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

#pragma once

#include "CoreMinimal.h"
#include "Blueprint/UserWidget.h"
#include "SpellOverlay.generated.h"

/**
 * A widget that displays the spell trace
 */
UCLASS()
class WIZARDINGCENTRAL_API USpellOverlay : public UUserWidget
{
	GENERATED_BODY()

	/** The points of the spell trace */
	UPROPERTY(BlueprintReadWrite, Category = "Spell Overlay", meta = (AllowPrivateAccess = "true"))
	TArray<FVector2D> SpellPoints;

	/** The color of the spell trace */
	UPROPERTY(BlueprintReadWrite, Category = "Spell Overlay", meta = (AllowPrivateAccess = "true"), EditAnywhere)
	FLinearColor SpellLineColor = FLinearColor::Black;
	/** The thickness of the spell trace */
	UPROPERTY(BlueprintReadWrite, Category = "Spell Overlay", meta = (AllowPrivateAccess = "true"), EditAnywhere)
	float SpellLineThickness = 2.0f;
	/** Whether the spell trace should be anti-aliased */
	UPROPERTY(BlueprintReadWrite, Category = "Spell Overlay", meta = (AllowPrivateAccess = "true"), EditAnywhere)
	bool bAntiAlias = true;

protected:
	virtual int32
	NativePaint(const FPaintArgs& Args,
	            const FGeometry& AllottedGeometry,
	            const FSlateRect& MyCullingRect,
	            FSlateWindowElementList& OutDrawElements,
	            int32 LayerId,
	            const FWidgetStyle& InWidgetStyle,
	            bool bParentEnabled) const override;

public:
	SIZE_T
	GetNumPoints() const;

	const FVector2D&
	GetLastPoint();

	const TArray<FVector2D>*
	GetSpellPoints() const;

	const FVector2D&
	GetLastPoint(const FVector2D& CurrPoint);

	void
	AddPoint(const FVector2D& Point);

	void
	Clear();
};