#include "UpdatableTexture.h"

#include "Async.h"
#include "Thread/MainThreadEventList.h"
#include "SlateApplication.h"

DECLARE_THREAD_MESSAGE(FMainThreadEventList, UpdatableTexture,
FUpdatableTexture* Texture;
)
{
	Args.Texture->Update();
	Args.Texture->UpdateCaller.Reset();
	UE_LOG(LogTemp, Log, TEXT("2"))
}

FUpdatableTexture::FUpdatableTexture(FIntPoint InTextureSize) : UpdateCaller(&FUpdatableTexture::AsyncUpdate, this)
{
	Data.Resize(InTextureSize);
	Texture = FSlateApplication::Get().GetRenderer()->CreateUpdatableTexture(Data.TextureSize.X, Data.TextureSize.Y);
	Texture->UpdateTexture(Data.Data);
}

void FUpdatableTexture::Resize(FIntPoint NewSize)
{
	if (NewSize.X > 16384)
		NewSize.X = 16384;
	if (NewSize.Y > 16384)
		NewSize.Y = 16384;
	
	NextSize = NewSize;
	ReSized = true;
}

void FUpdatableTexture::RequestUpdate(bool Async)
{
	UE_LOG(LogTemp, Log, TEXT("Request Update"))
	if (Async)
	{
		UpdateCaller.Call();
	}
	else
	{
		RedrawImage.ExecuteIfBound(Data);
		Update();
	}
}

void FUpdatableTexture::Update()
{
	if (ReSized)
		Texture->ResizeTexture(Data.TextureSize.X, Data.TextureSize.Y);
	Texture->UpdateTexture(Data.Data);
	ReSized = false;
	OnOverRedraw.ExecuteIfBound();
}

void FUpdatableTexture::AsyncUpdate()
{
	Async(EAsyncExecution::ThreadPool, [this]()
	{
		Data.Resize(NextSize);
		RedrawImage.ExecuteIfBound(Data);
		PUSH_THREAD_EVENT(UpdatableTexture, this);
	});
}