<?php
/**
 * @package DJ-Catalog2
 * @copyright Copyright (C) DJ-Extensions.com, All rights reserved.
 * @license http://www.gnu.org/licenses GNU/GPL
 * @author url: http://dj-extensions.com
 * @author email contact@dj-extensions.com
 *
 */

defined('_JEXEC') or die;
use Joomla\CMS\Factory;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Application\ApplicationHelper;
use Joomla\CMS\Component\Router\RouterInterface;
use Joomla\CMS\Language\Associations;

require_once(JPATH_ROOT.'/components/com_djcatalog2/helpers/route.php');

function DJCatalog2BuildRoute(&$query)
{
    $segments = array();

    $app		= Factory::getApplication();
    $menu	   = $app->getMenu('site');

    $params = ComponentHelper::getParams( 'com_djcatalog2' );
    $component_views = array('items' => 'items', 'item' => 'item',
        'producer' => 'producer', 'myitems' => 'myitems',
        'itemform' => 'itemform', 'producers' => 'producers',
        'cart'=>'cart', 'orders'=>'orders', 'order'=>'order',
        'checkout'=>'checkout', 'query' => 'query', 'map' => 'map',
        'archived' => 'archived', 'questions' => 'questions', 'question' => 'question',
        'compare' => 'compare', 'orderform' => 'orderform', 'questionform' => 'questionform',
        'addresses' => 'addresses', 'address' => 'address', 'configurable' => 'configurable' , 'wishes' => 'wishes');
    foreach($component_views as $view_name => $seotag) {
        $alias = $params->get('seo_'.$view_name.'_view', $view_name);
        $alias = ApplicationHelper::stringURLSafe($alias);
        if(trim(str_replace('-','',$alias)) != '') {
            $component_views[$view_name] = trim((string)$alias);
        }
    }

    $default_menu = $menu->getDefault();
    $menuItem = null;

    if (empty($query['Itemid'])) {
        //Log::add(' empty Itemid '.print_r($query, true));
        unset($query['Itemid']);
        $menuItem = $menu->getActive();
    } else {
        //Log::add(' NOT empty Itemid '.print_r($query, true));
        $menuItem = $menu->getItem($query['Itemid']);
    }

    //Log::add(' menu Item '.@$menuItem->component.' '.print_r(@$menuItem->query,true).' -----------------------');

    //$option = (empty($menuItem->component)) ? null : $menuItem->component;

    $mOption  = (empty($menuItem->query['option'])) ? null : $menuItem->query['option'];
    $mView  = (empty($menuItem->query['view'])) ? null : $menuItem->query['view'];
    $mCatid = (empty($menuItem->query['cid'])) ? null : (int)$menuItem->query['cid'];
    $mProdCatid = (empty($menuItem->query['pcid'])) ? null : (int)$menuItem->query['pcid'];
    $mProdid   = (empty($menuItem->query['pid'])) ? null : (int)$menuItem->query['pid'];
    $mId	= (empty($menuItem->query['id'])) ? null : (int)$menuItem->query['id'];
    $mLayout = (empty($menuItem->query['layout'])) ? null : $menuItem->query['layout'];

    $view = !empty($query['view']) ? $query['view'] : null;
    $cid = !empty($query['cid']) ? $query['cid'] : null;
    $pcid = !empty($query['pcid']) ? $query['pcid'] : null;
    $pid = !empty($query['pid']) ? $query['pid'] : null;
    $id = !empty($query['id']) ? $query['id'] : null;
    $layout = !empty($query['layout']) ? $query['layout'] : null;

    $mECatid = (empty($menuItem->query['ecid'])) ? null : (int)$menuItem->query['ecid'];
    $mEId	= (empty($menuItem->query['eid'])) ? null : (int)$menuItem->query['eid'];

    $ecid = !empty($query['ecid']) ? $query['ecid'] : null;
    $eid = !empty($query['eid']) ? $query['eid'] : null;

    $qid = !empty($query['qid']) ? $query['qid'] : null;
    $oid = !empty($query['oid']) ? $query['oid'] : null;

    $task = !empty($query['task']) ? $query['task'] : null;

