/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef THRIFT_TEST_LOADGEN_QPSMONITOR_H_
#define THRIFT_TEST_LOADGEN_QPSMONITOR_H_ 1

#include <chrono>

#include <thrift/lib/cpp/test/loadgen/OpEnabledState.h>
#include <thrift/lib/cpp/test/loadgen/QpsScoreBoard.h>
#include <thrift/lib/cpp/test/loadgen/TerminalMonitor.h>

namespace apache {
namespace thrift {
namespace loadgen {

class LoadConfig;

/**
 * A Monitor implementation that prints QPS rates for all operations.
 */
class QpsMonitor : public TerminalMonitor {
 public:
  explicit QpsMonitor(const std::shared_ptr<LoadConfig>& config);

  std::shared_ptr<ScoreBoard> newScoreBoard(int id) override;

  void initializeInfo() override;
  uint32_t printHeader() override;
  uint32_t printInfo(uint64_t intervalUsec) override;
  uint64_t getCurrentQps() override;

  OpEnabledState* getEnabledState() { return &enabledState_; }

  const OpEnabledState* getEnabledState() const { return &enabledState_; }

  void printAllTimeQps(bool enabled) { printAllTime_ = enabled; }

 private:
  typedef std::vector<std::shared_ptr<QpsScoreBoard>> ScoreBoardVector;

  void computeAggregate(QpsScoreBoard* scoreboard);

  std::chrono::steady_clock::time_point initialTime_;
  uint64_t initialSum_;

  bool printAllTime_;
  OpEnabledState enabledState_;

  QpsScoreBoard aggregateScoreBoard_;
  ScoreBoardVector scoreboards_;
  std::shared_ptr<LoadConfig> config_;

  uint64_t currentQps_;
};

} // namespace loadgen
} // namespace thrift
} // namespace apache

#endif // THRIFT_TEST_LOADGEN_QPSMONITOR_H_