<?php

namespace App\Controller;

use App\Ops\Scheduler;
use App\Plugin\PluginRegistry;
use App\Plugin\PluginRuntime;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;

/**
 * Der Bildschirm „Plugins“: was im Ordner liegt, was davon eingeschaltet ist, der Schalter, die
 * Einstellungen eines Plugins.
 */
final class PluginAdminController extends AbstractController
{
    public function __construct(private PluginRegistry $plugins, private PluginRuntime $runtime, private Scheduler $scheduler)
    {
    }

    #[Route('/%kant.admin_path%/plugins', name: 'admin_plugins', methods: ['GET'])]
    public function index(): Response
    {
        // Ein Plugin bringt Code auf die Website - das schaltet nur ein Administrator.
        $this->denyAccessUnlessGranted('ROLE_ADMIN');

        $admin = [];
        foreach ($this->plugins->all() as $name => $plugin) {
            $admin[$name] = $this->runtime->admin($name);
        }

        return $this->render('admin/plugins.html.twig', ['plugins' => $this->plugins->all(), 'directory' => $this->plugins->directory(), 'admin' => $admin, 'runtimeErrors' => $this->runtime->errors()]);
    }

    #[Route('/%kant.admin_path%/plugins/{name}/{state}', name: 'admin_plugin_toggle', requirements: ['name' => '[a-z][a-z0-9]{1,30}', 'state' => 'an|aus'], methods: ['POST'])]
    public function toggle(Request $request, string $name, string $state): Response
    {
        $this->denyAccessUnlessGranted('ROLE_ADMIN');
        if (!$this->isCsrfTokenValid('plugins', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        try {
            if ('an' === $state) {
                $this->runtime->activate($name);
                $this->scheduler->pluginsChanged();

                return $this->back(sprintf('„%s“ ist eingeschaltet. Seine Bausteine stehen jetzt im Editor unter „Erweiterungen“.', $this->plugins->all()[$name]['title']), 'success');
            }
            $this->runtime->deactivate($name);
            $this->scheduler->pluginsChanged();

            return $this->back(sprintf('„%s“ ist ausgeschaltet. Seine Bausteine bleiben in den Seiten gespeichert, werden aber nicht mehr dargestellt.', $this->plugins->all()[$name]['title']), 'success');
        } catch (\InvalidArgumentException $e) {
            return $this->back($e->getMessage());
        }
    }

    #[Route('/%kant.admin_path%/plugins/{name}/einstellungen', name: 'admin_plugin_settings', requirements: ['name' => '[a-z][a-z0-9]{1,30}'], methods: ['POST'])]
    public function settings(Request $request, string $name): Response
    {
        $this->denyAccessUnlessGranted('ROLE_ADMIN');
        if (!$this->isCsrfTokenValid('plugins', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        try {
            $this->plugins->saveSettings($name, $request->request->all('settings'));
        } catch (\InvalidArgumentException $e) {
            return $this->back($e->getMessage());
        }

        return $this->back(sprintf('Die Einstellungen von „%s“ wurden gespeichert.', $this->plugins->all()[$name]['title']), 'success');
    }

    #[Route('/%kant.admin_path%/plugins/{name}/seite/{key}', name: 'admin_plugin_page', requirements: ['name' => '[a-z][a-z0-9]{1,30}', 'key' => '[a-z][a-z0-9-]{0,40}'], methods: ['GET'])]
    public function page(string $name, string $key): Response
    {
        $this->denyAccessUnlessGranted('ROLE_ADMIN');
        $admin = $this->runtime->admin($name);
        $page = $admin['pages'][$key] ?? throw $this->createNotFoundException();

        return $this->render('admin/plugin-page.html.twig', ['plugin' => $this->plugins->all()[$name], 'page' => $page, 'actions' => $admin['actions'], 'data' => ($page['callback'])()]);
    }

    #[Route('/%kant.admin_path%/plugins/{name}/aktion/{key}', name: 'admin_plugin_action', requirements: ['name' => '[a-z][a-z0-9]{1,30}', 'key' => '[a-z][a-z0-9-]{0,40}'], methods: ['POST'])]
    public function action(Request $request, string $name, string $key): Response
    {
        $this->denyAccessUnlessGranted('ROLE_ADMIN');
        if (!$this->isCsrfTokenValid('plugins', $request->request->getString('_csrf_token'))) {
            return $this->back('Deine Sitzung ist abgelaufen. Bitte melde dich erneut an.');
        }
        $admin = $this->runtime->admin($name);
        $action = $admin['actions'][$key] ?? throw $this->createNotFoundException();
        try {
            if (is_string($action['handler'])) {
                $result = $this->scheduler->runNow(PluginRuntime::taskName($name, $action['handler']));
                [$type, $message] = null === $result ? ['error', 'Die Aufgabe läuft gerade schon.'] : ['ok' === $result['status'] ? 'success' : 'error', $result['message']];
            } else {
                [$type, $message] = ['success', (string) ($action['handler'])()];
            }
        } catch (\Throwable $e) {
            [$type, $message] = ['error', $e->getMessage()];
        }
        $this->addFlash($type, $message);
        $back = $request->request->getString('zurueck');

        return isset($admin['pages'][$back]) ? $this->redirectToRoute('admin_plugin_page', ['name' => $name, 'key' => $back]) : $this->redirectToRoute('admin_plugins');
    }

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

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