<?php

/**
 * Copyright (c) 2015-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to
 * use, copy, modify, and distribute this software in source code or binary
 * form for use in connection with the web services and APIs provided by
 * Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use
 * of this software is subject to the Facebook Developer Principles and
 * Policies [http://developers.facebook.com/policy/]. This copyright notice
 * shall be included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 */
namespace PixelCaffeine\Dependencies\FacebookAds\Object\ServerSide;

use PixelCaffeine\Dependencies\GuzzleHttp\Promise;
class BatchProcessor
{
    protected $batch_size;
    protected $concurrent_requests;
    protected $pixel_id;
    /**
     * Constructor
     * @param int $pixel_id
     * @param int $batch_size
     * @param int $concurrent_requests
     */
    public function __construct($pixel_id, $batch_size = 50, $concurrent_requests = 4)
    {
        $this->pixel_id = $pixel_id;
        // Note: batch_size is only used in processEvents and processEventsGenerator
        $this->batch_size = $batch_size;
        $this->concurrent_requests = $concurrent_requests;
    }
    /**
     * Processes events that have identical event_request params
     * @param array $event_request_params
     * @param array|\FacebookAds\Object\ServerSide\Event $events
     * @return void
     */
    public function processEvents($event_request_params, $events)
    {
        $generator = $this->processEventsGenerator($event_request_params, $events);
        foreach ($generator as $promises) {
            \PixelCaffeine\Dependencies\GuzzleHttp\Promise\unwrap($promises);
        }
    }
    /**
     * This generator returns event_requests promises for events that have identical event_request params
     * @param array $event_request_params
     * @param array|\FacebookAds\Object\ServerSide\Event $events
     * @return Generator|array|\GuzzleHttp\Promise\PromiseInterface $promises
     */
    public function processEventsGenerator($event_request_params, $events)
    {
        $index = 0;
        while ($index < \count($events)) {
            $promises = [];
            while ($index < \count($events) && \count($promises) < $this->concurrent_requests) {
                $params = \array_merge(array('events' => \array_slice($events, $index, $this->batch_size)), $event_request_params);
                $event_request = new \PixelCaffeine\Dependencies\FacebookAds\Object\ServerSide\EventRequestAsync($this->pixel_id, $params);
                $promises[] = $event_request->execute();
                $index += $this->batch_size;
            }
            (yield $promises);
        }
    }
    /**
     * Processes async event_requests
     * @param array|\FacebookAds\Object\ServerSide\EventRequestAsync $event_requests_async
     * @return void
     */
    public function processEventRequests($event_requests_async)
    {
        $generator = $this->processEventRequestsGenerator($event_requests_async);
        foreach ($generator as $promises) {
            \PixelCaffeine\Dependencies\GuzzleHttp\Promise\unwrap($promises);
        }
    }
    /**
     * This generator returns event_requests promises
     * @param array|\FacebookAds\Object\ServerSide\EventRequestAsync $event_requests_async
     * @return Generator|array|\GuzzleHttp\Promise\PromiseInterface $promises
     */
    public function processEventRequestsGenerator($event_requests_async)
    {
        $index = 0;
        while ($index < \count($event_requests_async)) {
            $promises = [];
            $offset = 0;
            while ($index + $offset < \count($event_requests_async) && \count($promises) < $this->concurrent_requests) {
                $promises[] = $event_requests_async[$index + $offset]->execute();
                $offset += 1;
            }
            $index += $offset;
            (yield $promises);
        }
    }
}