    // JoomSEF bug workaround
    if (isset($query['start']) && isset($query['limitstart'])) {
        if ((int)$query['limitstart'] != (int)$query['start'] && (int)$query['start'] > 0) {
            // let's make it clear - 'limitstart' has higher priority than 'start' parameter,
            // however ARTIO JoomSEF doesn't seem to respect that.
            $query['start'] = $query['limitstart'];
            unset($query['limitstart']);
        }
    }
    // JoomSEF workaround - end
    //if ($view && $option == 'com_djcatalog2') {
    if ($view) {
        if ($view != $mView || empty($query['Itemid'])) {
            if ($params->get('seo_skip_item_view', 0) == '0') {
                $segments[] = $view;
            } else {
                /*if (
                 !( ($view == 'item' || $view == 'items' || $view == 'archived') && ($mView == 'items' || $mView == 'archived') )
                 ||
                 !( $view == 'producer' && $mView == 'producers' )
                 ) {
                 $segments[] = $view;
                 }*/
                /*if ( (($mView == 'items' || $mView == 'archived') && ($view != 'item')) || ($mView == 'producers' && $view !='producer')  || $mOption != 'com_djcatalog2') {
                 $segments[] = $view;
                 }*/

                if ($mOption != 'com_djcatalog2'
                    || ($view != 'item' && $view != 'producer')
                    || ($view == 'item' && $mView != 'items' && $mView != 'archived')
                    || ($view == 'producer' && $mView != 'producers') ) {
                    $segments[] = $view;
                }

                /*if ( ($view != 'item' && $view != 'producer') || $mOption != 'com_djcatalog2') {
                 $segments[] = $view;
                 }*/
            }
        }
        unset($query['view']);

        $mCountryId = (empty($menuItem->query['cntid'])) ? null : (int)$menuItem->query['cntid'];
        $mStateId   = (empty($menuItem->query['stid'])) ? null : (int)$menuItem->query['stid'];
        $countryid = !empty($query['cntid']) ? $query['cntid'] : null;
        $stateid = !empty($query['stid']) ? $query['stid'] : null;

        if ( $view != 'items' || (isset($query['cntid']) && $query['cntid'] === '') ||  (intval($mCountryId) == intval($countryid))) {
            unset($query['cntid']);
        }
        if ( $view != 'items' || (isset($query['stid']) && $query['stid'] === '') ||  (intval($mStateId) == intval($stateid))) {
            unset($query['stid']);
        }

        if ($view == 'item') {
            // child product URLs
            $parent = isset($query['parent']) ? $query['parent'] : false;

            if ($view == $mView && intval($id) > 0 && intval($id) == $mId) {
                unset($query['id']);
                unset($query['cid']);
            } else if ((($mView == 'items' || $mView == 'archived') || $mView === null) && intval($id) > 0) {
                if (intval($cid) != intval($mCatid)) {
                    //$segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid);
                    $segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid, 'category');
                }
                //$segments[] = DJCatalogHelperRoute::formatAlias($id);
                if ($parent) {
                    $segments[] = DJCatalogHelperRoute::formatAlias($parent, 'item');
                    unset($query['parent']);
                }
                $segments[] = DJCatalogHelperRoute::formatAlias($id, 'item');
                unset($query['id']);
                unset($query['cid']);
            }

            if ($layout && $layout != 'default' && $layout != $mLayout) {

                $segments[] = $layout;
                unset($query['layout']);

                if (($layout == 'preview' || $layout == 'print' || $layout == 'contact') && isset($query['tmpl'])) {
                    unset($query['tmpl']);
                }
            }
        }

        if ($view == 'items' || $view == 'archived') {
            if ($cid === null) {
                $cid = '0';
            }
            if (intval($cid) != intval($mCatid) /*|| $mCatid === null*/) {
                //$segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid);
                $segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid, 'category');
            } else if (@$menuItem->id == $default_menu->id && (int)$cid == 0 && (isset($query['cm']) || isset($query['ind']) || (int)$mProdid != (int)$pid) ) {
                $segments[] = 'all';
            }
            unset($query['cid']);

            if ( (isset($query['pid']) && $query['pid'] === '') ||  (intval($mProdid) == intval($pid) /*&& (intval($mProdid) > 0 || intval($pid) > 0)*/)) {
                unset($query['pid']);
            }
        }

