<?php
/**
 * @package         Sourcerer
 * @version         9.4.1
 * 
 * @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\Sourcerer;

defined('_JEXEC') or die;

use Joomla\CMS\Factory as JFactory;
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 $areas   = null;
    protected static $params  = null;
    protected static $regexes = null;

    public static function get($key = '', $default = '')
    {
        if ($key != '')
        {
            return self::getByKey($key, $default);
        }

        if ( ! is_null(self::$params))
        {
            return self::$params;
        }

        $user = JFactory::getApplication()->getIdentity() ?: JFactory::getUser();

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

        $params->tag = RL_PluginTag::clean($params->syntax_word);

        $params->html_tags_syntax = [['<', '>'], ['\[\[', '\]\]']];
        $params->splitter         = '<!-- START: SRC_SPLIT -->';

        $params->include_path  = str_replace('//', '/', ('/' . trim($params->include_path, ' /\\') . '/'));
        $params->user_is_admin = $user->authorise('core.admin', 1);


        self::$params = $params;

        return self::$params;
    }

    public static function getArea($type = 'default')
    {
        $areas = self::getAreaSettings();

        return $areas->{$type} ?? $areas->default;
    }

    public static function getAreaSettings()
    {
        if ( ! is_null(self::$areas))
        {
            return self::$areas;
        }

        $areas = (object) [];

        // Initialise the different enables
        $areas->default = self::getAreaDefault();

        self::$areas = $areas;

        return self::$areas;
    }

    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 getTags($only_start_tags = false)
    {
        $params = self::get();

        [$tag_start, $tag_end] = self::getTagCharacters();

        $tags = [
            [
                $tag_start . $params->tag,
            ],
            [
                $tag_start . '/' . $params->tag . $tag_end,
            ],
        ];

        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 getAreaByType($type = 'default')
    {
    }

    private static function getAreaDefault()
    {
        $params = self::get();

        return (object) [
            'enable'         => true,
            'enable_css'     => $params->enable_css,
            'enable_js'      => $params->enable_js,
            'enable_php'     => $params->enable_php,
            'forbidden_php'  => $params->forbidden_php,
            'forbidden_tags' => $params->forbidden_tags,
        ];
    }

    private static function getByKey($key, $default = '')
    {
        $params = self::get();

        return ($params->{$key} ?? null) ?: $default;
    }

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

        $params = self::get();

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

        $pre  = RL_PluginTag::getRegexSurroundingTagPre();
        $post = RL_PluginTag::getRegexSurroundingTagPost();

        $spaces = RL_PluginTag::getRegexSpaces('*');

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

        self::$regexes->tag = '('
            . '(?<start_pre>' . $pre . ')'
            . $tag_start . RL_RegEx::quote($params->tag) . $spaces . '(?<data>( .*?)?)' . $tag_end
            . '(?<start_post>' . $post . ')'

            . '(?<content>.*?)'

            . '(?<end_pre>' . $pre . ')'
            . $tag_start . '\/' . RL_RegEx::quote($params->tag) . $tag_end
            . '(?<end_post>' . $post . ')'
            . ')';

        return self::$regexes;
    }
}