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

#pragma once

#include "CoreMinimal.h"

template<typename EnumType>
class ResComStateManager
{
protected:
	TArray<EnumType> stateHistory;
	EnumType nullobj;
public:
	ResComStateManager() : nullobj(EnumType())
	{

	}

	bool SetState(const EnumType& newState)
	{
		if (GetState() == newState)
			return false;
		stateHistory.Push(newState);
		return true;
	}
	
	const EnumType& GetState() const
	{
		return static_cast<bool>(stateHistory.Num()) ? stateHistory[stateHistory.Num() - 1] : nullobj;
	}

	bool SetPrevState()
	{
		if (stateHistory.Num() < 2)
			return false;
		stateHistory.Pop();
		return true;
	}

	const EnumType& GetPreviousState() const
	{
		return (stateHistory.Num() > 1) ? stateHistory[stateHistory.Num() - 2] : GetState();
	}

	void ClearAllStatesBesideLast()
	{
		auto lastState = GetState();
		stateHistory.Empty();
		SetState(lastState);
	}

	const TArray<EnumType>& GetHistory() const
	{
		return stateHistory;
	}
};