        if ($view == 'producers') {
            if ($pcid === null) {
                $pcid = '0';
            }
            if (intval($pcid) != intval($mProdCatid) /*|| $mCatid === null*/) {
                //$segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid);
                $segments[] = (int)$pcid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($pcid, 'producercategory');
            }
            unset($query['pcid']);
        }

        if ($view == 'producer') {
            if (!($view == $mView && intval($pid) > 0 && intval($pid) == $mProdid) && $mView != 'producer') {
                $segments[] = DJCatalogHelperRoute::formatAlias($pid, 'producer');
            }
            unset($query['pid']);
        }

        if ($view == 'itemform') {
            if (intval($id) > 0) {
                $segments[] = $id;
                unset($query['id']);
            }
        }

        if ($view == 'question') {
            if (intval($qid) > 0) {
                $segments[] = $qid;
                unset($query['qid']);
            }
        }

        if ($view == 'order') {
            if (intval($oid) > 0) {
                $segments[] = $oid;
                unset($query['oid']);
            }
        }

        if ($view == 'orderform') {
            if (intval($id) > 0) {
                $segments[] = $id;
                unset($query['id']);
            }
        }

        if ($view == 'questionform') {
            if (intval($id) > 0) {
                $segments[] = $id;
                unset($query['id']);
            }
        }

        if ($view == 'map') {
            if ($cid === null) {
                $cid = '0';
            }
            if (intval($cid) != intval($mCatid) /*|| $mCatid === null*/) {
                $segments[] = (int)$cid == 0 ? 'all' : DJCatalogHelperRoute::formatAlias($cid);
            } else if (@$menuItem->id == $default_menu->id && (int)$cid == 0 && (int)$mProdid != (int)$pid)  {
                $segments[] = 'all';
            }
            unset($query['cid']);

            if ( (isset($query['pid']) && $query['pid'] === '') ||  (intval($mProdid) == intval($pid) /*&& (intval($mProdid) > 0 || intval($pid) > 0)*/)) {
                unset($query['pid']);
            }
        }

        if ($view == 'cart') {
            if ($layout && $layout != 'default' /*&& $layout != 'onestep'*/ && $layout != $mLayout) {
                $segments[] = $layout;
            }
            if (isset($query['layout'])) {
                unset($query['layout']);
            }

            if ($layout == 'onestep') {
                if (isset($query['type'])) {
                    $segments[] = $query['type'];
                    unset($query['type']);
                }
            }
        }
    }

    if (!empty($segments[0]) && array_key_exists($segments[0], $component_views)) {
        $segments[0] = $component_views[$segments[0]];
    }

    return $segments;
}

function DJCatalog2ParseRoute(&$segments) {
    $app	= Factory::getApplication();
    $menu	= $app->getMenu();
    $activemenu = $menu->getActive();
    $db = Factory::getDBO();
    $params = ComponentHelper::getParams( 'com_djcatalog2' );
    $advanced = (int)$params->get('seo_advanced', 0);

    $catalogViews = array('item', 'items', 'producer', 'itemform', 'myitems', 'producers', 'cart', 'checkout', 'orders', 'order', 'query', 'map', 'archived', 'questions', 'question', 'compare', 'configurable', 'orderform', 'questionform', 'addresses', 'address', 'wishes');

    $component_views = array('items' => 'items', 'item' => 'item',
        'producer' => 'producer', 'myitems' => 'myitems',
        'itemform' => 'itemform', 'producers' => 'producers',
        'cart'=>'cart', 'orders'=>'orders', 'order'=>'order',
        'checkout'=>'checkout', 'query'=>'query', 'map' => 'map',
        'archived' => 'archived', 'questions' => 'questions', 'question' => 'question', 'compare' => 'compare', 'orderform' => 'orderform', 'questionform' => 'questionform', 'addresses' => 'addresses', 'address' => 'address', 'configurable' => 'configurable', 'wishes' => 'wishes');

    foreach($component_views as $view_name => $seotag) {
        $view_alias = $params->get('seo_'.$view_name.'_view', $view_name);
        $view_alias = ApplicationHelper::stringURLSafe(trim((string)$view_alias));
        if (count($segments)) {
            if ($segments[0] == $view_alias || str_replace(':', '-', $segments[0]) == $view_alias) {
                $segments[0] = $view_name;
                break;
            }
        }
    }
    $query=array();

