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

#pragma once

#include "CoreMinimal.h"
#include "UObject/Object.h"
#include "Templates/SubclassOf.h"
#include "Modules/ModuleManager.h"
#include "Misc/PackageName.h"
#include "Input/Reply.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Widgets/SWindow.h"
#include "Animation/Skeleton.h"
#include "Animation/AnimationAsset.h"
#include "Editor/ContentBrowser/Public/IContentBrowserSingleton.h"
#include "Editor/ContentBrowser/Public/ContentBrowserModule.h"
#include "Developer/AssetTools/Public/IAssetTools.h"
#include "Developer/AssetTools/Public/AssetToolsModule.h"

class FMenuBuilder;
class UAnimBlueprint;
class UAnimBoneCompressionSettings;
class UAnimSequence;
class UEdGraph;
class UPoseWatch;
class UEdGraphNode;

/** dialog to prompt users to decide an animation asset name */
class SCreateAnimationAssetDlg: public SWindow
{
public:
    SLATE_BEGIN_ARGS(SCreateAnimationAssetDlg)
    {
    }
    SLATE_ARGUMENT(FText, DefaultAssetPath)
    SLATE_END_ARGS()

    SCreateAnimationAssetDlg()
        : UserResponse(EAppReturnType::Cancel)
    {
    }

    void Construct(const FArguments& InArgs);

public:
    /** Displays the dialog in a blocking fashion */
    EAppReturnType::Type ShowModal();

    /** Gets the resulting asset path */
    FString GetAssetPath();

    /** Gets the resulting asset name */
    FString GetAssetName();

    /** Gets the resulting full asset path (path+'/'+name) */
    FString GetFullAssetPath();

protected:
    void OnPathChange(const FString& NewPath);
    void OnNameChange(const FText& NewName, ETextCommit::Type CommitInfo);
    FReply OnButtonClick(EAppReturnType::Type ButtonID);

    bool ValidatePackage();

    EAppReturnType::Type UserResponse;
    FText AssetPath;
    FText AssetName;

    static FText LastUsedAssetPath;
};

/** A struct containing the settings to control the SAnimationCompressionSelectionDialog creation. */
struct FAnimationCompressionSelectionDialogConfig
{
    FText DialogTitleOverride;
    FVector2D WindowSizeOverride;

    UAnimBoneCompressionSettings* DefaultSelectedAsset;

    FAnimationCompressionSelectionDialogConfig()
        : WindowSizeOverride(ForceInitToZero), DefaultSelectedAsset(nullptr)
    {}
};

/** Dialog to prompt user to select an animation compression settings asset. */
class UNREALED_API SAnimationCompressionSelectionDialog: public SCompoundWidget
{
public:
    /** Called from the Dialog when an asset has been selected. */
    DECLARE_DELEGATE_OneParam(FOnAssetSelected, const FAssetData& /*SelectedAsset*/);

    SLATE_BEGIN_ARGS(SAnimationCompressionSelectionDialog) {}

    SLATE_END_ARGS()

    SAnimationCompressionSelectionDialog();
    virtual ~SAnimationCompressionSelectionDialog();

    virtual void Construct(const FArguments& InArgs, const FAnimationCompressionSelectionDialogConfig& InConfig);

    /** Sets the delegate handler for when an open operation is committed */
    void SetOnAssetSelected(const FOnAssetSelected& InHandler);

private:
    void DoSelectAsset(const FAssetData& SelectedAsset);
    FReply OnConfirmClicked();
    FReply OnCancelClicked();
    void CloseDialog();
    void OnAssetSelected(const FAssetData& AssetData);
    void OnAssetsActivated(const TArray<FAssetData>& SelectedAssets, EAssetTypeActivationMethod::Type ActivationType);
    bool IsConfirmButtonEnabled() const;

    /** Asset Picker used by the dialog */
    TSharedPtr<SWidget> AssetPicker;

