// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.

#define CAF_SUITE io.remote_group

#include "caf/config.hpp"

#include "io-test.hpp"

#include <algorithm>
#include <vector>

#include "caf/all.hpp"
#include "caf/io/all.hpp"

using namespace caf;

namespace {

class config : public caf::actor_system_config {
public:
  config() {
    load<caf::io::middleman>();
  }
};

const uint16_t port = 8080;

const char* server = "mars";

const char* group_name = "foobar";

size_t received_messages = 0u;

behavior group_receiver(event_based_actor* self) {
  self->set_default_handler(reflect_and_quit);
  return {
    [](ok_atom) { ++received_messages; },
  };
}

// Our server is `mars` and our client is `earth`.
struct fixture : point_to_point_fixture<test_coordinator_fixture<config>> {
  fixture() {
    prepare_connection(mars, earth, server, port);
  }

  ~fixture() {
    for (auto& receiver : receivers)
      anon_send_exit(receiver, exit_reason::user_shutdown);
  }

  void spawn_receivers(planet_type& planet, group grp, size_t count) {
    for (size_t i = 0; i < count; ++i)
      receivers.emplace_back(planet.sys.spawn_in_group(grp, group_receiver));
  }

  std::vector<actor> receivers;
};

} // namespace

CAF_TEST_FIXTURE_SCOPE(dynamic_remote_group_tests, fixture)

CAF_TEST(publish_local_groups) {
  loop_after_next_enqueue(mars);
  CAF_CHECK_EQUAL(mars.sys.middleman().publish_local_groups(port), port);
}

CAF_TEST(connecting to remote group) {
  CAF_MESSAGE("publish local groups on mars");
  loop_after_next_enqueue(mars);
  CAF_CHECK_EQUAL(mars.sys.middleman().publish_local_groups(port), port);
  CAF_MESSAGE("call remote_group on earth");
  loop_after_next_enqueue(earth);
  auto grp = unbox(earth.mm.remote_group(group_name, server, port));
  CAF_REQUIRE(grp != nullptr);
  CAF_CHECK_EQUAL(grp->get()->identifier(), group_name);
}

CAF_TEST(message transmission) {
  CAF_MESSAGE("spawn 5 receivers on mars");
  auto mars_grp = mars.sys.groups().get_local(group_name);
  spawn_receivers(mars, mars_grp, 5u);
  CAF_MESSAGE("publish local groups on mars");
  loop_after_next_enqueue(mars);
  CAF_CHECK_EQUAL(mars.sys.middleman().publish_local_groups(port), port);
  CAF_MESSAGE("call remote_group on earth");
  loop_after_next_enqueue(earth);
  auto earth_grp = unbox(earth.mm.remote_group(group_name, server, port));
  CAF_MESSAGE("spawn 5 more receivers on earth");
  spawn_receivers(earth, earth_grp, 5u);
  exec_all();
  CAF_MESSAGE("send message on mars and expect 10 handled messages total");
  {
    received_messages = 0u;
    mars.self->send(mars_grp, ok_atom_v);
    exec_all();
    CAF_CHECK_EQUAL(received_messages, 10u);
  }
  CAF_MESSAGE("send message on earth and again expect 10 handled messages");
  {
    received_messages = 0u;
    earth.self->send(earth_grp, ok_atom_v);
    exec_all();
    CAF_CHECK_EQUAL(received_messages, 10u);
  }
}

CAF_TEST_FIXTURE_SCOPE_END()