/**
     * Set config directory
     *
     * @param $config_dir
     *
     * @return Smarty       current Smarty instance for chaining
     */
    public function setConfigDir($config_dir)
    {
        return $this->setTemplateDir($config_dir, true);
    }

    /**
     * Adds directory of plugin files
     *
     * @param null|array|string $plugins_dir
     *
     * @return Smarty current Smarty instance for chaining
     */
    public function addPluginsDir($plugins_dir)
    {
        if (empty($this->plugins_dir)) {
            $this->plugins_dir[] = SMARTY_PLUGINS_DIR;
        }
        $this->plugins_dir = array_merge($this->plugins_dir, (array)$plugins_dir);
        $this->_pluginsDirNormalized = false;
        return $this;
    }

    /**
     * Get plugin directories
     *
     * @return array list of plugin directories
     */
    public function getPluginsDir()
    {
        if (empty($this->plugins_dir)) {
            $this->plugins_dir[] = SMARTY_PLUGINS_DIR;
            $this->_pluginsDirNormalized = false;
        }
        if (!$this->_pluginsDirNormalized) {
            if (!is_array($this->plugins_dir)) {
                $this->plugins_dir = (array)$this->plugins_dir;
            }
            foreach ($this->plugins_dir as $k => $v) {
                $this->plugins_dir[ $k ] = $this->_realpath(rtrim($v ?? '', '/\\') . DIRECTORY_SEPARATOR, true);
            }
            $this->_cache[ 'plugin_files' ] = array();
            $this->_pluginsDirNormalized = true;
        }
        return $this->plugins_dir;
    }

    /**
     * Set plugins directory
     *
     * @param string|array $plugins_dir directory(s) of plugins
     *
     * @return Smarty       current Smarty instance for chaining
     */
    public function setPluginsDir($plugins_dir)
    {
        $this->plugins_dir = (array)$plugins_dir;
        $this->_pluginsDirNormalized = false;
        return $this;
    }

    /**
     * Get compiled directory
     *
     * @return string path to compiled templates
     */
    public function getCompileDir()
    {
        if (!$this->_compileDirNormalized) {
            $this->_normalizeDir('compile_dir', $this->compile_dir);
            $this->_compileDirNormalized = true;
        }
        return $this->compile_dir;
    }

    /**
     *
     * @param  string $compile_dir directory to store compiled templates in
     *
     * @return Smarty current Smarty instance for chaining
     */
    public function setCompileDir($compile_dir)
    {
        $this->_normalizeDir('compile_dir', $compile_dir);
        $this->_compileDirNormalized = true;
        return $this;
    }

    /**
     * Get cache directory
     *
     * @return string path of cache directory
     */
    public function getCacheDir()
    {
        if (!$this->_cacheDirNormalized) {
            $this->_normalizeDir('cache_dir', $this->cache_dir);
            $this->_cacheDirNormalized = true;
        }
        return $this->cache_dir;
    }

    /**
     * Set cache directory
     *
     * @param string $cache_dir directory to store cached templates in
     *
     * @return Smarty current Smarty instance for chaining
     */
    public function setCacheDir($cache_dir)
    {
        $this->_normalizeDir('cache_dir', $cache_dir);
        $this->_cacheDirNormalized = true;
        return $this;
    }

