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


#include "MyBlueprintFunctionLibrary.h"
#include "Internationalization/Regex.h"






void UMyBlueprintFunctionLibrary::AdjustViewportSize(float OriginX, float OriginY, float SizeX, float SizeY)
{
	GEngine->GameViewport->SplitscreenInfo[0].PlayerData[0].OriginX = OriginX; // default: 0.f
	GEngine->GameViewport->SplitscreenInfo[0].PlayerData[0].OriginY = OriginY; // default: 0.f
	GEngine->GameViewport->SplitscreenInfo[0].PlayerData[0].SizeX = SizeX; // default 1.f
	GEngine->GameViewport->SplitscreenInfo[0].PlayerData[0].SizeY = SizeY; // default 1.f
}




FColor UMyBlueprintFunctionLibrary::HexToColor(FString HexString)
{
    return FColor::FromHex(HexString);
}




TArray<FString> UMyBlueprintFunctionLibrary::GetCode(const FString& Condition)
{
    std::regex pattern("\\w{2,26}");
    std::smatch match;
    TArray<FString> code_list;

    std::string conditionString = TCHAR_TO_UTF8(*Condition);
    std::string::const_iterator search_start(conditionString.cbegin());
    while (std::regex_search(search_start, conditionString.cend(), match, pattern))
    {
        FString code(match[0].str().c_str());
        code_list.Add(code);
        search_start = match.suffix().first;
    }

    code_list.Sort([](const FString& a, const FString& b)
        {
            return a.Len() > b.Len();
        });

    return code_list;
}

FString UMyBlueprintFunctionLibrary::ReplaceBoolean(const FString& Condition)
{
    FString result = Condition.Replace(TEXT("|"), TEXT("or"));
    result = result.Replace(TEXT("&"), TEXT("and"));
    result = result.Replace(TEXT("!"), TEXT("not "));
    return result;
}

bool UMyBlueprintFunctionLibrary::Solver(const TArray<FString>& ProductCodeList, const FString& Condition)
{
    FString condition = Condition;
    TArray<FString> condition_code = GetCode(condition);
    check(condition_code.Num() > 0);

    for (const FString& p_code : condition_code)
    {
        if (ProductCodeList.Contains(p_code))
        {
            condition = condition.Replace(*p_code, TEXT("True"));
        }
        else
        {
            condition = condition.Replace(*p_code, TEXT("False"));
        }
    }

    FString resultString = ReplaceBoolean(condition);
    std::string result = TCHAR_TO_UTF8(*resultString);
    return std::stoi(result);
}