
use PHPUnit\Framework\TestCase;

/**
 * Inhaltspakete zwischen zwei Installationen (ADR 118).
 *
 * Der Anlass war das Passwort, das sich nach jedem Hochladen einer Datenbank änderte. Deshalb steht
 * der Test vorn, der das festhält: Inhalte kommen, Konten, Anfragen und Zugangsdaten zu Diensten
 * bleiben - außer man nimmt die Konten ausdrücklich mit.
 */
final class SitePackageTest extends TestCase
{
    /** @var array<string, array{root: string, db: Connection, package: SitePackage}> */
    private array $sites = [];

    protected function setUp(): void
    {
        foreach (['quelle', 'ziel'] as $name) {
            $root = str_replace('\\', '/', sys_get_temp_dir()).'/kant-paket-'.$name.'-'.bin2hex(random_bytes(5));
            mkdir($root.'/var/media', 0o775, true);
            file_put_contents($root.'/VERSION', "1.32.0\n");
            $url = 'sqlite:///'.$root.'/var/cms.db';
            $db = ConnectionFactory::create($url);
            TestSchema::build($db);
            $db->insert('website', ['id' => 'default', 'name' => 'Website '.$name, 'default_locale' => 'de', 'theme' => '{}', 'settings' => json_encode(['turnstileSecret' => 'geheim-'.$name, 'turnstileSiteKey' => 'schluessel-'.$name])]);
            $pages = new PageRepository($db, new DocumentValidator(), new SiteSettings($db, new MediaLibrary($db, $root.'/var/media')));
            $pages->createPage('ziel' === $name ? 'alte-seite' : 'neue-seite', null, 'page', DemoContent::starter('Seite der '.$name));
            (new FormRepository($db))->save('anfrage', 'Anfrage', [['name' => 'email', 'type' => 'email', 'label' => 'E-Mail', 'required' => true]], ['recipient' => 'info@example.org'], 0);
            $db->insert('cms_user', ['id' => 'u-'.$name, 'username' => $name, 'password_hash' => 'hash-'.$name, 'roles' => '["ROLE_ADMIN"]']);
            file_put_contents($root.'/var/media/'.str_repeat('ziel' === $name ? 'b' : 'a', 32).'-480.webp', 'bild '.$name);
            $runner = new CommandRunner();
            $this->sites[$name] = ['root' => $root, 'db' => $db, 'package' => new SitePackage($db, new DocumentValidator(), new Backup($root, $url, $root.'/var/media', $db, $runner), new Updater($root, $url, $runner, $db), $root, $root.'/var/media')];
        }
        // Eine Anfrage, die es nur auf der Zielwebsite gibt - sie muss den Import überstehen.
        $ziel = $this->sites['ziel']['db'];
        $ziel->insert('form_submission', ['id' => 's1', 'form_id' => $ziel->fetchOne('SELECT id FROM form'), 'data' => '{}', 'sender_hash' => 'x', 'created_at' => '2026-10-12 10:00:00', 'delivered' => 0]);
    }

    protected function tearDown(): void
    {
        foreach ($this->sites as $site) {
            $site['db']->close();
        }
        gc_collect_cycles();
        foreach ($this->sites as $site) {
            self::remove($site['root']);
        }
    }

    public function testImportReplacesContentAndKeepsAccountsSubmissionsAndServiceKeys(): void
    {
        $file = $this->sites['quelle']['package']->export();
        $result = $this->sites['ziel']['package']->import($file);
        self::assertTrue($result['ok'], json_encode($result['steps'], JSON_UNESCAPED_UNICODE));

        $db = $this->sites['ziel']['db'];
        self::assertSame(['neue-seite'], $db->fetchFirstColumn('SELECT path FROM page'));
        self::assertSame('Website quelle', $db->fetchOne('SELECT name FROM website'));
        // Das Konto der Zielwebsite bleibt - genau der Anlass dieses Imports.
        self::assertSame([['username' => 'ziel', 'password_hash' => 'hash-ziel']], $db->fetchAllAssociative('SELECT username, password_hash FROM cms_user'));
        // Die Anfrage hängt jetzt am Formular aus dem Paket (gleiche Adresse, neue Kennung).
        self::assertSame($db->fetchOne('SELECT id FROM form'), $db->fetchOne('SELECT form_id FROM form_submission WHERE id = ?', ['s1']));
        self::assertSame($this->sites['quelle']['db']->fetchOne('SELECT id FROM form'), $db->fetchOne('SELECT id FROM form'));
        // Zugangsdaten zu Diensten bleiben, wo sie waren - und standen auch nicht im Paket.
        $settings = json_decode((string) $db->fetchOne('SELECT settings FROM website'), true);
        self::assertSame(['geheim-ziel', 'schluessel-ziel'], [$settings['turnstileSecret'], $settings['turnstileSiteKey']]);
        $zip = new \ZipArchive();
        $zip->open($file);
        self::assertStringNotContainsString('geheim-quelle', (string) $zip->getFromName(SitePackage::DATA));
        self::assertStringNotContainsString('hash-quelle', (string) $zip->getFromName(SitePackage::DATA), 'Ohne Häkchen keine Konten im Paket.');
        $zip->close();
        // Der Medienordner ist der des Pakets; der vorige Stand liegt in der Sicherung.
        self::assertSame([str_repeat('a', 32).'-480.webp'], array_values(array_diff(scandir($this->sites['ziel']['root'].'/var/media'), ['.', '..'])));
        self::assertNotEmpty(glob($this->sites['ziel']['root'].'/var/backups/sicherung-*'), 'Vor dem Import wird gesichert.');
        self::assertFileDoesNotExist($this->sites['ziel']['root'].'/var/maintenance');
    }

    public function testAccountsComeAlongOnlyWhenChosenOnBothSides(): void
    {
        // Paket ohne Konten, Häkchen gesetzt: abgelehnt, nichts geändert.
        $ohne = $this->sites['quelle']['package']->export();
        $result = $this->sites['ziel']['package']->import($ohne, true);
        self::assertFalse($result['ok']);
        self::assertSame(['alte-seite'], $this->sites['ziel']['db']->fetchFirstColumn('SELECT path FROM page'));

