#pragma region CPL License
/*
Nuclex Unreal Module
Copyright (C) 2014-2021 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

#include "FadeOutAction.h"

// --------------------------------------------------------------------------------------------- //

FFadeOutAction::FFadeOutAction(
  const FLatentActionInfo &latentInfo,
  APlayerCameraManager *cameraManager,
  float durationSeconds
) :
  callbackTarget(latentInfo.CallbackTarget),
  executionFunction(latentInfo.ExecutionFunction),
  outputLink(latentInfo.Linkage),
  cameraManager(cameraManager),
  durationSeconds(durationSeconds),
  elapsedSeconds(0.0f) {}

// --------------------------------------------------------------------------------------------- //

void FFadeOutAction::UpdateOperation(FLatentResponse &response) {
  const bool fadeAudio = true;

  this->elapsedSeconds += response.ElapsedTime();
  if(this->elapsedSeconds < this->durationSeconds) {
    if(IsValid(this->cameraManager)) {
      float fadeAmount = this->elapsedSeconds / this->durationSeconds;
      fadeAmount *= fadeAmount;
      this->cameraManager->SetManualCameraFade(
        FMath::Sqrt(fadeAmount), FLinearColor::Black, fadeAudio
      );
    }
  } else {
    if(IsValid(this->cameraManager)) {
      this->cameraManager->SetManualCameraFade(1.0f, FLinearColor::Black, fadeAudio);
    }

    response.FinishAndTriggerIf(
      true,
      this->executionFunction,
      this->outputLink,
      this->callbackTarget
    );
  }
}

// --------------------------------------------------------------------------------------------- //