    /**
     * creates a template object
     *
     * @param string  $template   the resource handle of the template file
     * @param mixed   $cache_id   cache id to be used with this template
     * @param mixed   $compile_id compile id to be used with this template
     * @param object  $parent     next higher level of Smarty variables
     * @param boolean $do_clone   flag is Smarty object shall be cloned
     *
     * @return \Smarty_Internal_Template template object
     * @throws \SmartyException
     */
    public function createTemplate($template, $cache_id = null, $compile_id = null, $parent = null, $do_clone = true)
    {
        if ($cache_id !== null && (is_object($cache_id) || is_array($cache_id))) {
            $parent = $cache_id;
            $cache_id = null;
        }
        if ($parent !== null && is_array($parent)) {
            $data = $parent;
            $parent = null;
        } else {
            $data = null;
        }
        if (!$this->_templateDirNormalized) {
            $this->_normalizeTemplateConfig(false);
        }
        $_templateId = $this->_getTemplateId($template, $cache_id, $compile_id);
        $tpl = null;
        if ($this->caching && isset(Smarty_Internal_Template::$isCacheTplObj[ $_templateId ])) {
            $tpl = $do_clone ? clone Smarty_Internal_Template::$isCacheTplObj[ $_templateId ] :
                Smarty_Internal_Template::$isCacheTplObj[ $_templateId ];
            $tpl->inheritance = null;
            $tpl->tpl_vars = $tpl->config_vars = array();
        } elseif (!$do_clone && isset(Smarty_Internal_Template::$tplObjCache[ $_templateId ])) {
            $tpl = clone Smarty_Internal_Template::$tplObjCache[ $_templateId ];
            $tpl->inheritance = null;
            $tpl->tpl_vars = $tpl->config_vars = array();
        } else {
            /* @var Smarty_Internal_Template $tpl */
            $tpl = new $this->template_class($template, $this, null, $cache_id, $compile_id, null, null);
            $tpl->templateId = $_templateId;
        }
        if ($do_clone) {
            $tpl->smarty = clone $tpl->smarty;
        }
        $tpl->parent = $parent ? $parent : $this;
        // fill data if present
        if (!empty($data) && is_array($data)) {
            // set up variable values
            foreach ($data as $_key => $_val) {
                $tpl->tpl_vars[ $_key ] = new Smarty_Variable($_val);
            }
        }
        if ($this->debugging || $this->debugging_ctrl === 'URL') {
            $tpl->smarty->_debug = new Smarty_Internal_Debug();
            // check URL debugging control
            if (!$this->debugging && $this->debugging_ctrl === 'URL') {
                $tpl->smarty->_debug->debugUrl($tpl->smarty);
            }
        }
        return $tpl;
    }

    /**
     * Takes unknown classes and loads plugin files for them
     * class name format: Smarty_PluginType_PluginName
     * plugin filename format: plugintype.pluginname.php
     *
     * @param string $plugin_name class plugin name to load
     * @param bool   $check       check if already loaded
     *
     * @return string |boolean filepath of loaded file or false
     * @throws \SmartyException
     */
    public function loadPlugin($plugin_name, $check = true)
    {
        return $this->ext->loadPlugin->loadPlugin($this, $plugin_name, $check);
    }

    /**
     * Get unique template id
     *
     * @param string                    $template_name
     * @param null|mixed                $cache_id
     * @param null|mixed                $compile_id
     * @param null                      $caching
     * @param \Smarty_Internal_Template $template
     *
     * @return string
     * @throws \SmartyException
     */
    public function _getTemplateId(
        $template_name,
        $cache_id = null,
        $compile_id = null,
        $caching = null,
        Smarty_Internal_Template $template = null
    ) {
        $template_name = (strpos($template_name, ':') === false) ? "{$this->default_resource_type}:{$template_name}" :
            $template_name;
        $cache_id = $cache_id === null ? $this->cache_id : $cache_id;
        $compile_id = $compile_id === null ? $this->compile_id : $compile_id;
        $caching = (int)($caching === null ? $this->caching : $caching);
        if ((isset($template) && strpos($template_name, ':.') !== false) || $this->allow_ambiguous_resources) {
            $_templateId =
                Smarty_Resource::getUniqueTemplateName((isset($template) ? $template : $this), $template_name) .
                "#{$cache_id}#{$compile_id}#{$caching}";
        } else {
            $_templateId = $this->_joined_template_dir . "#{$template_name}#{$cache_id}#{$compile_id}#{$caching}";
        }
        if (isset($_templateId[ 150 ])) {
            $_templateId = sha1($_templateId);
        }
        return $_templateId;
    }

