<?php

/**
 * Kunena Component
 *
 * @package         Kunena.Site
 * @subpackage      Controllers
 *
 * @copyright       Copyright (C) 2008 - 2026 Kunena Team. All rights reserved.
 * @license         https://www.gnu.org/copyleft/gpl.html GNU/GPL
 * @link            https://www.kunena.org
 **/

namespace Kunena\Forum\Site\Controllers;

\defined('_JEXEC') or die();

use Exception;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Menu\AbstractMenu;
use Kunena\Forum\Libraries\Controller\KunenaController;
use Kunena\Forum\Libraries\Error\KunenaError;
use Kunena\Forum\Libraries\Exception\KunenaException;
use Kunena\Forum\Libraries\Factory\KunenaFactory;
use Kunena\Forum\Libraries\Route\KunenaRoute;

/**
 * Kunena Home Controller
 *
 * @since   Kunena 2.0
 */
class HomeController extends KunenaController
{
    /**
     * @var     integer
     * @since   Kunena 6.0
     */
    public $home = 1;

    protected $default_view = 'Kunena\Forum\Site\Controller\Display';

    protected $prefix = 'site';

    /**
     * @param   bool  $cachable   catchable
     * @param   bool  $urlparams  urlparams
     *
     * @return \Kunena\Forum\Libraries\Controller\KunenaController
     *
     * @since   Kunena 1.0
     *
     * @throws \Kunena\Forum\Libraries\Exception\KunenaException
     */
    public function display($cachable = false, $urlparams = false): KunenaController
    {
        $menu = $this->app->getMenu();
        $home = $menu->getActive();

        if (!$home) {
            $this->app->getInput()->get('view', 'category');
            $this->app->getInput()->get('layout', 'list');
        } else {
            // Find default menu item
            $default = $this->_getDefaultMenuItem($menu, $home);

            if (!$default || $default->id == $home->id) {
                // There is no default menu item, use category view instead
                $default = $menu->getItem(KunenaRoute::getItemID("index.php?option=com_kunena&view=category&layout=list"));

                if ($default) {
                    $default = clone $default;
                    $defhome = KunenaRoute::getHome($default);

                    if (!$defhome || $defhome->id != $home->id) {
                        $default = clone $home;
                    }

                    $default->query['view']   = 'category';
                    $default->query['layout'] = 'list';
                }
            }

            if (!$default) {
                throw new KunenaException(Text::_('COM_KUNENA_NO_ACCESS'), 500);
            }

            // Add query variables from shown menu item
            foreach ($default->query as $var => $value) {
                $this->app->getInput()->get($var, $value);
            }

            // Remove query variables coming from the home menu item
            $this->app->getInput()->set('defaultmenu', null);

            // Set active menu item to point the real page
            $menu->setActive($default->id);
        }

        // Reset our router
        KunenaRoute::initialize();

        // Run display task from our new controller
        $controller = KunenaController::getInstance();
        $controller->execute('display');

        // Set redirect and message
        $this->setRedirect($controller->getRedirect(), $controller->getMessage(), $controller->getMessageType());
    }

    /**
     * @param   AbstractMenu  $menu     Joomla menu.
     * @param   object        $active   Active menu item.
     * @param   array         $visited  Already visited menu items.
     *
     * @return  mixed
     *
     * @since   Kunena 6.0
     *
     * @throws  Exception
     */
    protected function _getDefaultMenuItem(AbstractMenu $menu, $active, $visited = [])
    {
        KunenaFactory::loadLanguage('com_kunena.controllers');

        if (empty($active->query['defaultmenu']) || $active->id == $active->query['defaultmenu']) {
            // There is no highlighted menu item
            return false;
        }

        $item = $menu->getItem($active->query['defaultmenu']);

        if (!$item) {
            // Menu item points to nowhere, abort
            KunenaError::warning(Text::sprintf('COM_KUNENA_WARNING_MENU_NOT_EXISTS'), 'menu');

            return false;
        } elseif (isset($visited[$item->id])) {
            // Menu loop detected, abort
            KunenaError::warning(Text::sprintf('COM_KUNENA_WARNING_MENU_LOOP'), 'menu');

            return false;
        } elseif (empty($item->component) || $item->component != 'com_kunena' || !isset($item->query['view'])) {
            // Menu item doesn't point to Kunena, abort
            KunenaError::warning(Text::sprintf('COM_KUNENA_WARNING_MENU_NOT_KUNENA'), 'menu');

            return false;
        } elseif ($item->query['view'] == 'home') {
            // Menu item is pointing to another Home Page, try to find default menu item from there
            $visited[$item->id] = 1;
            $item               = $this->_getDefaultMenuItem($menu, $item->query['defaultmenu'], $visited);
        }

        return $item;
    }
}