<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_fields
 *
 * @copyright   (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Fields\Administrator\Field;

use Joomla\CMS\Filesystem\Folder;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Form\FormField;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Form Field to display a list of the layouts for a field from
 * the extension or template overrides.
 *
 * @since  3.9.0
 */
class FieldLayoutField extends FormField
{
    /**
     * The form field type.
     *
     * @var    string
     * @since  3.9.0
     */
    protected $type = 'FieldLayout';

    /**
     * Method to get the field input for a field layout field.
     *
     * @return  string   The field input.
     *
     * @since   3.9.0
     */
    protected function getInput()
    {
        $extension = explode('.', $this->form->getValue('context'));
        $extension = $extension[0];

        if ($extension) {
            // Get the database object and a new query object.
            $db    = $this->getDatabase();
            $query = $db->getQuery(true);

            // Build the query.
            $query->select('element, name')
                ->from('#__extensions')
                ->where('client_id = 0')
                ->where('type = ' . $db->quote('template'))
                ->where('enabled = 1');

            // Set the query and load the templates.
            $db->setQuery($query);
            $templates = $db->loadObjectList('element');

            // Build the search paths for component layouts.
            $component_path = Path::clean(JPATH_SITE . '/components/' . $extension . '/layouts/field');

            // Prepare array of component layouts
            $component_layouts = [];

            // Prepare the grouped list
            $groups = [];

            // Add "Use Default"
            $groups[]['items'][] = HTMLHelper::_('select.option', '', Text::_('JOPTION_USE_DEFAULT'));

            // Add the layout options from the component path.
            if (is_dir($component_path) && ($component_layouts = Folder::files($component_path, '^[^_]*\.php$', false, true))) {
                // Create the group for the component
                $groups['_']          = [];
                $groups['_']['id']    = $this->id . '__';
                $groups['_']['text']  = Text::sprintf('JOPTION_FROM_COMPONENT');
                $groups['_']['items'] = [];

                foreach ($component_layouts as $i => $file) {
                    // Add an option to the component group
                    $value                 = basename($file, '.php');
                    $component_layouts[$i] = $value;

                    if ($value === 'render') {
                        continue;
                    }

                    $groups['_']['items'][] = HTMLHelper::_('select.option', $value, $value);
                }
            }

            // Loop on all templates
            if ($templates) {
                foreach ($templates as $template) {
                    $files          = [];
                    $template_paths = [
                        Path::clean(JPATH_SITE . '/templates/' . $template->element . '/html/layouts/' . $extension . '/field'),
                        Path::clean(JPATH_SITE . '/templates/' . $template->element . '/html/layouts/com_fields/field'),
                        Path::clean(JPATH_SITE . '/templates/' . $template->element . '/html/layouts/field'),
                    ];

                    // Add the layout options from the template paths.
                    foreach ($template_paths as $template_path) {
                        if (is_dir($template_path)) {
                            $files = array_merge($files, Folder::files($template_path, '^[^_]*\.php$', false, true));
                        }
                    }

                    foreach ($files as $i => $file) {
                        $value = basename($file, '.php');

                        // Remove the default "render.php" or layout files that exist in the component folder
                        if ($value === 'render' || in_array($value, $component_layouts)) {
                            unset($files[$i]);
                        }
                    }

                    if (count($files)) {
                        // Create the group for the template
                        $groups[$template->name]          = [];
                        $groups[$template->name]['id']    = $this->id . '_' . $template->element;
                        $groups[$template->name]['text']  = Text::sprintf('JOPTION_FROM_TEMPLATE', $template->name);
                        $groups[$template->name]['items'] = [];

                        foreach ($files as $file) {
                            // Add an option to the template group
                            $value                              = basename($file, '.php');
                            $groups[$template->name]['items'][] = HTMLHelper::_('select.option', $value, $value);
                        }
                    }
                }
            }

            // Compute attributes for the grouped list
            $attr = $this->element['size'] ? ' size="' . (int) $this->element['size'] . '"' : '';
            $attr .= $this->element['class'] ? ' class="' . (string) $this->element['class'] . '"' : '';

            // Prepare HTML code
            $html = [];

            // Compute the current selected values
            $selected = [$this->value];

            // Add a grouped list
            $html[] = HTMLHelper::_(
                'select.groupedlist',
                $groups,
                $this->name,
                ['id' => $this->id, 'group.id' => 'id', 'list.attr' => $attr, 'list.select' => $selected]
            );

            return implode($html);
        }

        return '';
    }
}