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


#include "SPatternThumbnail.h"

#include "Async.h"
#include "SInvalidationPanel.h"
#include "SlateOptMacros.h"
#include "SMidiPatternThumbnail.h"
#include "SSamplePatternThumbnail.h"
#include "STextBlock.h"
#include "Pattern/Pattern.h"

BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION

void SNullPatternThumbnail::Construct(const FArguments& InArgs, FText InText)
{
	ChildSlot
	[
		SNew(STextBlock)
		.Justification(ETextJustify::Center)
		.Text(InText)
	];
}

TSharedRef<SPatternThumbnail> SNullPatternThumbnail::Create(FText InText)
{
	return SNew(SNullPatternThumbnail, InText);
}

void SAutoPatternThumbnail::Construct(const FArguments& InArgs, FPattern* InPattern)
{
	SetPattern(InPattern);
}

void SAutoPatternThumbnail::SetPattern(FPattern* InPattern)
{
	Pattern = InPattern;
	ChildSlot.DetachWidget();
	Thumbnail = CreateThumbnail(InPattern);
	ChildSlot
	[
		SNew(SInvalidationPanel)
		[
			Thumbnail.ToSharedRef()
		]
	];
}

FReply SAutoPatternThumbnail::OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
	if (MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton && Thumbnail.IsValid())
	{
		if (Thumbnail->GetPattern())
		{
			OnPatternClicked.Broadcast(Thumbnail->GetPattern());
		}
	}
	return FReply::Unhandled();
}

FVector2D SAutoPatternThumbnail::ComputeDesiredSize(float LayoutScaleMultiplier) const
{
	return FVector2D(0, 36) * LayoutScaleMultiplier;
}

void SAutoPatternThumbnail::Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime)
{
	SCompoundWidget::Tick(AllottedGeometry, InCurrentTime, InDeltaTime);
	if (bNeedRedraw)
	{
		Thumbnail->Redraw();
		bNeedRedraw = false;
	}	
}

TSharedPtr<SPatternThumbnail> SAutoPatternThumbnail::CreateThumbnail(FPattern* InPattern)
{
	TSharedPtr<SPatternThumbnail> Out;
	if (!InPattern)
	{
		Out = SNullPatternThumbnail::Create(FText::FromString(TEXT("Null Pattern")));
	}
	else
	{
		switch (Pattern->Type)
		{
		case EPatternType::Midi:
			SAssignNew(Out, SMidiPatternThumbnail);
			break;
		case EPatternType::Automation:
			break;
		case EPatternType::Sample:
			SAssignNew(Out, SSamplePatternThumbnail, static_cast<FSamplePattern*>(InPattern)->GetSampler());
			break;
		default: ;
		}
	}
	Out->SetPattern(InPattern);
	return Out;
}

END_SLATE_FUNCTION_BUILD_OPTIMIZATION