/*
 *  Copyright 2018 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 EXAMPLES_OBJCNATIVEAPI_OBJCCALLCLIENT_H_
#define EXAMPLES_OBJCNATIVEAPI_OBJCCALLCLIENT_H_

#include <memory>
#include <string>

#import "sdk/objc/base/RTCMacros.h"

#include "api/environment/environment.h"
#include "api/peer_connection_interface.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "rtc_base/synchronization/mutex.h"

@class RTC_OBJC_TYPE(RTCVideoCapturer);
@protocol RTC_OBJC_TYPE
(RTCVideoRenderer);

namespace webrtc_examples {

class ObjCCallClient {
 public:
  ObjCCallClient();

  void Call(RTC_OBJC_TYPE(RTCVideoCapturer) * capturer,
            id<RTC_OBJC_TYPE(RTCVideoRenderer)> remote_renderer);
  void Hangup();

 private:
  class PCObserver : public webrtc::PeerConnectionObserver {
   public:
    explicit PCObserver(ObjCCallClient* client);

    void OnSignalingChange(
        webrtc::PeerConnectionInterface::SignalingState new_state) override;
    void OnDataChannel(webrtc::scoped_refptr<webrtc::DataChannelInterface>
                           data_channel) override;
    void OnRenegotiationNeeded() override;
    void OnIceConnectionChange(
        webrtc::PeerConnectionInterface::IceConnectionState new_state) override;
    void OnIceGatheringChange(
        webrtc::PeerConnectionInterface::IceGatheringState new_state) override;
    void OnIceCandidate(const webrtc::IceCandidate* candidate) override;

   private:
    ObjCCallClient* const client_;
  };

  void CreatePeerConnectionFactory() RTC_RUN_ON(thread_checker_);
  void CreatePeerConnection() RTC_RUN_ON(thread_checker_);
  void Connect() RTC_RUN_ON(thread_checker_);

  webrtc::Environment env_;
  webrtc::SequenceChecker thread_checker_;

  bool call_started_ RTC_GUARDED_BY(thread_checker_);

  const std::unique_ptr<PCObserver> pc_observer_;

  webrtc::scoped_refptr<webrtc::PeerConnectionFactoryInterface> pcf_
      RTC_GUARDED_BY(thread_checker_);
  std::unique_ptr<webrtc::Thread> network_thread_
      RTC_GUARDED_BY(thread_checker_);
  std::unique_ptr<webrtc::Thread> worker_thread_
      RTC_GUARDED_BY(thread_checker_);
  std::unique_ptr<webrtc::Thread> signaling_thread_
      RTC_GUARDED_BY(thread_checker_);

  std::unique_ptr<webrtc::VideoSinkInterface<webrtc::VideoFrame>> remote_sink_
      RTC_GUARDED_BY(thread_checker_);
  webrtc::scoped_refptr<webrtc::VideoTrackSourceInterface> video_source_
      RTC_GUARDED_BY(thread_checker_);

  webrtc::Mutex pc_mutex_;
  webrtc::scoped_refptr<webrtc::PeerConnectionInterface> pc_
      RTC_GUARDED_BY(pc_mutex_);
};

}  // namespace webrtc_examples

#endif  // EXAMPLES_OBJCNATIVEAPI_OBJCCALLCLIENT_H_