<?php

namespace Lackoxygen\GzCbec\Request;

use Carbon\Carbon;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Lackoxygen\GzCbec\Constant\XML;
use Lackoxygen\GzCbec\Contract\RequestInterface;
use Lackoxygen\GzCbec\Contract\XMLInterface;
use Lackoxygen\GzCbec\Exception\Exception;
use Lackoxygen\GzCbec\Request\Head\Head;
use Lackoxygen\GzCbec\Request\Packet\GzReportTransfer;
use Lackoxygen\GzCbec\Request\Report\Node\Receiver;
use Lackoxygen\GzCbec\Utils\RSA;
use Lackoxygen\GzCbec\Utils\Signature;

class Packet
{
    /**
     * @var RequestInterface $request
     */
    protected $request;

    /**
     * @var array
     */
    protected $config = [];

    /**
     * Packet constructor.
     *
     * @param RequestInterface $request
     */
    public function __construct(RequestInterface $request)
    {
        $this->request = $request;

        $this->config = config('gz-cbec');
    }


    /**
     * @return string
     */
    public function getContent(): string
    {
        try {
            $head = new Head();
            $head->setMessageId($this->request->getGuid());
            $head->setMessageType($this->request->getMessageType());
            $head->setSender($this->config['sender_sn']);
            $receiver = new Receiver();
            $receiver->setReceiver($this->config['receiver_sn']);
            $head->pushReceivers($receiver);
            $head->setSendTime(Carbon::now()->getPreciseTimestamp(4));
            $head->setVersion($this->request->getVersion());
            $head->setFileName('');
            $head->setZipFlag(0);
            $packet = new GzReportTransfer();
            $packet->setHead($head);
            if ($this->request instanceof XMLInterface) {
                $firstLabel = $this->request->getFirstLabelPrefix() . ':' . $this->request->getFirstLabelName();
                $xmlHead    = sprintf(XML::DATA, $firstLabel, $this->request->getGuid(), $this->request->getVersion(),
                    $firstLabel);
                $dataXml    = $this->request->toXML($xmlHead);
                $data = base64_encode($dataXml);
                $packet->setData($data);
            }
            $xml = $packet->toXML(XML::TRANSFER);

            return $this->signature($xml);
        } catch (Exception $exception) {
            return '';
        }
    }

    /**
     * @param string $signXml
     *
     * @return string
     */
    protected function signature(string $signXml): string
    {
        $signature = Arr::get($this->config, 'signature');

        if ($signature instanceof \Closure) {
            $afterSignXml = call_user_func($signature, $signXml);
            if (!is_null($afterSignXml)) {
                return $afterSignXml;
            }
        } else {
            return (new Signature($signature))($signXml);
        }

        return "";
    }
}