<?php
namespace Misuzu;

use Misuzu\Template;
use Misuzu\Config\IConfig;
use Misuzu\GeoIP\GeoIPHelper;
use Misuzu\SharpChat\SharpChatRoutes;
use Misuzu\Users\Users;
use Index\Data\IDbConnection;
use Index\Data\Migration\IDbMigrationRepo;
use Index\Data\Migration\DbMigrationManager;
use Index\Data\Migration\FsDbMigrationRepo;
use Index\Http\HttpFx;
use Index\Http\HttpRequest;
use Index\Routing\Router;

// this class should function as the root for everything going forward
// no more magical static classes that are just kind of assumed to exist
// it currently looks Pretty Messy, but most everything else will be holding instances of other classes
class MisuzuContext {
    private IDbConnection $dbConn;
    private IConfig $config;
    private Users $users;
    private HttpFx $router;
    private ?GeoIPHelper $geoIP = null;

    public function __construct(IDbConnection $dbConn, IConfig $config) {
        $this->dbConn = $dbConn;
        $this->config = $config;
        $this->users = new Users($this->dbConn);
    }

    public function getDbQueryCount(): int {
        $result = $this->dbConn->query('SHOW SESSION STATUS LIKE "Questions"');
        return $result->next() ? $result->getInteger(0) : 0;
    }

    public function createMigrationManager(): DbMigrationManager {
        return new DbMigrationManager($this->dbConn, 'msz_' . DbMigrationManager::DEFAULT_TABLE);
    }

    public function createMigrationRepo(): IDbMigrationRepo {
        return new FsDbMigrationRepo(MSZ_MIGRATIONS);
    }

    public function getConfig(): IConfig {
        return $this->config;
    }

    public function getRouter(): Router {
        return $this->router->getRouter();
    }

    /*public function getUsers(): Users {
        return $this->users;
    }*/

    public function getGeoIP(): GeoIPHelper {
        if($this->geoIP === null)
            return $this->geoIP = new GeoIPHelper($this->config->scopeTo('geoip'));
        return $this->geoIP;
    }

    public function setUpHttp(bool $legacy = false): void {
        $this->router = new HttpFx;
        $this->router->use('/', function($response) {
            $response->setPoweredBy('Misuzu');
        });

        $this->registerErrorPages();

        if($legacy)
            $this->registerLegacyRedirects();
        else
            $this->registerHttpRoutes();
    }

    public function dispatchHttp(?HttpRequest $request = null): void {
        $this->router->dispatch($request);
    }

    private function registerErrorPages(): void {
        $this->router->addErrorHandler(400, function($response) {
            $response->setContent(Template::renderRaw('errors.400'));
        });
        $this->router->addErrorHandler(403, function($response) {
            $response->setContent(Template::renderRaw('errors.403'));
        });
        $this->router->addErrorHandler(404, function($response) {
            $response->setContent(Template::renderRaw('errors.404'));
        });
        $this->router->addErrorHandler(500, function($response) {
            $response->setContent(file_get_contents(MSZ_TEMPLATES . '/500.html'));
        });
        $this->router->addErrorHandler(503, function($response) {
            $response->setContent(file_get_contents(MSZ_TEMPLATES . '/503.html'));
        });
    }

    private function registerHttpRoutes(): void {
        function msz_compat_handler(string $className, string $method) {
            return function(...$args) use ($className, $method) {
                $className = "\\Misuzu\\Http\\Handlers\\{$className}Handler";
                return (new $className)->{$method}(...$args);
            };
        }

        $this->router->get('/', msz_compat_handler('Home', 'index'));

        $this->router->get('/assets/:filename', msz_compat_handler('Assets', 'serveComponent'));
        $this->router->get('/assets/avatar/:filename', msz_compat_handler('Assets', 'serveAvatar'));
        $this->router->get('/assets/profile-background/:filename', msz_compat_handler('Assets', 'serveProfileBackground'));

        $this->router->get('/info', msz_compat_handler('Info', 'index'));
        $this->router->get('/info/:name', msz_compat_handler('Info', 'page'));
        $this->router->get('/info/:project/:name', msz_compat_handler('Info', 'page'));

        $this->router->get('/changelog', msz_compat_handler('Changelog', 'index'));
        $this->router->get('/changelog.rss', msz_compat_handler('Changelog', 'feedRss'));
        $this->router->get('/changelog.atom', msz_compat_handler('Changelog', 'feedAtom'));
        $this->router->get('/changelog/change/:id', msz_compat_handler('Changelog', 'change'));

        $this->router->get('/news', msz_compat_handler('News', 'index'));
        $this->router->get('/news.rss', msz_compat_handler('News', 'feedIndexRss'));
        $this->router->get('/news.atom', msz_compat_handler('News', 'feedIndexAtom'));
        $this->router->get('/news/:category', msz_compat_handler('News', 'viewCategory'));
        $this->router->get('/news/post/:id', msz_compat_handler('News', 'viewPost'));

