/*
 * TestEventNotifier.cpp
 *
 *  Created on: Jun 19, 2018
 *      Author: Andreas Schneider, Johannes Wendel, Jonas Zeunert, Rafael Vinci, Dr. Franca Rupprecht
 */


#include "catch.hpp"
#include "fakeit.hpp"
#include "utilities/LoggerFactory.hpp"
#include "utilities/IEventHandler.h"


// testing purposes
#define private public

#include "input/EventNotifier.h"

using namespace Input;
using namespace fakeit;

SCENARIO("An EventNotifier gets created", "[construction]")
{
  LoggerFactory::CreateInputLogger();

  WHEN("The EventNotifier gets created")
  {
    EventNotifier notifier;
    THEN("It sets the running variable to true")
    {
      REQUIRE(notifier.is_running);
    }
    THEN("It creates a notify thread")
    {
      REQUIRE(typeid(notifier.notify_thread).hash_code() == typeid(std::thread).hash_code());
    }
  }
}

SCENARIO("An EventHandler gets [un]registered at the notifier", "[un-register notifier]")
{
  GIVEN("An EventHandler")
  {
    LoggerFactory::CreateInputLogger();

    Mock<IEventHandler> event_handler_mock;
    Fake(Method(event_handler_mock, handle));
    Fake(Dtor(event_handler_mock));

    EventNotifier notifier;

    WHEN("The EventHandler gets registered at the eventNotifier")
    {
      notifier.register_event_handler(&event_handler_mock.get());

      THEN("The EventHandler gets saved")
      {
        REQUIRE(*(notifier.event_handler.find(&event_handler_mock.get())) == &event_handler_mock.get());
      }
    }

    WHEN("The EventHandler gets unregistered at the driver")
    {
      REQUIRE(!notifier.event_handler.empty());

      notifier.unregister_event_handler(&event_handler_mock.get());

      THEN("The unregister_event_handler at the event_notifier gets called")
      {
        REQUIRE(notifier.event_handler.empty());
      }
    }
  }
}

SCENARIO("An event should be distributed", "[distribute]")
{
  GIVEN("An event")
  {
    Event event(0, 0, "test");

    EventNotifier notifier;
    WHEN("The event comes in")
    {
      notifier.distribute_event(event);
      THEN("The event gets queued")
      {
        REQUIRE(!notifier.event_queue.p_queue.empty());
      }
    }
  }
}

SCENARIO("The EventHandler gets notified")
{
  GIVEN("An Event and an EventHandler")
  {
    Event event(0, 0, "test");

    Mock<IEventHandler> event_handler_mock;
    Fake(Method(event_handler_mock, handle));
    Fake(Dtor(event_handler_mock));

    EventNotifier notifier;


    WHEN("The event gets queued")
    {
      notifier.event_queue.push(event);

      std::this_thread::sleep_for(std::chrono::milliseconds(50));
      THEN("The EventHandler gets called")
      {
        REQUIRE((bool) Verify(Method(event_handler_mock, handle)));
      }
    }
  }
}