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<?php

    namespace Donut\Facebook;

    use Donut\IWorker;
    use Donut\Message;
    use Donut\Manager;


    class PublishFacebookPost implements IWorker
    {
        /** @var FacebookApi */
        private $facebookApi;


        public function __construct(FacebookApi $facebookApi)
        {
            $this->facebookApi = $facebookApi;
        }


        /**
         * @return void
         */
        public function processMessage(Message $message, Manager $manager)
        {
            $fbPost = FacebookPost::fromArray($message->getData());
            $gallery = $fbPost->getGallery();
            $data = array();

            if ($fbPost->getMessage() !== NULL) {
                $data['message'] = $fbPost->getMessage();
            }

            if ($fbPost->getLink() !== NULL) {
                $data['link'] = $fbPost->getLink();

                if ($fbPost->getGallery() !== NULL) {
                    $limit = 5;
                    foreach ($fbPost->getGallery() as $galleryPhoto) {
                        $data['child_attachments'][] = array(
                            'link' => $fbPost->getLink(),
                            'picture' => $galleryPhoto,
                        );

                        $limit--;

                        if ($limit < 1) {
                            break;
                        }
                    }

                    if (isset($data['child_attachments']) && count($data['child_attachments']) < 2) {
                        unset($data['child_attachments']);
                    }
                }
            }

            if (empty($data)) {
                throw new \Donut\InvalidStateException('Empty fbPost, missing message and link');
            }

            if ($fbPost->getPicture() !== NULL) {
                // $data['picture'] = $fbPost->getPicture();
            }

            $data['access_token'] = $this->facebookApi->getAccessToken();
            $fbNode = '/' . $this->facebookApi->getAccountId() . '/feed';

            $facebook = $this->facebookApi->getFacebook();
            $facebook->post($fbNode, $data);
        }
    }