<?php
/**
 * @package         Regular Labs Library
 * @version         23.12.10783
 * 
 * @author          Peter van Westen <[email protected]>
 * @link            https://regularlabs.com
 * @copyright       Copyright © 2023 Regular Labs All Rights Reserved
 * @license         GNU General Public License version 2 or later
 */

namespace RegularLabs\Library;

defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper as JComponentHelper;
use Joomla\CMS\Plugin\PluginHelper as JPluginHelper;
use RegularLabs\Library\ObjectHelper as RL_Object;

class Parameters
{
    /**
     * Get a usable parameter object for the component
     */
    public static function getComponent(
        string                   $name,
        object|array|string|null $params = null,
        bool                     $use_cache = true
    ): object
    {
        $name = 'com_' . RegEx::replace('^com_', '', $name);

        $cache = new Cache;

        if ($use_cache && $cache->exists())
        {
            return $cache->get();
        }

        if (empty($params) && JComponentHelper::isInstalled($name))
        {
            $params = JComponentHelper::getParams($name);
        }

        return $cache->set(
            self::getObjectFromRegistry(
                $params,
                JPATH_ADMINISTRATOR . '/components/' . $name . '/config.xml'
            )
        );
    }

    /**
     * Get a usable parameter object for the module
     */
    public static function getModule(
        string                   $name,
        bool                     $admin = true,
        object|array|string|null $params = null,
        bool                     $use_cache = true
    ): object
    {
        $name = 'mod_' . RegEx::replace('^mod_', '', $name);

        $cache = new Cache;

        if ($use_cache && $cache->exists())
        {
            return $cache->get();
        }

        if (empty($params))
        {
            $params = null;
        }

        return $cache->set(
            self::getObjectFromRegistry(
                $params,
                ($admin ? JPATH_ADMINISTRATOR : JPATH_SITE) . '/modules/' . $name . '/' . $name . '.xml'
            )
        );
    }

    /**
     * Get a usable parameter object based on the Joomla Registry object
     * The object will have all the available parameters with their value (default value if none is set)
     */
    public static function getObjectFromRegistry(
        object|array|string|null $params,
        string                   $path = '',
        string                   $default = '',
        bool                     $use_cache = true
    ): object
    {
        $cache = new Cache;

        if ($use_cache && $cache->exists())
        {
            return $cache->get();
        }

        $xml = self::loadXML($path, $default);

        if (empty($params))
        {
            return $cache->set((object) $xml);
        }

        if (is_array($params))
        {
            $params = (object) $params;
        }

        if (is_string($params))
        {
            $params = json_decode($params);
        }

        if (is_object($params) && method_exists($params, 'toObject'))
        {
            $params = $params->toObject();
        }

        if (is_null($xml))
        {
            $xml = (object) [];
        }

        if ( ! $params)
        {
            return $cache->set((object) $xml);
        }

        if (empty($xml))
        {
            return $cache->set($params);
        }

        foreach ($xml as $key => $val)
        {
            if (isset($params->{$key}) && $params->{$key} != '')
            {
                continue;
            }

            $params->{$key} = $val;
        }

        return $cache->set($params);
    }

    /**
     * Get a usable parameter object for the plugin
     */
    public static function getPlugin(
        string                   $name,
        string                   $type = 'system',
        object|array|string|null $params = null,
        bool                     $use_cache = true
    ): object
    {
        $cache = new Cache;

        if ($use_cache && $cache->exists())
        {
            return $cache->get();
        }

        if (empty($params))
        {
            $plugin = JPluginHelper::getPlugin($type, $name);
            $params = (is_object($plugin) && isset($plugin->params)) ? $plugin->params : null;
        }

        return $cache->set(
            self::getObjectFromRegistry(
                $params,
                JPATH_PLUGINS . '/' . $type . '/' . $name . '/' . $name . '.xml'
            )
        );
    }

    /**
     * Returns an array based on the data in a given xml file
     */
    public static function loadXML(
        string  $path,
        ?string $default = '',
        bool    $use_cache = true,
        bool    $full_info = false
    ): array
    {
        $cache = new Cache;

        if ($use_cache && $cache->exists())
        {
            return $cache->get();
        }

        if ( ! $path
            || ! file_exists($path)
        )
        {
            return $cache->set([]);
        }

        $file = file_get_contents($path);

        if ( ! $file)
        {
            return $cache->set([]);
        }

        $xml = [];

        $xml_parser = xml_parser_create();
        xml_parse_into_struct($xml_parser, $file, $fields);
        xml_parser_free($xml_parser);

        $default = $default ? strtoupper($default) : 'DEFAULT';

        foreach ($fields as $field)
        {
            if (
                $field['tag'] != 'FIELD'
                || ! isset($field['attributes'])
                || ! isset($field['attributes']['NAME'])
                || $field['attributes']['NAME'] == ''
                || $field['attributes']['NAME'][0] == '@'
                || ! isset($field['attributes']['TYPE'])
                || $field['attributes']['TYPE'] == 'spacer'
            )
            {
                continue;
            }

            if ($full_info)
            {
                $full_object           = $xml[$field['attributes']['NAME']] = RL_Object::changeKeyCase($field['attributes'], 'lower');
                $full_object->multiple ??= 'false';
            }

            if (isset($field['attributes'][$default]))
            {
                $field['attributes']['DEFAULT'] = $field['attributes'][$default];
            }

            if ( ! isset($field['attributes']['DEFAULT']))
            {
                $field['attributes']['DEFAULT'] = '';
            }

            if ($field['attributes']['TYPE'] == 'textarea')
            {
                $field['attributes']['DEFAULT'] = str_replace('<br>', "\n", $field['attributes']['DEFAULT']);
            }

            if ($full_info)
            {
                $full_object->value = $field['attributes']['DEFAULT'];

                continue;
            }

            $xml[$field['attributes']['NAME']] = $field['attributes']['DEFAULT'];
        }

        return $cache->set($xml);
    }

    public static function overrideFromObject(object $params, ?object $object = null): object
    {
        if (empty($object))
        {
            return $params;
        }

        foreach ($params as $key => $value)
        {
            if ( ! isset($object->{$key}))
            {
                continue;
            }

            $params->{$key} = $object->{$key};
        }

        return $params;
    }
}