#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 "ShowParagraphAction.h"

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

FShowParagraphAction::FShowParagraphAction(
  const FLatentActionInfo &latentInfo,
  const TSharedPtr<TrackedParagraphBoxState> &paragraphBoxState,
  EDialogueChoice *selectedChoice
) :
  callbackTarget(latentInfo.CallbackTarget),
  executionFunction(latentInfo.ExecutionFunction),
  outputLink(latentInfo.Linkage),
  paragraphBoxState(paragraphBoxState),
  selectedChoice(selectedChoice) {}

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

void FShowParagraphAction::UpdateOperation(FLatentResponse &response) {
  if(this->paragraphBoxState.IsValid()) {
    if(!this->paragraphBoxState->Detached) {

      // Check if the player has confirmed the paragraph box. If the story controller
      // has been asked to also close the paragraph box, wait until its animation state
      // indicates that is has fully closed before completing
      bool isFinished = this->paragraphBoxState->Confirmed;
      if(isFinished && (!this->paragraphBoxState->KeepOpen)) {
        isFinished = (
          this->paragraphBoxState->AnimationState == EParagraphBoxAnimationState::Hidden
        );
      }

      // If this is a multiple-choice paragraph, select the Blueprint node's contiuation pin
      // via the choice made by the player
      if(isFinished) {
        if(this->selectedChoice != nullptr) {
          switch(this->paragraphBoxState->SelectedChoiceIndex) {
            case 0: { *this->selectedChoice = EDialogueChoice::Choice1; break; }
            case 1: { *this->selectedChoice = EDialogueChoice::Choice2; break; }
            case 2: { *this->selectedChoice = EDialogueChoice::Choice3; break; }
            case 3: { *this->selectedChoice = EDialogueChoice::Choice4; break; }
            case 4: { *this->selectedChoice = EDialogueChoice::Choice5; break; }
            default: { *this->selectedChoice = EDialogueChoice::Cancelled; break; }
          }
        }

        this->paragraphBoxState->IsLatentActionRunning = false;
      }

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

      // Make sure the default handler (which terminates the latent action without executing
      // any continuation pin) does not run.
      return;

    }

    // See below, but we also indicate that the latent action terminated if
    // the paragraph box state was still valid
    this->paragraphBoxState->IsLatentActionRunning = false;
  }

  // Paragraph box was detached or went bust (GC), so we quit, too
  response.DoneIf(true);
}

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