#pragma once

#include <assert.h>
#include <stdio.h>

class FramesPerSecondCounter
{
public:
  explicit FramesPerSecondCounter(float avgInterval = 0.5f)
  : avgInterval_(avgInterval)
  {
    assert(avgInterval > 0.0f);
  }

  bool tick(float deltaSeconds, bool frameRendered = true)
  {
    if (frameRendered)
      numFrames_++;

    accumulatedTime_ += deltaSeconds;

    if (accumulatedTime_ > avgInterval_) {
      currentFPS_ = static_cast<float>(numFrames_ / accumulatedTime_);
      if (printFPS_)
        printf("FPS: %.1f\n", currentFPS_);
      numFrames_       = 0;
      accumulatedTime_ = 0;
      return true;
    }

    return false;
  }

  inline float getFPS() const { return currentFPS_; }

  bool printFPS_ = true;

public:
  float avgInterval_ = 0.5f;
  unsigned int numFrames_  = 0;
  double accumulatedTime_  = 0;
  float currentFPS_        = 0.0f;
};