    /**
     * Normalize path
     *  - remove /./ and /../
     *  - make it absolute if required
     *
     * @param string $path     file path
     * @param bool   $realpath if true - convert to absolute
     *                         false - convert to relative
     *                         null - keep as it is but
     *                         remove /./ /../
     *
     * @return string
     */
    public function _realpath($path, $realpath = null)
    {
        $nds = array('/' => '\\', '\\' => '/');
        preg_match(
            '%^(?<root>(?:[[:alpha:]]:[\\\\/]|/|[\\\\]{2}[[:alpha:]]+|[[:print:]]{2,}:[/]{2}|[\\\\])?)(?<path>(.*))$%u',
            $path,
            $parts
        );
        $path = $parts[ 'path' ];
        if ($parts[ 'root' ] === '\\') {
            $parts[ 'root' ] = substr(getcwd(), 0, 2) . $parts[ 'root' ];
        } else {
            if ($realpath !== null && !$parts[ 'root' ]) {
                $path = getcwd() . DIRECTORY_SEPARATOR . $path;
            }
        }
        // normalize DIRECTORY_SEPARATOR
        $path = str_replace($nds[ DIRECTORY_SEPARATOR ], DIRECTORY_SEPARATOR, $path);
        $parts[ 'root' ] = str_replace($nds[ DIRECTORY_SEPARATOR ], DIRECTORY_SEPARATOR, $parts[ 'root' ]);
        do {
            $path = preg_replace(
                array('#[\\\\/]{2}#', '#[\\\\/][.][\\\\/]#', '#[\\\\/]([^\\\\/.]+)[\\\\/][.][.][\\\\/]#'),
                DIRECTORY_SEPARATOR,
                $path,
                -1,
                $count
            );
        } while ($count > 0);
        return $realpath !== false ? $parts[ 'root' ] . $path : str_ireplace(getcwd(), '.', $parts[ 'root' ] . $path);
    }

    /**
     * Empty template objects cache
     */
    public function _clearTemplateCache()
    {
        Smarty_Internal_Template::$isCacheTplObj = array();
        Smarty_Internal_Template::$tplObjCache = array();
    }

    /**
     * @param boolean $use_sub_dirs
     */
    public function setUseSubDirs($use_sub_dirs)
    {
        $this->use_sub_dirs = $use_sub_dirs;
    }

    /**
     * @param int $error_reporting
     */
    public function setErrorReporting($error_reporting)
    {
        $this->error_reporting = $error_reporting;
    }

    /**
     * @param boolean $escape_html
     */
    public function setEscapeHtml($escape_html)
    {
        $this->escape_html = $escape_html;
    }

    /**
     * Return auto_literal flag
     *
     * @return boolean
     */
    public function getAutoLiteral()
    {
        return $this->auto_literal;
    }

    /**
     * Set auto_literal flag
     *
     * @param boolean $auto_literal
     */
    public function setAutoLiteral($auto_literal = true)
    {
        $this->auto_literal = $auto_literal;
    }

    /**
     * @param boolean $force_compile
     */
    public function setForceCompile($force_compile)
    {
        $this->force_compile = $force_compile;
    }

    /**
     * @param boolean $merge_compiled_includes
     */
    public function setMergeCompiledIncludes($merge_compiled_includes)
    {
        $this->merge_compiled_includes = $merge_compiled_includes;
    }

    /**
     * Get left delimiter
     *
     * @return string
     */
    public function getLeftDelimiter()
    {
        return $this->left_delimiter;
    }

    /**
     * Set left delimiter
     *
     * @param string $left_delimiter
     */
    public function setLeftDelimiter($left_delimiter)
    {
        $this->left_delimiter = $left_delimiter;
    }

    /**
     * Get right delimiter
     *
     * @return string $right_delimiter
     */
    public function getRightDelimiter()
    {
        return $this->right_delimiter;
    }

    /**
     * Set right delimiter
     *
     * @param string
     */
    public function setRightDelimiter($right_delimiter)
    {
        $this->right_delimiter = $right_delimiter;
    }

    /**
     * @param boolean $debugging
     */
    public function setDebugging($debugging)
    {
        $this->debugging = $debugging;
    }

    /**
     * @param boolean $config_overwrite
     */
    public function setConfigOverwrite($config_overwrite)
    {
        $this->config_overwrite = $config_overwrite;
    }

    /**
     * @param boolean $config_booleanize
     */
    public function setConfigBooleanize($config_booleanize)
    {
        $this->config_booleanize = $config_booleanize;
    }

    /**
     * @param boolean $config_read_hidden
     */
    public function setConfigReadHidden($config_read_hidden)
    {
        $this->config_read_hidden = $config_read_hidden;
    }

