/*
 *  Copyright (c) 2019 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_PC_E2E_NETWORK_QUALITY_METRICS_REPORTER_H_
#define TEST_PC_E2E_NETWORK_QUALITY_METRICS_REPORTER_H_

#include <memory>
#include <string>

#include "absl/strings/string_view.h"
#include "api/test/metrics/metrics_logger.h"
#include "api/test/network_emulation_manager.h"
#include "api/test/peerconnection_quality_test_fixture.h"
#include "api/test/track_id_stream_info_map.h"
#include "api/units/data_size.h"
#include "rtc_base/synchronization/mutex.h"

namespace webrtc {
namespace webrtc_pc_e2e {

class NetworkQualityMetricsReporter
    : public PeerConnectionE2EQualityTestFixture::QualityMetricsReporter {
 public:
  NetworkQualityMetricsReporter(EmulatedNetworkManagerInterface* alice_network,
                                EmulatedNetworkManagerInterface* bob_network,
                                test::MetricsLogger* metrics_logger);
  NetworkQualityMetricsReporter(absl::string_view alice_network_label,
                                EmulatedNetworkManagerInterface* alice_network,
                                absl::string_view bob_network_label,
                                EmulatedNetworkManagerInterface* bob_network,
                                test::MetricsLogger* metrics_logger);
  ~NetworkQualityMetricsReporter() override = default;

  // Network stats must be empty when this method will be invoked.
  void Start(absl::string_view test_case_name,
             const TrackIdStreamInfoMap* reporter_helper) override;
  void OnStatsReports(
      absl::string_view pc_label,
      const rtc::scoped_refptr<const RTCStatsReport>& report) override;
  void StopAndReportResults() override;

 private:
  struct PCStats {
    // TODO(nisse): Separate audio and video counters. Depends on standard stat
    // counters, enabled by field trial "WebRTC-UseStandardBytesStats".
    DataSize payload_received = DataSize::Zero();
    DataSize payload_sent = DataSize::Zero();
  };

  static EmulatedNetworkStats PopulateStats(
      EmulatedNetworkManagerInterface* network);
  void ReportStats(const std::string& network_label,
                   const EmulatedNetworkStats& stats,
                   int64_t packet_loss);
  void ReportPCStats(const std::string& pc_label, const PCStats& stats);
  std::string GetTestCaseName(const std::string& network_label) const;

  std::string test_case_name_;

  EmulatedNetworkManagerInterface* const alice_network_;
  EmulatedNetworkManagerInterface* const bob_network_;
  test::MetricsLogger* const metrics_logger_;
  Mutex lock_;
  std::map<std::string, PCStats> pc_stats_ RTC_GUARDED_BY(lock_);
  std::string alice_network_label_ = "alice";
  std::string bob_network_label_ = "bob";
};

}  // namespace webrtc_pc_e2e
}  // namespace webrtc

#endif  // TEST_PC_E2E_NETWORK_QUALITY_METRICS_REPORTER_H_