<?php
/**
 * @package    Joomla.Component.Builder
 *
 * @created    30th April, 2015
 * @author     Llewellyn van der Merwe <https://dev.vdm.io>
 * @git        Joomla Component Builder <https://git.vdm.dev/joomla/Component-Builder>
 * @copyright  Copyright (C) 2015 Vast Development Method. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */
namespace VDM\Component\Componentbuilder\Administrator\Field;

use Joomla\CMS\Factory;
use Joomla\CMS\Form\Field\ListField;
use Joomla\CMS\Language\Text;
use Joomla\CMS\HTML\HTMLHelper as Html;
use Joomla\CMS\Component\ComponentHelper;
use VDM\Component\Componentbuilder\Administrator\Helper\ComponentbuilderHelper;
use VDM\Joomla\Utilities\GetHelper;
use VDM\Joomla\Utilities\GuidHelper;
use VDM\Joomla\Utilities\JsonHelper;
use VDM\Joomla\Utilities\ArrayHelper;

// No direct access to this file
\defined('_JEXEC') or die;

/**
 * Joinfields Form Field class for the Componentbuilder component
 *
 * @since  1.6
 */
class JoinfieldsField extends ListField
{
	/**
	 * The joinfields field type.
	 *
	 * @var        string
	 */
	public $type = 'Joinfields';

	/**
	 * Method to get a list of options for a list input.
	 *
	 * @return  array    An array of Html options.
	 * @since   1.6
	 */
	protected function getOptions()
	{
		// load the db opbject
		$db = Factory::getDBO();		
		// get the input from url
		$jinput = Factory::getApplication()->input;
		// get the id
		$ID = $jinput->getInt('id', 0);
		// rest the fields guids
		$fieldGuids = [];
		if (is_numeric($ID) && $ID >= 1)
		{
			// get the admin view GUID
			$adminView = GetHelper::var('admin_fields_relations', (int) $ID, 'id', 'admin_view');
		}
		else
		{
			// get the admin view GUID
			$initDefaults = $jinput->get('init_defaults', null, 'STRING');
			if (!empty($initDefaults))
			{
				$initDefaults = json_decode(urldecode($initDefaults), true);
				$adminView = $initDefaults['admin_view'] ?? null;
			}
		}
		// make sure we have the admin view ID
		if (GuidHelper::valid($adminView))
		{
			// get all the fields linked to the admin view
			if ($addFields = GetHelper::var('admin_fields',  $adminView, 'admin_view', 'addfields'))
			{
				if (JsonHelper::check($addFields))
				{
					$addFields = json_decode($addFields, true);
					if (ArrayHelper::check($addFields))
					{
						foreach($addFields as $addField)
						{
							if (isset($addField['field']) && (!isset($addField['list']) || ($addField['list'] != 1 && $addField['list'] != 2)))
							{
								$fieldGuids[] = (string) $addField['field'];
							}
						}
					}
				}
			}
			// filter by fields linked
			if (ArrayHelper::check($fieldGuids))
			{
				// get list of field types that does not work in list views (note, spacer)
				$spacers = ComponentbuilderHelper::getSpacerGuids();
				$query = $db->getQuery(true);
				$query->select($db->quoteName(array('a.guid','a.name','t.name'),array('guid','name','type')));
				$query->from($db->quoteName('#__componentbuilder_field', 'a'));
				$query->join('LEFT', $db->quoteName('#__componentbuilder_fieldtype', 't') . ' ON (' . $db->quoteName('a.fieldtype') . ' = ' . $db->quoteName('t.guid') . ')');
				$query->where($db->quoteName('a.published') . ' >= 1');
				// only load these fields
				$query->where($db->quoteName('a.guid') . ' IN ("' . implode('","', $fieldGuids) . '")');
				// none of these field types
				if (ArrayHelper::check($spacers))
				{
					$query->where($db->quoteName('a.fieldtype') . ' NOT IN ("' . implode('","', $spacers) . '")');
				}
				$query->order('a.name ASC');
				$db->setQuery((string)$query);
				$items = $db->loadObjectList();
				$options = array();
				if ($items)
				{
					foreach($items as $item)
					{
						$options[] = Html::_('select.option', $item->guid, $item->name . ' [' . $item->type . ']');
					}
				}
				return $options;
			}
		}
		return [Html::_('select.option', '', Text::_('COM_COMPONENTBUILDER_ADD_MORE_FIELDS_TO_THIS_ADMIN_VIEW'))];
	}
}