#include "GameLift/GameLiftClp.h"

FPortResult cmdlineparser::GetConfiguredOrDefaultPort(const FString& Token)
{
	return details::GetConfiguredOrDefaultPort(FCommandLine::Get(), Token);
}

FPortResult cmdlineparser::GetConfiguredOrDefaultPort(const FString& CommandLine, const FString& Token)
{
	return details::GetConfiguredOrDefaultPort(CommandLine, Token);
}

cmdlineparser::details::FParseResult cmdlineparser::GetValueOfToken(const FString& CommandLine, const details::EAvailableTokens Token)
{
	details::FParseResult Result;
	FString ValueOfToken;
	Result.Token = Token;
	
	ensure(Token != details::EAvailableTokens::Unknown);
	ensure(Token < details::EAvailableTokens::MaxToken);
	const bool bTokenFound = FParse::Value(
		*CommandLine, 
		*details::EnsureEndsWith(details::CLI_TOKENS[static_cast<int32>(Token)], 
		TEXT("=")), 
		ValueOfToken
		);
	
	if (!bTokenFound)
	{
		Result.Value = FString();
		Result.ErrorCode = details::EErrorCodes::TokenNotFound;
		Result.bIsValid = false;
	}
	else
	{
		if (ValueOfToken.IsEmpty())
		{
			Result.Value = FString();
			Result.ErrorCode = details::EErrorCodes::ValueEmpty;
			Result.bIsValid = false;
		}
		else
		{
			if (details::DoesRegExMatch(ValueOfToken, details::REGEX_PATTERNS[static_cast<int32>(Token)]))
			{
				Result.ErrorCode = details::EErrorCodes::NoError;
            	Result.bIsValid = true;	
			}
			else
			{
				Result.ErrorCode = details::EErrorCodes::FailedValidation;
				Result.bIsValid = false;
			}
			Result.Value = ValueOfToken;
		}
	}
	
	ensure(Result.ErrorCode < details::EErrorCodes::MaxCode);
	FString ErrorMessage = details::ERROR_MESSAGES[static_cast<int32>(Result.ErrorCode)];
	FString TokenName = details::CLI_TOKENS[static_cast<int32>(Result.Token)];
	FString Value = Result.Value;
	Result.ErrorMessage = ErrorMessage;
	
	return Result;
}


//  cmdlineparser::Details namespace

FString cmdlineparser::details::EnsureEndsWith(const FString& Token, const TCHAR* Suffix)
{
	return Token.EndsWith(Suffix) ? Token : Token + Suffix;
}

FPortResult cmdlineparser::details::GetConfiguredOrDefaultPort(const FString& CommandLine, const FString& Token)
{
	FPortResult PortResult;
	PortResult.Port = FURL::UrlConfig.DefaultPort;

	if (int32 CliPort; FParse::Value(*CommandLine, *EnsureEndsWith(Token, TEXT("=")), CliPort))
	{
		if (CliPort >= details::MIN_PORT && CliPort <= details::MAX_PORT)
		{
			PortResult.Port = CliPort;
			PortResult.bUsedDefaultPort = false;
			PortResult.WarningMessage = FString();
			return PortResult;
		}
	}
	PortResult.bUsedDefaultPort = true;
	PortResult.WarningMessage = FString::Printf(TEXT("Command Line Option for Port is out of ranged...  Using Default Port %d"), PortResult.Port);
	return PortResult;
}

bool cmdlineparser::details::DoesRegExMatch(const FString& Text, const FString& Pattern)
{
	const FRegexPattern RegexPattern(Pattern);
	FRegexMatcher Matcher(RegexPattern, Text);
	return Matcher.FindNext();
}