/*
 *  Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#ifndef TEST_TIME_CONTROLLER_SIMULATED_THREAD_H_
#define TEST_TIME_CONTROLLER_SIMULATED_THREAD_H_

#include <memory>

#include "test/time_controller/simulated_time_controller.h"

namespace webrtc {

class SimulatedThread : public rtc::Thread,
                        public sim_time_impl::SimulatedSequenceRunner {
 public:
  class CurrentThreadSetter : CurrentTaskQueueSetter {
   public:
    explicit CurrentThreadSetter(Thread* thread)
        : CurrentTaskQueueSetter(thread),
          manager_(rtc::ThreadManager::Instance()),
          previous_(manager_->CurrentThread()) {
      manager_->ChangeCurrentThreadForTest(thread);
    }
    ~CurrentThreadSetter() { manager_->ChangeCurrentThreadForTest(previous_); }

   private:
    rtc::ThreadManager* const manager_;
    rtc::Thread* const previous_;
  };
  SimulatedThread(sim_time_impl::SimulatedTimeControllerImpl* handler,
                  absl::string_view name,
                  std::unique_ptr<rtc::SocketServer> socket_server);
  ~SimulatedThread() override;

  void RunReady(Timestamp at_time) override;

  Timestamp GetNextRunTime() const override {
    rtc::CritScope lock(&lock_);
    return next_run_time_;
  }

  TaskQueueBase* GetAsTaskQueue() override { return this; }

  // Thread interface
  void Send(const rtc::Location& posted_from,
            rtc::MessageHandler* phandler,
            uint32_t id,
            rtc::MessageData* pdata) override;
  void Post(const rtc::Location& posted_from,
            rtc::MessageHandler* phandler,
            uint32_t id,
            rtc::MessageData* pdata,
            bool time_sensitive) override;
  void PostDelayed(const rtc::Location& posted_from,
                   int delay_ms,
                   rtc::MessageHandler* phandler,
                   uint32_t id,
                   rtc::MessageData* pdata) override;
  void PostAt(const rtc::Location& posted_from,
              int64_t target_time_ms,
              rtc::MessageHandler* phandler,
              uint32_t id,
              rtc::MessageData* pdata) override;

  void Stop() override;

 private:
  sim_time_impl::SimulatedTimeControllerImpl* const handler_;
  // Using char* to be debugger friendly.
  char* name_;
  rtc::CriticalSection lock_;
  Timestamp next_run_time_ RTC_GUARDED_BY(lock_) = Timestamp::PlusInfinity();
};

class SimulatedMainThread : public SimulatedThread {
 public:
  explicit SimulatedMainThread(
      sim_time_impl::SimulatedTimeControllerImpl* handler);
  ~SimulatedMainThread();

 private:
  CurrentThreadSetter current_setter_;
};
}  // namespace webrtc
#endif  // TEST_TIME_CONTROLLER_SIMULATED_THREAD_H_