    if (!empty($activemenu) && is_array($activemenu->query)) {
        foreach($activemenu->query as $k=>$v) {
            $query[$k] = $v;
        }
    }

    if (count($segments)) {
        if (!in_array($segments[0], $catalogViews)) {
            if ($activemenu) {
                $temp=array();
                $temp[0] = $activemenu->query['view'];
                switch ($temp[0]) {
                    case 'item' : {
                        $temp[1] = @$activemenu->query['id'];
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'items' :
                    case 'archived': {
                        $temp[1] = @$activemenu->query['cid'];

                        if (count($segments) == 1) {
                            if ($segments[0] == 'all') {
                                $temp[0] = 'items';
                                $temp[1] = 0;
                            } else {
                                $tempQuery = is_array($activemenu) && isset($activemenu->query) ? $activemenu->query : array();
                                $tempSegment = DJCatalogHelperRoute::parseAlias($segments[0], 'category', $tempQuery);
                                if ($advanced) {
                                    if ($tempSegment) {
                                        $temp[1] = $segments[0];
                                    } else {
                                        $temp[0] = 'item';
                                    }
                                } else {
                                    $parts = explode(':', $tempSegment, 2);
                                    $id = $parts[0];
                                    $alias = isset($parts[1]) ? $parts[1] : null;
                                    if ((int)$id > 0) {
                                        $user	= Factory::getUser();
                                        $groups	= $user->getAuthorisedViewLevels();
                                        $categories = Djc2Categories::getInstance(array('state'=>'1', 'access' => $groups));
                                        $category = $categories->get((int)$id);
                                        if (!empty($category) && ($category->alias == $alias || empty($alias))) {
                                            $temp[1] = $segments[0];
                                        } else {
                                            $temp[0] = 'item';
                                        }
                                    } else if (!$alias || ($id == 0 && strpos($id, $tempSegment) !== 0)) {
                                        // this should always result in 404
                                        $temp[0] = 'item';
                                        $temp[1] = 0;
                                    }
                                }
                            }
                        } else {
                            $temp[0] = 'item';
                        }

                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'producer' : {
                        $temp[1] = @$activemenu->query['pid'];
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'myitems' : {
                        //$temp[1] = @$activemenu->query['id'];
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'producers' : {
                        $temp[1] = @$activemenu->query['pcid'];

                        if (count($segments) == 1) {
                            if ($segments[0] == 'all') {
                                $temp[0] = 'producers';
                                $temp[1] = 0;
                            } else {
                                $tempQuery = is_array($activemenu) && isset($activemenu->query) ? $activemenu->query : array();
                                $tempSegment = DJCatalogHelperRoute::parseAlias($segments[0], 'producercategory', $tempQuery);
                                if ($advanced) {
                                    if ($tempSegment) {
                                        $temp[1] = $segments[0];
                                    } else {
                                        $temp[0] = 'producer';
                                    }
                                } else {
                                    $parts = explode(':', $tempSegment, 2);
                                    $id = $parts[0];
                                    $alias = isset($parts[1]) ? $parts[1] : null;
                                    if ((int)$id > 0) {
                                        $user	= Factory::getUser();
                                        $groups	= $user->getAuthorisedViewLevels();
                                        $categories = Djc2ProducerCategories::getInstance(array('state'=>'1', 'access' => $groups));
                                        $category = $categories->get((int)$id);
                                        if (!empty($category) && ($category->alias == $alias || empty($alias))) {
                                            $temp[1] = $segments[0];
                                        } else {
                                            $temp[0] = 'producer';
                                        }
                                    } else if (!$alias || ($id == 0 && strpos($id, $tempSegment) !== 0)) {
                                        // this should always result in 404
                                        $temp[0] = 'producer';
                                        $temp[1] = 0;
                                    }
                                }
                            }
                        } else {
                            $temp[0] = 'producer';
                        }

