<?php

namespace App\EventSubscriber;

use ApiPlatform\Symfony\EventListener\EventPriorities;
use App\Entity\Order;
use App\Repository\ProductRepository;
use App\Repository\StockRepository;
use App\Repository\WarehouseRepository;
use Maknz\Slack\Client;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Event\ViewEvent;
use Symfony\Component\HttpKernel\KernelEvents;


class SlackNotifySubscriber implements EventSubscriberInterface
{
    /**
     * @var Slack
     */
    private $slackWebhookUrl;
    private $productRepository;
    private $stockRepository;
    private $warehouseRepository;

    public function __construct(string $slackWebhookUrl, ProductRepository $productRepository, StockRepository $stockRepository, WarehouseRepository $warehouseRepository)
    {
        $this->slackWebhookUrl = $slackWebhookUrl;
        $this->productRepository = $productRepository;
        $this->stockRepository = $stockRepository;
        $this->warehouseRepository = $warehouseRepository;
    }

    public static function getSubscribedEvents(): array
    {
        return [
            KernelEvents::VIEW => ['sendSlack', EventPriorities::POST_WRITE],
        ];
    }


    /**
     * @param ViewEvent $event
     * @return void
     */
    public function sendSlack(ViewEvent $event): void
    {

        $order = $event->getControllerResult();
        $method = $event->getRequest()->getMethod();

        //wenn es keine Bestellung ist oder es kein POST Request ist, dann return
        if (!$order instanceof Order || Request::METHOD_POST !== $method) {
            return;
        }

        foreach ($order->getData()[0]['positions'] as $item) {
            if ($item['menge'] > 0) {

                $warehouse = $this->getWarehouseByGtin($item['gtin']);

                $slack = new Client($this->slackWebhookUrl, [
                    'username' => 'CDS-Notify',
                    'channel' => '#online_verkäufe' . '_' . $warehouse,
                    'link_names' => true,
                    'icon' => ':robot_face:',
                    'allow_markdown' => true,
                ]);

                $msg = "Bestellung {$order->getOrderId()}: \n";
                $msg .= $item['marke'];
                $msg .= $item['name'];
                $msg .= ' ' . $item['han'];
                $msg .= ' *Menge: ' . $item['menge'] . "* \n";

                if ($order->getStatus() == 1) {
                    $slack->from('CDS-Notify')->send($msg);
                }
            }
        }
    }

    /**
     * @param string $gtin
     * @return string|null
     */
    private function getWarehouseByGtin(string $gtin)
    {
        if ($gtin == null) {
            return false;
        }

        $product = $this->productRepository->findOneBy(['gtin' => $gtin]);

        if ($product) {
            $stock = $this->stockRepository->findOneBy(['product_id' => $product->getId()]);

            if ($stock) {
                $warehouse = $this->warehouseRepository->findOneBy(['id' => $stock->getWarehouse()->getId()]);
                return $warehouse->getName();
            }
        }

        return null;

    }
}