<?php

/**
 * @package     Joomla.API
 * @subpackage  com_templates
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Templates\Api\Controller;

use Joomla\CMS\MVC\Controller\ApiController;
use Joomla\String\Inflector;
use Tobscure\JsonApi\Exception\InvalidParameterException;

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

/**
 * The styles controller
 *
 * @since  4.0.0
 */
class StylesController extends ApiController
{
    /**
     * The content type of the item.
     *
     * @var    string
     * @since  4.0.0
     */
    protected $contentType = 'styles';

    /**
     * The default view for the display method.
     *
     * @var    string
     * @since  3.0
     */
    protected $default_view = 'styles';

    /**
     * Basic display of an item view
     *
     * @param   integer  $id  The primary key to display. Leave empty if you want to retrieve data from the request
     *
     * @return  static  A \JControllerLegacy object to support chaining.
     *
     * @since   4.0.0
     */
    public function displayItem($id = null)
    {
        $this->modelState->set('client_id', $this->getClientIdFromInput());

        return parent::displayItem($id);
    }

    /**
     * Basic display of a list view
     *
     * @return  static  A \JControllerLegacy object to support chaining.
     *
     * @since   4.0.0
     */
    public function displayList()
    {
        $this->modelState->set('client_id', $this->getClientIdFromInput());

        return parent::displayList();
    }

    /**
     * Method to allow extended classes to manipulate the data to be saved for an extension.
     *
     * @param   array  $data  An array of input data.
     *
     * @return  array
     *
     * @since   4.0.0
     * @throws  InvalidParameterException
     */
    protected function preprocessSaveData(array $data): array
    {
        $data['client_id'] = $this->getClientIdFromInput();

        // If we are updating an item the template is a readonly property based on the ID
        if ($this->input->getMethod() === 'PATCH') {
            if (\array_key_exists('template', $data)) {
                throw new InvalidParameterException('The template property cannot be modified for an existing style');
            }

            $model = $this->getModel(Inflector::singularize($this->contentType), '', ['ignore_request' => true]);
            $data['template'] = $model->getItem($this->input->getInt('id'))->template;
        }

        return $data;
    }

    /**
     * Get client id from input
     *
     * @return string
     *
     * @since 4.0.0
     */
    private function getClientIdFromInput()
    {
        return $this->input->exists('client_id') ? $this->input->get('client_id') : $this->input->post->get('client_id');
    }
}