    /** The assets that are currently selected in the asset picker */
    TArray<FAssetData> CurrentlySelectedAssets;

    /** Used to specify that a valid asset was chosen */
    bool bValidAssetChosen;

    /** Fired when assets are chosen for open. Only fired in open dialogs. */
    FOnAssetSelected OnAssetSelectedHandler;

    /** Used to get the currently selected assets */
    FGetCurrentSelectionDelegate GetCurrentSelectionDelegate;
};

/** Defines FCanExecuteAction delegate interface. Returns false to force the caller to delete the just created assets*/
DECLARE_DELEGATE_RetVal_OneParam(bool, FAnimAssetCreated, TArray<class UObject*>);

// Animation editor utility functions
namespace AnimationEditorUtils
{
UNREALED_API FAssetData CreateModalAnimationCompressionSelectionDialog(const FAnimationCompressionSelectionDialogConfig& InConfig);

UNREALED_API void CreateAnimationAssets(const TArray<TWeakObjectPtr<UObject>>& SkeletonsOrSkeletalMeshes, TSubclassOf<UAnimationAsset> AssetClass, const FString& InPrefix, FAnimAssetCreated AssetCreated, UObject* NameBaseObject = nullptr, bool bDoNotShowNameDialog = false);

UNREALED_API void CreateNewAnimBlueprint(TArray<TWeakObjectPtr<UObject>> SkeletonsOrSkeletalMeshes, FAnimAssetCreated AssetCreated, bool bInContentBrowser);
UNREALED_API void FillCreateAssetMenu(FMenuBuilder& MenuBuilder, const TArray<TWeakObjectPtr<UObject>>& SkeletonsOrSkeletalMeshes, FAnimAssetCreated AssetCreated, bool bInContentBrowser = true);
UNREALED_API void CreateUniqueAssetName(const FString& InBasePackageName, const FString& InSuffix, FString& OutPackageName, FString& OutAssetName);

/** Applies the animation compression codecs to the sequence list with optional override settings */
UNREALED_API bool ApplyCompressionAlgorithm(TArray<UAnimSequence*>& AnimSequencePtrs, UAnimBoneCompressionSettings* OverrideSettings);

// template version of simple creating animation asset
template <class T>
T* CreateAnimationAsset(UObject* SkeletonOrSkeletalMesh, const FString& AssetPath, const FString& InPrefix)
{
    USkeletalMesh* SkeletalMesh = nullptr;
    USkeleton* Skeleton         = Cast<USkeleton>(SkeletonOrSkeletalMesh);
    if (Skeleton == nullptr)
    {
        SkeletalMesh = CastChecked<USkeletalMesh>(SkeletonOrSkeletalMesh);
        Skeleton     = SkeletalMesh->GetSkeleton();
    }

    if (Skeleton)
    {
        FString Name;
        FString PackageName;
        // Determine an appropriate name
        CreateUniqueAssetName(AssetPath, InPrefix, PackageName, Name);

        // Create the asset, and assign its skeleton
        FAssetToolsModule& AssetToolsModule = FModuleManager::GetModuleChecked<FAssetToolsModule>("AssetTools");
        T* NewAsset                         = Cast<T>(AssetToolsModule.Get().CreateAsset(Name, FPackageName::GetLongPackagePath(PackageName), T::StaticClass(), NULL));

        if (NewAsset)
        {
            NewAsset->SetSkeleton(Skeleton);
            if (SkeletalMesh)
            {
                NewAsset->SetPreviewMesh(SkeletalMesh);
            }
            NewAsset->MarkPackageDirty();
        }

        return NewAsset;
    }

    return nullptr;
}

// The following functions are used to fix subgraph arrays for assets
UNREALED_API void RegenerateSubGraphArrays(UAnimBlueprint* Blueprint);
void RegenerateGraphSubGraphs(UAnimBlueprint* OwningBlueprint, UEdGraph* GraphToFix);
void RemoveDuplicateSubGraphs(UEdGraph* GraphToClean);
UNREALED_API void FindChildGraphsFromNodes(UEdGraph* GraphToSearch, TArray<UEdGraph*>& ChildGraphs);

