// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "UObject/WeakObjectPtr.h"
#include "Modules/ModuleInterface.h"
#include "HardwareTargetingSettings.h"

class SWidget;

DECLARE_DELEGATE_OneParam(FOnHardwareClassChanged, EHardwareClass::Type)
DECLARE_DELEGATE_OneParam(FOnGraphicsPresetChanged, EGraphicsPreset::Type)

/** Struct specifying pending changes to a settings object */
struct FModifiedDefaultConfig
{
	/** The settings object to which the description relates */
	TWeakObjectPtr<UObject> SettingsObject;

	/** Heading describing the name of the category */
	FText CategoryHeading;

	/** Text describing the pending changes to the settings */
	FText Description;
};

class IHardwareTargetingModule : public IModuleInterface
{
public:

	/** Singleton access to this module */
	HARDWARETARGETING_API static IHardwareTargetingModule& Get();

	/** Apply the current hardware targeting settings if they have changed */
	virtual void ApplyHardwareTargetingSettings() = 0;

	/** Gets a list of objects that are required to be writable in order to apply the settings */
	virtual TArray<FModifiedDefaultConfig> GetPendingSettingsChanges() = 0;

	/** Make a new combo box for choosing a hardware class target */
	virtual TSharedRef<SWidget> MakeHardwareClassTargetCombo(FOnHardwareClassChanged OnChanged, TAttribute<EHardwareClass::Type> SelectedEnum) = 0;

	/** Make a new combo box for choosing a graphics preference */
	virtual TSharedRef<SWidget> MakeGraphicsPresetTargetCombo(FOnGraphicsPresetChanged OnChanged, TAttribute<EGraphicsPreset::Type> SelectedEnum) = 0;
};