<?php

namespace BeyondCode\LaravelWebSockets\LaravelEcho\Http\Controllers;

use BeyondCode\LaravelWebSockets\ClientProviders\Client;
use Exception;
use Illuminate\Http\Request;
use GuzzleHttp\Psr7 as gPsr;
use GuzzleHttp\Psr7\Response;
use Ratchet\ConnectionInterface;
use Illuminate\Http\JsonResponse;
use GuzzleHttp\Psr7\ServerRequest;
use Ratchet\Http\HttpServerInterface;
use Psr\Http\Message\RequestInterface;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Bridge\PsrHttpMessage\Factory\HttpFoundationFactory;
use BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Channels\ChannelManager;

abstract class EchoController implements HttpServerInterface
{
    /** @var \BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Channels\ChannelManager */
    protected $channelManager;

    public function __construct(ChannelManager $channelManager)
    {
        $this->channelManager = $channelManager;
    }

    public function onOpen(ConnectionInterface $connection, RequestInterface $request = null)
    {
        $queryParameters = [];
        parse_str($request->getUri()->getQuery(), $queryParameters);

        $serverRequest = (new ServerRequest(
            $request->getMethod(),
            $request->getUri(),
            $request->getHeaders(),
            $request->getBody(),
            $request->getProtocolVersion()
        ))->withQueryParams($queryParameters);

        $laravelRequest = Request::createFromBase((new HttpFoundationFactory)->createRequest($serverRequest));

        $this->verifyAppId($laravelRequest->appId);

        $response = $this($laravelRequest);

        $connection->send(JsonResponse::create($response)->send());
        $connection->close();
    }

    function onMessage(ConnectionInterface $from, $msg)
    {
    }

    function onClose(ConnectionInterface $connection)
    {
    }

    function onError(ConnectionInterface $connection, Exception $exception)
    {
        if ($exception instanceof HttpException) {
            $response = new Response($exception->getStatusCode(), [
                'Content-Type' => 'application/json'
            ], json_encode([
                'error' => $exception->getMessage()
            ]));

            $connection->send(gPsr\str($response));
            $connection->close();
        }
    }

    public function verifyAppId(string $appId)
    {
        if ($client = Client::findByAppId($appId)) {
             return;
        }

        throw new HttpException(401, "Unknown app id `{$appId}` provided.");
    }

    abstract public function __invoke(Request $request);
}