// Is the supplied UEdGraph an Animation Graph
UNREALED_API bool IsAnimGraph(UEdGraph* Graph);

UNREALED_API void SetPoseWatch(UPoseWatch* PoseWatch, UAnimBlueprint* AnimBlueprintIfKnown = nullptr);
UNREALED_API UPoseWatch* FindPoseWatchForNode(const UEdGraphNode* Node, UAnimBlueprint* AnimBlueprintIfKnown = nullptr);
UNREALED_API void MakePoseWatchForNode(UAnimBlueprint* AnimBlueprint, UEdGraphNode* Node, FColor PoseWatchColour);
UNREALED_API void RemovePoseWatch(UPoseWatch* PoseWatch, UAnimBlueprint* AnimBlueprintIfKnown = nullptr);
UNREALED_API void UpdatePoseWatchColour(UPoseWatch* PoseWatch, FColor NewPoseWatchColour);

//////////////////////////////////////////////////////////////////////////////////////////

template <typename TFactory, typename T>
void ExecuteNewAnimAsset(TArray<TWeakObjectPtr<UObject>> SkeletonsOrSkeletalMeshes, const FString InSuffix, FAnimAssetCreated AssetCreated, bool bInContentBrowser)
{
    if (bInContentBrowser && SkeletonsOrSkeletalMeshes.Num() == 1)
    {
        USkeletalMesh* SkeletalMesh = nullptr;
        USkeleton* Skeleton         = Cast<USkeleton>(SkeletonsOrSkeletalMeshes[0].Get());
        if (Skeleton == nullptr)
        {
            SkeletalMesh = CastChecked<USkeletalMesh>(SkeletonsOrSkeletalMeshes[0].Get());
            Skeleton     = SkeletalMesh->GetSkeleton();
        }

        if (Skeleton)
        {
            // Determine an appropriate name for inline-rename
            FString Name;
            FString PackageName;
            CreateUniqueAssetName(Skeleton->GetOutermost()->GetName(), InSuffix, PackageName, Name);

            TFactory* Factory                           = NewObject<TFactory>();
            Factory->TargetSkeleton                     = Skeleton;
            Factory->PreviewSkeletalMesh                = SkeletalMesh;

            FContentBrowserModule& ContentBrowserModule = FModuleManager::LoadModuleChecked<FContentBrowserModule>("ContentBrowser");
            ContentBrowserModule.Get().CreateNewAsset(Name, FPackageName::GetLongPackagePath(PackageName), T::StaticClass(), Factory);

            if (AssetCreated.IsBound())
            {
                // @TODO: this doesn't work
                // FString LongPackagePath = FPackageName::GetLongPackagePath(PackageName);
                UObject* Parent   = FindPackage(NULL, *PackageName);
                UObject* NewAsset = FindObject<UObject>(Parent, *Name, false);
                if (NewAsset)
                {
                    TArray<UObject*> NewAssets;
                    NewAssets.Add(NewAsset);
                    if (!AssetCreated.Execute(NewAssets))
                    {
                        // Destroy the assets we just create
                        for (UObject* ObjectToDelete: NewAssets)
                        {
                            ObjectToDelete->ClearFlags(RF_Standalone | RF_Public);
                            ObjectToDelete->RemoveFromRoot();
                            ObjectToDelete->MarkPendingKill();
                        }
                        CollectGarbage(GARBAGE_COLLECTION_KEEPFLAGS);
                    }
                }
            }
        }
    }
    else
    {
        CreateAnimationAssets(SkeletonsOrSkeletalMeshes, T::StaticClass(), InSuffix, AssetCreated);
    }
}
}  // namespace AnimationEditorUtils