                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'itemform' : {
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'orderform' : {
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'questionform' : {
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'cart' :
                    case 'checkout' :
                    case 'query' :
                    case 'orders' :
                    case 'order' :
                    case 'questions' :
                    case 'question' : {
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                    case 'map' : {
                        $temp[1] = @$activemenu->query['cid'];
                        foreach ($segments as $k=>$v) {
                            $temp[$k+1] = $v;
                        }
                        break;
                    }
                }

                $segments = $temp;
            }
        }
        if (isset($segments[0])) {
            switch($segments[0]) {
                case 'items':
                case 'archived': {
                    $query['view'] = $segments[0];
                    if (isset($segments[1]) && $segments[1] != '') {
                        //$query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1]);
                        $query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1], 'category', $query);
                    }
                    break;
                }
                case 'itemstable': {
                    $query['view'] = 'itemstable';
                    if (isset($segments[1])) {
                        //$query['cid']=($segments[1] == 'all') ? 0 :DJCatalogHelperRoute::parseAlias($segments[1]);
                        $query['cid']=($segments[1] == 'all') ? 0 :DJCatalogHelperRoute::parseAlias($segments[1], 'category', $query);
                    }
                    break;
                }
                case 'item': {
                    $query['view'] = 'item';

                    // checking if last segment matches layout
                    $layout = null;
                    $layouts = array('preview', 'print', 'contact');
                    $scount = count($segments);
                    if (in_array($segments[$scount-1], $layouts)) {
                        $layout = $segments[$scount-1];
                        unset($segments[$scount-1]);

                        if ($layout == 'preview' || $layout == 'print' || $layout == 'contact') {
                            $query['tmpl'] = 'component';
                        }
                    }

                    if (count($segments) > 2) {
                        if (count($segments) > 3) {
                            if (isset($segments[1]) && $segments[1] != '') {
                                //$query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1]);
                                $query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1], 'category', $query);
                            }

                            if (isset($segments[2])) {
                                $query['parent']= DJCatalogHelperRoute::parseAlias($segments[2], 'item', $query);
                            }

                            if (isset($segments[3])) {
                                $query['id']= DJCatalogHelperRoute::parseAlias($segments[3], 'variant', $query);
                            }

                        } else if (count($segments) == 3) {
                            if (isset($segments[1])) {
                                $query['parent']= DJCatalogHelperRoute::parseAlias($segments[1], 'item', $query);
                            }

                            if (isset($segments[2])) {
                                $query['id']= DJCatalogHelperRoute::parseAlias($segments[2], 'variant', $query);
                            }
                        } else {
                            if (isset($segments[2])) {
                                $query['id']= DJCatalogHelperRoute::parseAlias($segments[2], 'item', $query);
                            }
                        }

                    } else if (isset($segments[1])) {
                        //$query['id']=  DJCatalogHelperRoute::parseAlias($segments[1]);
                        $query['id']=  DJCatalogHelperRoute::parseAlias($segments[1], 'item', $query);
                        if ($activemenu && $activemenu->query['option'] == 'com_djcatalog2' && $activemenu->query['view'] == 'items' && !empty($activemenu->query['cid'])) {
                            $query['cid'] = $activemenu->query['cid'];
                        }
                    }

                    if ($layout) {
                        $query['layout'] = $layout;
                    }

