/******************************************************************************
 *                       ____    _    _____                                   *
 *                      / ___|  / \  |  ___|    C++                           *
 *                     | |     / _ \ | |_       Actor                         *
 *                     | |___ / ___ \|  _|      Framework                     *
 *                      \____/_/   \_|_|                                      *
 *                                                                            *
 * Copyright 2011-2018 Dominik Charousset                                     *
 *                                                                            *
 * Distributed under the terms and conditions of the BSD 3-Clause License or  *
 * (at your option) under the terms and conditions of the Boost Software      *
 * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
 *                                                                            *
 * If you did not receive a copy of the license files, see                    *
 * http://opensource.org/licenses/BSD-3-Clause and                            *
 * http://www.boost.org/LICENSE_1_0.txt.                                      *
 ******************************************************************************/

#pragma once

#include "caf/scheduled_actor.hpp"

#include "caf/mixin/sender.hpp"
#include "caf/mixin/requester.hpp"

namespace caf {

struct typed_actor_view_base { };

template <class... Sigs>
class typed_actor_view : public extend<typed_actor_view_base,
                                       typed_actor_view<Sigs...>>::template
                                with<mixin::sender, mixin::requester> {
public:
  /// Stores the template parameter pack.
  using signatures = detail::type_list<Sigs...>;

  typed_actor_view(scheduled_actor* ptr) : self_(ptr) {
    // nop
  }

  typed_actor_view& operator=(scheduled_actor* ptr) {
    self_ = ptr;
    return *this;
  }

  /****************************************************************************
   *                           spawn actors                                   *
   ****************************************************************************/

  template <class T, spawn_options Os = no_spawn_options, class... Ts>
  typename infer_handle_from_class<T>::type
  spawn(Ts&&... xs) {
    return self_->spawn<T, Os>(std::forward<Ts>(xs)...);
  }

  template <class T, spawn_options Os = no_spawn_options>
  infer_handle_from_state_t<T> spawn() {
    return self_->spawn<T, Os>();
  }

  template <spawn_options Os = no_spawn_options, class F, class... Ts>
  typename infer_handle_from_fun<F>::type
  spawn(F fun, Ts&&... xs) {
    return self_->spawn<Os>(std::move(fun), std::forward<Ts>(xs)...);
  }

  /****************************************************************************
   *                      miscellaneous actor operations                      *
   ****************************************************************************/

  execution_unit* context() const {
    return self_->context();
  }

  actor_system& system() const {
    return self_->system();
  }

  actor_system& home_system() const {
    return self_->home_system();
  }

  void quit(exit_reason reason = exit_reason::normal) {
    self_->quit(reason);
  }

  template <class... Ts>
  typename detail::make_response_promise_helper<Ts...>::type
  make_response_promise() {
    return self_->make_response_promise<Ts...>();
  }

  template <message_priority P = message_priority::normal, class Handle = actor>
  void monitor(const Handle& x) {
    self_->monitor<P>(x);
  }

  template <class T>
  void demonitor(const T& x) {
    self_->demonitor(x);
  }

  response_promise make_response_promise() {
    return self_->make_response_promise();
  }

  template <class... Ts,
            class R =
              typename detail::make_response_promise_helper<
                typename std::decay<Ts>::type...
              >::type>
  R response(Ts&&... xs) {
    return self_->response(std::forward<Ts>(xs)...);
  }

  /// Returns a pointer to the sender of the current message.
  /// @pre `current_mailbox_element() != nullptr`
  strong_actor_ptr& current_sender() {
    return self_->current_sender();
  }

  /// Returns a pointer to the currently processed mailbox element.
  mailbox_element* current_mailbox_element() {
    return self_->current_mailbox_element();
  }

  /// @private
  actor_control_block* ctrl() const noexcept {
    CAF_ASSERT(self_ != nullptr);
    return actor_control_block::from(self_);;
  }

  /// @private
  scheduled_actor* internal_ptr() const noexcept {
    return self_;
  }

  operator scheduled_actor*() const noexcept {
    return self_;
  }

private:
  scheduled_actor* self_;
};

} // namespace caf
