<?php

declare(strict_types=1);

/*
 * This file is part of Oveleon ContaoMemberExtension Bundle.
 *
 * @package     contao-member-extension-bundle
 * @license     MIT
 * @author      Daniele Sciannimanica   <https://github.com/doishub>
 * @author      Fabian Ekert            <https://github.com/eki89>
 * @author      Sebastian Zoglowek      <https://github.com/zoglo>
 * @copyright   Oveleon                 <https://www.oveleon.de/>
 */

namespace Oveleon\ContaoMemberExtensionBundle;

use Contao\BackendTemplate;
use Contao\Config;
use Contao\CoreBundle\Exception\PageNotFoundException;
use Contao\Environment;
use Contao\FrontendTemplate;
use Contao\Input;
use Contao\MemberModel;
use Contao\Model\Collection;
use Contao\Pagination;
use Contao\StringUtil;
use Contao\System;

/**
 * Class ModuleMemberList
 *
 * @property string $ext_order order of list items
 * @property string ext_orderField order field for list items
 * @property string $ext_groups considered member groups
 * @property string $memberFields Fields to be displayed
 * @property string $memberListTpl Frontend list template
 */
class ModuleMemberList extends ModuleMemberExtension
{

    /**
     * Template
     * @var string
     */
    protected $strTemplate = 'mod_memberList';

    /**
     * Template
     * @var string
     */
    protected $strMemberTemplate = 'memberExtension_list_default';

    /**
     * Return a wildcard in the back end
     *
     * @return string
     */
    public function generate()
    {
        $request = System::getContainer()->get('request_stack')->getCurrentRequest();

        if ($request && System::getContainer()->get('contao.routing.scope_matcher')->isBackendRequest($request))
        {
            $objTemplate = new BackendTemplate('be_wildcard');
            $objTemplate->wildcard = '### ' . mb_strtoupper($GLOBALS['TL_LANG']['FMD']['memberList'][0], 'UTF-8') . ' ###';
            $objTemplate->title = $this->headline;
            $objTemplate->id = $this->id;
            $objTemplate->link = $this->name;
            $objTemplate->href = 'contao/main.php?do=themes&amp;table=tl_module&amp;act=edit&amp;id=' . $this->id;

            return $objTemplate->parse();
        }

        return parent::generate();
    }

    /**
     * Generate the module
     */
    protected function compile()
    {
        $limit = null;
        $offset = 0;

        $arrGroups = StringUtil::deserialize($this->ext_groups);

        if(empty($arrGroups) || !\is_array($arrGroups))
        {
            $this->Template->empty = $GLOBALS['TL_LANG']['MSC']['emptyMemberList'];
            return;
        }

        $objTemplate = new FrontendTemplate($this->memberListTpl ?: $this->strMemberTemplate);

        $objMembers = $this->getMembers();

        $intTotal = 0;

        $arrMembers = [];

        if(null !== $objMembers)
        {
            while($objMembers->next())
            {
                $objMember = $objMembers->current();

                if(!$this->checkMemberGroups($arrGroups, $objMember))
                {
                    continue;
                }

                $intTotal += 1;

                $arrMemberFields = StringUtil::deserialize($this->memberFields, true);
                $objTemplate->setData($objMember->row());

                $arrMembers[] = $this->parseMemberTemplate($objMember, $objTemplate, $arrMemberFields, $this->imgSize);
            }
        }

        $total = $intTotal - $offset;

        if ($this->numberOfItems > 0)
        {
            $limit = $this->numberOfItems;
        }

        if ($this->perPage > 0 && (!isset($limit) || $this->numberOfItems > $this->perPage))
        {
            if (isset($limit))
            {
                $total = min($limit, $total);
            }

            $id = 'page_n' . $this->id;
            $page = Input::get($id) ?? 1;

            if ($page < 1 || $page > max(ceil($total/$this->perPage), 1))
            {
                throw new PageNotFoundException('Page not found: ' . Environment::get('uri'));
            }

            $limit = $this->perPage;
            $offset += (max($page, 1) - 1) * $this->perPage;
            $skip = 0;

            if ($offset + $limit > $total + $skip)
            {
                $limit = $total + $skip - $offset;
            }

            $arrMembers = \array_slice($arrMembers, $offset, ((int) $limit ?: $intTotal), true);

            $objPagination = new Pagination($total, $this->perPage, Config::get('maxPaginationLinks'), $id);
            $this->Template->pagination = $objPagination->generate("\n  ");
        }

        if(empty($arrMembers))
        {
            $this->Template->empty = $GLOBALS['TL_LANG']['MSC']['emptyMemberList'];
        }

        $this->Template->members = $arrMembers;
    }

    /**
     * Checks whether a member is in any given group
     *
     * @param array $arrGroups
     * @param MemberModel $objMember
     * @return bool
     */
    private function checkMemberGroups(array $arrGroups, MemberModel $objMember): bool
    {
        if(empty($arrGroups))
        {
            return false;
        }

        $arrMemberGroups = StringUtil::deserialize($objMember->groups);

        if(!\is_array($arrMemberGroups) || !\count(array_intersect($arrGroups, $arrMemberGroups)))
        {
            return false;
        }

        return true;
    }

    /**
     * Get members
     *
     * @return Collection|MemberModel|null
     */
    private function getMembers()
    {
        $t = MemberModel::getTable();
        $arrOptions = ['order' => ''];

        if (!!$this->ext_orderField)
        {
            $arrOptions['order'] .= "$t.$this->ext_orderField ";
        }

        switch ($this->ext_order)
        {
            case 'order_random':
                $arrOptions['order'] = "RAND()";
                break;

            case 'order_desc':
                $arrOptions['order'] .= "DESC";
                break;

            case 'order_asc':
            default:
                break;
        }

        return MemberModel::findBy(["$t.disable=''"], null, $arrOptions);
    }
}