<?php

declare(strict_types = 1);

namespace Wyomind\ElasticsearchCore\Elasticsearch\Endpoints;

use Wyomind\ElasticsearchCore\Elasticsearch\Common\Exceptions;

/**
 * Class Scroll
 *
 * @category Wyomind\Elasticsearch
 * @package  Wyomind\ElasticsearchCore\Elasticsearch\Endpoints
 * @author   Zachary Tong <zach@elastic.co>
 * @license  http://www.apache.org/licenses/LICENSE-2.0 Apache2
 * @link     http://elastic.co
 */
class Scroll extends AbstractEndpoint
{
    protected $scrollId;

    public function setBody($body): Scroll
    {
        if (isset($body) !== true) {
            return $this;
        }

        $this->body = $body;

        return $this;
    }

    /**
     * @return $this
     */
    public function setScrollId(?string $scrollId): Scroll
    {
        if ($scrollId !== null) {
            $this->scrollId = $scrollId;
        }
        return $this;
    }

    public function getURI(): string
    {
        $scrollId = $this->scrollId ?? null;

        if (isset($scrollId)) {
            return "/_search/scroll/$scrollId";
        }

        return "/_search/scroll";
    }

    public function getParamWhitelist(): array
    {
        return [
            'scroll',
            'scroll_id',
            'rest_total_hits_as_int'
        ];
    }

    public function getMethod(): string
    {
        return isset($this->body) ? 'POST' : 'GET';
    }
}
