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


#include "SpellOverlay.h"

#include "Blueprint/WidgetBlueprintLibrary.h"
#include "Rendering/DrawElements.h"

int32
USpellOverlay::NativePaint(const FPaintArgs& Args,
                           const FGeometry& AllottedGeometry,
                           const FSlateRect& MyCullingRect,
                           FSlateWindowElementList& OutDrawElements,
                           const int32 LayerId,
                           const FWidgetStyle& InWidgetStyle,
                           const bool bParentEnabled) const
{
	Super::NativePaint(
		Args,
		AllottedGeometry,
		MyCullingRect,
		OutDrawElements,
		LayerId,
		InWidgetStyle,
		bParentEnabled
	);

	FPaintContext Context(
		AllottedGeometry,
		MyCullingRect,
		OutDrawElements,
		LayerId,
		InWidgetStyle,
		bParentEnabled
	);

	UWidgetBlueprintLibrary::DrawLines(
		Context, SpellPoints,
		this->SpellLineColor,
		this->bAntiAlias,
		this->SpellLineThickness
	);

	return LayerId + 1;
}

SIZE_T USpellOverlay::GetNumPoints() const
{
	return this->SpellPoints.Num();
}

const FVector2D& USpellOverlay::GetLastPoint()
{
	return this->SpellPoints.Last();
}

const TArray<FVector2D>* USpellOverlay::GetSpellPoints() const
{
	return &this->SpellPoints;
}

const FVector2D& USpellOverlay::GetLastPoint(const FVector2D& CurrPoint)
{
	return this->SpellPoints.Num() > 0 ? this->SpellPoints.Last() : CurrPoint;
}

void USpellOverlay::AddPoint(const FVector2D& Point)
{
	this->SpellPoints.Add(Point);
}

void USpellOverlay::Clear()
{
	this->SpellPoints.Empty();
}