module;
#include <cstdint>

export module VUI:Time;

import :TimeInternal;

static uint64_t s_TimerOffset{0};
static double s_LastTime{0};
static double s_DeltaTime{0};

namespace VUI {
export double GetDeltaTime() { return s_DeltaTime; };
export double GetTime() {
  return static_cast<double>(GetTimerValue() - s_TimerOffset) /
         static_cast<double>(GetTimerFrequency());
};
export uint64_t GetTimeNs() {
  return static_cast<uint64_t>(
      static_cast<double>(GetTimerValue() - s_TimerOffset) * 1e9 /
      static_cast<double>(GetTimerFrequency()));
}
export void SetTime(const uint64_t time) {
  const auto dTimerValue = static_cast<double>(GetTimerValue());
  const auto dTime = static_cast<double>(time);
  const auto dFrequency = static_cast<double>(GetTimerFrequency());
  s_TimerOffset = static_cast<uint64_t>(dTimerValue - dTime * dFrequency);
};
export uint64_t GetTimeOffset() { return s_TimerOffset; }

export void UpdateDeltaTime() {
  const auto time = GetTime();
  s_DeltaTime = time - s_LastTime;
  s_LastTime = time;
};
} // namespace VUI