<?php

/**
 * REST point for overwrite subsites
 *
 * @package Duplicator
 * @copyright (c) 2021, Snapcreek LLC
 *
 */

namespace Duplicator\RESTPoints;

use DUP_PRO_Log;
use Duplicator\Libs\Snap\SnapLog;
use Duplicator\Libs\Snap\SnapURL;
use Duplicator\Libs\Snap\SnapUtil;
use Exception;

class SubsiteActions extends \Duplicator\Core\REST\AbstractRESTPoint
{
    /**
     * return REST point route string
     *
     * @return string
     */
    protected function getRoute()
    {
        return '/multisite/subsite/actions';
    }

    /**
     * True if REST point is avaiable
     *
     * @return boolean
     */
    public function isEnable()
    {
        return is_multisite();
    }

    /**
     * avaiable methods
     *
     * @return string[]
     */
    public function getMethods()
    {
        return array('GET', 'POST');
    }

    /**
     * current user permission check
     *
     * @param \WP_REST_Request $request request data
     * @return void
     */
    public function permission(\WP_REST_Request $request)
    {
        if (!current_user_can('import') || !is_super_admin() || !check_ajax_referer('wp_rest', false, false)) {
            return new \WP_Error('rest_forbidden', esc_html__('You cannot execute this action.'));
        }
        return true;
    }

    /**
     * REST point arguments
     *
     * @return array
     */
    protected function getArgs()
    {
        return array(
            'data' => array(
                'required'          => true,
                'type'              => 'string',
                'description'       => 'Subsite overwrite mapping',
                'validate_callback' => function ($param, \WP_REST_Request $request, $key) {
                    $param = json_decode($param, true);
                    if (!is_array($param)) {
                        return false;
                    }

                    foreach ($param as $item) {
                        if (!isset($item['sourceId']) || !is_int($item['sourceId'])) {
                            return false;
                        }
                        if (!isset($item['targetId']) || !is_int($item['targetId'])) {
                            return false;
                        }
                        if (!isset($item['newSlug'])  || !is_string($item['newSlug'])) {
                            return false;
                        }
                        if (!isset($item['blogName'])  || !is_string($item['blogName'])) {
                            return false;
                        }
                        if ($item['targetId'] == 0 && strlen('newSlug') == 0) {
                            return false;
                        }
                        if ($item['targetId'] > 0 && get_site($item['targetId']) == null) {
                            return false;
                        }
                    }
                    return true;
                }
            )
        );
    }

    /**
     * REST poing logic
     *
     * @param \WP_REST_Request $request      REQUEST data
     * @param array            $responseBase response base data
     *
     * @return \WP_REST_Response
     */
    protected function respond(\WP_REST_Request $request, $responseBase)
    {
        $response                 = $responseBase;
        $response['subsitesInfo'] = array();

        if (!class_exists('WP_Network')) {
            throw new Exception('the current version of wordpress does not support this action.');
        }

        $data = json_decode($request->get_param('data'), true);
        if (!is_array($data)) {
            throw new Exception('Can\'t decode data');
        }

        DUP_PRO_Log::trace('PARAM DATA ' . SnapLog::v2str($data));
        $currentUserId = get_current_user_id();

        foreach ($data as $subsiteInfo) {
            if ($subsiteInfo['targetId'] > 0) {
                self::addUserAdminAtSubsite($subsiteInfo['targetId']);
                if (($info = \DUP_PRO_MU::getSubsiteInfoById($subsiteInfo['targetId'])) == false) {
                    throw new Exception('Already exists subsite errorL Can\'t read new subsite info ID: ' . $subsiteInfo['targetId']);
                }
            } else {
                $newBlogId = self::createNewSubsite($subsiteInfo['newSlug'], $subsiteInfo['blogName'], $currentUserId);
                if (($info = \DUP_PRO_MU::getSubsiteInfoById($newBlogId)) == false) {
                    throw new Exception('Create subsite error: Can\'t read new subsite info ID: ' . $newBlogId);
                }
            }

            $subsiteInfo['info']        = $info;
            $response['subsitesInfo'][] = $subsiteInfo;
        }

        $response['success'] = true;

        return new \WP_REST_Response($response, 200);
    }

    /**
     * Add current logged in user at subsite id
     *
     * @param int $blogId blog id
     *
     * @return bool
     */
    protected static function addUserAdminAtSubsite($blogId)
    {
        $userId = get_current_user_id();

        if (is_user_member_of_blog($userId, $blogId)) {
            return true;
        }

        $result = add_user_to_blog($blogId, $userId, 'administrator');
        if ($result instanceof \WP_Error) {
            throw new \Exception($result->get_error_message());
        }

        return true;
    }

    /**
     * Create new subsite
     *
     * @param string $newSlug     subsite slug
     * @param string $blogTitle   blog title
     * @param int    $adminUserId admin user
     *
     * @return int return new subsite id
     */
    protected static function createNewSubsite($newSlug, $blogTitle, $adminUserId)
    {
        $networkId = function_exists('get_current_network_id') ? get_current_network_id() : 1;
        $wpNetwork = \WP_Network::get_instance($networkId);

        if (defined('SUBDOMAIN_INSTALL') && SUBDOMAIN_INSTALL) {
            $domain = $newSlug . '.' . SnapURL::wwwRemove($wpNetwork->domain);
            $path   = $wpNetwork->path;
        } else {
            $domain = $wpNetwork->domain;
            $path   = trailingslashit($wpNetwork->path) . $newSlug;
        }

        $newBlogId = wpmu_create_blog($domain, $path, $blogTitle, $adminUserId);

        if ($newBlogId instanceof \WP_Error) {
            throw new Exception($newBlogId->get_error_message());
        }

        return $newBlogId;
    }
}