        // Paket mit Konten, aber ohne Häkchen beim Import: die Konten bleiben.
        $mit = $this->sites['quelle']['package']->export(true);
        self::assertTrue($this->sites['ziel']['package']->import($mit)['ok']);
        self::assertSame(['ziel'], $this->sites['ziel']['db']->fetchFirstColumn('SELECT username FROM cms_user'));

        // Mit Häkchen: die Konten des Pakets.
        self::assertTrue($this->sites['ziel']['package']->import($mit, true)['ok']);
        self::assertSame([['username' => 'quelle', 'password_hash' => 'hash-quelle']], $this->sites['ziel']['db']->fetchAllAssociative('SELECT username, password_hash FROM cms_user'));
    }

    public function testAPackageFromANewerVersionIsRefused(): void
    {
        file_put_contents($this->sites['quelle']['root'].'/VERSION', "9.0.0\n");
        $result = $this->sites['ziel']['package']->import($this->sites['quelle']['package']->export());
        self::assertFalse($result['ok']);
        self::assertStringContainsString('Erst diese Website aktualisieren', $result['steps'][0]['detail']);
        self::assertSame(['alte-seite'], $this->sites['ziel']['db']->fetchFirstColumn('SELECT path FROM page'));
    }

    /** @return iterable<string, array{callable(\ZipArchive): void, string}> */
    public static function tamperedPackages(): iterable
    {
        yield 'fremde Datei' => [static fn (\ZipArchive $zip) => $zip->addFromString('../../public/hallo.php', '<?php'), 'gehört nicht in ein Inhaltspaket'];
        yield 'Skript als Medium' => [static fn (\ZipArchive $zip) => $zip->addFromString('medien/shell.php', '<?php'), 'gehört nicht in ein Inhaltspaket'];
        yield 'veränderter Inhalt' => [static function (\ZipArchive $zip): void {
            $zip->addFromString(SitePackage::DATA, str_replace('Seite der quelle', 'Untergeschoben', (string) $zip->getFromName(SitePackage::DATA)));
        }, 'Prüfsumme'];
        yield 'fremde Tabelle' => [static function (\ZipArchive $zip): void {
            $data = json_decode((string) $zip->getFromName(SitePackage::DATA), true);
            $data['tabellen']['form_submission'] = [];
            $raw = json_encode($data);
            $manifest = json_decode((string) $zip->getFromName(SitePackage::MANIFEST), true);
            $manifest['sha256'] = hash('sha256', $raw);
            $zip->addFromString(SitePackage::DATA, $raw);
            $zip->addFromString(SitePackage::MANIFEST, json_encode($manifest));
        }, 'gehört nicht in ein Inhaltspaket'];
        yield 'ungültiges Dokument' => [static function (\ZipArchive $zip): void {
            $data = json_decode((string) $zip->getFromName(SitePackage::DATA), true);
            $data['tabellen']['revision'][0]['document'] = json_encode(['schemaVersion' => 1, 'title' => 'x', 'blocks' => [['id' => 'a', 'type' => 'unbekannt']]]);
            $raw = json_encode($data);
            $manifest = json_decode((string) $zip->getFromName(SitePackage::MANIFEST), true);
            $manifest['sha256'] = hash('sha256', $raw);
            $zip->addFromString(SitePackage::DATA, $raw);
            $zip->addFromString(SitePackage::MANIFEST, json_encode($manifest));
        }, ''];
    }

    #[\PHPUnit\Framework\Attributes\DataProvider('tamperedPackages')]
    public function testATamperedPackageChangesNothing(callable $tamper, string $message): void
    {
        $file = $this->sites['quelle']['package']->export();
        $zip = new \ZipArchive();
        $zip->open($file);
        $tamper($zip);
        $zip->close();

        $result = $this->sites['ziel']['package']->import($file);
        self::assertFalse($result['ok']);
        self::assertStringContainsString($message, json_encode($result['steps'], JSON_UNESCAPED_UNICODE));
        self::assertSame(['alte-seite'], $this->sites['ziel']['db']->fetchFirstColumn('SELECT path FROM page'));
        self::assertSame([str_repeat('b', 32).'-480.webp'], array_values(array_diff(scandir($this->sites['ziel']['root'].'/var/media'), ['.', '..'])));
        self::assertFileDoesNotExist($this->sites['ziel']['root'].'/public/hallo.php');
    }

    private static function remove(string $path): void
    {
        if (!is_dir($path)) {
            return;
        }
        foreach (scandir($path) ?: [] as $entry) {
            if ('.' !== $entry && '..' !== $entry) {
                is_dir($path.'/'.$entry) ? self::remove($path.'/'.$entry) : @unlink($path.'/'.$entry);
            }
        }
        @rmdir($path);
    }
}