                    break;
                }
                case 'producer': {
                    $query['view'] = 'producer';
                    if (isset($segments[1])) {
                        //$query['pid']=$segments[1];
                        $query['pid']=  DJCatalogHelperRoute::parseAlias($segments[1], 'producer', $query);
                    }
                    break;
                }
                case 'itemform': {
                    $query['view'] = 'itemform';
                    if (isset($segments[1])) {
                        $query['id']=$segments[1];
                    }
                    break;
                }
                case 'myitems': {
                    $query['view'] = 'myitems';
                    break;
                }
                case 'producers': {
                    $query['view'] = $segments[0];
                    if (isset($segments[1]) && $segments[1] != '') {
                        //$query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1]);
                        $query['pcid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1], 'producercategory', $query);
                    }
                    break;
                }
                case 'cart': {
                    if (count($segments) == 3) {
                        $query['layout'] = $segments[1];
                        $query['type'] = $segments[2];
                    }  else if (count($segments) == 2) {
                        $query['layout'] = $segments[1];
                    } else if (count($segments) == 1) {
                        $query['layout'] = $segments[0];
                    }
                    $query['view'] = 'cart';
                    break;
                }
                case 'orders': {
                    $query['view'] = 'orders';
                    break;
                }
                case 'checkout': {
                    if ($params->get('cart_one_step')) {
                        $query['type'] = 'checkout';
                        $query['view'] = 'cart';
                        $query['layout'] = 'onestep';
                    } else {
                        $query['view'] = 'checkout';
                    }
                    break;
                }
                case 'query': {
                    if ($params->get('cart_one_step')) {
                        $query['type'] = 'query';
                        $query['view'] = 'cart';
                        $query['layout'] = 'onestep';
                    } else {
                        $query['view'] = 'query';
                    }
                    break;
                }
                case 'order': {
                    $query['view'] = 'order';
                    if (isset($segments[1])) {
                        $query['oid']=$segments[1];
                    }
                    if (isset($segments[2])) {
                        $query['layout']=$segments[2];
                    }
                    break;
                }
                case 'orderform': {
                    $query['view'] = 'orderform';
                    if (isset($segments[1])) {
                        $query['id']=$segments[1];
                    }
                    break;
                }
                case 'questions': {
                    $query['view'] = 'questions';
                    break;
                }
                case 'question': {
                    $query['view'] = 'question';
                    if (isset($segments[1])) {
                        $query['qid']=$segments[1];
                    }
                    break;
                }
                case 'questionform': {
                    $query['view'] = 'questionform';
                    if (isset($segments[1])) {
                        $query['id']=$segments[1];
                    }
                    break;
                }
                case 'map': {
                    $query['view'] = 'map';
                    if (isset($segments[1])) {
                        $query['cid']=($segments[1] == 'all') ? 0 : DJCatalogHelperRoute::parseAlias($segments[1]);
                    }
                    break;
                }
                default: {
                    $query['view'] = $segments[0];
                }
            }
        }
    }

    if (version_compare(JVERSION, '4', 'ge')) {
        $segments = [];
    }

    return $query;
}


class DJCatalog2Router implements RouterInterface
{

    public function build(&$query)
    {
        return DJCatalog2BuildRoute($query);
    }

    /*
     * This function take a category id and finds the path from that category to the root of the category tree
     * The path returned from getPath() is an associative array of key = category id, value = id:alias
     * If no valid category is found from the passed-in category id then null is returned.
     */

    public function parse(&$segments)
    {
        return DJCatalog2ParseRoute($segments);
    }

    public function preprocess($query)
    {
        static $currentLang = null;
        if (Associations::isEnabled())
        {
            $app  = Factory::getApplication();
            $sitemenu = $app->getMenu();
            if (!isset($query['lang']))
            {
                return $query;
            }

            $lang = $query['lang'];

            if ($query['lang'] == $currentLang)
            {
                return $query;
            }

            if (!isset($query['Itemid']))  // we're currently on /component type of URL
            {
                // use the home page for the URL's language
                $home = $sitemenu->getItems(array('language','home'), array($lang, true));
                if ($home)
                {
                    $query['Itemid'] = $home[0]->id;
                }
                return $query;
            }

            $itemid = (!empty($query['Itemid'])) ? $query['Itemid'] : false;

            if ($itemid) {
                // ensure the menuitem for Itemid has the correct language
                $thismenuitem = $sitemenu->getItem($itemid);
                if (!empty($thismenuitem)) {
                    $thismenuitemLang = $thismenuitem->language;
                    if ($thismenuitemLang == $lang)
                    {
                        $currentLang = $thismenuitemLang;
                    }
                    if ($thismenuitemLang == $lang || $thismenuitemLang == '*')
                    {
                        return $query;
                    }

                    // if not, try to find an associated menuitem with the correct language
                    $associations = Associations::getAssociations('com_menus', '#__menu', 'com_menus.item', $itemid, 'id', '', '');

                    if (isset($associations[$lang]))
                    {
                        $query['Itemid'] = (int) $associations[$lang]->id;
                        return $query;
                    }
                    else // use the home page for that language (if it's set)
                    {
                        $home = $sitemenu->getItems(array('language','home'), array($lang, true));
                        if ($home)
                        {
                            $query['Itemid'] = $home[0]->id;
                        }
                    }
                }
            }
        }
        return $query;
    }
}