        $this->router->get('/forum/mark-as-read', msz_compat_handler('Forum', 'markAsReadGET'));
        $this->router->post('/forum/mark-as-read', msz_compat_handler('Forum', 'markAsReadPOST'));

        new SharpChatRoutes($this->router, $this->config->scopeTo('sockChat'));
    }

    private function registerLegacyRedirects(): void {
        $this->router->get('/index.php', function($response) {
            $response->redirect(url('index'), true);
        });

        $this->router->get('/info.php', function($response) {
            $response->redirect(url('info'), true);
        });

        $this->router->get('/settings.php', function($response) {
            $response->redirect(url('settings-index'), true);
        });

        $this->router->get('/changelog.php', function($response, $request) {
            $changeId = $request->getParam('c', FILTER_SANITIZE_NUMBER_INT);
            if($changeId) {
                $response->redirect(url('changelog-change', ['change' => $changeId]), true);
                return;
            }

            $response->redirect(url('changelog-index', [
                'date' => $request->getParam('d'),
                'user' => $request->getParam('u', FILTER_SANITIZE_NUMBER_INT),
            ]), true);
        });

        $infoRedirect = function($response, $request, string ...$parts) {
            $response->redirect(url('info', ['title' => implode('/', $parts)]), true);
        };
        $this->router->get('/info.php/:name', $infoRedirect);
        $this->router->get('/info.php/:project/:name', $infoRedirect);

        $this->router->get('/auth.php', function($response, $request) {
            $response->redirect(url([
                'logout' => 'auth-logout',
                'reset' => 'auth-reset',
                'forgot' => 'auth-forgot',
                'register' => 'auth-register',
            ][$request->getParam('m')] ?? 'auth-login'), true);
        });

        $this->router->get('/news.php', function($response, $request) {
            $postId = $request->getParam('n', FILTER_SANITIZE_NUMBER_INT) ?? $request->getParam('p', FILTER_SANITIZE_NUMBER_INT);

            if($postId > 0)
                $location = url('news-post', ['post' => $postId]);
            else {
                $catId = $request->getParam('c', FILTER_SANITIZE_NUMBER_INT);
                $pageId = $request->getParam('page', FILTER_SANITIZE_NUMBER_INT);
                $location = url($catId > 0 ? 'news-category' : 'news-index', ['category' => $catId, 'page' => $pageId]);
            }

            $response->redirect($location, true);
        });

        $this->router->get('/news.php/rss', function($response, $request) {
            $catId = $request->getParam('c', FILTER_SANITIZE_NUMBER_INT);
            $location = url($catId > 0 ? 'news-category-feed-rss' : 'news-feed-rss', ['category' => $catId]);
            $response->redirect($location, true);
        });

        $this->router->get('/news.php/atom', function($response, $request) {
            $catId = $request->getParam('c', FILTER_SANITIZE_NUMBER_INT);
            $location = url($catId > 0 ? 'news-category-feed-atom' : 'news-feed-atom', ['category' => $catId]);
            $response->redirect($location, true);
        });

        $this->router->get('/news/index.php', function($response) {
            $response->redirect(url('news-index', [
                'page' => $request->getParam('page', FILTER_SANITIZE_NUMBER_INT),
            ]), true);
        });

        $this->router->get('/news/category.php', function($response, $request) {
            $response->redirect(url('news-category', [
                'category' => $request->getParam('c', FILTER_SANITIZE_NUMBER_INT),
                'page' => $request->getParam('p', FILTER_SANITIZE_NUMBER_INT),
            ]), true);
        });

        $this->router->get('/news/post.php', function($response, $request) {
            $response->redirect(url('news-post', [
                'post' => $request->getParam('p', FILTER_SANITIZE_NUMBER_INT),
            ]), true);
        });

        $this->router->get('/news/feed.php', function() {
            return 400;
        });

        $this->router->get('/news/feed.php/rss', function($response, $request) {
            $response->redirect(url(
                $catId > 0 ? 'news-category-feed-rss' : 'news-feed-rss',
                ['category' => $request->getParam('c', FILTER_SANITIZE_NUMBER_INT)]
            ), true);
        });

        $this->router->get('/news/feed.php/atom', function($response, $request) {
            $response->redirect(url(
                $catId > 0 ? 'news-category-feed-atom' : 'news-feed-atom',
                ['category' => $request->getParam('c', FILTER_SANITIZE_NUMBER_INT)]
            ), true);
        });

        $this->router->get('/user-assets.php', function($response, $request) {
            return (new \Misuzu\Http\Handlers\AssetsHandler)->serveLegacy($response, $request);
        });
    }
}