    /**
     * @param boolean $compile_locking
     */
    public function setCompileLocking($compile_locking)
    {
        $this->compile_locking = $compile_locking;
    }

    /**
     * @param string $default_resource_type
     */
    public function setDefaultResourceType($default_resource_type)
    {
        $this->default_resource_type = $default_resource_type;
    }

    /**
     * @param string $caching_type
     */
    public function setCachingType($caching_type)
    {
        $this->caching_type = $caching_type;
    }

    /**
     * Test install
     *
     * @param null $errors
     */
    public function testInstall(&$errors = null)
    {
        Smarty_Internal_TestInstall::testInstall($this, $errors);
    }

    /**
     * Get Smarty object
     *
     * @return Smarty
     */
    public function _getSmartyObj()
    {
        return $this;
    }

    /**
     * <<magic>> Generic getter.
     * Calls the appropriate getter function.
     * Issues an E_USER_NOTICE if no valid getter is found.
     *
     * @param string $name property name
     *
     * @return mixed
     */
    public function __get($name)
    {
        if (isset($this->accessMap[ $name ])) {
            $method = 'get' . $this->accessMap[ $name ];
            return $this->{$method}();
        } elseif (isset($this->_cache[ $name ])) {
            return $this->_cache[ $name ];
        } elseif (in_array($name, $this->obsoleteProperties)) {
            return null;
        } else {
            trigger_error('Undefined property: ' . get_class($this) . '::$' . $name, E_USER_NOTICE);
        }
        return null;
    }

    /**
     * <<magic>> Generic setter.
     * Calls the appropriate setter function.
     * Issues an E_USER_NOTICE if no valid setter is found.
     *
     * @param string $name  property name
     * @param mixed  $value parameter passed to setter
     *
     */
    public function __set($name, $value)
    {
        if (isset($this->accessMap[ $name ])) {
            $method = 'set' . $this->accessMap[ $name ];
            $this->{$method}($value);
        } elseif (in_array($name, $this->obsoleteProperties)) {
            return;
        } elseif (is_object($value) && method_exists($value, $name)) {
            $this->$name = $value;
        } else {
            trigger_error('Undefined property: ' . get_class($this) . '::$' . $name, E_USER_NOTICE);
        }
    }

    /**
     * Normalize and set directory string
     *
     * @param string $dirName cache_dir or compile_dir
     * @param string $dir     filepath of folder
     */
    private function _normalizeDir($dirName, $dir)
    {
        $this->{$dirName} = $this->_realpath(rtrim($dir ?? '', "/\\") . DIRECTORY_SEPARATOR, true);
    }

    /**
     * Normalize template_dir or config_dir
     *
     * @param bool $isConfig true for config_dir
     */
    private function _normalizeTemplateConfig($isConfig)
    {
        if ($isConfig) {
            $processed = &$this->_processedConfigDir;
            $dir = &$this->config_dir;
        } else {
            $processed = &$this->_processedTemplateDir;
            $dir = &$this->template_dir;
        }
        if (!is_array($dir)) {
            $dir = (array)$dir;
        }
        foreach ($dir as $k => $v) {
            if (!isset($processed[ $k ])) {
                $dir[ $k ] = $v = $this->_realpath(rtrim($v ?? '', "/\\") . DIRECTORY_SEPARATOR, true);
                $processed[ $k ] = true;
            }
        }
        $isConfig ? $this->_configDirNormalized = true : $this->_templateDirNormalized = true;
        $isConfig ? $this->_joined_config_dir = join('#', $this->config_dir) :
            $this->_joined_template_dir = join('#', $this->template_dir);
    }

    /**
     * Activates PHP7 compatibility mode:
     * - converts E_WARNINGS for "undefined array key" and "trying to read property of null" errors to E_NOTICE
     *
     * @void
     */
    public function muteUndefinedOrNullWarnings(): void {
        $this->isMutingUndefinedOrNullWarnings = true;
    }

    /**
     * Indicates if PHP7 compatibility mode is set.
     * @bool
     */
    public function isMutingUndefinedOrNullWarnings(): bool {
        return $this->isMutingUndefinedOrNullWarnings;
    }

}