// Copyright Epic Games, Inc. All Rights Reserved.

/*=============================================================================
        Matinee exporter for Unreal Engine 3.
=============================================================================*/

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"

class ABrush;
class ACameraActor;
class ALight;
class UModel;
class UStaticMeshComponent;
class USkeletalMeshComponent;

namespace fbxsdk
{
class FbxNode;
}

/** Adapter interface which allows finding the corresponding actor node name to act on both sequencer and matinee data. */
class INodeNameAdapter
{
public:
    virtual ~INodeNameAdapter() {}
    virtual FString GetActorNodeName(const AActor* InActor) { return InActor->GetName(); }
    virtual void AddFbxNode(UObject* InObject, fbxsdk::FbxNode* InFbxNode) {}
    virtual fbxsdk::FbxNode* GetFbxNode(UObject* InObject) { return nullptr; }
};
/**
 * Main Matinee Exporter class.
 * Except for CImporter, consider the other classes as private.
 */
class MatineeExporter
{
public:
    virtual ~MatineeExporter() {}

    /**
     * Load the export option from the last save state and show the dialog if bShowOptionDialog is true.
     * FullPath is the export file path we display it in the dialog
     * If user cancel the dialog, the OutOperationCanceled will be true
     * bOutExportAll will be true if the user want to use the same option for all other asset he want to export
     *
     * The function is saving the dialog state in a user ini file and reload it from there. It is not changing the CDO.
     */
    virtual void FillExportOptions(bool BatchMode, bool bShowOptionDialog, const FString& FullPath, bool& OutOperationCanceled, bool& bOutExportAll) = 0;

    /**
     * Creates and readies an empty document for export.
     */
    virtual void CreateDocument() = 0;

    void SetTrasformBaking(bool bBakeTransforms)
    {
        bBakeKeys = bBakeTransforms;
    }

    void SetKeepHierarchy(bool bInKeepHierarchy)
    {
        bKeepHierarchy = bInKeepHierarchy;
    }

    /**
     * Exports the basic scene information to a file.
     */
    virtual void ExportLevelMesh(ULevel* Level, bool bSelectedOnly, INodeNameAdapter& NodeNameAdapter, bool bSaveAnimSeq = true) = 0;

    /**
     * Exports the light-specific information for a light actor.
     */
    virtual void ExportLight(ALight* Actor, INodeNameAdapter& NodeNameAdapter) = 0;

    /**
     * Exports the camera-specific information for a camera actor.
     */
    virtual void ExportCamera(ACameraActor* Actor, bool bExportComponents, INodeNameAdapter& NodeNameAdapter) = 0;

    /**
     * Exports the mesh and the actor information for a brush actor.
     */
    virtual void ExportBrush(ABrush* Actor, UModel* Model, bool bConvertToStaticMesh, INodeNameAdapter& NodeNameAdapter) = 0;

    /**
     * Exports the mesh and the actor information for a static mesh actor.
     */
    virtual void ExportStaticMesh(AActor* Actor, UStaticMeshComponent* StaticMeshComponent, INodeNameAdapter& NodeNameAdapter) = 0;

    /**
     * Exports the given Matinee sequence information into a file.
     *
     * @return	true, if sucessful
     */
    virtual bool ExportMatinee(class AMatineeActor* InMatineeActor) = 0;

    /**
     * Writes the file to disk and releases it.
     */
    virtual void WriteToFile(const TCHAR* Filename) = 0;

    /**
     * Closes the file, releasing its memory.
     */
    virtual void CloseDocument() = 0;

protected:
    /** When true, a key will exported per frame at the set frames-per-second (FPS). */
    bool bBakeKeys;
    /** When true, we'll export with hierarchical relation of attachment with relative transform */
    bool bKeepHierarchy;
};