/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
 *
 * Distributed under the Boost Software License, Version 1.0. (See
 * accompanying file LICENSE.txt)
 */

#include <boost/redis/connection.hpp>

#include <boost/asio/cancel_after.hpp>
#include <boost/asio/co_spawn.hpp>
#include <boost/asio/consign.hpp>
#include <boost/asio/detached.hpp>

#include <iostream>

#if defined(BOOST_ASIO_HAS_CO_AWAIT)

namespace asio = boost::asio;
using boost::redis::request;
using boost::redis::response;
using boost::redis::config;
using boost::redis::connection;
using namespace std::chrono_literals;

// Called from the main function (see main.cpp)
auto co_main(config cfg) -> asio::awaitable<void>
{
   auto conn = std::make_shared<connection>(co_await asio::this_coro::executor);
   conn->async_run(cfg, asio::consign(asio::detached, conn));

   // A request containing only a ping command.
   request req;
   req.push("PING", "Hello world");

   // Response where the PONG response will be stored.
   response<std::string> resp;

   // Executes the request with a timeout. If the server is down,
   // async_exec will wait until it's back again, so it,
   // may suspend for a long time.
   // For this reason, it's good practice to set a timeout to requests with cancel_after.
   // If the request hasn't completed after 10 seconds, an exception will be thrown.
   co_await conn->async_exec(req, resp, asio::cancel_after(10s));
   conn->cancel();

   std::cout << "PING: " << std::get<0>(resp).value() << std::endl;
}

#endif  // defined(BOOST_ASIO_HAS_CO_AWAIT)