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

#pragma once

#include "CoreMinimal.h"
#include "Toolkits/IToolkitHost.h"
#include "Toolkits/AssetEditorToolkit.h"
#include "Editor/PropertyEditor/Public/PropertyEditorDelegates.h"

class IDetailsView;
class SDockableTab;

class UNREALED_API FSimpleAssetEditor: public FAssetEditorToolkit
{
public:
    /** Delegate that, given an array of assets, returns an array of objects to use in the details view of an FSimpleAssetEditor */
    DECLARE_DELEGATE_RetVal_OneParam(TArray<UObject*>, FGetDetailsViewObjects, const TArray<UObject*>&);

    virtual void RegisterTabSpawners(const TSharedRef<class FTabManager>& TabManager) override;
    virtual void UnregisterTabSpawners(const TSharedRef<class FTabManager>& TabManager) override;

    /**
     * Edits the specified asset object
     *
     * @param	Mode					Asset editing mode for this editor (standalone or world-centric)
     * @param	InitToolkitHost			When Mode is WorldCentric, this is the level editor instance to spawn this editor within
     * @param	ObjectsToEdit			The object to edit
     * @param	GetDetailsViewObjects	If bound, a delegate to get the array of objects to use in the details view; uses ObjectsToEdit if not bound
     */
    void InitEditor(const EToolkitMode::Type Mode, const TSharedPtr<class IToolkitHost>& InitToolkitHost, const TArray<UObject*>& ObjectsToEdit, FGetDetailsViewObjects GetDetailsViewObjects);

    /** Destructor */
    virtual ~FSimpleAssetEditor();

    /** IToolkit interface */
    virtual FName GetToolkitFName() const override;
    virtual FText GetBaseToolkitName() const override;
    virtual FText GetToolkitName() const override;
    virtual FText GetToolkitToolTipText() const override;
    virtual FString GetWorldCentricTabPrefix() const override;
    virtual FLinearColor GetWorldCentricTabColorScale() const override;
    virtual bool IsPrimaryEditor() const override { return true; }
    virtual bool IsSimpleAssetEditor() const override { return true; }

    /** FAssetEditorToolkit interface */
    virtual void PostRegenerateMenusAndToolbars() override;

    /** Used to show or hide certain properties */
    void SetPropertyVisibilityDelegate(FIsPropertyVisible InVisibilityDelegate);
    /** Can be used to disable the details view making it read-only */
    void SetPropertyEditingEnabledDelegate(FIsPropertyEditingEnabled InPropertyEditingDelegate);

private:
    /** Create the properties tab and its content */
    TSharedRef<SDockTab> SpawnPropertiesTab(const FSpawnTabArgs& Args);

    /** Handles when an asset is imported */
    void HandleAssetPostImport(class UFactory* InFactory, UObject* InObject);

    /** Called when objects need to be swapped out for new versions, like after a blueprint recompile. */
    void OnObjectsReplaced(const TMap<UObject*, UObject*>& ReplacementMap);

    /** Dockable tab for properties */
    TSharedPtr<SDockableTab> PropertiesTab;

    /** Details view */
    TSharedPtr<class IDetailsView> DetailsView;

    /** App Identifier. Technically, all simple editors are the same app, despite editing a variety of assets. */
    static const FName SimpleEditorAppIdentifier;

    /**	The tab ids for all the tabs used */
    static const FName PropertiesTabId;

    /** The objects open within this editor */
    TArray<UObject*> EditingObjects;

public:
    /** The name given to all instances of this type of editor */
    static const FName ToolkitFName;

    static TSharedRef<FSimpleAssetEditor> CreateEditor(const EToolkitMode::Type Mode, const TSharedPtr<IToolkitHost>& InitToolkitHost, UObject* ObjectToEdit, FGetDetailsViewObjects GetDetailsViewObjects = FGetDetailsViewObjects());

    static TSharedRef<FSimpleAssetEditor> CreateEditor(const EToolkitMode::Type Mode, const TSharedPtr<IToolkitHost>& InitToolkitHost, const TArray<UObject*>& ObjectsToEdit, FGetDetailsViewObjects GetDetailsViewObjects = FGetDetailsViewObjects());
};