<?php
/**
 * @package         Modules Anywhere
 * @version         7.16.5
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            http://regularlabs.com
 * @copyright       Copyright © 2023 Regular Labs All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

namespace RegularLabs\Plugin\System\ModulesAnywhere;

defined('_JEXEC') or die;

use RegularLabs\Library\Parameters as RL_Parameters;
use RegularLabs\Library\PluginTag as RL_PluginTag;
use RegularLabs\Library\RegEx as RL_RegEx;

class Params
{
    protected static $params  = null;
    protected static $regexes = null;

    public static function get()
    {
        if ( ! is_null(self::$params))
        {
            return self::$params;
        }

        $params = RL_Parameters::getPlugin('modulesanywhere');

        $params->tag_module = RL_PluginTag::clean($params->module_tag);
        $params->tag_pos    = RL_PluginTag::clean($params->modulepos_tag);


        self::$params = $params;

        return self::$params;
    }

    public static function getCoreTagNames()
    {
        $params = self::get();

        if ( ! $params->handle_core_tags)
        {
            return [];
        }

        return [
            'loadmodule',
            'loadmoduleid',
            'loadposition',
        ];
    }

    public static function getRegex($type = 'tag')
    {
        $regexes = self::getRegexes();

        return $regexes->{$type} ?? $regexes->tag;
    }

    public static function getTagCharacters()
    {
        $params = self::get();

        if ( ! isset($params->tag_character_start))
        {
            self::setTagCharacters();
        }

        return [$params->tag_character_start, $params->tag_character_end];
    }

    public static function getTagNames()
    {
        $params = self::get();

        return [
            $params->tag_module,
            $params->tag_pos,
        ];
    }

    public static function getTags($only_start_tags = false)
    {
        [$tag_start, $tag_end] = self::getTagCharacters();

        $tags = [
            [],
            [
                $tag_end,
            ],
        ];

        foreach (self::getTagNames() as $tag)
        {
            $tags[0][] = $tag_start . $tag;
        }

        foreach (self::getCoreTagNames() as $tag)
        {
            $tags[0][] = '{' . $tag;
        }

        return $only_start_tags ? $tags[0] : $tags;
    }

    public static function setTagCharacters()
    {
        $params = self::get();

        [self::$params->tag_character_start, self::$params->tag_character_end] = explode('.', $params->tag_characters);
    }

    private static function getRegexes()
    {
        if ( ! is_null(self::$regexes))
        {
            return self::$regexes;
        }

        // Tag character start and end
        [$tag_start, $tag_end] = Params::getTagCharacters();

        $pre        = RL_PluginTag::getRegexLeadingHtml();
        $post       = RL_PluginTag::getRegexTrailingHtml();
        $inside_tag = RL_PluginTag::getRegexInsideTag($tag_start, $tag_end);
        $spaces     = RL_PluginTag::getRegexSpaces();

        $tag_start = RL_RegEx::quote($tag_start);
        $tag_end   = RL_RegEx::quote($tag_end);

        self::$regexes = (object) [];

        $tags      = self::getTagNames();
        $core_tags = self::getCoreTagNames();

        $tags      = RL_RegEx::quote($tags, 'type');
        $core_tags = ! empty($core_tags) ? RL_RegEx::quote(self::getCoreTagNames(), 'type_core') : [];

        self::$regexes->tag =
            '(?<pre>' . $pre . ')'
            . '(?:'
            . $tag_start . $tags . $spaces . '(?<id>' . $inside_tag . ')' . $tag_end
            . (! empty($core_tags) ? '|\{' . $core_tags . $spaces . '(?<id_core>' . $inside_tag . ')\}' : '')
            . ')'
            . '(?<post>' . $post . ')';

        return self::$regexes;
    }
}
