// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_PUBLIC_WEB_MODULES_MEDIASTREAM_WEB_MEDIA_STREAM_DEVICE_OBSERVER_H_
#define THIRD_PARTY_BLINK_PUBLIC_WEB_MODULES_MEDIASTREAM_WEB_MEDIA_STREAM_DEVICE_OBSERVER_H_

#include <memory>

#include "base/unguessable_token.h"
#include "third_party/blink/public/common/mediastream/media_stream_request.h"
#include "third_party/blink/public/platform/web_common.h"
#include "third_party/blink/public/platform/web_string.h"

namespace blink {

namespace mojom::blink {
class StreamDevicesSet;
}

class MediaStreamDeviceObserver;
class WebLocalFrame;

class BLINK_MODULES_EXPORT WebMediaStreamDeviceObserver {
 public:
  explicit WebMediaStreamDeviceObserver(WebLocalFrame* frame);
  ~WebMediaStreamDeviceObserver();

  MediaStreamDevices GetNonScreenCaptureDevices();

  using OnDeviceStoppedCb =
      base::RepeatingCallback<void(const MediaStreamDevice& device)>;
  using OnDeviceChangedCb =
      base::RepeatingCallback<void(const MediaStreamDevice& old_device,
                                   const MediaStreamDevice& new_device)>;
  using OnDeviceRequestStateChangeCb = base::RepeatingCallback<void(
      const MediaStreamDevice& device,
      const mojom::MediaStreamStateChange new_state)>;
  using OnDeviceCaptureConfigurationChangeCb =
      base::RepeatingCallback<void(const MediaStreamDevice& device)>;
  using OnDeviceCaptureHandleChangeCb =
      base::RepeatingCallback<void(const MediaStreamDevice& device)>;
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
  using OnZoomLevelChangeCb =
      base::RepeatingCallback<void(const MediaStreamDevice& device,
                                   int zoom_level)>;
#endif

  struct StreamCallbacks {
    OnDeviceStoppedCb on_device_stopped_cb;
    OnDeviceChangedCb on_device_changed_cb;
    OnDeviceRequestStateChangeCb on_device_request_state_change_cb;
    OnDeviceCaptureConfigurationChangeCb
        on_device_capture_configuration_change_cb;
    OnDeviceCaptureHandleChangeCb on_device_capture_handle_change_cb;
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
    OnZoomLevelChangeCb on_zoom_level_change_cb;
#endif
  };

  void AddStreams(const WebString& label,
                  const mojom::blink::StreamDevicesSet& stream_devices_set,
                  const StreamCallbacks& stream_callbacks);
  void AddStream(const WebString& label, const MediaStreamDevice& device);
  bool RemoveStreams(const WebString& label);
  void RemoveStreamDevice(const MediaStreamDevice& device);

  // Get the video session_id given a label. The label identifies a stream.
  base::UnguessableToken GetVideoSessionId(const WebString& label);
  // Returns an audio session_id given a label.
  base::UnguessableToken GetAudioSessionId(const WebString& label);

 private:
  std::unique_ptr<MediaStreamDeviceObserver> observer_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_PUBLIC_WEB_MODULES_MEDIASTREAM_WEB_MEDIA_STREAM_DEVICE_OBSERVER_H_