// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "SCompoundWidget.h"
#include "SlateInvalidationRoot.h"
#include "SLeafWidget.h"
#include "Render/UpdatableTexture.h"
#include "Misc/CallRateLimiter.h"

class SUpdatableImage;
class FUpdatableTexture;
class FSlateUpdatableTexture;

/**
 * 
 */
class ARONA_API SUpdatableImage : public SLeafWidget
{
	friend class FUpdatableTexture;
public:
	SUpdatableImage();
	SLATE_BEGIN_ARGS(SUpdatableImage):
		_UpdateInterval(0.1f),
		_FixedWidth(),
		_FixedHeight()
		{}

	SLATE_EVENT(FUpdatableImageDataEvent, OnPostResize)
	SLATE_ARGUMENT(float, UpdateInterval)
	SLATE_ARGUMENT(TOptional<int32>, FixedWidth)
	SLATE_ARGUMENT(TOptional<int32>, FixedHeight)
	SLATE_ARGUMENT(TOptional<int32>, MaxWidth)
	SLATE_ARGUMENT(TOptional<int32>, MaxHeight)
	
	SLATE_END_ARGS()

	/** Constructs this widget with InArgs */
	void Construct(const FArguments& InArgs);

	void NeedRedraw();
	
	void Resize(FIntPoint NewSize, bool Immediate = false);
	
	virtual int32 OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const override;
	virtual FVector2D ComputeDesiredSize(float LayoutScaleMultiplier) const override { return FVector2D(LastSize); }
	
	TOptional<int32> FixedWidth;
	TOptional<int32> FixedHeight;
	TOptional<int32> MaxWidth;
	TOptional<int32> MaxHeight;
private:
	void AsyncUpdate() const;
	
	mutable FVector2f LastSize;
	TSharedPtr<FUpdatableTexture> Texture;
	mutable bool ForceRedraw = false;
};